US318896A - Folding and extension trestle - Google Patents

Description

(No Model.)

G. HANSS'EN.

FOLDING AND EXTENSION TRESTLE.

No. 318,896. Patented May 26, 1885.

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theirs trarne arent Ottica@ GUSIAV HANSSEN, OF ST. LOUIS, MISSOURI.

FOLDING AND EXTENSlON TRESTLEl rlPI-CIFICATION forming part of Letters Patent No. 318,896, dated May 26, 1885.

Application filed February 12, H85. (No model.)

To @ZZ whom t may concern.-

Be it known that I, Gusrnv HnNssnN, a citizen of the United States, residing at 1302 Arsenal street, in the city of St. Louis, inthe State of Missouri, have invented a new and useful Folding and Extension Trestle, of which the following is a specification.

)Iy invention relates to a trestle which can be easily folded for transportation or storage, quickly adjusted for use, and easily extended. These objects I attain by the mechanism demonstrated by the annexed drawings.

Figure I is a cross-section of the upper part of the trestle. a. indicates the casting into which the trestle-beani o is placed. It, u, has on each side a socket or inlet, into which the castings b and b (the ends of the trestle-supporters c and c) are forced and held 1n position by the bolts or fasteners d and d, d and d each running through a trestle-supporter, c or c, and maintaining or holding both b and b and c and c in position. e acts as center bolt and fastener, holding the whole together, and is also the pivot or axle on which the legs c and c Inovc when being adjusted.

Fig. II shows the end view of the trestlein position, the supporters c and @,with ends of b and b in sockets of a., maintained by the center bolt, c, the opening of the hinge-brace j', the extension g and g and c and c controlled, regulated, or maintained by the sliding clamps h and 7a. in connection wit-h the clamp-sockets p and p, together with the clamps v and yi, and adjusted by the brakes j andj.

Fig. III represents the side view, demonstrating by the arrows L'. and Z and m and n how the trestlc may be folded or unfolded after the adj ustincnt of the hingebrace f for ready use, storage, or transportation, as exhibited in Fig. IV.

The trestlc can be constructed of different materials. n, b, f, and j can be constructed of cast or otheriron; (1,6, It, t', andgof wroughtiron; c, g, and o of wood or iron. The whole may be constructed of any size to suit.

c is a casting longer than wide-in this case six inches long by two and onehalf wide by four and one-fourth high-with a tubular socket for the bolt or axle e. It is also formed with a cut or notch two by four and sixinches long for the beani o, and two half-inch holes at the ends of the bottoni to insert bolts q q, which fasten the beam to a, with projections r and r, of three-eighths of an inch on each side, forming the inlets forthe slices b and b.

Z and b arclonger cast-shoes of beveled shape at the upper end, three inches wide, (which lit into inlets formed by o* and 13) into which c and c, the supports or legs, are inserted and fastened by bolts d d, having been first secured by means of the axle-bolt e to u. This securing is accomplished by inserting t and b on each side of ce onto the ends of the axle e, then riveting the ends of c in such a manner that b and b have sonic play on e sufficient to enable the folding and unfolding and securing of the trestle.

c and c are supports, and inust correspond in length to the height of the trestle desired, (are in this description two by three inchesf) with notches p p for h and h to anchor into at regular intervals, upper end to fit closely into the shoes l) and I), held in position by bolt d.

d and d. are nut bolts inserted below c through l) and b and c and c, and holding them together, as already explained.

c is an axle, the body of which is tirinly enibedded in a below the notch for o, the ends of e projecting and forming axles, onto which shoes b and b are placed, and the ends of care then riveted, so as to hold Z and with play, as stated.

f is a hingc-brace (joint) fastened to the lower ends of c and c, the opening of which forces Z) and b against rivets of e and into the inlets formed by o* and r, securing two iirni supports. The closing of the brace enables the folding by bringing about the reverse action.

g and g are the outer supports or additions to the supports c and c, enabling the easy extension of the trestlc. They are of t-he sa me shape and dimension of c and c, are held and moved up and down the outer sides of c and c, regulated by the clamps h and It fastened'to their ripper ends, andare held in the designed position by means of It and It anchoring into the sockets p andp in c and c and by the closing of the brakes j and j.

and@ are two clamps held to the lower ends ofc and c by the sanie fastenings as f, and in which g and g slide up and down when thc trestle is extended or shortened.

and j are two cani -shaped brakes with handles, attached to the clampst and 1i. Then the handle is turned upward, they permit g or g to slide up or down c c. Vhen the handle is turned downward, g or, g is held firmly to c or c.

7c and Z and m and n on the drawings are an rows, showing the motion of the supports g g and c c in opening and folding the trestle.

o is the beam ofthe trestle, in the drawings two by four inches, length to suit, the ends of which are inserted into the notch of the casting ct, and held in position by two nut-bolts, q and g, at each end, running through it, and c in each notch of a.

p and p are sockets cut into the supports e and c sufficient to catch and anchor h and 71.

q are four bolts holding o at each end in the notch of a, as described, size to suit o and notch in a, as the same may be cast.

o and r are projections cast onto the outside of a near the upper edge, and on each side forming inlets,eorrespondng in width to Z1 and b, answering the double purpose of supporting and preventing swaying of the trestle in connection with f, as described.

As will be seen by the above, the trestle is folded by first closing f in each ofthe supports. rIhis draws c g and c g toward each other, and at the same time draws the shoes b b out of the inlets formedbyrr. Thelegs can then be swung on the axle e. One pair of the supports is then moved inward and up (m and n in fli'g. III) to the beam o, the other outward and over (It and Z in Fig. III) onto the beam o, when the trestle is folded as in Fig. IV. The trestle is lowered by opening the brakes j and j and raising the clamps h and h out of the sockets pp, then slid- 'ing g and g up along c and c; is raised by the ing movement to permit them to be folded 5o compactly.

2. In combination with the notched legs c and plain legs g, the clamps lo and t' and oamleverj ,substantially as described and set forth.

3. The combination of the casting` (t, shoes b, 55

' bolts d, axle @,beam o, legs c, and brace f, substantially as shown and described.

GUSTAV HANSSEN.

Titnessesz HENRY MEYER, FREDK. GoTTscHALK.

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