US1994428A - Window lock and method for making the same - Google Patents

Description

March 12, 1935. F, E 7 1,994,428

WINDOW LOCK AND METHOD FOR MAKING THE SAME Filed Aug. 11, 1931 3 Sheets-Sheet &

2 v 5.9 30 0734 44 a3 24 27 J6 BY TTORNEYS March 12, 1935. v 1,994,428

' WINDOW LOCK AND METHOD FOR MAKING THE SAME Filed Aug. 11, 1951 3 Sheets-Sheet 2 INVENTOR BY/Z'L ATTORNEYS March 12, 1935. KE|| WINDOW LOCK AND METHOD FOR MAKING TH SAME Filed Aug. 11, 1951 3 Sheets-Sheet 5 BY A ATTORNEYS Patented Mar. 12, 1935 1 UNIT STATES QFFT CE" V V 1,994,42si Q wrNn owLooK AND METHOD FOR,MAKING I THE sin/1E u Henry F. Keil, Scarsdale, N. Y., assig nr to Francis Keil & Son, Inc., a

York

corporation of New Application August 11, 1931, SerialNo. 556,364

25 cams: (01. 29-148) and "be ofsimple and thoroughly practical construction." Another object of this invention. is to provide a device of the above characterwhich willbe durable and'dependable in operation.

' device of the above character which will be of inexpensive and ready manufacture and which may be easily and inexpensively installed. Anotherfobjectfof' this invention is to provide a practical and inexpensive method of constructing ade vioe of the above character. Another object of thisinvention is to provide a thoroughly efiicienhmethod of producing a device of the above character'which will reduce labor to a minimum and which the parts may be assembled in a rapid,convenient anddesirable manner; Other objects will be in part obvious and inpart pointed out hereinafter.

- The invention accordingly consists in theIfea turs of construction, combinations of elements, arrangements of parts and in the several steps and relation and order of cache]? the same to one or'more of the others, all as will be illustratively described herein, and the scope of the application of which will be'indicated in the followingclaims;

"Inthe accompanying (drawings, in which are shown a preferred form of the mechanical features ofmy invention, g V

V Figure 1 is a central vertical and longitudinal sectional view of a punch and die apparatus in openfl'positionfwith the raw material inserted therein readyfor operation thereon, V

Figure 2 is a similar sectional view of the same parts shown in Figure 1 in their closed 'or operated'position,

Figure '7 is a top plan view of the raw ma-- terial of Figure 6 after completion of another step of my method, H Figure 8 is a front elevation of aftoolior mechanism" used inano'ther step of mymethcd,

Another object of this invention is to provide a by heading over a reduced portion 19? of thescrew Figure 9 is a vertical cross-section of E: mechanism shown in Figure 8, taken along the Figure 10 is a front elevationpf theinecha nism of Figure 8 in a subsequent operative position, 1 Figure 11 is a perspective view of my window loch as completed, and,

Figure 12 is a diagrammaticview showing the position my look occupies when installed and operated. r

Similar reference characters refer to similar parts throughout the several views of the drawings. I

. Referringnow first to Figure 1l ther e 1 a V-shaped strip 10 having formed integrally therewith upon the opposite sides of; its'legs rll,

two outwardly extending flanges 12 and 13. Holes 14 and 15 extend throughflanges 12 and 1 3 and 5;. these holes-are preferably countersunk as at 16 and 1'7. The bottom y shaped part 1Q,:' .or. the

top thereof as shown in Figure 11, is formed into a. substantially. cylindrical interiorly threaded channel 18 with which a thumb screw 19 threaded engagement. Any convenient ,me ans may be providedior; turning screw 19 as, f01" example, an eye 20 at vone end thereof. An abut ting member 21 is rotatably secured to the, other,

end of screw 19 in any convenient manner,

19 as at 19' (better shown in Figure 9) lf screw 19 is-rotated, abutting member 21 travelsrelativa to part 18 in a direction depending. .upon the directionin which screw 19 is threaded. I

