US1748172A - Typewriting machine - Google Patents

Description

Feb. 25, 1939. K GQMMEL TYPEWRITING MACHINE 3 Sheets-Sheet 1 Filed Jan. ,27. 1927 Feb. 25, 1930. KGOMMEL TYPEWRITING MACHINE 5 Sheets-Sheet 2 /n ven/'or Har/ @0mm el F'ild Jan. 27. 1927 X N E@ Feb. 25, 1930. K. .GOMMEL 1,748,172

TY1=EWRIT1NG MACHINE Filed Jain. 27, 1927 3 Sheets-Sheet 5 A lnvenor: V AW T/ har/ Gomme/ Patented Feb. 25, 19360l PATENT OFFICE KARL GOMMEL, OF BERLIN, GERMANY TYPEWRITING MACHINE Application led January 27, 1927, Serial No. 163,999, and in Germany January 30, 1926.

My invention relates to type writing ma? moving an index across a type board and is brought to bear against the paper on the platen.

It is an object of my invention to provide a machine in which simple and reliable ineans are provided for moving the type cylinder against the platen after it has been sct for the desired type, and to this cnd I arrange the type board to pivot about a pin which extends in parallel to the axis of the'type cylinder.

In the drawings affixed to this specification and forming part thereof a device embodying my invention is illustrated diagrammatically by way of example.

In the drawings Fig. 1 is a plan view of the complete machine,

Fig. 2 is a plan view of the end to which the type board is pivoted, with the type board removed,

Fig. 3 is an elevation of the machine, vwith the front cover plate removed,

Figs. 4, 5, and 6 are sections on the corresponding lines in Fig. 1,

Fig. 7 is an elevation of the platen viewed in the direction of the arrow 7 in Fig. 1,

Figs. 8 to 13 are detail views indicating the two checks for limiting the motion of the platen,

Fig. 14 is a detail view corresponding to Fig. 3 and showing the spacing key and its accessories separately.

Figs. 15 and 16 are sections on the corresponding'lines in Fig. 1,

Figs. `17 and 18 are a plan view and an elevation, respectively, on a larger scale, showing the end of the index,

, Fig. 19 is a plan view showing the arrangement ofthe types on the type board, Fig. 20 is a plan view and i Fig. 21 is an end elevation of an exchangeable type board, l Fig. 22 is a' section on the line XXII- XXII in Fig. 1, Figs. 23 and 24 are an'elevation and a plan between corresponding jibs 9, 9 on the base hand wheel, the pitch of the flutes correspondin slides 20, 20 at both ends o the platen, one

view, respectively, of the mechanism for setting the type cylinder,

Fig. 25 Ais a plan view of the platen,

Fig. 26 isla plan view, and

Fig. 27 is an elevation of an appliance for typing music, in section on lthe line XXVII- X VII in Fig. 26.

Referring now to the drawings, 1 is the base plate of the machine,2 is a vertical web at the right-hand end of the plate, 3 is a pin inserted in an eye 2 at the upper end of the web 2, 4 is a spacing key and 5 is a type board, both pivotally carried on the pin 3, 5 is an extension at the lefthand end of the type board, and 6 is a pin securedin this extension, on which pin the type cylinder 7 is rotatably carried on a sleeve 84 which is slidably held on the pin 6 but does not rotate while the type cylinder is free to rotate on the sleeve 84. Preferably the space inter- 7 mediate the type board 5 and the base plate 1 is covered by a detachable front plate 8.

. The platen carriage 10 is preferably dovetailed at the base and adapted to be inserted plate 1, as best seen in Fig.' 22. 11 and 12 are uprights at the end of the carriage 10, and 13 is the shaft of the platen 14 which is vcarried in the uprights 11 and '12. The platen 14 is made of rubber or other suitable vmaterial with a central tube in which the shaft 13 is seated, and two end discs 15 and 16, the lefthand end disc 16 being a fluted ing to the spacing of the lines. A spring 85 pawl ,17 is arranged below the platen 14 in a recess 18 of the carriage 10 and adapted to engage the flutes in the end plate 16. The platen is fed by hand but obviously the usual lever and pawl mechanism might be provided instead.

