US1701294A - Farm gate - Google Patents

Description

Feb. 5,v` 1929.

M. L. BRocHHAusEN FARM GATE Filed Aug. 16, 1927 2 Sheets-Sheet 1 Q H l Qld 2 :x4/ m 2 mm1 8r|ll ull .Ulli w .Io. I m: im WIW nul HM ,.h .b OvHI 7 S HM 9M ./U/.,/. u o 7 u /l Il j. 7 Q l .a 0 M ,w M. .2 .WWII j lili ln 5 3 3l. ...nw .V F mw MMI) 3 Hou m--. .w .wl ml m1 l w m.. I l. a. l v 3l r 2 f 1 El@ Feb. 5, 1929. 1,701,294 M. L. BROCHHAUSVEN l FARM GATE Filed Aug. 16. 1927 2 Sheets-Sheet 2 to open position.`

Patented Feb. s, 1929.

yMIATHIAS LEONARD BBOCHHAUSEN, OF ALBANY, YORK.

FARM:y GATE.

VApplication i'lledAugust 16, 1927. Serial No. 213,230.

This invention relates to self-opening farm gates of the kind which are adapted to open automatically when a vehicle approaches the gate and to close automatically when the vehicle has passed through the gate.

The invention has for one of its objects a centrally pivoted gate which may be caused toopen and remain open automatically when a vehicle wheel isin a predetermined area of the roadway and to close automatically when the vehicle wheel leaves such area. To this end,.one arm of a lever pivoted beneath the. gate is adapted to be depressed by a track with which a wheel of a vehicle contacts,

thereby elevating the other arm of the lever which causes the elevation of a pivot upon which the gate is carried. Cam `surfaces are provided to cause the swinging ofl the' gate about the pivot on an arc of a circle and the gate is caused toremain in open position at right anglesl to its normally closed position so long asthe vehicle wheel contacts with the track by cooperating surfaces on the gateand its pivot. The gate is closed by instrumentalities affected by the weight of the gate when not overbalanced by the weight of a vehicle onthe track. c

A furthervobject of the invention is the retention of the gate in closed'position by lock-r ing devices whichA will be automatically re-y leased when the vehicle wheel passes ontothe track. Accordingly, devices on the gate and on a relatively'stationary portion of the structure are adapted to interengage when the gate" is in closed position, but to disengage when.

the gate pivot is raised by the said levers pre-` paratory to veffecting the rotation of the vgate A further ob]ect of the invention is the provision of means for manually opening a portion of the gate to permit a'pedestrian to `pass. To this end a portion of the gate is hinged with respect to thev remainder of the gate and manually releasable devices are providedto normally maintain the hinged portionin rig-idv way 14 and may extend slightly above the upv per webs ofthe channels 16. f i Y relation with the remainderof the gate.

The invention also seeks a gate'structure and gate operating means which shall be practical from the standpoint of ease and cheapness of manufacture and durabilityy and con.- `Veni-ence in use.

These and other and the means-for their attainment will be more apparent `from the following detailed description taken in connection with the ac-I 'objects of the invention' companying drawings lustrating a pre-l ferred 'embodiment thereof, inv which Figure 1 is a view in front elevation and partly in section showing the gate according to this invention and the'operating mechanism therefor. f F igure` 2 is aplan view of the structure illustrated'in Figure 1. V

F igure' 3 `is a fragmentary view in side elevationv of the gate pivot and gate rotating mechanism in gate closed position, parts being removed in the interest of clearn'ess.

.Figure 4'is ra section on the line 4 4 of Figy ure 3. f y

Figure 5 is a View infront'elevation and partly in section on the line 5 5 of Figure 3. Figure 6 is a front elevational View similar to Figure 3 but showing the mechanism when the gate is inopen position.y f

Figure 7 is a side elevational view of the mechanism in the position shown in Figure 6.