InFigure 12, I have shown oneofthe various, possible ways of mounting mylock upon a window sash. Thus, sashes .22 and-23 .are'ofhcommon window constructionand may slide upwardly and downwardly relative .to each other.. v,.As hereshown, the lock is mounted upon the top of bottom sash 23, this being easily accomplished by securing flanges 13 and 12 -to the 'sash injany con venient manner as by meansof screws passing:

through"holes 14and"15.' Thelockisso tioned that abutting member "2; adioinsland 'r wi o id Q ash 251. .wl ega uti. ting" member 21 is out of engagementwith sash 22 ,the two sashes may bemoved relative toea ch other until the desired position'thereof is reached. Subsequently, by rotating screw 19 and forcin ,1; abutting .znernber 2,1 a ainst sash. 22, a suitable: and thoroughly dependable jamming pf th mo .1- sashes' in the window frameis achievedsithua. prventirig"further"movement of the sashes or either of them ineither direction until screw 19 is loosened.

As conducive to a clearer understanding of certain features of this invention, it might be well to point out that considerable difficulty and inconvenience has been experienced in the past in manufacturing an article of this general character. As is past practice in manufacturing such an article, there is provided first abasethat is cast, drilled, tapped, and then the screw,'which is quite long, is threaded therethrough, requir-v ing much time and labor. Inorder to thread the screw through the base, the abuttingmember cannot be connected thereto until afterthe completion of this tedious operation. After the screw is threaded through the base, the partially completed article is unwieldy and difficult to handle while the abutting member is being secured to the screw. Special and cumbersome tools may and '30 on the bottom thereof culminating in a semi-cylindrical section 31 extending below the lowest portions of surfaces 29 and 30. As is more clearly shown in Figure 4, section 31 has formed upon its cylindrical surface a series of threads 32. 'Still referring to- Figure 4, knife member 26 has concave sides or cutting edges 33' and 34. Thus, if --knife' member 26 should be forced upon and through .a suitably supported metallic strip, it would out such a strip in sections having curved or rounded ends conforming to cutting or shearingwalls- 33 and 34 thereof.

Turning back to Figure l, punches 27 and 28 have round or cylindrical sections 35 and 36 pref erably extending below the main body thereof.

-As best shown in Figures 1 and 4, the bottom sides of the main body portions of punches 27 and 28 have formed therein concave indentations 37 and 38 respectively and adjoining sections 36 and 35 respectively} Thus annular ridges 37 and 384 "are formed upon the bot toms of punches 27 and 28 adjacent to but spaced from punch sections 36 and 35. If punches 27 and 28 are forced against a suitably supported metal strip, sections 36 and 35 would pierce holes in such strip and,

' if furtherpressure is applied, indentations 37 and 38 would form countersinks adjoining and about these holes-on the opposite sides of the strip.

Still referring to Figure 1, there is shown a die member 39 shaped to coact with punch mem ber 24.

Immediately belowpart 25 and more particularly below section 31 thereof there is formed in the die 39 a substantially half -cylindrical recess 40 corresponding in shape to section 31. Immediately adjoining recess 40 and in substantial registry with concave faces 29 and 30 of the punch part 25 are two walls 41 and 42 likewise corresponding in shape to and adapted to mate with faces29 'and30.

Over the top of die 39, and sufficiently spaced therefrom as will be described hereinafter, isa plate-like holding part 43" in the left'hand'end of which is a recess 44 as is better shown in Figures 1 and 5. Recess, 44 is in substantial registry with and=directly beneath shear member .pass through part 43.

26 and also conforms in shape and size thereto. Directly below recess 44, there is a recess 45 in die 39 corresponding, at its upper end, exactly in shape and size to shear member 26. 7 Thus shear member may pass freely through opening 44 in the upper part 43 and directly into the recess 45 with which it thus mates.

Two apertures 46 and 47 extend through-part" 43 near the right hand end therof and directly beneath punches 27 and 28 so that the latter may,

Directly beneath apertures 46 and 47 there are formed two apertures 48 and 49 in die 39 into which punch members 36 and 35 respectively may pass. Adjoining the sides of apertures 46 and 47 are'two annular grooves 50 and 51 formed in die 39 for registry or mating with ridges 37 and 28. V

Die member 39 is preferably secured to a suitable table in proper alignment with the various above described parts mounted upon the bottom of punch member 24, which punch is secured to shown) adapted to move it'downwardly relative to die 39 and then to retract it. Thus, when:

mounted in a suitable machine, punch member 24 and the various parts mounted thereon may be forced into interengagement with the correspond-; 1 ing parts or indentations and recesses in die members 39, all as described above. With th is and 38 of punches 27.

any suitable pressure exerting means (not apparatus I perform certain steps of my method.

