US809729A - Trestle. - Google Patents

Description

PATENTED JAN. 9, 1906.

J. M. NOBMAND.

TRBSTLB.

APPLICATION rum) 11:13.27. 1905.

IN VEN T 01? PVITNESSES:

'method of folding the trestle.

UNITE STATES PATENT OEETGE. I

JOSEPH .M. NORMAND, OF SPRINGFIELD, OHIO, ASSIGNOR TO THE RIDGELY TRIMMER COMPANY. OF SPRINGFIELD, OHIO, A CORPORATION OF WEST VIRGINIA.

TRESTLE.

Specification of Letters Patent.

Patented Jan. 9, 1906.

To all whom, it may concern.-

Be it known that I, JOSEPH M. NORMAND, a citizen of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Trestles, of which the following is a specification.

My invention relates to improvements in trestles of the knockdown type, particularly adapted to the use of paper-hangers, decorators, and others of the building trade.

The object of the present invention is to provide a structure which will be both simple and cheap in construction, of light weight, but strong and efficient in use, secure when in adjusted position, and capable of being folded into a compact body without protruding parts by a minimum amount of movement of the parts.

A further object isto so construct the device that the various operations necessary for adjusting or collapsing the structure will be simple and obvious to the operator.

A further object is to provide a structure in which the various parts are permanently secured together, thereby avoiding the liability of accidental separation or loss of parts.

With the above primary and other incidental objects in view my invention consists of the structure, the parts, and combination thereof or their equivalents hereinafter described, and set forth in the claims.

In the drawings, Figure 1 is a perspective view of my improved trestle in its adjusted position. Fig.2 is a perspective view of the trestle in its folded position. Fig. 3 is a side view somewhat diagrammatic, showing the Fig. 4 is a detail sectional view of the beam and legs.

Like parts are represented by similar characters of reference throughout the several views.

Referring to the drawings, a is the beam, having the longitudinal slot a in the under side thereof, the transverse notch a also in the under side and adjacent to one end thereof, and the transverse notch a on the upper side of the beam and adjacent to the opposite end thereof.

The legs I) are beveled at their upper extremities and are connected in pairs by the extended rivet or bolt 1). The openings in the legs I) for the passage of the connection I) ably in duplicate, as therein shown.

into parallel planes, as hereinafter mentioned.

Pivotally secured to the legs I), preferably by means of the connection I), are swinging connecting-links and Z) in such relation that they will be interposed between the respective legs I) and the side of the beam 0., as illustrated in Fig. 4, these parts being prefer- The opposite end of the link 6 is pivotally secured to the beam a at If in such relation to the notch a that when the link I) is turned about its pivotal connection 5' the connection b will enter the notch a, as indicated by arrows, Fig. 3, in which the adjusted position of the legs 1) is shown in dotted lines.

The link I) is provided with a slotted or slidin pivotal connection with the beam a, as at The pivotal connection of the link I) is in such relation to the end of the beam a that as it is turned about said point the connection b of the corresponding legs will pass about the end of the beam. After the link b has been swung about its pivotal point until the connection I) is above the beam at the slotted engagement of the link with the beam permits the link to be adjusted longitudinally until the connection I) of the corresponding legs will enter the notch a the movement being indicated by arrows in Fig. 3, from which view it will be apparent that the legs may pass from position below the beam to position above the beam while in a plane substantially parallel with the beam and then can be pushed down into proper folded position while maintained in the same plane related to said beam. WVhen the links b and If have been moved until the connections I)" are in their respective notches a a it is only necessary to move the opposite extremities of -the legs I), as indicated by arrows, Fig. 3, so as to bring the respective legs to a position parallel to each other andto the beam a and on opposite sides thereof, as shown in Fig. 2, the whole forming a compact bundle of even length. In order to secure the legs I) in their adjusted position, a plurality of braces areprovidedone for each leg. The braces c are pivotally secured in pairs,with the slot a of the beam a at a point 0, substanroom tially in the middle of said beam, and the opposite ends of the braces c are formed with a notch or hook, as at 0 adapted to engage a projection c on the respective legs I). When the trestle is in folded position, the braces c are adapted to fit flush within the slot a, as in Fig. 2. Braces d are provided to maintain the legs in their spread position. Each of the braces 61 is secured to one of the legs I) and is provided with a notch or hook adjacent to its opposite end'adapted to engage a projection (1 on the corresponding leg. A short lateral'arm (Z is shown in the drawings eX- tending at right angles to the braces 01 and formed integral therewith. This short arm (1 is provided with a notch or hook d also adapted to engage the projection d when the trestle is in its folded position and assist in maintaining the structure in a compact bundle. In order that the braces 11 may not interfere with the folding of the trestle, the said braces are attached to corresponding sides of j the respective legs, as shown in Fig. 1.