` Figure 8 is a view similar to Figure 3 but `posts l15,and in prolongation ofthefence 12',

thatis, transverse to the roadway 14, there is disposed a pair of channels 16, 16, of any suitable material, preferably sufficiently below the surfacefof the roadway to permit the concealment of all parts of the gate actuating mechanism below the roadV surface 14. These channels 16 form between thema slot or space 17 for transversely extending operating 1evers 18, which are pivoted as at 19 to the channels 16and are so disposed that the ends 20 of the longer arms'are proximate one another l at the centerof the roadway, while they ends 21 of the shorter arms are at thesides of the roadioo v Extendingin opposite'directions adj acentL the margins of the roadway 14 are runways a' vor tracks 23 for the off wheel or wheels of a conveyance, not shown. These tracks 23 extend, one on eachside of the road, in a direction opposite to that in which the gate 13 swings horizontally about its midpoint so that awheel ofy a Vehicle approaching the 11ov l gate and keeping to the right will ride up on to the track and depress it. The outer end of the track 23 rests on the surface of roadway 14 while the track terminates proximate the gate and rests, in elevated position, upon a plunger 24. This plunger 24 may take the kform of a section of an I beam, reciprocating in a guide 25, within which the end of the track also is guided. lVhen the end of the track 23 is depressed by the weight of a vehicle, the plunger 24 depresses the end 21. of lever 18 and thereby elevates end 20 at the center of the roadway. It is the elevation of this end and the contacting thereof with gate rotating mechanism which effects the opening of the gate. Y

At its midpoint the gate 13 is formed with a tubular pivot bearing member 27 which reciprocates on and rotates upon a central pivot 28 (Figure Pivot 28 and tubular bearing member 27 extend below the surface of the roadway into a chamber or space 22 between a surface plate 14 and the top flanges 33 of the channels. At its lower end the gate tube 27 is formed with or is carried on a wedge shaped cam 29 which rests on and rotates on a cam surface formed on a cylindrical base cam 30. Cain 30 is preferably formed with a flange 31 by which it may be secured, as by the bolts 32, to the top flanges 33 of the channels 16.

The pivot 28 terminates in a lever bearing member' 34 which is preferably rectangular in cross section and is Aformed at its lower end with a rectangular plate slightly larger in its transverse dimensions than the member 34 and which serves as the bearing with which the lever ends 20 `engage and by which the pivot 28-is raised. Y

Centrally the channels 16 are slotted vertically, as at 36, to receive the squared lever bearing member 34, 35 of the central pivot Vmember 28. The upper end or top of this` lever bearing member 35 angularly notched, as at 37 on a` diagonal thereof and in 'a direction transverse to the plane of the channels 16 as shown clearly in Figures 5 and 6. This notched top surface may be considered as a movable camming surface.

The cam base 30 is formed with four cam surfaces 40, 41, 42 Vand 43 comprising oppositely disposed elevated points or dwells 46 and 47 defined by the descending cam surfaces 41 and 43 and the asceiiding cam surfaces 40 -and 42, respectively.

The elevated points 44 and 45 are diagonally opposite one another and lie in a vertical plane A A through. the vertical axis of the pivot but at an angle to the vertical plane B-B transverse to the channels 16 and to the plane including the V-shaped notch (see Figure 4). Considering the desired direction of rotation of the gate as counterclockwise, as viewed from above, in order that its end may rotate away from an apvertical plane Ce-C but at an angle in ad-v vance or counterclockwise of the median plane D-D of the channels 16.

The gate 13 so mounted on the bearing tube 27 as to lie in the longitudinal plane y D-l) when the tracks 23 are not depressed. In this situation, of course, the bearing 34, 35, due to its own weight and to the weight of the gate, is at the lowermost'point, thereby depressing the ends of the levers and permitting the lowering of the wedge which strikes the cani-surfaces in the plane BhBand is directed downwardly down the inclined cam surfaces 41 and 43 to come to rest finally in thelow points 46 and 47. At this time high points ofthe V slot 37 are below'the lowest edge 29 of the wedge 29 as shown in Figure 5.

