US799883A - Bracket or support for scaffolding. - Google Patents

Description

PATENTED SEPT. 19, 1905.

' E. R. ARGBNBRIGHT.

BRACKET 0R SUPPORT' POR SCAPPOLDING.

APPLICATION FILED AUG.16,1904.

2 SHEETS-SHEET 1.

I uuuu aw QM.' com@ PATENTBD SEPT. 19, 1905.

E. R. ARGENBRIGHT.

BRACKET 0R SUPPORT FOR SOAPFOLDING.

l2 SHEETS-SHEET 2.

APPLIOATION FILED AUG. 16,1904.

n' L L7( Aefownegs UNrTnD STATES ERNEST R. ARGENBRIGHT,

OF STAUNTON, VIRGINlA.

BRACKET OR SUPPORT FOR SCAFFOLDING.

Specification of Letters Patent.

Patented sept. 19, 1905.

Application led August 16, 1904. Serial Nm 2201990' T0 all whom, it may concern.'

Be it known that I, ERNEST R. ARGENBRIGHT, a citizen of theUnited States, residing at Staunton, in the county of Augusta and State of Virginia, have invented certain new and useful Improvements in Brackets or Supports for Scaffolding, of which the following is a specification.

The object of this invention is to provide a support in the form of a bracket or the like especially designed for use in erecting temporary scaffolding on the sides of buildings to facilitate attachment of weather-boarding or similar operations.

The invention comprises principally an upright adapted for attachment to the building, a horizontal arm adjustable vertically upon said upright, and brace. means for said arm. It is contemplated that several ofthe bracket-supports shall be arranged against the side of the building, so as to sustain horizontal boards or platforms upon which the workman may stand.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction ofv the means for eifecting the result reference is to be had to the following description and accompanying drawings.

While the essential and characteristic features of 'the invention are susceptible of modication, still the preferred embodiment of the invention is illustrated in the accompanying drawings, in which- Figure 1 is a perspective view of the support, partially designed to be disposed against the building at intermediate points of the sides thereof, the forked construction of the brace beingillustrated. Fig. 2 is aperspective View showing substantially the same type of upright as shown in Fig. 1 with the exception that the construction is modified for cooperation with a single brace. Fig. 3 embodies a modified construction of upright and means for positioning the horizontal arm. Fig. 4 illustrates still another modification of the invention. Fig. 5 is a broken perspective view ofthe inner end of the horizontal arm shown'in Fig. 1. Fig. 6 is a broken perspective of the spaced bars in Fig. 1, the securingbolt adjacent. Fig. 7 is a broken horizontal view bringing out the mountingof the latch-plate in Fig. 3. Fig. 8 is a horizontal section showing the latch means used in Fig. 4. Fig. 9 is a broken perspective view of the pivot portions of the brace and horizontal arm, the pivot-pin adjacent.

Corresponding and like parts are referred to in the following description and indicated in all the Views of the drawings by the same reference characters.

In the drawings, 1 designates a vertical upright or post from which projects the horizontal supporting-arm 2, the latter being reinforced by means of a brace 3. The braces used are of several constructions owing to the fact that a certain form of brace is necessary at the corners of the building, whereas at intermediate-points a different construction promoting greater rigidity may be used. In the preferred form of the invention the upright 1 consists of spaced guide-bars 4, and the innermost end of the arm 2 cooperates with the said bars- 4, being suitably secured to the upright by means to be described. Each of the guide-bars 4 is formed with guide-ribs 5, projecting froml the outer portions of the inner sides thereof, and an extension 6 at the inner extremity of the arm 2 operates between the ribs 5, projecting some distance into the space between the bars 4. The extension 6' prevents lateral play of the inner end of the l arm 2, obviating likelihood of displacement of said arm from the upright 1. 'The arm 2 is braced by means of an inclined brace 7, this brace being pivoted at its upper end, as shown at 8, to the under side of the arm 2 adjacent the outermost end thereof. The brace 7 is adjustable relative to the arm 2, and for this purpose a lug 9 is extended upwardly from said brace at a point between the ends thereof, said lug being provided with a plurality of openings to receive an adjusting-bar 11, carried by the arm 2. The bar 11 is pivoted at its upper end to the arm 2, being ladapted for lateral movement, and its lower end is extended laterally, as shown at 12, so as to engage in an ascertained opening 10 of the lug 9 to properly adjust the brace 7 and positively hold the same in operative position. The upper end of the bar 11 is preferably pivoted to a spring 13, attached to the under side ofthe arm 2 at a point betweenthe ends of the latter. To secure the arm 2 to the upright, the said arm is provided at its inner end with a vertical extension 14, having an opening therethrough, and an attaching-bolt or the like passes through the opening of the extension 14. The head of the bolt 15 is of square form and is received between the bars 4 of the up- TOO IOS