I provide a suitable length of suitably hard or rigid sheet metal strip 52 preferably .Of the shape and size shown in Figure 6; it, is prefer-.

ably of so-called strap metal and is preferably of steel or hard brass. Part 43' is channeled along its under face and is sufficiently'spaced from die 39 so that there is formed therebetween a channel 54 along which strip 52 maybe fed I in a left-hand direction as viewed in Figures, 1,

2 and 5. Tostart my process, I insert one end of strip 52 into channel 54 so that an end portion of the strip underlies l aperture 47 in part 43.

Punch 24 is then releasedor'moved downwardly so that it assumes the position'shown in Figure 2. Section 35 of punch 28 pierces strip 52 to form a hole 55 and ridge 38 thereof forms a:

countersink 56 therein (see Figure 6).

Next, punch 24 rises and strip 52is fed along channel 54 until its end lies substantially beyond,

the right hand Wall of recess 44 in part 43 (Figures 1, 2 and 5). tion, punch '24 again moves to itsclosed position, as illustrated in Figure 2, shear member 26 cutting off the end as at 53 in Figure 6 and punch members 27 and 28forming a pair of'countersunk holes'57 and 58 in strip 52 as is more clear- 1 1y shown in Figure 6. Punch member "24 again moves upwardly to permit strip 52 mm fed to'the' left until end 53' thereof rests against wall 39,-

of die 39 (see Figure 1) It should be noted that,

as strip 52 reaches this position, the portion thereof which lies above surfaces 41 and 42 and; recess 40 on .die member ;39,,v already contains holes counter-sunk 55 and 57 adjacent'its opposite ends. Furthermore, hole 57 lies to the left of shear member 26 and hole 58 lies to the "right thereof, as is well shown in Figure 1. Also, as strip 52 has been fedintojthis position, a new section or portion of strip hasentered channel As strip-52 reaches this posi-r 54 so that a blank portion thereof liesbeneath recesses 46 and 47 of part 43 and in position to" be operated upon by punches 27 and 28.

Punch member 24 is now again brought down 1 to theposition. shown inFigu're 2 and xconse- .rquently shear member 25..severs the forward. (orv :"left-hand). portion of strip 52 or :that portion ly- .-ing over. surfaces "41, 42. and-recess 40 of die 'member- 39. Thus, an individual piece, general- .sly indicated at 59,-of strip 52 is formed, the right handiendof which is rounded the sameas isend .53thereof, due to the contour of wall34 ofshear member 26 (Figures 4, 5 and 6).; At thesame ltime'section 31 of part forces a middle por .tion of piece 59 into recess 40 of die member 39; and consequently-draws the opposite ends there- .of inwardly toward the center, as shown in Figure l 2, forming a U-shaped or semi-cylindricalim- 'termediate portion 62 in piece 59. Simultaneously with the forming of this portion 62 (Figures 2 and 7) in piece 59, threads 63 are formed-' 'oriswaged inthe base. thereof by the bottom surface of punch section 31 which carries threads 32 as described above, the walls of recess .40 in die 39 backing up the metal of portion 62. The position occupied by section 31 when. punch.

and28 engage strip 52 so that sections 35 and 36 thereof together with annular ridges 38 and 37 wform anew pair of holes 57 and 58 (Figures 2 and 7) together with their respective countersinks in. this. new. portion of strip 52. [Punch -member 24 now rises a11d piece .59 maybe removed from die member 39 many suitable manner as strip 52 is again fed forward or to the left, as viewed in Figure 1, until the new end 53e-thereof (see Figure 7), formed in the last operation by wall 33 of shear member 26, abuts :against wall 39 of die 39. It will be seen that the. parts are now in position for the dropping of-punch member 24 to formanother piece, similar in shape and character to piece 59, in a manner substantially similar to that described above pand to repeat the other operations above described. For purposes of convenience, I may 501311116 the feeding action of strip ,52 and-the downward move-- Iment of punchmember 24 so that a new section 10f strip will lie above surfaces 41 and 42 andin- ,dentation of die 39 each time punch member 24 comes into its closed position, as shown in ,Fig-

. ure 2. In other words, punchmember 24 may be actuated at regular intervals and the travel of .strip 52 a left-hand direction, as viewed in 1 Figures 1 and 2, may be so regulated, as to position the strip properly for each blow of the punch.

