US1760009A - Window scaffold - Google Patents

Description

May 27, 1930. E, SCHULTZ 1,760,009

WINDOW scAFFoL-D Filed Oct. 8, 1928 2 Sheets-Sheet l Ta; a. ik.

(66 :2v-G25 Z4 5258 May 27,v .1930. E. scHuLTz 1,760,009

I WINDOW scAFFoLDv V Filed ont. 8, 1928 2 sheets-sheet 2 Patented May 27, 1930 STES PATENT EMIL SCHULTZ., OIF STREATOR, ILLINOIS WINDOW scArroLn Application filed October 8, 1928. Serial N'o. 311,125. v 'M y This invention relates to improvements in window scaffolds, particularly the type employed in the art of window washing.

The primary object of this invention is to provide a device of the above mentioned character, which may be readily attached to a window frame and which may be adjusted into the desired position by the operator.

Another object of this invention, is to provide a window scaffold embodying clamping means whereby the scaffold may be quickly and easily attached or removed from a window frame for the purpose of supporting a human being while washing a window.

A still further object of this invention, is to provide a device of the above mentioned character which is strong in construction, having comparatively few parts and which is easy andsimple in operation.

Other objects and advantages of the invention will become apparent during the Y course of the following description, in which,

Figure 1 is a side elevational View showing the scaffold attached to a window frame;

Figure 2 is a plan view of the embodiment of this invention and showing the same applied to a window frame showing the window frame broken away and partly7 in cross-section;

Figure 3 is a longitudinal view of the clamping bars which are adapted to engage the inner frame members of the window;

Figure 4 is a cross-sectional fragmentary view taken on lines 4-4 of Figure 1, showing the manner and arrangement of the clamping bars and supporting arrangement;

Figure 5 is a cross-sectional view taken on line 5-5 of Figure 3, showing the clamping slide connections for the clamping bars, and Figures 6 and 7 are vertical sectional views taken upon lines 6--6 and 7 7 respectively of Figure 2.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of the invention. attention is directed to the drawings, wherein the reference character A will be employed to generally indicate a window frame, suitably mounted in a brick wall B of a building or the like. rlhe invention embodies a pair of U-shaped frame members upon the window frame A as shown clearly(Y 5 having vertical extensionsy and connected at their upper ends by cross-bars T. rlChe outside entensions 6 are connected at their, upper ends by a bar 8 which is formed integral with the'side bars 7. The cross-bars 7 and 8 may's be secured to the vertical extensions 6 by rivets 9 or other fastening means. A platform 1() may be mounted in the loop portions of the l-shaped frame members 5 and secured at( the opposite ends thereof by screws or fasten- 60 ing means 11 to prevent the platform 10 from becoming displaced. Secured `to the inner pair of extension bars is a pair of angle brackets 12 securedby an eye-bolt 13 passing *n v therethrough asyshown in Figure 4 and hav-"35 ing opposite nuts 14C and 15 threaded thereon 'for` securing the angle brackets 12 to the verticalextensions 6. Onefof the angle portions ,of the angle brackets 12 are adapted to rest,Yzr

' 0 in Figures 2 and 4." This arrangement provides a more sturdy support for the platform lO and causes most of the weight thereon to rest on the brackets 12. n

Secured to the eye-bolt 13 is a pair of sim- "75 ilar eye-bolts 16 which are adapted to be screw Y threaded as at 17 for receiving a wing nut 18. A clamping bar is provided for clamping the U-shaped frames 6to the window frame?4 A. The clamping bar is formed of a single". bar r18 having slidably mounted on the ends thereof clamping bars 19 which are slotted as at 2O for receiving thescrew threaded eyebolts 16. The screw threaded eye-bolts 16 also pass through the central clamping bar 18 as shownat 21. The inner ends of the clamping bars 19 are struck up as at 22 for limiting the sliding movement relative to the central clamping bar 18.y The clamping bars 19 are also provided with slide members 24 secured thereon by rivets 25 whereby the central clamping bar 18 may easily slide relative to the end clamping bars 19, that is that the end clamping bars 19 may be projected into 9.; the path of the window frame A in order to clamp the supporting` frame work to lit there to. This is accomplished by merely tightening the wing nuts 18 on the screw threaded portions 17 of the eye-bolt 16, which in turn is 10G keo connected to the eye-bolts 13 carried by the supporting frames 6.

It is to be understood that the forms of the invention herewith shown and described are to be taken as preferred examples of the same and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the in- Vention, or the scope of the subjoined claims.

I-Iaving thus described my invention, I claimzl Y l. In a window scaffold, a platform, U- shaped brackets secured to the opposite ends of the platform, brace bars for connecting the upper ends of the U-shaped brackets, an angle bracket mounted on a central portion of one of the extensions of each U-shaped bracket, an eye-bolt for securing the angle brackets to the U-shaped extensions, a screw threaded eye-bolt passing through the eye of the first mentioned eye-bolt and an adjustable clamping bar through which said screw threaded eye-bolt passes.

2. In a window scaffold, a platform, a pair of U-shaped brackets secured to the platform at each end thereof, cross bars for connecting the extensions of the U-shaped brackets, an angle bracket secured to each U-shaped bracket extension, a screw threaded eye-bolt secured to the U-shaped bracket extensions, a clamping bar through which said screw threaded eye-bolt passes, and which is -provided with sliding extensions for engagement with a window frame.

In testimony whereof I affix my signature.

EMIL SCI-IULTZ.

Images