US1209839A - Window-scaffold. - Google Patents

Description

E. HOKENSON.

WINDOW SCAFFOLD.

APPLICATION FILED JAN. 15. 1915.

1,209,839. Patented Dec. 26,1916.

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EMIL HOKENSON, OF CHICAGO, ILLINOIS, AS-SIGNOR 0F ONE-HALF TO LABS LINDSKOG, OF CHICAGO, ILLINOIS.

WINDOW-SCAFFOLD.

Specification of Letters Patent.

Patented Dec. 26, 1916.

Application filed January 15, 1915. Serial No. 2,341.

To all whom it may concern Be it known that I, EMIL HOKENSON, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Window-Scaffolds, of which the following is a specification.

The main objects of this invention are to provide an improved form of window scaffold adapted for temporary suspension at the windows of a building, so as to be conveniently used by window washers, painters and others who have occasion to work on or about the windows; to provide improved supporting means adapted to be quickly and easily arranged for securing the window scaifold in place without necessitating the use of any fastenings which must be embedded in the window frame or walls of the building; to provide improved means for adjusting the elevation of the platform with respect to the window ledge; and to provide an improved arrangement of the supporting means on the platform whereby the scaffolding may be folded into compact form for storage and transportation.

An illustrative embodiment of this invention is shown in the accompanying drawings, in which: 7

Figure 1 is a perspective view of the improved scaffolding as arranged in position on a window ledge. Fig. 2 is a perspective view of the window scaffold folded ready for transportation or storage. Fig. 3 is an enlarged detail of one of the brackets as viewed from the left of Fig. 1.

The embodiment of this invention comprises a platform mounted on a pair of supports which are adjustably carried on brackets, arranged to rest upon the window ledge and to be retained in position by means of flexible connections attached thereto and to clips shaped to engage the inner edge of the window sill. The supports and the platform are connected so as to be folded together into compact form whereby the scaffolding is conveniently carried about from place to place.

In the construction herein shown in the drawings, the platform 1 is in the form of a plank of suitable thickness to provide sufficient strength for supporting a worlnnan.

The supports 2 are constructed of bars or members 6, 7, and 8, which arepreferably ordinary 2x4 timbers arranged in the form of right-angle triangles. The platform 1 rests on the bars 6 each of which forms one leg of the respective right-angles. The bars 7, forming the other legs of the right-angles, extend downwardly adjacent to the building. The bars 8, forming the hypotenuses of the triangular supports, are either extended beyond the bars 7 to engage the wall of the building, or have plates 9 attached thereto which extend beyond the bars 7 and carry the rollers 10, so as to coact with the brackets in supporting the scaffolding in place.

The brackets 3 are preferably malleable castings and are made to fit over the bars 7 and be adjustable along the same, so as to vary the elevation of the platform with respect to the window ledge. The brackets are locked in any desired position on the bars 7 by means of pawls 14 pivoted to the brackets 3, so as to engage the notches 15 formed in the bars 7 and exposed through opening 3.1, formed in said brackets. A gravity latch 16 is pivoted on each of the brackets 3 and arranged to engage the respective pawls 14 so as to lock them in the notches 15.

The clips 5 are metal stampings made U- shaped in cross-section so as to conveniently enga e the inner edge of the window sill, there y serving as an anchor for the chains 4.

The chains 4 extend through stirrups- 17 formed on the inner ends of the brackets 3 and engage pins 18 extending horizontally outward from the opposite ends of the brackets 3. This arrangement of attaching the chains allows the scafiolding to be used on windows where the distance from the ledge to the sill varies.

Hinges 19 connect the supports 2 to the platform 1, so that the supports may be folded up against the platform 1 whereby the scaffolding is conveniently carried from place to place or may be stored away in a small space.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without depart ing fromthe spirit of this invention as de fined bythe following claims:

I claim: 7 1. A window scafi0ld, comprising a platform and supports carrying said platform, said supports having horizontal parts arranged for engagement with a window ledge so as to normally rest thereupon and having the elevation of said platform with respect tothe window ledge may be altered.

3. A window scaii'old, comprising a platform, a pair of supports carrying said platform and having their lower ends arranged to bear against the wall adjacent to a window, brackets slidably mounted on said supports and adapted to rest upon a horizontal part at one side of the window, a pair of clips adapted to engage a part at the opposite side of the window, and'means connecting said clips and brackets, said brackets being adjustable along said supports so as to alter the elevation of said platform with respect to the window ledge.

l. A window scaffold, comprising a platform, a pair of supports carrying said platform and having their lower ends arranged to bear against the wall adjacent to a window, brackets slidably mounted on said supports and adapted to rest upon a horizontal part at one side of the-window, said supports having notches formed therein, pawls onsaid brackets engaging saidnotches for locking said supports to said brackets, clips adapted to engage apart at the opposite side of the window, and means connecting said clips and brackets.

5. A window scaffold, comprising a platform, a pair of supports carrying said platform and having their lower ends" arranged to bear against the ,wall adjacent to a window, brackets slidably mounted on said supports and adapted to rest upona horizontal part at one side of the window, said sup ports having notches formed therein, pawls on said brackets engaging said notches" for locking s'aid supports to said brackets, a gravity latch on each of said brackets adapted to lock' the respective pawls in said notches, clips adapted to engage a part at the opposite side of the window, and means connecting said clips and brackets. V A window, scaffold, comprising a'p'l'atform, a pair of supports carrying said plat-. form and having their lower ends arranged to bear against the wall, adjacent to a window,brackets secured to said supports and 7 adapted to rest upon a horizontal part at one side of the window, a pair of clips adapted to, engage a part at the opposite side of the window, chains attached to, said clips, stirrup's formed on the inner ends of said brackets, and pins on the other ends of said brackets, said chains being adapted to pass through saidstirrups and engagesaid pins so as to provide a rigid connection between said Clips and brackets. I

Signed at Chicago this 13th day of J an, 1915,

EMI'L HOKEN SON'.

Witnesses:

EUGENE A. R MMLER, WILLIAM E. HANN.

Copies of this patent may be obtained for five cents eac n b'y addressing the Commissioner of Patents;

Washington, D C.

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