US1949820A - Scaffold - Google Patents

Description

March 6, 1934. TIMMONS I 1,949,820

SCAFFOLD Filed Jan. 6, 1931 2 Sheets-Sheet 1 FIG 2,

IN I/ENTO)? Mozaiz's s JImoms N. TIMMONS March 6, 1934.

SCAFFOLD Filed Jan. 6, 1931 2 Sheets-Sheet 2 wa s-6.

ATTOPA E/ Patented Mar. 6, 1934 UNITED STATES PATENT OFFICE 1.;

1 Claim.

The scaffolding forming the subject matter'of the present application for patent has been designed more particularly for use by window cleaners to facilitate working upon windows from 5 the outside. The invention is capable of employment whenever work is required to be done from the outside of the window, whether it be painting, repairing, or the like.

Primarily, the invention contemplates the 1g provision of a novel and improved scaffold which can be readily put in place and removed. and

which obviates the necessity of using nails or other fasteners which would mar the window frame or sill.

As a further object, the invention aims to furnish a scafiold of the character indicated which will be adjustable to various dimensions thus rendering it applicable to windows of different sizes.

) A further object of the invention is the provision of a scaffold of this kind wherein the structure is of a collapsible nature to enable the invention to be folded up to facilitate its transportation or storage.

A still further object of the invention is to provide a scaffold of this kind which will be light in weight, very simple in construction, highly efficient and convenient in use, and which may be inexpensively manufactured and sold.

The various features of novelty which characterize my invention are pointed out with particularity in the claim annexed to and forming a part of this specification. However, for a better understanding of this invention, and of the u advantages possessed by it over my previous patent, numbered 1,531,159 dated March '24, 1925, reference should be had to the accompanying drawings and descriptive matter in which I have illustrated and described what I now re- 49 gard as the preferred embodiment of my invention.

In the drawings:

Figure 1 is a side elevational view of the window scailold (window in section);

Figure 2 is a plan view of the scafiold attachment means (window in section);

Figure 3 is a view, partly in elevation and partly in section of one of the catches that look the adjustable parts of the invention when the 50 scaffold has been adjusted as desired; V

Figure 4 is a sectional view on the line 4-4 of Figure 6;

Figure 5 is a sectional view on the line 5-5 of Figure 6;

Figure 6 is a perspective view of the invention in a partialJy folded or collapsed position, and,

Figure 7 is a detail view of a pivotal connection.

Referring specifically to the drawings, wherein like reference characters designate like parts throughout the views, numeral 4. denotes a window frame generally to which my scaffolding is applied. The scaffold is provided with two extensible side members having overlapping rails 5 and 6. Straps '1, secured at 33 (Fig. 4) embrace the rails 5 and 6 and permit the-same to be longitudinally extended with respect to each other during the adjustment of the scaffold. The adjusting means provided for this 70 purpose comprises a hook-shaped member 9, shown in detail in Fig. 3, pivotally connected to a strip 8 secured to the rail 6 and adjustable along the rail 5, which latter member has an angle iron 12 secured thereto provided with 7 spaced holes 52, to retain the member 9 in ad- J'usted position. The member 11 is secured to the strap 8 and has fastened thereto a spring to retain the member 9 in adjusted position in one of the openings in the angle iron. These two extensible frame members embodying the rails 5 and 6 are connected for lateral adjustment by means of two extensible members, one of which comprises 23 and 24, the inner ends of which carry metal straps for guiding the sliding movement and further for limiting such movement. This construction is best illustrated in Figure 6. The other element for permitting lateral adjustment of the scafiold frame embodies means for associating the scaiiold with the window frame and will be referred to presently.

The longitudinally extensible frame members 6 are provided at diametrically opposite points with straps 21 for the reception of legs 13, it 95 being evident that these legs will be adjustable by means of the spring pressed pawls or hookshaped members 20 in the same manner as referred to in connection with Figure 6, a suitable number of vertically spaced holes being 100 provided in each leg 13. The purpose of these legs 13 is to support the scaffold, the legs being adapted to rest upon the window ledge 49 as clearly shown in Figure 1.

The second means for directing or guiding the 105 lateral adjustment of the extensible longitudinal frame members 5 and 6 has been referred to in cidentally hereinabove, and constitutes extensible rails 14 and 15 which have secured at their ends as at 22 (Figure 5) metal straps 16 whereby the 11 rails will be held in proper relation and a stop member 1'7 to limit the lateral movement of the rails.

