US1685283A - Collapsible trestle - Google Patents

Description

Sept. 25, 1928. 1,685,283

- J. P. GIBSON, I

COLLAPSIBLE TRESTLE Filed March 17, 1927 I ga'ue nto'o -/?Ms 675500 GMM I Patented Sept. 25, 1928.

'aAMEsr. GIBSON, on natives; ab te- O GOLLAPSIBLE TR-ESTLE.

P Application filedlilarchli',1 927... Scriaiito: 175,994}

i This invention relates trestles more pa -r 'ticularly of the small, portable type used for supporting benches and tables .in banquet halls, mcss "halls andthe like, and, while particularlyadaptable to this use, will also be found. valuable for use by carpenters, paper hangers and similar mechanics, for supporting'their work; Y i p The principal .object'iof the invention is to provide a trestle of this type,.tl1c legs of which may be easily folded upon or disconnected from each 3 other-so that the entire trestle will occupy but a minimum of space for-shipping, transportingfor carrying, and which,whenferected, w-i'llbe firm a-nd solid.

, Another objectiof 'theinvention is to pro vide aleg structure fortrestles whichmay bev quicklyv applied to any cross piece to" form a complete trestle without the use of tools, bolts, nails and screws.

A further object is toprovide a, clampin g construction which will cause'thelegs to act as levers to grip thecrosspiece' andfirmly lock complete trestle into a. unit struc tare-. I x

Other objects and advantages reside inthe 'Jdetail construction of the; invention, which is designed for simplicity, economy,and eiiicien cy. These will become more apparent from the following description.

In the following detailed description of the invention, reference is had to the accompanying drawing which forms a part hereof. Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing; I v r Fig. 1 is a perspective view of a complete trestle employing one form of my invention,

Fig. 2 is a perspeetiveview of the legs of Fig. 1 in the dis-assembled condition, 7

Fig. 3 is an end view of atrestle employing an alternate form of invention. I

Fig. 4 is a. detail perspective view of an upper leg extremity illustratlng a second alternate form of the invention.

Fig. 5 isa fragmentary end view of a trestle illustrating a third alternate form of the invention. V

In the preferred form of the invention the body or cross piece of a. trestle is indicated at 10 with a pair of legs 11 and 12 supporting each extremity thereof.

Each of the legs 11 and 12 is pro-videdwith a sheet metal clamping member 13 bolted to its upper extremity as shownv at 14c. The

- 1 Adja-centjthe lo ncn'iber l3 is provided with a clamping fac f5 IOarranged-at an angle to the axis of the":

leg and terminating at its lower edge in-fa shelf orledge '15. and at its upper edge'i'na hinge inemberl6. Thesidesof themember 13, engage the edges-of the legsandarejproback of the legs. of opposite legs are join'ed across the top of, the cross p1ecejl0 byineans -ofahinge vided "with cars 17 which extend acrossy-the f flhehinge members] 16 plate 39; which connects .with} the hinges 1" through the,medium.of reinovable hinge .b'ins l8. Y .a

v 'wjer. eirtremityof each. leg 12, a hook member- 1-9 18 secured which 11- g'z-iges an eye 20 on the leg l-l Alturn buckle 121 is incorporated in eachof the hookflmem ers19. i

The legt constr-uction is-siich thatanycon;

venient 2sx trti nber ,may- .be empl oyed-lfor the cross p ece 10,. mwhicli case. the hinge plates BO- are placedacrossthe top, of the 2 X tandth e'legs 11 and .12 brought downward each side thereofl ntil the ledges pass under the cross.piecefl O The; hooks 1 9 .are then engaged in the:eyeIetsQOiand the turn biickles 2T are tightened. .This results in 'forci'ng the clamping faeesAO; of the members 13; firmly against,the-sidesof the cross piece so asto prevent any looseness or 1 vibration. 1

As the turn buckles are tightened, the upper extremities of the v.legstendto move out i wardly. This outward movement is resisted bythe ears 1'? wh ch engage the outer face of the legs. It is preferred to notch the cross piece 10 and set the hinge plate 39 in this notch so that it will not project above the top of the cross piece 10, as shown'at 22, Fig; 3..

In Fig. 31 have illustrated an alternate.

form of my invention which, however, 'employs the same clamping principle of the hooks 19 and turnbuckles 21.. In this form a clamping member 23 engages the sides only of the legs by means of cars 24.

The clamping member 23 1s bolted as.

'shownat 25 adjacent the upper extremity of the leg and carries a. hinge member 26 con-' 1 nee-ting with'the hinge member26 on the op: posite leg by a hinge plate 27. The lowerpartof the clamping member 23 is curved inwardly asishown at 28 to engage across piece 29, thence outwardly as shown at 30 to engage the' leg, thenceinwardly to form a" shelf or ledge 81 under the cross piece. The

clamping member is preferably, but not necessarily, formed: of spring steel or similar resilientmaterial so that it will first engage the lower portion of the cross piece and then be drawn to a. snug engagement with both the cross piece and the leg'by means of the. turn buckle 21.

1 In Fig. 4 a second alternate form is shown somewhat similar to the preferred form. In

this form, however, a sheet iron cap 32 is employed which passes across the outside of the leg and turns inwardlyat each edge be attached.

. thereof to form cross piece supports 38. The

' cap 32 passes over the top of'the leg and terminates in a hinge member 34 to-which any ofthe previously described hinge plates may In Fig. "5 still anotheralternate form of the invention is illustrated- This form is .more economical to manufacture and employs the turnlbuckie and hook previously described; In this form an extension hinge is arranged to extend across the top of a cross piece 36 and the tops of the legs 11 and 12,

and downwardly on the outside of each of the legs. On the inside of'the legs angle blocks 37 are placed to cause the legs to angularly project'from the faces of the cross piece. If desired, ledges 38 may be formed on the blocks37 to support the cross piece,' ho'w'ever,

of the "legs immediately before attachment.

the c'la-mping' action of the legs is usually sufficient'to maintain the cross piece in po-- sition. In brokenline in Fig. 5 the position to the cross piece is indicated.

*While specific forms of the improvement have been-described and illustrated herein, it

is desired to be understood that thesame may be varied, within'the" scope of the appended at their one extremity; projections for lllaln tainingsaid legs at an angle tothe faces of said cross piece;",and means for causing saidlegs to approach each other at their other extremities so as to cause said projections to be clamped against said cross piece.

2. Collapsible trestle legs adapted tolsup's porta cross piece comprising a pair of legs;

a hinge connecting'said legs with each rother, at t-llelfOlie extremity, said hinge-arranged to pass over said cross pieceya ngular faces on said legs adapted to contact with the sides of said cross piece; and means for clamping said angular faces against said ci'osspieca f 3. A collapsible trestle comprising across piece; a hinge plate arranged to'later'all-y cross the upper face of'said cross pieceyco- Y acting legs hinged one to each end of each of said hingeplates; clamping inemberscarri'ed by said legs and-adapted'to engage opposite sides of saidcross piece; means arranged to draw the'fi'ee extremities of said (Jo-acting legs toward each other so as to cause said clamping members to grip said cross piece; and'pro ections on said clampingmemtween said legs.-

.bers adapted to support said cross'piece ben testimony whereof, aflix signature.

; JAMES Pi eI soN; f

Images