:..substantially parallelv (Figure'2) I may now in- It will be seen that I have thusfarprovided a thoroughly practical and efficient method for ..producing-and.forming a. piece of sheet metal 1 strip into individual pieces such as piece 59, best 7 shown in Figures 2 and 7. Furthermore, as the side walls of U-shaped portion 62 in piece 59 are sert within this threaded portion or channel a I thumbscrew 19 such as that described above with reference to Figure 11. Itshould' be noted that -.it-.is not necessary to thread screw 19 lengthwise into channel 62 and consequently this thumb screw, which may be produced in any suitable :mannenrmay haveformed on or secured to the 1 end thereof remote from eye 26 an abutting mem-.

4 her 2110f; any convenient character..(Figure 11).

Accordingly the next step in my method is to lay *sucha screw, preferably already carrying its abutting. member, into threaded. channel'z62, simply meshing the threads of the two parts, after which .I proceed with the final step in my method as will now be described.

. Turning now to Figure -8, there .is .shown a mechanism or tool which I may employ in the practice of this next and final stepof my method.

This .tool comprisesa frame, generally indicated, at 64, and extending downwardly from one side of which is a leg 65. The inner surface 66 of leg is arc shaped, the center of thisarc being substantially at a point 67. .The righthandside'of frame 64, as viewed. in Figure 8,.has formed there-.

in a slot68 running generally at an angle tothe vertical. The left-hand wall of slot 68 isindicated at 69 and the other wall 70 ofslot 68 runs substantially parallel to wall 69thereof'throughout a portion of the lengthof slot 68, whence itw is cut to run'directly as at 70 in an upward direction or substantially at right angles tothe ,top of frame 64. A leg 71 is pivotally mounted within slot 68 so that its inner surface 72, which takes the form of an are similar in dimensions to the arc formed by surface 66 of leg 65, mayliein substantial registry therewith and preferably upon the opposite side of center point 67, when -leg 71 rests against portion 70 of wall70.

A lug 73 extendsupwardly from and is prefer-.

. ably integral with the top side of frame 64 and a pawl 74 is pivotally mounted upon frame 64, in any convenient manner, substantially adjacent lug .73. The left-hand end ofpawl 74 is in engagement with the'right-hand' surface of lug 73, as viewed in Figure 8. Seated within. a slot '75 in the base of lug 73 and top of frame 64 is a spring 76 preferably carrying at its upper end a ball 7'7. When pawl 74 lies in a horizontalposition: as shown in Figures, its remote end 78 abuts against the inner surface of leg 71 to hold this leg against portion 70 of wall 70. However, when pawl 74 is forced upwardly about its axis, it disengages leg 71 and leaves thisleg free to swivel about its axis. 'To hold part 74 in this upper position out of engagement with leg 71, I provide an indentation 79 in the left hand end thereof which engages ball' 77 when part 74 assumes this upper position. The pressure exerted by spring 76' is sufficient to hold ball 77 inindentation 79 and thus hold part 74 in its upper position until it is forced downwardly.

It will now be seen that when locking part 74 is in its closed or horizontal position so that end 78 thereof abuts against leg 71, the inner surfaces 66 and 72 of legs 65 and'7l respectively, form a portion of a circle, the top side of which is cut off by the bottom 80 of frame 64. Extending downwardly from bottom 80 of frame 64 and substantially in line with center point 67 is a lug 81.

Two parts 82 and 83 are shaped to slidably fit within the circularspace created by legs 65 and 71,.these parts having surfaces engaging surfaces are in the position shown in Figure 8 theymay be spread with respect to each other to the position shown in Figure 10. To insert parts 82 and 83 into their operative position, as shown in Figure 8, part 74 is forced upwardly out of engagement'with leg 71 and consequently this leg is free to. swiveLjabout itstpivotalpointn ,When' leg 71 is moved outwardly so that the upper portion thereof conforms to the general direction of slot 68, parts 82 and 83 may be inserted in frame 64. Next, part 74 is moved downwardly so that end '78 thereof abuts against leg '71 to hold it rigidly against portion '70 of wall '70.