When now the gate is `to be opened by an approaching vehicle, the vehicle, keeping to the right of roadway 14, is so directed that its off wheel or wheels contacts with the track 23 and the weight of the vehicle causes a depression of the plunger 24 and end 21 of lever 18 and thereby an elevation of end 20 of the lever 18. This elevation of end 20 raises the bearing member 34, 35 so that diagonally opposite side edges of the V slot 37 contact with the edge of the wedge 29 and raise the same. The tendency of the wedge to slide down the edge of the V slot is opposed by the ascending cams 40 and 42 and as the V slot continues to rise the travel of the wedge against thecam surface 40 and 42 causes said cam to rotate until it rests in thev' slot and the edge ofthe cam and hence the plane of the gate Alies in the transverse plane B-B in the median line of the roadway. This rotation of the wedge obviouslycarries the gate with it on the arc of a circle.

i/Jhen the vehicle wheel passes olf the track and no further weight is placed on the Vend 21 of lever 18 .the weightvof the gate lowers the pivot bearing member 34, 35 so that the wedge 29 is again permitted to contact with the cam base 30. This contact occurs on the line B-B (Figure 4) on the descending cam surfaces 41 and 43 and as the wedge edge 29 rides thereover to rest in the low points 44 and 45 the gate is swung to closed position, Figure 5. l

Obviously, it is desirable to lock the gate in closed position to prevent'accidental opening, as by an animal pushing against the gate. To this end the wedge 29 may be formed with a downwardly extending lug` 50 in prolongation of the edge`29. This lug 50 is adapted to lit i nto a recess 51 formed at the low point or `points 46 and/or 47 of the cam surfaces -so that when the gate is in closed position the lugs in the recesses prevent rotation ofthe gate to open or partially open position eX- cept when the tubular bearing` member 27 is -raised through the instrumentalities of the l pivot 28 and tracks 23.

It is also proposed according to this invention to provide for the passage of a pedestrian through the gatewithout necessitat-` ing the use of the gate rotating mechanism. Accordingly, one or both wings 13 of the gate are pivotally or hingedly mounted on the pivot bearing tube 27^as att-53 and, preferably, at the top the wing is providedl with an arm 54 releasably secured, as by the pin' 55, to an apertured lug 56 carried with the tube 27. i lVhen the arm 54 is joined to the lug 5G bythe pin 55 the gate wing is rigidmatically opened when a vehicle approaches the same over a specified area and which will automatically close after the vehicle has passedtherethrough. If desired, the gate may be so constructed as to effect an autof matic latching and unlatching of the gate in closed position. By a simple manually operable device the gate may be opened, at least in part, for the passage of a pedestrian.

Various modifications will occur tovthos'e skilled in the art in the composition and configuration of the component elements by which this farm gate is shown to be realized and no limitation isintendedby the phraseology of the foregoing description or illustrations in the accompanying drawingscxcept as set forth in the appended claims. What I claim is f Il. A farm gate comprising, in combina tion, a centrally pivoted gate and means to cause said gate to open includinga track adjacent an edge of the roadway, a lever pivoted below the surface of the roadway and having one end beneath the track and its other end beneath the gate pivot, and means to close the gate dependent upon the weight thereof.

Q.. A farm gate comprising, in combinay tion, a tubular pivot bearing carried with the gate, a pivot upon which the bearing reciprocates and rotates, a wedge carried with the bearing, a circular camwith which the wedge engages and means to elevate the wedge including a track upon which at least a portion of a vehicle rests and a' lever engaging the track. I

3. A farm gate comprising, in combination, a tubular pivot bearing carried with the ga te,

a pivot upon which the bearing reciprocates and rotates, a wedge carried with the bearn ing, a circular cam with'which the wedge engages andmeans to elevate the wedge, including a movable camming surface carried with the pivot to engage the wedgel 4. A farm gate comprising, in combination, aftubular pivot bearing carried with the-gate, a pivot upon which the bearing reciprocatesand rotates, a wedge carried with the bearing, a circularcam with which the wedge engages and means to elevate the wedge, including a movable camming surface, a lever pivoted beneath the roadway having one end adapted` to elevate the movable camming surface and the other end adapted-to 'be depressed by a vehicle carried with the pivot to engage the wedge.