Each of these rails 14 and 15 is connected near its outer end to the end of one of the members 5, the connection between 5 and 14 being had by means of a threaded shank extending through the end of one rail 5 and through the block 14' secured to the rail 14 by the fastening element 5' and adapted to receive a clamping nut 51, and that between 15 and the other rail 5 being had by means of a threaded shank extending from the end of rail 5 through rail 15. A second wing nut 51 on the threaded shank serves to hold the two rails 5 and 15 in connected relation, as shown in Figure 2. Other attaching means may be employed where expedient and it will be noted that I have provided wing nuts for-facilitating knocking down of the scaffolding. The ends of the extensible members 14 and 15 are provided with rubber pads 18-whichare adapted to grip the inside edge of the window frame as clearly shown in Figure 2.-

From the foregoing description read in connection .with' the accompanying drawings, the

i the extended portion of the same is to support alight weight. However, I have provided a fur ther supportingexpedient for the extended portion of the-scaffold, and the same embodies a pair of collapsible supports embodying the members which are pivotally connected at 35 to lugs 34of straps 32 secured to the ends of extensiblemembers 6 as clearly shown in Figures Land 6, the-straps being secured to the extensible members as at 33'. The other ends of the supporting members are pivotally secured at 54 to upstanding members 46 provided with medial offsets 47 for clearing the outer edge of the window ledge-49, as shown in Figure 1. The connection of the members 46 with the outer rails 5 is a pivotal connection as indicated at 48. The supporting members 46 rest against the building wall 50 which is made to take up the strain of weight upon the scaffold, the members 45 acting as props. It will be noted in this connection that the pivotal connection 44 comprises interfitting portions formed on the ends of the members 45, as shown in Figure 7. The ends of the members are formed, as at 54, to provide stops for limiting the angular movement of the members 45 with respect to each other. It will be noted that the members, 45, when the scaffold is in working position, are slightly out of alinement with respect to each other so that the stops 54 will maintain the support rigid and prevent collapsing thereof when in use.

The angle irons 26, are secured to the inner rails 6 and spaced therefrom by blocks 27 to provide a space for the member 46 when the scaffold is folded and not in use. These angle irons 26 constitute the support for the flooring or platform formed by the relatively extensible boards 28, the alternate ones of which are held in place and secured to the bottom legs of the angle irons as at 31 (Figure 4). Suitable metal straps 30 secured to alternate boards and embracing the top and bottom of the flooring permit lateral adjustment of the scaffold.

In order to render the scaffold safer, I have provided a railing therefor, which embodies upright members 39 and 40 which are pivotally connected with each other, as at 43, and to the inner ends of the rails 6 and are in turn pivotally connected at their upper ends, as at 41, to longitudinally disposed horizontal rails 42, the other ends of which are connected to corresponding upright supports comprising members 39 and 40, and which are pivoted at 36 to the inner sides of the rails 6. A horizontal rail is provided between the members 39 and constitutes extensible portions 53 having straps 55 secured to the ends thereof to allow for lateral adjustment of the scaffold frame as hereinbefore referred to. The pivotal connection 43 is provided with stops in the same manner as referred to in connection with the construction shown in Figure 7, and the lower ends of the members 40 are provided with laterally extending lugs 38 forming stops to limit rearward movement of members 40 and the railing when in working position.

From the foregoing, it will be apparent that the railing of the scaffold will be pivotally secured to the extensible sides thereof and may be folded down upon the frame. The stops 43 and 38 maintain the structure in upright position and prevent movement of the'railing except when the hinged joints of the members 39 and 40 are broken, as shown in Figure 6.

While I have described and illustrated the preferred embodiment of my invention, as heretofore stated, yet it will be understood that various changes and modifications may be made without departing from the spirit of the invention as defined by the following claim.

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

A window scaffold comprising a pair of extensible side members adapted to extend through a window frame, an extensible end member connected to said side members and having its ends provided with rubber pads to grip the outer vertical edges of the inner side of a window frame, legs supporting said side members, adjusting means for said legs, vertically extending members pivotally connected to the side members and in contact with the outer surface of a wall, collapsible inclined members pivotally connected to the vertically extending members and the side members, a laterally extensible platform carried by the side members comprising two sets of slats alternate ones of which are secured to each of said side members, vertically extending members extending above said platform adjacent each corner thereof and pivotally connected to said side members, joints midway of the length of said vertically extending members and adapted to collapse said members inwardly, and rail members connecting said vertically extending members at their upper ends around three sides of said platform.

NICKLESS TIMMONS.

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