US731994A - Adjustable trestle. - Google Patents

Description

No. 781,994. PATENTED JUNE 23, 1903. L. G. GANTRELL.

ADJUSTABLBTRESTLE.

APPLICATION FILED AUG. 9. 1902.-

H0 MODEL.

UNITED STATES Patented June 23, 1903.

PATENT OFFICE.

LOUIS GORBY CANTRELL, OF NASHVILLE, TENNESSEE, ASSIGNOR OF ONE-HALF TO JOSEPH M. JOHNSON, OF NASHVILLE, TENNESSEE.

ADJUSTABLE TRESTLE.

SPECIFICATION formingpart of Letters Patent N 0. 731,994, dated June 23, 1903. Application filed August 9, 1902. Serial No- 119,0l7. (.No modeLi' To all whom it may concern:

Be it known that I, LOUIS GORBY CAN- TRELL, a citizen of the United States, residing at Nashville, in the county of Davidson and State of Tennessee, have invented a new and useful Adjustable Trestle, of which the following is a specification.

This invention relates generally to trestles, and more particularly to an adjustable trestle particularly adapted for use of painters, carpenters, and the like.

The object of the invention is to provide a simple and durable construction of trestle which can be quickly and easily adjusted and one which can be folded into a very small compass when not in use.

Another object is to provide a trestle which can be used either singly or in series.

With these objects in view the inventionconsists in the novel features of construction, combination, and arrangement, all of which will be fully described hereinafter and pointed out in the claim.

In the drawings forming part of this specification, Figure 1 is a perspective view of a trestle constructed in accordance with my invention. Fig. 2 is a detail viewshowing the manner of connecting the stringer to the supporting-standards. Fig. 3 is a sectional view showing such connection. Fig. 4 shows a slightly-modified construction of supportingstandards, Fig. 5 is a detail of such modification. Fig. 6 is a view showing construction employed when the trestle is arranged in series. Fig. 7 is a view showing the extensible stringer.

In carrying out my invention I employ a horizontal bar or stringer A, having the vertical end pieces A connected to its ends, said pieces being braced by means of the oblique braces A Ordinarily this stringer A consists of a single piece; but, if desired, it may be made in two parts, the inner ends having loops A connected thereto and through which the extension-bar A slides. By this construction the stringer can be extended or contracted, as desired. The vertical end pieces A are each provided with the plurality of depending hooks B, which are adapted to engage the horizontal pins B, which extend across the grooved portion of the standards 0, said groove being a compound one, the inner portion being adapted to receive the hooks B,

while the outer portion of said groove is intended to receive vertical end pieces A. The standards 0 are supported by means of the inclined legs 0', connected at their upper ends to the upper end of the standard, the lower ends of said legs being connected by means of a cross-piece C and upon which the lower end of the standard rests, as most clearly shown in Fig. 1. Each end piece A has a U- shaped clamp D pivoted thereto at D, the free ends of said clamp being adapted toengage the depending fastening-plates D secured upon opposite sides of the standard 0, and by reference to Fig. 3 it will be noted that the clamps and plates are arranged intermediate the hooks and pins. After the hooks have been brought into engagement with the pins the clamps are turned so as to bring their free ends into engagement with the plates D and in this manner the stringer is securely locked to the standard, and inasmuch as there are a plurality of pins and also a plurality of plates it is obvious that the stringer can be adjusted to any desired height between the standards.

In Fig. 6 I have shown a double standard or one having both faces grooved, so that two stringers are adapted to be connected thereto.

In Fig. 4 I have shown the standards supported by means of legs G pivotally connected to a plate 0 and provided with claw-feet C in order to avoid slipping. This construction I have found particularly adapted for the use of bricklayers, and this form of support can be used in connection with the other form, if so desired, or both ends of the stringer may be supported by a standard held in this manner. The other portions ofthe standard are exactly the same, and the operations of the various parts are identical.

The construction and operation as well as the advantages of a trestle constructed in accordance with my invention will be apparent to every one skilled in the art to which it appertains.

Having thus fully described my invention, inner grooves, hook members carried by the What Iclaim as new, and desire to secure by end pieces and adapted to engage said pins,

Letters Patent, is-- I and supporting-legs secured to the standards. 10

In a trestle, the'combination with a stringer, LOUIS GORBY OANTRELL. 5 of end pieces secured thereto, standards hav- Witnesses: I

ing compound grooves in their inner faces, H. B. CARNEY,

horizontal pins arranged transversely in the H. W. BASHAW.

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