Y5. A farm gate, comprising, in combination, a tubular pivot bearing ca 1ried with the gate, a pivot upon which the `bearing reciprocates and rotates, a wedge carried with the bearing, a circular camwith which the wedge engages, and Jformed withfdiametrically opposite high points and diametrically opposite' lowpoints angularly disposed with respect to the gate, and means to elevate the wedge, 1n-

cluding a movable camming surface carried with the pivot to engage the wedge and having drametrically opposite low points in a plane normal to the gate,

6. A farm gate comprising, :in conibination,v

a tubular pivot bearing carried with the gate, a pivot upon whichfthe bearing reciprocates Aand rotates, a wedge carried with the bearing,

a circular cam with which the wedge engages yand means to elevate the wedge, including a `movable camming surface carried with `the pivot to engagethe wedge and means to pre'- vent rotationv of the movable cam.l

7 A farmvate comprising, in combination, a centrally pivoted gate, transverse channels defininga lever operating space below the road surface, each formed centrally with `a out away slot, a transversely extending lever pivoted in thespace, a plunger resting on the end of the lever, a track along the edge of the road resting at one end in elevated condition on the plunger, a circular cam resting on the channels but beneath the road surface and formed with a vertical angular bore and with diagonally opposite elevated dwells defined 'by a'vertical plane angularly disposed withtionof` the gate, a pivot having a squared lowf er end disposed betweenfthe channels and reciprocating inthe slots thereof and a tubular pivot bearing carried with the gate at its midise point and reciprocable and rotatable upon the pivot and formed at its lower end with a wedge adapted to rest on the circular cam,

8. A farm gate comprising, in combination, a centrally pivoted gate, a track along the edge ot the road resting at one end in elevated position on one end ot tbe lever, a circular cam formed with a vertical angular bore and with diagonally opposite elevate/l dwells dis'- posed in a vertical plane,singularly disposed with respect to a vertical plane normal to the gate in closed position, and described in a direction oit rotation away from tbe direction of opening of the gate and with diametrically opposite low spots disposed in a vertical plane angularly disposed with respect to a vertical plane includingl the gate .in closed position and described in tl'ie said direction ci' rotation ot' the gate7 :1 pivot rest-ini;` on the otlier end of the lever, a tiibular pivot bea ring member carried with the gate and having' a Wedge at its lower end resting` on the circular cam.

9. A farm gate comprising', combination, a tubular pivot bearingl carried with the gate, a pivot upon which the bearingl reciprocates and rotates, a Wedge carried Wi tli the ,Joarin a circular cam vvitli which the Wedge engage means to elevate the Wedge7 and means to lock the gate in closed position inclndingy a lng carried with the Wedge adapted to enter a recess t'ormed in the circular cam.

angles to eacli other, one of said cams being` fixed and the other being movable, and means to elevate the wedge including the movable cam. l

1l. A farm gate comprising in combination a tubular pivot bearing` carried with the gate, a pivot upon which tlie bearing recipro- Cates and rotates, a' Wedge carried withr the bearing, a pair of similar cams eet at right angles to eacli otherj one of Vsaid cams being lined and the other being movabla and means to' elevate the wedge including` the movable cam, a track in the roadway and a lever enfgaging the track and movable cani.

l2. il farm gate comprising, in combinau tion7 a tnbnlar pivot bearing,` carried with the gateI7 a pivot upon Which the bearing reciprocates and rotates, operatin` members compris ine; a Wedge carried with the bearing, and a circular cam with which the Wedge engages, means to elevate the Wedge, and means to lock the Agate in closed position including a lug' carried by one of the operating members and adapted to enter a recess formed in the other member.

In testimony whereof I atlix my signature.`

MATHIAS LEONARD BROCHHAUSEN.

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