US1618305A - Adjustable trestle - Google Patents

Description

Attorney Feb. 22, 1927. 1,618,305

w. F. PAULETT v ADJUSTABLE magma Filed April 28, 1926 2 Shets-Sheet 1.

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729 flg /Z I 1,618,305 W. F. PAULETT ADJUSTABLE QTRESTLF! Feb. 22, 1927.

Filed April 28, 1926 2 Sheets-Sheet 2 y 7 7 AZ. 7

In e or m WJYJ QZZ Bypmm Attorney Patented Feb. 22, 1927.

' UNITED STATES PATENT, 0F

WILLIAM F. PAULETT, OF SCOTTSVILLE, VIRGINIA.

ADJUSTABLE TRESTLE.

Application filed April 28, 1926.

This invention relates to trestles for use by plasterers, wall paperers, carpenters, and like workmen for supporting the end of a platform or for use when in moderately elevated conditions to support the workmen directly thereon without requiring a pair of the trestles between which the usual platform board is arranged.

The primary object of the invention is to substantially improve and simplify over trestles of this character and to the attainment of this end, an extremely simple, but yet highly novel construction is employed in order that the trestle may be elevated to great height or lowered as desired, and that may be readily knocked down for transportation or storage.

' An additional object of the invention is to provide a trestle wherein an improved form of clamp is employed to maintain the adjustably associated parts rigidly interconnected and without any liability of the same slipping which is the main disadvantage with trestles of this general character.

Other objects will become apparent as the nature of the invention is better understood,

the same comprising the novel form, combi nation, and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings wherein like reference characters indicate corresponding parts throughout the various views:

Figure 1 is a side elevation of my mproved trestle, in partly elevated condition.

Figure 2 is an end elevation thereof.

Figure 3 is an enlarged fragmentary vertical section taken substantially upon the line 33 of Figure 2 for more clearlydisclosing the interconnection of certain parts of the trestle.

Figure 4 is a detaillongltudinal section taken substantially upon the line 4.-4 of Figure 1 for disclosing anotl1er form of clamp between certain of the vertically adjustable interconnected members, and

Figure 5 is a detail longitudinal section taken substantially upon the line 55 of Figure 1 for bringing out more clearly certain structural elements of the trestle.

Now having particular reference to the drawings, my novel trestle constitutes the provision of a horse-like unit des1gnated generally 5 consisting of a cross beam 6 upon the opposite faces and adjacent the opposite ends of which are attached the offset Serial No. 105,254.

interconnected by cross bars 10-10 arranged upon the opposite sides 7 thereof, Figure 5, and secured to the legs and to each other by bolt and nut connections 11. Arranged upon the outer sides of the legs 7-7 are supplemental extension legs 12 guided between the ends of the bars 1010 which bars project slightly outwardly of the legs 7 as clearly disclosed in Figure 5. Said supplemental extension legs 12 are formed throughout the major portion of their length with slots 13 through which engage the forward threadedends of shouldered and headed bolts 14 arranged rigidly within the lower end of each leg 7,.-Figures 2, 4, and 5. Arranged over the outer end of each bolt 14 that projects through the slot 13 of the complementary extension leg 12 is a rigid metallic clamp plate 15, the opposite side edges of which are flanged inwardly as at 16'16 forengagement upon the sides of the respective extension 12 to prevent the turning of the plate upon the bolt. Arranged upon' the end of each bolt 14 outwardly of the respective plates 15 is a. handle clamping nut 17 to permit the extension legs 12 to be rigidly secured with respect to the complementary beam legs 7. Through the provision of the extension legs 12 the horse like unit 5 may be raised or lowered to the desired height and also the same may be arranged in a horizontal manner regardless of the inclina- 7 tion of the floor or other support upon which the trestle is disposed, this by extending the legs in a predetermined manner with respect to the legs 7 of the horse. By the use of the particular form of clamp detailed in .Figure 4:, it will be readily appreciated that the handle nut may be turned inwardly upon the bolt to such, an extent as to absolutely rigidly connect the legs 12 with the legs 7 and this without any liability of splitting either of such legs.