thereof. When the nut of the bolt 15 is screwed hard against the extension 14, the inner end of the arm 2 is firmly positioned relative to the upright, the brace 3 assisting in positively holding' said arm in the ascertained position above mentioned. The extension 14 moves longitudinally of the upright in adjusting the arm 2 vertically.

Any suitable means may be provided for securing the uprights 1 to the side of the building, and preferably cross-bars 16 are rigidly secured to the rear sides of the uprights 1, and said cross-bars are nailed or otherwise firmly attached to the building, thus holding the uprights in proper vertical positions.

The structure of the upright above described is designed more especially for intermediate points at the sides of the building, and the form of brace preferably utilized at such points is of forked construction, as shown in Fig. 1. The forked construction of brace mentioned affords a maximum amount of rigidity for the arms 2 in properly supporting said arms, and each of these braces consists of legs 17, secured together substantially at their upper ends and diverging toward their lower ends. The legs 17 of the forked braces are connected by means of a connecting-bar v18, from which bar extends upwardly the extension 9, which cooperates with the adjusting-bar 11. From the foregoing it will be noted that the forked brace is of somewhat A form, and the lower extremities of the legs 17 of said brace are pointed, so that they will positively engage in the side of the building to hold the brace 7 and arm 2 in place.

It will be understood that the uprights 1 are made in suitable lengths and are provided at opposite ends `with any suitable means for joining said uprights, whereby one may be disposed above the other and supported thereby. In buildings of different heights it will be necessary to use one or more uprights in vertical alinement in a manner which Will be clearly comprehended.

In Fig. 2 the upright is substantially the same construction as hereinbefore described with the exception that it is particularly adapted for use at the corners of the buildings, the spaced bars 4 of each upright being provided upon the outer vertical edge portions thereof with a plurality of stepped lugs' 19. The extension 14 operates against the outer portions of the bars 4 and between the stepped surface mentioned above. The brace 7a used in connection with the construction of upright now being described is of somewhat different form from the forked construction above set forth. Said brace consists of a single leg, the upper end of which is pivoted' in substantially the same manner as the forked brace, the lower end, however, being adapted to engage and rest upon certain of the stepped lugs 19 of the bars 4, so as to position the brace at the lower end thereof. The single structure of brace 7, in other words, cooperates with the'upright at the lower end instead of engaging the side of the building in the manner described relative to the forked brace construction.

It is designed that the horizontal arms 2 be adjustable vertically of the upright 1, and in order' to hoist said arms suitable tackle is utilized. cifically, a pulley 20 is rigidly attached to the upper portion of the building above each upright 1, and hoisting-ropes 21, provided with hooks at their lower ends, are connected with a main hoisting-rope 22, which passes over the pulley 20. The hooks of the ropes 21 are adapted to engage the extension 14 at theinner end of the arm 2 and a second vertical extension 23 at the outermost end of the arm 2, respectively. Thus when the main rope 22 is pulled upon the ropes 21, connected with the` arm 2, will raise this arm vertically of the upright until same reaches the desired height, at which point it may be adjusted as regards its point of attachment of the upright, the brace 7 or 7, as the case may be, being also properly positioned.

