US1380718A - Trestle - Google Patents

Description

M. HERMAN.

TRESTLE.

APPLICATION FILED JUNEH, 1919'.

Patented June 7, 1921.

2 $HEETSSHEET 1- fife e7 HIVZZQ /Q/ Qfi/f M. HERMAN.

TRESTLE.

APPLICATION FILED JUNE 1|. 1919.

1,380,? 1 a, Patented June 7,1921.

2 SHEETS SHEET 2.

'UNETEE MEYER HERMAN, or cnroaeo, ILLINOIS.

TRESTLE.

Application filed June 11,

To all whom it may concern Be it known that LMEYER HERMAN, a former subject of the former Gzar of Russia, residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Trestles,

of which the following is a specification.

supported at variable altitudes and in rooms with the top or table part of the structure.

of contracted dimensions;

One of the objects of the invention is to provide a foldable and collapsible, selfcontained, supporting structure that may be used in place of a scaffold, or may be made to serve as a supporting bent or horse in the organization of a scaffold.

Another object of my invention is to provide a trestle organization adapted to be folded, or contracted into a relatively small compass, so that it may conveniently be carried by the workman, from place to place, or from room to room, and which may quickly be set up and adjusted, longitudinally and vertically, to varying lengths and heights, without the use of any tools or devices, and without requiring bolts, clamps, or other similar separable parts, commonly used with adjustable trestles of this type, of the usual construction.

The general arrangement of the parts, disclosed herein, ismore fully set forth and claimed in Patent No. 1,294,264: granted to me Feb. 11, 1919. The present invention relates more particularly to improvements in the leg structure to render the device, as a whole, more stable. 7

Other, further and more specific objects of my invention will readily appear to persons skilled in the art, from a consideration of the following description when taken in conjunction with the drawings, wherein Figure 1 is a broken away end view of the improved leg.

Fig. 2 is a side view of one of the legs extended and in operative position.

Fig. 3 shows the leg folded in, parallel Fig. 4: is a transverse section taken on line 1-4: of Fig. 3.

Specification of Letters Patent.

Patented June '7, 1921.

1919. Serial No. 303,334..

Fig. 5 is a section taken on line 5-5 of Fig. 4c.

Fig. 6 is 'a section taken on line 6-6 of Fig. l. 7

Fig. 7 is a rod for holding the parts in folded position.

In all the views the same reference characters are employed to indicate similar parts.

In the drawings 10 is a table, or top support, preferably, longitudinally extensible, upon which the workman stands when the device is in use. It is composed of a series of, preferably, wooden strips, or bars 6 and 7, in alternate relation, so that the bars may be moved'longitudinally of each other to increase the length of the table, as common in structures of this character, and as more particularly shown in the patent to which reference has heretofore been made. The bars, 6 and 7, are connected alternately to opposite ends. of the structure, the even numbers 6 being connected to a transverselyextending strip 8 that is secured to the bars 6, as by bolts 9, and which strip passes over the end, as at 10, and is secured to the terminal bars 6, by suitable fastenings 11, such as bolts or screws. A strip below, 12, is

similarly secured to the same bars. Spaced apart leg sections 13 and 1d are, preferably, made of angle iron or angular in shape or cross section, and are connected together by a spacing bar 15, at the bottom, to hold them in parallel relation. They are passed through a sliding guide provided in the cross plate 16,-see Fig. 6and each of them is provided with notches 17 for the holding dogs 18. This feature of the structure is similar to that disclosd in the patent to which reference has heretofore been made. The legs 13 and 14 are curved, as at 19, and are each pivoted tothe plate 10, as at 20. The legs, 13 and 14:, can be vertically raised or depressed to raise and lower the table, and are held in adjusted position by the dogs 18, engaging the notches 17. The dogs are withdrawn from their positions by 7 hinge member 28, is a part of the fitting 26, and has pivotal relation with the ends of the plate 16, as at 29. The fitting 26,

is also provided with a rearwardly extending ear 30, to which another leg 31, is pivoted, as at 32, there being a leg 31 on each side of the structure. The legs 31 are se cured to the legs 24 and 25, respectively, by their pivotal connection with the fittings 26 and at their lower end by pivoted link members consisting of the link 33 and a link 84, which are hinged to the legs 24 and 25, as at 35, and to the leg 31, as at 36, respectively. The legs 24 and 31 and 25 and 31 diverge laterally from the pivot points 29. The legs 24 and 25 are braced by the foldable link members 38, 39 and 40 and which are more fully set forth and explained in the patent to which reference has heretofore been made.

In the practical embodiment of the invention, the legs 24 and 25 are preferably made of hard wood, while the legs 31 may be made of metal. Secured to each of the legs 24 and 25 is a laterally extending bracket 40 provided with a slotted perforation 41 to receive a transversely extending rod 42 which has at one end a head 43, and which passes through the bracket 40. At or near one end of the rod 42, it is flattened,

, as at 45, to enter the'constricted part of the opening 41, and mounted on the outer end of the rod 42 is a button 47, in the shape of a truncated cone, pressed inwardly by a spring 48 secured in place on the end of the rod, by a washer 49 and a pin 50. When the flat portion of the rod passes through the constricted opening in bracket 40, the button 47 is moved into the larger portion of the opening, by the spring 48, and this prevents the retraction or withdrawal of the rod 42, and thus the leg members and the table member are held together, in folded relation so as to occupy less space to be more handily carried.

Having described my invention, what I claim is 1. A device of the character described providing in combination, a top support, having'pivoted at each end thereto a leg structure, each structure comprising a pair of parallel legs; a sub-leg structure in which said parallel legs are vertically adjustable, comprising a pair of pivoted, laterally-diverging legs, a pair of ears extending from the laterally diverging legs, a pair of longitudinally diverging legs, pivoted to said ears, and folding braces to hold the legs in their extended positions.

2. A device of the character described providing in combination, a top support, having pivoted at each end thereto a leg structure, each structure comprising a pair.

of parallel legs; a sub-leg structure in which said parallel legs are vertically adjustable, comprising a pair of pivoted, laterally-diverging legs, a pair of ears 30 extending from the laterally diverging legs and a pair of longitudinally diverging legs pivoted to the ears; folding braces to hold the legs in their extended positions; a pair of perforate brackets secured to the laterally diverging legs extending transversely across the folded structure and a rod adapted to be inserted in the opening in the brackets to hold the top and leg structure together when in folded ppsition.

3. A fitting for a device of the character described comprising a U-shaped member (28), having pivot receiving means for pivotal relation with a plate; a downwardly extending member (26), having pivot receiving means for attachment to a leg and a laterally extending member (30) having pivot receiving means for pivotal attachment to another leg.

In testimony whereof I hereunto subscribe my name.

MEYER HERMAN.

Images