19 is the impression roller which is carried on pins 22 at both ends, `the ins being held of which slides is shown in Fig.`5. lMotion is imparted to the slides through the medium of levers 23 and 24 which are fulcrumed on pins 22 of the carriage 10. The ends of the levers are provided with inclined faces 26 so that they will be held in a inal position after having displaced'the slides. 25 is a stay connecting'the' two levers 23, 24 and serving for guiding the paper which comes from the platen 14.

27 is a cover plate for the platen 14 which may be graduated as indicated at 27 28 are tongues cut from the cover platel 27 at both ends and secured to a rack 31 by means of screws 29. the racki'n turn being held by lugs 10 which are secured to or integral with the carriage 10. 30 is an extension at the lower end of each tongue 28 which exerts pressure on the end of the corresponding slide 20, forcing the roller 19 against the paper or the platen and holding the levers 23 and 24 with their stay 25 .in a definite position, that is, in the vertical position shown in Fig. 5 or in the inclined position in which their faces 26 engage the ends of the slides 20.

32 and 33 are two margin checks which are adapted to be displaced on the rack 31. As will appear from Figs. 8 to 13, the checks are substantially rectangular parts bent from a strip of plate so that a gap is formed between one of their vertical webs 32" and the adjacent horizontal ange 34 and this web engages the corresponding face of the rack under resilient pressure. In order to prevent too high frictional resistance between the face of the rack and the web, the web may be partly cut away as indicated at 32" in Fig. 8. The check 32 is provided with a vertical tooth 34 at one end and the cheek 33 is provided with an inclined tooth at its opposite end. as the tooth 34 engages the vertical faces and the tooth 35 engages the inclined faces of the teeth in the rack 31. Sutlicient space is provided between the flange 34' and the lower edgeof the rack 31 to permit lifting of the teeth 34 or 35-out of the teeth of the rack when it is desired to displace the checks on the rack. Preferably a vertical Shorter tooth 36 is provided at the end of the check 33 which is opposite the tooth '35, this additional tooth serving to keep the check engaged with the rack in case the inclined faces of the teeth should force the tooth 35V out of the teeth of the rack. 37 is a lug depending from the lower flange of the check 33 for operating` the rod 38 of the hammer 39 for the bell 40.

42 is a spring secured on the base plate 1 at one end and to an arm 41 dependingr from the spacing key-4, 43 is a pull bar which is pivoted tothe arm 41 at one end and'engages the teeth of the rack 31 by means of a single tooth 44. Normally the tooth 44 is engaging the rack. lrVhen the spacing key 4 is depressed y the tooth 44 moves through the distance of one pitch on the rack 31 fram. the left in Fig. 3 to the right and engages behind the vertical face of the following tooth. When the spacing key is released the spring 42 will return the bar 43 to its initial position so that bv engagement of thetooth 44 with the vertical flange the platen is fed through one pitch.

Abutments (not shown) are provided for limiting the stroke of the spacing key to prevent overrunning of the platen.

45 is a lateral projection on the frame of vthe type board which is vadapted to engage the spacing key 4 when the frame is depressed so that the spacing key 4 is operated, and the platen 14 is fed forward through one pitch, as often as the frame is depressed.

When it is desired to return the platen to its initial position at the right of the machine the spacing key 4\is depressed until the end of the bar 43 abuts against the wall 2. The end is inclined so that the end of the bar 43 is raised out of the teeth of the rack 31, when its end is thus abutting.

A spring 46 which engages below the ,pin

47 returns the type board 5 to its normal position after it has been depressed, its upward motion being limitedby a curved slot 48 in the front plate8, as shown in dot-and-dash lines in Fig. 3.