In Fig. 3 another modification in the structure of the upright 1 is illustrated, and in this instance said upright comprises a main post 24,v which post carries the spaced guidebars 4a, which receive the extension 6 at the inner end of the arm 2 therebetween. A transverse pin 22 passes through the extremity of the extension 6, so as to obviate likelihood of displacement of the arm from the guide-bars 4u. The vertical portions of the bars 45L are provided with the stepped lugs 19, and these lugs cooperate to fix the position of the brace 7, ifsuch brace is used, and, furthermore, the lugs 19 are designed to coperate with the arm 2 to positively engage the inner end thereof and form a support at this point. In the construction shown in Fig. 2 the inner end portion of the arm 2is adapted to rest directly upon certain of the lugs 19, whereas in the construction of the upright now being described said lugs 19 cooperate with a latch-plate 26, pivoted to the upper side of the arm 2 at the inner end portion thereof. The latch-plate 26 is pivoted at one end, and the opposite end portion is adapted to engage over the lugs 19 to support the arm in the manner above described. The arm 2 is pivoted with an arcuate slot 27, and a pin 28 projected downwardly from the latch-plate 26 operates in the slot 27 to guide the movement of the plate 26 aforesaid. The pin 28 is provided at its lower end with a head engaging the under side of the arm to prevent play of the plate 26. A lock-pin 29 may be used to positively engage the plate 26 and hold the same in engagement with the lugs 19. The latch-plate 26 carries the extension Describing the hoisting means spe-` TOO 14, with which one of the hoisting-ropes 21 is connected in elevating the arm 2. The extension 14a preferably comprises a U-shape member suitably attached to the plate 26. The cross-bars 16 are rigidly secured to the main post 24 of the upright.

In the construction of upright shown in Fig. 4 the same consists of a single supporting-post 30, the outer vertical edge portion of which is provided with the stepped lugs 19. Guide-ribs 31 are formed longitudinally oi' the vertical sides of the post 30, and said post is provided with transverse bars 16, by which it may be suitably attached to the building. Either the forked brace 7 or the construction of brace designated 7a may be utilized in connection with the various constructions of uprights herein before described. The adjustingbars 11 also are mounted in substantially the same manner and cooperating as hereinbefore set forth. The horizontal arm-2 in Fig. 4 is peculiarly mounted upon the upright or post 30, being provided at its inner end portion with pivoted clamp members 32, said clamp members being pivoted at one end to the arm 2, the opposite ends of said members being provided with recesses 33 upon their inner sides. The recesses 33 receive the guide-ribs 31 of the post 30, and the clamp members 32 are held in positive engagement with the post 30 by means of an adjustable fastening 34. The fastening 34 may comprise a bolt or the like passing through lateral openings in the clamp members 32, being adapted to draw the recessed end of said clamp members toward each other and effect engagement thereof with the guide-ribs 3l of the upright 30. The menibers 32 are pivoted in laterally-projecting pivot-lugs 35, extended from the arm 2, and

the arm in this construction is positioned by a latch-plate 26, similar to the plate 26, de-

scribed before. The inner end of the arm 2 is recessed, so as to receive the outer portion of the post or upright 30, and the plate 26a is designed to engage the stepped lugs 19,which are provided upon said-post 30. An extensuitable means may be provided for attaching one upright to another, and it will be noted that any suitable number of uprights may be disposed along the side of a building, so that the arms 2 thereof may support the platform upon which the workman may stand. Whenever it is necessary to adjust the height of the bracket-arms 2, same may be elevated by operation of the hoisting-ropes 21 and 22.

Having thus described the invention, what is claimed as new is- In a device of the class described, the combination of a vertical upright .comprising spacedbars, means connecting said bars,a horizontal arm projected from the upright and having an extension projected from the inner end thereof and received between said bars, means for elevating the arm, ribs extending vertically of the spaced bars and projected into the space therebetween, a vertical extension at the inner end of the horizontal arm and operating between the spaced bars of said upright, said vertical extension being connected with. the elevating means, a brace pivoted to the arm, an adjusting-bar carried by the arm and having adjustable connection with the brace ata point between the ends of the latter, and a bolt passing through .the vertical

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