Interconneoting the bars 101O between the legs 7 at each end of the beam 6 is a cross beam 18, the opposite ends of which are beveled at their under side as clearly disclosed in Figure 3 in order that flush engagement ot the beam will be hadwith respect to the bars 10--10. Each end of the beam 18 has rigidly mounted therein a depending headed and threaded bolt 19 that extends between the bars 10-10 beneath which a clamp plate 20 is arranged upon the threaded end of the bolt. Intermediate the ends of each clamp plate and upon the top side thereof is a boss 21 that extends between the bars to prevent the turning of the plate upon the bolt.

Beneath each clamp plate and arranged upon the threaded endot the bolt 19 is a handle nut 22, for an obvious purpose. interconnecting the beams 6 and 18 respectively, is a diagonally extending bar .23 that is ii ivotally connected at one end as at Qtto thebeam G and detachabiy connected at its opposite end as at 25 to the beam 18 in orderthat thesaine may be readily disconnected from the beam 18 and swung upwardly into position alongside the beam 6 after the trestle has been knocked down. Likewise the legs 7- 7 at opposite ends of tliebeam 6 may be swung inwardly with re spect thereto after the beam 18 has been detached from the leg connecting bars 10-10. The trestle? further constitutes the provi sion of anadditional beam 27 in horizontal alignment with the other beams (i and 18 and iiiposition above the bean'i 6. Depending from saidbeam 27 intermediate the opposite ends thereof are detachable relatively elongated legs2828that extend downwardly alongside the beams 6 and 18, Figures 1,"2, and 5. i ii Thelegs 28-28 are slotted throughout the major portion of their length as at 29 in ordcr'that a slidable interconnection may be had between thelegs and the beams 6 and 18 through themedium of connections identical to that disclosed in the detailed view, Figure For detachable arrangement upon the top side of the beam 37 isa workman supporting platform board 30 in order that a single trestle maybe employed for the supportof a workman when the elevation reduired 15 not greater than that of the length ot'' the legs QS QS,

It will thus beseen that tlllOl lgh the provision of a trestle of this character either one ot the three beams (3, 18, or 27 may be employed for supporting the opposite ends of a platform for time providing at all times three elevations without requiring the ad justment of the trestle for securing such elevation. However, it is readily obvious that the trestle (i may be raised or lowered whenever desired, as also may be the beam 27 thus pern'iitting a great height to be obtained, and this without imparing the supporting qualities ot'the trestle.

Although I have herein shown and described the invention as consisting of certain detail elements of construction, it nevertheless to be understood that departures may be had therefrom without eli'ecting the spirit and scope of the appended claims.

. Having thus described the invention, what I claim as new and desire "to secure by Lettars Patent is 1. In an adiustable trestlestructure ot the class described, a supporting horse comprising a horizontal top beai'n, pairs of main legs connected to the end portions of said beam and depending therefrom in spaced diverging relation, cross pieces connected with the intermediate portions of themain legs,

the ends of said cross pieces extending beyond saidlegs, and auxiliary extension legs adjustably connected with the main legs and slidably confined between the extending end portions of the cross pieces.

In an adjustable trestle oi the class described, a horse comprising a horizontal top beam. downwardly diverging legs at the ends of said beam, spaced cross pieces socured to each pair of legs, a second beam disposed horizoi'itally beneath the top beam and across the top of said cross pieces, a clamping plate disposed transversely across the bottom ol each pair of spaced cross pieces. an upstanding boss on each clamping plate and disposed between each pair oi spaced cross pieces, bolts extending through t a. ends of the second beam and through the bosses and iin'ermediate portions oi the re spective clamping plates, and a nut threaded on the lower end of each bolt.

In testimony whereof I afiix my signature.

lVILLIAM PAULET'IT.

lOO

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