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Publication numberUS496739 A
Publication typeGrant
Publication dateMay 2, 1893
Publication numberUS 496739 A, US 496739A, US-A-496739, US496739 A, US496739A
InventorsThomas Kennedy
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 496739 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

2 Sheets-Sheet 1.

(No Model.)



Patented' May 2, 1893.


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SPECIFICATION forming part of Letters Patent No. 496,739, dated May 2, 1893.

Application filed November 44, 1892. Serial No. 450,938. (No model.)

To all whom, t may concern.-

Be it known that I, THOMAS KENNEDY, of the city, county, and State of New York,have invented new and useful Improvements in Scaffold Trusses or Supports for Building, Decorating, or other Purposes, of which the following is a full, clear, and exact descripion.

This invention consists in an adjustable telescopic scaffold truss or support for building purposes, painting or decorating ceilings, also applicable as a tower and for other purposes or uses, the same embracing the features of construction and novel combinations of parts hereinafter described and claimed, and wherebya cheap, lightbut stable and adjustable structure of the above kind is produced, capable of easy erection and of being closed or dismembered when not in use so as to occupy but little space or compass during transportation and when storing away.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l represents a perspective view of my improved scaffold truss or support as erected and partly extended; Fig.2 a horizontal section of the same upon the line 2f2 in Fig. l; Fig. 3 avertical section mainly upon the line 3 3 in Fig. 2, of the structure Whenclosed and with one of its base timbers removed and shown in plan view at its side. Fig. t is a sectional elevation mainly upon the line 4 4 in Fig. 5, showing a modified construction of the truss or support and representing the same as erected and partly extended; and Fig. 5 a partly sectional elevation at right angles to Fig. 4, mainly upon the irregular line 5-5 in Fig. 4.

Referring in the rst instance to the first three figures of the drawings, the whole structure is mainly made of wood so as to be readily built by any carpenter, and its upright portion constructed of telescopio g wooden sections of angular or rectangular form in transverse section and tted to slide up and down one within the other, each succeeding upper one of said members or sections being of less size transversely than the one immediately below it. Thus A, is the first or lowest and largest one of said members, of rectangular sleeve-like construction built up of boards to give it its tubular shape and of any suitable length or height but preferably longer than each succeeding telescoping member. This lower square or tubular vmember A, is secured when erected to or on a solid fourarmed Wooden base or stand B B, by angle iron braces b and bolts and nuts c, which, when required to dismember the structure to facilitate packing or storing may be readily detached so as to leave the base or stand loose or independent of the rest of the parts, and this base or stand being made of two crossing timbers mortising one into the other, may also be readily dismembered when required and the timbers beplaced parallel with one another or otherwise.

A2 A3 A4, are similarly constructed and shaped wooden tubular or sleeve-like members, of which there may be any number, of

consecutively diminishing size -transversely in an upward direction so as to slide or telescope one within the other, the member A2 within the member A and each Succeeding telescoping member one within the other. These several members are made capable of varied adjustment up or down and of being locked or secured when so adjusted to vary the working height of the whole structure, by a series of bolt holes d, arranged one above the other in opposite sides of the telescoping members and detachable screw bolts e fitted with nuts and adapted to pass through the bolt holes d, so as to lock or secure each pair of telescoping members together, the several bolt holes d in said members being spaced to match in the independent adjustment of the members. This provides in a very simple manner for a very varied adjustment of the truss or support to any desired height. The .upper telescoping member A5 may be a solid stick of wood, having bolt holes d, through it and secured in position by one of the bolts e, and having mounted on it ahead-piece or table D, which will serve to support the one end of a scaffold, while a similarly constructed IOO scoping members may be closed or shut down one Within the other as shown in Fig. 3, so as to occupy but little space or compass when not required to be used, thus leaving the telescoping members in position for extension again when required. The easy and cheap construction of the several telescopic members as described is a strong point in favor of the truss, and their square or angular figure insures a steady guiding of them free from any turning of them, endangering the support of the scaffold erected or resting on the truss.

Figs. 4 and 5 show a substantially similar construction, but with mechanism operating from the base ofthe trusst'or adjusting the several telescopic or sliding sections bodily after they or certain of them have been individually adjusted up or down by the bolts c and the bolt holes d. The object of this is to securea more gradual and closer or finer adjustment ot' the truss to a particular elevation as may be sometimes necessary. To this end I arrange on the base or stand B and Within the v4Iirst section or member A ot' the truss which is stationary, a'frame or support f, carrying a vertical bevel wheel g, which may be operated by a crank or handle 7L that may be made accessible by unlocking and opening a door c' in one side of the section A of the truss. This Wheel g gears with a horizontal bevel wheel 7c also carried by said framefand having attached to it an upright screWZ that engages with a tixed nut or screw-box in a bridge m fast to and extending upwardly within and across the lower end portion ot the first sliding section or member A2 of the truss, so that accordingto the direction in which the handle h is rotated Will the several sliding and adjustable upper sections or members of the truss be bodily or collectively raised or lowered to give a nice or tine adjustment of the truss to any particular elevation. In this modication there Will be no necessity to have bolt holes in the lower member or section A for locking by a cross bolt the sections A and A2 together when the latter is adjusted up or down, as the mechanism for operating the sliding sections bodily or together dispenses with this. The several truss sections or members may be closed one Within the other when not required to be used, substantially as in the herein-previously described modification.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an upright truss or support for scat'- folding and other purposes, the series of angularl tubulartelcscopic sections or members capable of sliding and being independently adj usted up or down one Within the other and provided with a series of opposite bolt holes in their sides arranged one above the other and so as to match or -register with each other throughout the several sections, in combination with a series of removablebolts passing through' said holes and adapted to independently lock two or more adjoining telescopic members or` sections under varied adjustments together and to secure the Whole ofthe sections in place, essentially as shown and described.

2. In a telescopic truss of the character described, the combination, with the irstorlowest tubular sliding section of the truss,'of a gearing and screw mechanism adapted to gradually adjust the height ot' the truss, each sliding section or member of which truss is provided with means for independently adjusting it one within'another, substantially as described.




Referenced by
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Cooperative ClassificationY10S425/126, B66F3/08