When parts Y82 and 83 are in their closed posi-,

tion, as shown'in Figure 8, and free from frame 64, the upper surfaces thereof substantially conform to the shape of piece 59 as shown in Figures 2 and 7. Thus, after screw 19 is inserted in threaded channel 62, as described above, piece .59 maybe placed upon the topsurfaces of parts.

82-and 83 and next (leg '71 being free to swivel about its pivotal point as described above) parts 82 and 83 are positioned in frame 64 as shown in Figure 8. Part '74 is now forced down to its horizontal position so that parts 82 and 83 are firmly held within frame 64 asdescribed above. It will be noted that when the parts are in this position,

.projection 81 is preferably in engagement with screw 19. Next parts 82 and 83 are spread with respect to each other, as more clearly shown in Figure 10, so that the opposite ends of piece 59 are bent upwardly to a position parallel to the bottom side 80 of frame 64 or at right angles to projection 81.

Referring to'Figure 10, it will now be seen that upon the completion of the above-described action, the opposite walls 86.an'd 87 of. portion 62 are bent or wrapped around the greatest portion of the circumference of screw 19. Next, part 74 ,(Figure is forced into its upper position or out 1 of engagement with leg -71 so that parts 82 and 83 may be removed from frame 64, thus carrying upon their top surfaces the complete Window lock, as more clearly shown in-Figure 11. By

wrapping walls 86 and 87 about such a large por-v tion of the screw 19, this screw is firmly held in this position against displacement while permitting free rotation of the screw. The metal from' which strip 52 is formed is of sufficient rigidity to hold its final shape against any of the usual forces met with in use which might tend to distort the parts to displace screw 19 therefrom. However, this metal is also soft enough to allow for an easy and efficient performance of the various steps of my method. Any spreading force such as that described above is also further prevented after my lock is installed, due to the fact that screws or other fastening means passing through holes 14 and (Figure 11) also hold piece 59 in its original shape.

It will thus be seen that I have provided a thoroughly practical and efiicient device and. method in which the several objects hereinbefore' mentioned as well as many others have been successfully accomplished and several difficulties commonly met with in manufacturing such articles are avoided in an efficient and inexpensive manner.

As many possible embodiments may be made of the mechanical features of the above invention and as the art herein described might be varied in various parts, all without departing I from the scope of the invention, it is to be underin which the remaining portions thereof extend outwardly and downwardly from the opposite sides of the open top of said channel, forming threads :in .said channel, placing a threaded bolt in and in partial registry with said threads of said channel, and,

bending said. portions upwardly to enclose. said bolt in said channel andto complete. the :registry of the threads of said bolt with the threads of said channel.

2. The herein described art which consists in,

successively piercing a metal strip with pairs of countersunk holes, cutting said strip between the holes'of each pair to form an individual piece having holes at its opposite ends, forming a chamiel .in said piece substantially .near' thee center thereof so that the remaining portions of I said piece extend outwardly and downwardly from the, open top of said 'channeL, forming threads in said channel, placinga threadedbolt in said'channel, and bending said portionsupev wardly to enclose said bolt in said channel.

3.. The herein described art which consistsin successively piercing pairs ofholes in a metal strip so that said pairs are spaced from each other, cutting said strip between the holes of:each;;

pair to form an individual piece having holes at its opposite ends, forming a channel substantially near the center of said piece so thatportions 'of' said piece extend outwardly and downwardly" y from substantially near the top of said channelsforming threads in said channeL placing, a threaded bolt in said channel, and bending said portions upwardly to enclose said bolt in' said channel. i

w 4. The herein describediart which consistsingas successively piercing pairs of holes in a metal strip so that said pairs are spaced from each other, cutting said'strip between the holes of each pair to form an individual piece of metal having holes at its'opposite ends; forming a channel substantially'near the center of said stripand running crosswise thereof so that portionsof said strip extend outwardly and downwardly from a point substantially near the top ofsaidchannel, forming threads in said channel, placing "a' threaded bolt in said channeL'and bending'said portions upwardly to enclose said bolt channel. i e

5. The herein described art which consists in successively in piercing pairs of holes in a metal:

strip so that said pairs are spaced fromeach said other, cutting said strip between the holes of each pair to form an individual piece, having holes: at its opposite ends, bending said piece to form an indentation running crosswise thereof so that portions of said piece extend outwardly and downwardly from the top of saidindentation, forming threads in said indentation, placing a threaded bolt in said indentation, andbending said portions upwardly to enclose said said indentation.