It is obvious that many minor modifications might be employed in carrying out the above invention. I do not, therefore, limit myself to the eXact construction, which illusstrates one form of constructionwhereby the legs are folded in parallelism with the beam with the ends of the several parts in alinement by very little movement of the parts and in a simple and effective way.

Having thus described my invention, I claim" 1. In a device as described, a beam, spreading legs connected together in pairs by .means which support said beam, and permit the 'up per ends of said legs to embrace said beam above said support, links pivotally attached to said legs at one end and at their opposite ends pivoted to said beam intermediate said legs and the adjacent ends of said beam, and braces for holding said structure in its erect position, substantially as specified.

2. In a knockdown trestle as described, the combination, with a beam, of spreading legs, a swinging connection between each pair of spreading legs and the beam, the swinging connection of one pair of legs being of sufficient length to pass beyond the end of the beam, and a sliding engagement between the last-named swinging connection and the beam to bring the connected legs within the limit of the beam when folded, substantially as specified.

3. In a device as described, the combination of a beam, spreading legs therefor connected in pairs, a notch in the under side of said beam adjacent to one end thereof, a'

swinging link connecting one pair of spreading legs and the beam, and having its pivotal connection with the beam substantially midway between the adjusted position of said legs and said notch, a notch in the upper side end; a swinging link connecting the second pair of legs and said beam, and having its pivotal connection substantially midway be tween the adjusted position of said legs and the end of the'bearn, and means for maintaining said legs in their adjusted positions.

4. In a device as described, abeam, spreading legs therefor connected in pairs, braces for maintaining said legs in relation to the beam, a longitudinal slot in the under sideof said beam adapted to receive said braces when in the folded position, and transverse notches in said beam adapted to receive the connecting means, of said spreading legs when in folded position, substantially as and for the purpose specified.

5. A folding trestle comprising a beam, spreading legs, the upper ends of which are adapted to extend on each side of said beam and embrace the same, a support for said beamwhich also forms the means for connecting said legs in pairs, connecting-links pivotally securing said legs with said beam at points intermediate said legs and the ends of said beam, and braces for maintaining said structure in its erect position, substantially as specified.

6. A folding trestle comprising a beam, spreading legs having aws at the upper end thereof to clamp the beam, means connecting said legs andsustaining the weight of the beam, pivoted links connecting said spreading legs and beam at points intermediate of the adjusted position of said legs and the eX-' tremity of the'beam, and braces secured to said beam and engaging said legs, substantially asspecified.

7. In a folding trestle, a beam, spreading legs adapted to clamp said beam, swinging links connecting said legs and beam at points intermediate the adjusted position of the legs and the ends of the beam, and a slotted connection between one of said links and the beam whereby the link will be permitted to swing on varying radii, substantially as and for the purpose specified.

8. In a folding trestle, the combination with a beam of spreading legs, means for supporting the beam upon the upper ends of said legs, swinging connections and supports secured to said beams whereby one pair of legs may be moved from a position below said beam to a position above and then in alinement with said beam, while being maintained in substantial parallelism therewith, substantially as and for the purpose specified.

In testimony whereof I have hereunto set my hand this 22d day of February, A. D.

JOSEPH M. NORMAND.

Witnesses:

S. C. NORMAND, CHAs. I. WELOH.

of said beam and adjacent to the opposite ITO

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