The ribbon .spools are free to rotate on a pin 60 which is adapted to be displaced 1n parallel in a hole in the front plate 8 and a corresponding hole in a web 61 which extends Vin'parallel to the cover plate and at rlght angles to the transverse web 2. Each spool is provided with end plates 49 and 50 and 65 and 66. The inner end plates' 65 and 66 are provided with ratchet vteeth on .their outer rims and adapted to cooperate with a pair of pawls 67 and 103. A handle 62 is secured on operative position with respect to the pawl.l

The pawl 67 is secured on a lug depending from the type board I5 by means of a screw 68 and serves for rotating thatplate 65 or 66 which is placed opposite it by axlal. d1splacement of the pin 60,- as will be described, and the pawl 103 merely serves for holding the plate in position. 104 is a screw by which the pawl 103 is` attached to the base plate '1. It will be understood that one of the plates or 66 will be turned as often as the type board 5 is depressed.

Any suitable means may be provided for holding the pin 60 in position, for instance,

it may be provided with a cam 63 at one end,

which extends into a slot in a web 61. The cam has two shoulders whichare alternately engaged by a U-shaped spring 64 housed in a position in which the pin has been pushed home by its handle 62, causing'the plate 65 to be placed in cooperative position with the pawls. l

The ribbon 71 is guided by means of a wire 69 which is secured to the front plate 8 as will, appear from Fig. 16, and is curved into the' shape of the letter W. The Aribbon is looped across a guide 70 at the end of a curved arm 70 which is secured to the type board 5. It will appear that the ribbon moves upwards 4at the guide 70 and is returned through the wire69 in stretched condition, passing immediately below the type cylinder 7. This one-sided guiding of the ribbon is very favorable to the visibility of the written matter as the ribbon vonly passes across the paper at the point where the impression is made. l The proper position of the type cylinder is ensured by the cooperation of a rack 72 with V-shaped teeth, a roof-shaped web 7 3 and a star wheel 74 on the type cylinder, as best seen in Fig. 22. 105 is a lug secured on the sleeve 84 which, as'mentioned, is free to slide on the pin 6 but does not partake in the rotation of the type cylinder. A pinion 75 is inserted between the lug 105 and the star wheel 74 and a rack 76 is adapted to mesh with the pinion so as to rotate the type wheel. The setting of the type wheel is effected by means of the index 77 which is pivotally carried at the outer end of a spring 80, the other end of which is secured on a bracket projecting downwards through an opening in the frame of the type board 5, which bracket 80 is, in turn, connected with a rear ward extension 76 of the rack 76. The rack is free to reciprocate in a slot of a slide 79 which is guided in a corresponding preferably dovetailed slot 79 in the lower faceof the type board 5. 7 82L and 78b are a vertical and a horizontal ear, respectively, for guiding the rack 76 in the vicinity of the lug 105, both ears being integral with a part 78 con necting the slide 79 withthe pin 6 through the medium of an eye 106,'-which constitutes an extension of the lug 105 and is placed in the sleeve 84. The handle 77 of the index is adapted to pivot about apin 81 at the outer end of the spring 80 and-is free to-turn about its pinthrough a 'certain angle which is limited by an abutment 80 on the spring 80. 82 is a h'emispherieal rojection on the lower face of the handle $7 `adapted to engage corresponding hemisphericaldepressions in the type board, as best seen 1n Fig." 19.

As a rule the index will be in the position indicated in Fig. 1 in which its heinispherical projection 82 is not engaging any of the def pressions in the ty'pe board. When the hemi- 'spherical projection is placed in one of the depressions the type cylinder7 is displaced i 'and rotatedJ on its pin 6 into the kposltion carriage at the other.

'letter moves into the position of the corresponding small letter. Similarly, those types may be exchanged, which normally require exchanging, as for instance a bracket or the like.

The front end of the hollow type cylinder 7 is supported on a disc'85 which is secured to the rear face of the star wheel 74 or integral with the star wheel, as shown in Fig. 24, and 85 is a tooth or pin projecting from the perimeter of the disc 85 and extending into a slot at the end of the type cylinder, so that the type cylinder is positively connected with the star wheel 74. A nut 87 `on the rear end of the sleeve 84 holds the cylinder 7 in position, so that it may be exchanged after thev nut' has been unscrewed. If desired, the key board may abe exchanged as Well or. preferably a supplementary key board is placedon the existing one. Such a key board 88 is shown in Figs. 2O and 21. Its jibs 89 hold it in position on the key board frame. Longitudinal vdisplacement is prevented by pins 89 or the like engaging recesses 89 in the rim of the key board frame. The adaptability of the machine is practically universal, due tothe exchangcability not only of the type cylinder but also of the key board.

