US1014554A - Trestle. - Google Patents

Description

OQZBNT.

TEESTLE.

APPLIGATIONTILED P3318. 1911.

Patented Jan. 9, 1912."

Inventor OTTO ZEN'I, 0F LITTLE RIVER, KANSAS.

TRESTLE.

Specification ofIetters Patent.

Patented Jan. 9,1912.

Application filedFebruary 8, 1911. Serial No. 607,276.

To all whom it may concern Be it known that I, OTToZnNT, a citizen of the United States, residing at Little River, in the county of Rice and State of Kansas, have invented a new and usefnl Trestle, of which the following is a specification.

It is the object of this invention toprovide a collapsible trestle for the support of temporary scaffolds, and for other purposes, so constructed that the constituent elements of the trestle may be maintained in various adjusted positions, whereby to change the dimensions of the trestle.

Another object of the invention is to pro-- vide novel means for holding the constituent elements of the trestle firmly together, to effect a rigid supporting structure.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combi nation and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings,Figure 1 shows the invention in perspective; Fig. 2 is a vertical section taken longitudinally of the legs of the trestle; Fig. 3 is a perspective of one end of one of the secondary elements of the legs; Fig. 4 is a detail perspective showing the connecting element whereby the beam of the portions of the trestle. are. united; and Fig. 5 is a transverse section of one of the braces whereby the legs are united.

The legs 1 of the trestle consist of diverging primary members 2, preferably fashioned from channel iron or steel, having their open faces disposed toward each other. Secured to the upper ends of the primary -members 2, are angle brackets 31.

movement between the elements 2 and 3 will be prevented, the parts 2 and 3 being further held against movement, when desired, by means of set screws 6, adapted to be mounted in openings 7 in the side flanges of the primary members 2, the set screws 6 registering in openings 8 in the secondary portions 3 of the legs.

The secondary members 3 of the legs are united by braces, these braces consisting of parts 9 and 10, the parts 9 being secured to one of the secondary members 3, while the parts 10 are pivoted, as shown at 11, to the opposite secondary member 3, the last named secondary member being cut away, as shown at 12, so that the part 10 may have limited pivotal movement. Halved into the parts 9 and 10, as shown at 13, is a bar 14, the bar 14 being secured to the member 10 by means of a set screw 15 or the like. The member 9 of the brace structure is slotted longitudinally as shown at 16, and through this slot 16, into engagement with the bar 14, extends a set screw 17. The bar 14 is provided along its bottom, with a flange 18, adapted to extend beneath the parts 9 and 10 of the brace, to insure rigidity in the brace.

From the foregoing it will be seen that, by loosening the set screws 5 and 6, the secondary parts 3 of the legs may be telescoped within the primary parts 1, to lengthen or to shorten the legs, the cooperation between the elements 9, 10 and 14 being such that by loosening the screws 15 and 17 the brace, involving the parts 10, 9 and 14, may be lengthened or shortened at will, as will be necessary when the relative positions between the parts 2 and 3 of the legs are changed, when the legs are elongated or shortened.

Resting in the angle brackets 31, is a beam consisting of parts 19 having openings in their adjacent end faces, to receive a securing bar 20. Removable pins 21 are inserted transversely through the beam parts 19, to engage the bar 20, the construction being such that the effective length of the beam portion of the trestle may be lengthened or shortened at will.

In order to hold the angle brackets 31 against the elements 19, a turn buckle structure is provided, the same including threaded members 22, the heads of which are adapted to fit in seats 23, formed at the upper, ends of the slots 4, the members 22 being connected by a sleeve 24. Obviously, by rotating the sleeve 24, the angle brackets 31 will be drawn closely against the beam parts 19. Owing to the fact that the seats 23 communicate with the slots 4, the turn buckle structures may be mounted at various adjusted positions in the slots 4, when desired. At this point it may be noted profitably, refer-ring to Fig. 3, that the upper ends of the secondary members 3 of the legs are notched, as shown at 25, so as to clear the elements 22 of the turn buckle structures, the upper ends of the portions 3 of the legs being beveled as shown at 26, so as to fit in space denoted by the numeral 27 in Fig. 2, and existing between the primary members 2 of the legs and the outer faces of the angle brackets 31.

, The beam members 19 are connected with the portions 3 of the legs, by diagonally disposed braces, comprising rods 28, the remote ends 29 of which are secured to the members I 19 and 3, the adjacent ends of the rods 28 being overlapped upon each other and adjustably secured together by means of a pin and opening connection 30, or in any other desired manner, so that the diagonal braces which unite the beam with the legs, may be elongated and shortened, as will be necessary when the relative positions of the elements 2 and 3 are changed.

From the foregoing it will be seen that the legs 1 of the trestle may be elongated at will, the effective length of the beam structure 19 being capable of adjustment, by manipulating the pins 21, so as to engage the bar 20 at successive points. Moreover, when the adjacent ends of the beam members are spaced apart slightly, as shown in Fig. 1, a suitable projection upon a scaffold, resting upon the beam members, 19, may be engaged between the adjacent ends of the beam members, the construction being such that the scaffolds cannot slide longitudinally of the beam members.

The structure, it will beunderstood, may be fashioned from any desired materials,

and when the device is set up for use, a rigid support for scaffolds and the like will be provided, the construction, however, being such that the device may readily be knocked down and stored in small compass. The secondary members 3 of the legs, may be removed entirely, the primary portions 2 of the legs, in such instance, serving as the immediate support for the trestle.

Having thus described the invention what is claimed is 1. ln'a trestle, diverging legs comprising primary channel members having longitudinal slots therein, provided with enlarged seats at their upper ends; turn buckles engaged terminally with the seats; secondary members slidable in the primary members; securing devices adjustably binding the primary and secondary members together, the securing devices being movable in the slots, with the primary members; and a beam connected with the legs.

2. In a trestle, diverging legs comprising primary channel members having longitu-.

dinal slots therein, provided with enlarged seats at their upper ends; turn buckles engaged terminally in the seats; secondary members slidable in the primary members; securing devices adjustably binding the primary and secondary members together, the securing devices being movable in the slots, with the primary members; angle brackets secured to the primary members, adjacent their upper ends; a beam resting in the angle brackets; the secondary members being slotted at their upper ends, to clear the turn buckles, and to permit the upper ends of the secondary members to abut against the angle brackets.

In testimony that I claim the foregoing as my own, I have hereto afiixed'my signature in the presence of two witnesses.

o'rTo ZENT.

'Witnesses:

' WILLIAM G. GREENBANK, JESSE H. FRANKEBURGER.

Copies of this patent may be obtained for five cents each, by addressing the 3 Commissioner of Patents, Washington, D. 0.

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