6. The herein described art which consists in bolt in forming holes in a metal strip, cutting said strip between said holes to form individual pieces'having holes at their opposite ends, forming. channels substantially near'the center of said pieces so that portions of said pieces extend-outwardlyv and downwardly from the tops of saidchannels,

swaging threads in said channels, placing threaded bolts in said channels, and bending said portions upwardly to nels. a

'7. The herein described art which .consistsin forming holes in a metal strip, cutting said strip between said holes to form individual pieces hav enclose said bolts in said chaning holes at their opposite ends, forming chan nels substantially near the center of said pieces so that portions of said pieces extend outwardly from-theopposite sides of said channels, torming threads-in the bottoms of said channels, placing threaded bolts in said channels, and bending ao said portions upwardly to enclose said bolts in said channels.

9;" The hereindescribed art which consists in successively piercing pairs of holes in a metal H strip so-that said pairs are spaced from each othe'r, cutting said strip between the holes or each pair to form an individual piece having holes substantially'at its opposite ends, bending said piece to form a channel running crosswise thereof so that portions oi said piece extend out- "wardly'"-and downwardly from said channel, swaging threads substantially in the bottom of said channel, placing-a threaded bolt in said channel, and bending said portions upwardly to enclose said bolt in said channel. 3d 10. The herein described'art which consists in successively piercing pairsof holes in a metal strip, so thatsaid pairs are spaced from each other, cutting said strip between the holes or" each pair" to form an individual piece having hi -holes at its .oppositeendsfbending said piece to forman indentation running crosswise thereof so that portions thereof extend upwardly, outwardly and thence downwardly from a point substantially near the top of said indentation, forming threads substantially near the bottom of said indentation, placing a threaded bolt in said indentation, and bending said portions upwardly so that said bolt is enclosed within said indentation.

successively forming pairs of holes in a metal strip, cutting said strip between the holes of each pair to form an individual piece having holes passing through its opposite ends, forming a channel in said strip so that portions of said piece form flanges extending outwardly and downwardly from a point substantially near the top of said channel, forming threads in said channel, placing a threaded bolt in said channel, and bending saidportions upwardly to a plane substantially at right angles to a vertical plane passing through the axis of said bolt.

12. The herein described art which consists in piercing a metal strip to form holes, cutting said strip between said holes to form individual pieces having holes at theiropposite ends, forming indentations in said pieces and running crosswise thereof so that portions of said pieces extend outwardly and downwardly from a point substantially near the tops of said indentations, swaging threads in said indentations, placing screws in said indentations, and bending said portions upwardly to a plane substantially at right angles to a vertical plane passing through the axis of said screws.

11. The herein described art which consists in 13; The herein described art which consists in successively piercing pairs of holes in a metal stripso that said pairs are spaced fromeach other, cutting said strip between the holes of each pair to form an individual piece having holes at its opposite ends, bending saidpiece to form an indentation running crosswise thereof and substantially near the center thereof so-that portionsof said piece extend outwardly and. downwardly from a point substantially near the top of said indentation, swaging threads substantially at the bottom of said indentation, placing 7 a threaded bolt insaid indentation, and bend-' said portions upwardly to a plane substantially at right angles to a vertical plane passing through the axis of said screw.

la. The herein described art which consists in successively forming pairs of holes in a metal' strip, cutting said strip between the holes of each pair to form an individual piece having holes at its opposite ends, forming said piece into an open shape having a channel running crosswise thereof, forming threads in said channel, placing a screw in said channel, and bending the opposite ends of said piece so' thatit assumes its closed shape.