When the type board 5 is depressed the star wheel 74 will enter one of the grooves in the rack 72 and at the same time the body of the web 73 will enter the space intermediate two of the V-sh'aped teeth of the star wheel 74 `with its ridge. This causes the type cylinder to be adjusted axially as Well as radially. An additional axial adjustment is effected by the lug 105 entering another of the grooves yin the rack. The cooperation of the parts is facilitated by the inclined faces with which vthey engage before being finally seated.

. Referring now to Figs. 26 and 27, 90'is a gear wheel at the end of the platen 14 which is opposite the handle 16 and 91 is a pinion ou a square shaft 92v which is carried in parallel to the platen 14 in the carriage 10. The gear wheel isfree to rotate on the shaft 13 ofthe platen but is under the action of a spiral spring which is sepcured to the .boss of the gear wheel at one end, and to the platen 93 is a lever the end of which is seated on the shaft 92 by means of l a boss 93- with a square hole therein. A handle 95 is pivoted .to the lever at 94. The lever 93 is held against displacement in parallel with the platen 14l byv abutments 96 llO engaging both ends of the boss 93 and secured to the base plate 1. 97 is a .sector which is also secured to the base plate l or may be integral therewith. The end of the sector which is facing the handle is provided With V-shaped teeth 98 which are adapted to be engaged by a lug 99 on the handle 95. The spring 100 tends to rotate the platen and the shaft 92 through the medium of the gearing 90, 91, sov as to move the lever 93 and its handle 95 into their highest position which is limited by an abutment 95 at the sector 97.

101 isa ball inserted in a bore of the gear Wheel 90, 102 is a spring exerting axial pressure on the spring and tending to force it into hemispherical depressions 101 in the face of the platen 14.

By turning the handle 16, which in this case is not provided With the pawl 17 as shown in Fig. 4, it is possible to vary the relative posi'- tion of the platen and the gear Wheel 90 when the lever 93 is on the abutment 95 preventing rotation of the shaft 9:2v and consequently of the gear Wheel 90.

The pitch of the hemispherical depressions lOl corresponds to the pitch of the lilies, so that it is possible to Write letters or the words to a tune by placing a type cylinder on the pin 6 instead of a music cylinder. When writing music, however, the ball 101 and its cooperating depressions 101 serve for setting t-he platen'to systems of music lines. When the platen has been adjusted for a system of music lines the ball 101 serves as an abutment for the gear Wheel 90 for setting the pitch of the music by means of the lever 93, its handle 95 and the teeth 98 of the sector 97. The teeth 98 are of suoli size that When the handle 95 is displaced from one tooth space to the next the platen is rotated and the paper is displaced through such a distance that the note to be Written is printed on the paper only for a single graduation of higher or lower pitch. By inserting the tooth 99 in a tooth space of the sector 97 theplaten 14 with the paper thereon is adjusted for a line or a space intermediate two lines and held in this position, and by depressing the index handle 77 the note is'printed on the paper as Adescribed with reference to the typewriting machine. When a system has been completed the platen is fed to the next system by rotating the handle 16.

My novel type Writing machine is also applicable to Writing in which the Words are not placed inhorizontal but in vertical lines, for instancefChinese writing. In this case a type cylinder isprovided in which the types are not arranged in parallel to a generatrix of the type cylinder but to a tangent, and preferably the types on the type board are arranged in'parallel to the platen.

As mentioned, the type cylinder and the type board may be exchangeable and therefore it is possible to alternately print Gel'- man and Chinese, or any other types, with the same machine.

It is not absolutely indispensable that the axis about which the type board and the index are pivoting should extend in parallel to the axis of the type cylinder as the pivotal axis of these parts might'also belarranged in parallel to the axis of the platen, or in any other position, but parallel arrangement of the pivotal axis and the axis ofthe type cylinder is preferable.