15. The herein described art which consists in piercing a metal strip so that pairs of holes are spaced from each other, cutting said strip between the holes of each pair to form an individual piece having holes at its opposite ends,

bending said piece to form an indentation running crosswise thereof so that said piece assumes its open shape, swaging threads in said indentation, inserting a'thumb screw in said indentation, and bending said piece from its opposite ends so that it closes'about said screw to assume its closed.

shape.

16. The herein described art which consists in bending a metal strap at its center portion into a' U-shapc,swaging threads in the bottom of the U- shaped portion thereof, laying a threaded screw into said U-shaped portion, and bending the side walls of the Ueshapedportion toward each other toencompass the screw by more than 17. The herein described art which consists in piercing pairs of holes at spaced intervals along a metal strap, severing the latter between the holes of the various pairs pierced therein, stamping threads crosswise of a severed portion and substantially at the center part thereof and wrapping the threaded part of said portion about a screw. l

18. A window lock comprising, in combination, a wedging member having an abutment at one end and means at the other end for rotating it and being threaded throughout its intermediate portion, and a sheet metal strap member having threads formed in a series thereof at its center, said strap member eing bent so that the threads thereof mate with said threaded wedging member throughout at least 180 of the circumference of one end and a hand grip at the other end whereby said member may be rotated, said member being threaded throughout its intermediate portion, and a support for said wedging member, said support being in the form of a sheet metal strap pro vided with means for securing it to an object, and having a substantially U-shaped portion whose bottom and sides have threads formed therein, the intermediate threaded portion of said wedging member being seated in said U-shaped portion and at least one side of said U-shaped portion being bent around said threaded intermediate portion so that the threads of the U- shaped portion mate with the threads of the wedging member throughout at least 180 of the circumference of the latter.

21. In the art of making window locks, the process which consists in simultaneously bending an intermediate portion of a strap of metal into U-shape and stamping threads in the bottom and sides of the U-shaped portion, resting a screw in said U-shaped portion with the threads of the screw mating with the stamped threads in the bottom of said U-shaped portion, and bending at least one side of said U-shaped portion about the screw so that the stamped threads in the said side mate with the threads of the screw.

22. In .the art of making window locks, the process which consists in intermittently advancing a metal strap and simultaneously, during a halting advancing movement of the strap, piercing apair of relatively closely spaced holes in the strap at one point in its length and severing the strap intermediate of a pair of holes previously pierced and bending the severed strap into a U- shaped portion intermediate 01' its length.

23. In the art of making window locks, the process which consists in intermittently advancing a metal strap and simultaneously, during a halting advancing movement of the strap, piercing a'pair of relatively closely spaced holes in the strap at one point in its length and severing} the strap intermediate of a pair of holes previous; ly pierced and in one operation bending a central, portion of the severed strap into-a U-shapewhile.

stamping threads in the U-shaped portion. 6"

24. The herein described art which consists in a intermittently advancing a metal strap and siinultaneously, during a halting advancing movement, of the strap, piercing a pair of'relatively closely spaced holes in the strapat one point in its length 10.

and severing the strap intermediate of a pair of holes previously pierced and in one operation bending'the severed strap into a U -shape intermediate its ends while stampingthreads in the U-shaped portion and bending each of theztwodd i remaining end parts of thesevered strapeach 4i into two portions, one portion at an acute angle to a side of the U-shaped portion andthe other portion at an obtuse angle to the said one portion.

25. The hereindescribed art which consistsiin 20,

intermittently advancing a metal strap andsixmilQ-L taneously, during a halting advancing movement of the strap, piercing a pair of relatively closely spaced holesin the strap' at one point rinlits length and severing the strap intermediate Q 3: 5;- 7

pair of holes previously pierced and in one opera,- 2. tion bending the severed strap into a- U-shape intermediate its ends while stamping-threads in the U-shaped portion and bending eachfof. the

two remaining end parts of the severed strap eac hf30;

into two portions, oneportion at an, acuteangle to aside of the U-shaped portiontand the "other portion at an obtuse angle tothe said oneportion; then inserting a sorew'in sai d-"U shaped portion with the threads of the screw mating with 35f 1 the threads stamped in the U-shapedportion;= i and bending-the sides of the U-shaped portion about the screw to bringthe said other-portionsl of the end parts of the severed strapinto sub-L stantially the same plane.

HENRY F

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