I wish it to be'understood that I do not desire to be limited to the exact details of construction shown and desicribed for obvious modifications Will occur to a person skilled in the art.

I claimz- 1. A typewriting machine comprising a frame, a type support, a pivot on said frame about which said type support is adapted to rock, a type cylinder rotatably carried on said support with its axis extending in parallel to said pivot, a type boardenv said support arranged intermediate said cylinder and said pivot, an index adapted to be displaced with respect to said type board and mechanism operatively connected With said index for setting said type cylinder in conformity with' the position of said index,

2. A typewriting machine comprising a frame, a type support, a pivot on said frame about which said type support is adapted to rock, a ltype cylinder rotatably carried on said support With its axis extending in parallel to said pivot, a type board on said support arranged intermediate saidv cylinder and said pivot, an index adapted to be displaced With respect to said type board, a pinion on said type cylinder, ar rack operatively connected with said index and meshing 'with said pinion, a guide or support in which said rack is carried to slide, and means for displacing said rack on said board in parallel to the axis of said type cylinder. y

A typewriting machine comprising a frame, a type support, a pivot on said frame about which -said type support is adapted to rock, a type cylinder rotatably carried on said support with its laxis extending in parallel to said pivot, a type board on said support arranged intermediate said cylinder` and said pivot, an index adapted to be displaced with respect to said type board, mechanism operatively connected with said index for setting said type cylinder in conformity With the position of said index, a platen carriage and platen on said frame, a graduated cover platel for' said platenand springs constituted by tongues cut from said cover plate for holding it engaged with said platen. v

4. A typewriting machine comprising a frame, a type support7 a pivot on said frame about which said type support is adapted to rock, a type cylinder rotatably carried on said support with its axis extending in parallel respect to said type board, mechanism operatively connected with said index for setting sal/d type cylinder in conformity with the position of said index, a platen carriage and platen on said frame, a graduated cover plate for y said, platen, springs constituted by tongues cut from said cover plate for holding it engaged with said platen, extensions on said sprin s, and an impression roller adapted to e forced against said platen by said extensions.

5. A typewriting machine comprising a frame, a type support, a pivot on said frame about which said type support is adapted to rock, a type cylinder rotatably carried on said support with its axis extending in parallel to said pivot, a ty e board on said support arranged interme iate said cylinder and said pivot, an index adapted to be displaced with respect to said type board, mechanism operatively connected with said index for setting said' ty e cylinder in conformity with the position o said index, a platen carriage and platen on said frame, a graduated' cover plate for said platen, springs constituted by tongues cut from said cover plate for holding it engaged with said platen, extensions on said springs, slides in said platen carriage adapted to be displaced by, said extensions, an impression roller carried on said slides, and means acting on said slides for moving them against the action of said extensions.

6. A typewriting machine comprising a frame, a type support, a pivot on said vframe about which said type support is adapted to rock, a type'cylinder rotatably carried on said support with its axis extending in parallel to said pivot, a type board on said support arranged intermediate said cylinder and said pivot, said support defining an opening intermediate said pivot and said board, ribbon spools arran ed on said frame below said opening, an index adapted to be displaced With respect to said type board, and mecha` nism operatively connected with said yindex for setting said ty e cylinder in conformity with the position ci) said index. d

7. A typewriting machine comprising a frame, a type su port, a pivot on said frame about which sai type support is adapted to rock, a type cylinder rotatably carried on said support with its axis extending in par- .allel to said pivot, a type board on said support arranged intermediate said cylinder and said pivot, said sup ort defining an opening intermediate said pivot and said board, r1bbon spools arranged on said frame below said opening, end plates on said ribbon spools, ratchet teeth on the edges of those end plates which face each other, a pawll operatively connected with said type support and adapted to engage said teeth, an index adapted to be displaced with respect to said type board, and mechanism operatively connected with said index for setting said type cylinder in conformity with the position of said index.

8. A typewriting machine comprising a frame, a type support, a pivot on said frame about which said type support is adapted tov rock, a type cylin der rotatably carried on said support with its axis extending in parallel to said pivot, a type board on said support arranged` intermediate saidcylinder and said pivot, said support defining an opening intermediate said pivot and said board, ribbon spools arranged on said frame -beloW said opening, a pin on which said ribbon spools are carried, means for displacing said pin axially, end plates on said ribbon spools, ratchet teeth on the edges of those end plates which face each other, a pawl operatively connected with said type support and adapted -to engage the teeth of that end plate which is being' presented to it upon displacement of said pin, an index adapted to be displaced with respect to said type board, and mechanism operatively connected with said index for setting said type cylinder in conformity with the position of said index.

9. A typewriting machine comprising a frame, a type support, a pivot on said frame about which said type support is adapted to rock, a type cylinder rotatably carried on said support with its axis extending in parallel to said pivot, a type board on saidsupport arranged intermediate said cylinder and saidv pivot, said support definin an opening intermediate said pivot and sai board, ribbon spools arranged on said frame below said opening, 'means for guiding the ribbon on the spools in the shape of a loop with substantially parallel reaches, an index adapted to be displaced With respect to said type board, and mechanism operativelyconnected with said 'index for setting saidtype cylinder in conformity with the position of said index.

10. A.typewriting machine comprising a frame, a type support, a pivot on said frame about Which said type support is adapted to rock', a type cylinder rotatably carried 0n said support with its axis extending in par allel to said pivot, a, type board on sad'support arranged intermediate said cylinder and said pivot, an index adapted to be displaced with respect to said type board, mechanism operatively connected with said index for setting said type cylinder in conformity with the position of said index, a platen carriage on said frame, a rack on said carriage, a spacing key adapted to rock about said pivot, a tooth operatively connected with said spacing key, and adapted to engage said rack, and means operatively connecting said key and said ty e support.

11. typewriting machine comprising a frame, a'type support, a'pivot on sa1d frame about which said type supportis adapted to rock, a type cylinderrotatably carried on said support with its axis extending in parallel to said pivot, a type board on said support arranged intermediate said cylinder and said support, an index adapted to be displaced With respect to said type board, said index having a spring and a pin adapted to engage depressions in the type board, and means for displacing said pin With respectto said spring, and mechanism operatively connected with said index for setting said type cylinder in conformity with the positionof said inde-X.

12. A typewriting machine comprising a frame, a type support, a pivot on said frame aboutwhich said type support is adapted to rock, a type cylinder rotatably carried on said support with its axis extending in parallel to said pivot, a type board on said support arranged intermediate said cylinder and said support, an index adapted to be displacedwith respect to said type board, said index having a spring, a pin adapted to engage depressions in the type board, a handle on said spring adapted to pivot about a pin thereon, and mechanism operatively connected with said index for setting said type cylinder in conformity with the position ofsaid index.

13. .A typewriting machine comprising a frame, a type support, a pivot on said frame about which said type support is'adapted to rock, a type cylinder rotatably carried on said support with its axis extending in parallel to said pivot, a type board on said supy port arranged intermediate said cylinder and said pivot, an index adapted to be displaced with respect to said type board, mechanism operatively connected with said index for setting said type cylinder in conformity with the position of said index, a platen carriage on said frame, a spacing key adapted to rock about said pivot and o eratively connected with said carriage, an means operatively connecting said type support and said spacing key so that the spacing key partakes in the downward motion ofsaid type support.

14. A typewriting machine comprising a frame, a type sup-port, a pivot on said frame about whichsaid type support is adapted to rock, a type cylinder rotatably carried on' said support with its axis extending in parallel to said pivot, a type board on said support arranged intermediate said cylinder and said pivot, an index adapted to be displaced with respect to said type board, mechanismy operatively connected with said index for settlng said type cylinder in conformity with the position of said index, a platen `carriage on said frame, a rack on said carriage,` a margln check on said rack,'resilient means for voperatively connecting said check and said rack, and a sto on said check permitting movementv of said check tramsversely so as to disengage said check from the teeth of said rack.

15. A typewriting machine comprising a frame, a type board adapted to be displaced With respect to said frame, a pinon said frame, a sleeve adapted to be displaced on

Images