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Publication numberUS710602 A
Publication typeGrant
Publication dateOct 7, 1902
Filing dateMar 22, 1902
Priority dateMar 22, 1902
Publication numberUS 710602 A, US 710602A, US-A-710602, US710602 A, US710602A
InventorsLouis W Niendorff
Original AssigneeLouis W Niendorff
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 710602 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Patented Oct. 7,' I902.



(Application filed Mar. 22, 1902.

(No Model.)

Inventor-.- Loculs WMbndozffi By [2229 flttorne UNITED STATES PATENT OFFICE.



SPECIFICATION forming part of Letters Patent No. 710,602, dated October 7, 1902.

Application filed March 22, 1902. Serial No. 99,450- (No model.) I

It (LZZ whom it may concern:

Be it known that I, LOUIS W. NIENDORFF, acitizen of the United States, residing in New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Scaffold-Chairs, of which the following is a specification.

This invention pertains to a scafioldchair, and is designed for use preferably in connection with window-worksuch, for instance, as cleaning windows or painting the woodwork thereof.

In working about the window it is customary to sit on the window-sill and support ones self by holding onto the windowframe or to the rails of the sash, which is not only inconvenient, but also dangerous, for the reason that one hand must be employed in holding onto the window while the other hand carries on the work, and there is also the danger oflosing ones grip while carrying on the work, causing the person to overbalance and fall. Straps are sometimes used for the pur' pose of fastening the body to the windowframe; but there is the danger of the strap becoming unhooked, or if the strain is too great the strap will sometimes give away, and for this reason this form of safety-guard is objectionable. It has also been found to be dangerous that where persons are either han ging clothes from a window on a pulley-line or shaking or dusting garments or rugs their feet sometimes slip or they lose their balance and fall out of the window.

The object of this invention is to provide a guard to prevent falling out of the window either when sitting on the sill or when leaning thereout.

A further object is to provide a support to the back when sitting on the window-sill on the outside of the window.

In carrying out these objects I provide a chair-frame which is securable to and detachable from the window, preferably on the inside of the sill or to the floor underneath the window, and this frame serves as a guard against which to lean or a back-rest when sitting on the sill. I further provide the chair with an extensible back, so that it may be accommodated to the person in either a sitting or a standing position. This back may be lowered when it is desired to use the deuse by having its hooks or bolts n n insertvice as a guard against which to lean out of the window, or it may be raised to any desired height for either leaning against when seated or standing against when standing on the window-sill.

In the drawings accompanying and forming a part of this specification, Figure l is a perspective view of a window-sill, a portion of the stile, and the chair applied thereto and having the back extended. spective view of a chair removed from said window and having the back lowered.

Similar characters of reference indicate like parts throughout the drawings.

The chair A comprises two upright members b and 0, each of which is formed at their upperends in eyes (Z and e, and these uprights are united bya' cross-rib f, and the horizontal sill-bearing pieces h 11 are connected by a cross-rib g. The lower portions h and 2' of said uprights b and c are at an angle to their upper portions,and each terminatesin a downwardly-bent portion is and Z, the free terminal of each of which is bent laterally and away from each other. as at m and m, so as to form a hook or bolt. '71 and n. Carried by the up per portion of said uprights Z) and cand movable in the eyes (Z and e is a member 0, having arms 1) and 17, each of which terminates in an eye q and qfl'and these surround the uprights b and c. Said uprights I) and c and the arms 1) and p are each bent at their free ends toward the eyes thereof, and said arms and uprights are also curved concentrically parallel, thereby permittiug'the member 0 to be placed in any position upon the uprights when it is desired to lengthen or shorten the back of the chair, and the concentricity of the curves of each of the members maintains the movable back portion in any positim: 1:- which the same is adjusted. By having the extremities of each of the members bent toward their eyes it will be seen that the uprights I) and c of the chair and the armsp and p of the movable member form side protec tors or arms for the body when seated in the chair. The cross-ribf serves as a support for the back, while the lower cross-rib g is formed to support the chair at the outer sill B, which is lower than the subsill O.

This chair is secured to the sill when in Fig. 2 is a per ed, preferably, through eyelets 1', which are shown as secured to the inner apron D of the window.

In applying this scaffold-chair to the window the hooks .n n are inserted laterally in the eyelets r on the inside of the window while the chair is in an upset position. It is then turned back onto the sills, when one side of the chair will be close against the stile of the Window-frame, and, as is obvious, lateral disengagement of the hooks from the eyelets is prevented. It is to be understood, however, that other forms of securing this chair to the window may be employed Without departing from the spirit of this invention and that the device may be made in any desired dimension for Whatever purpose intended. If necessary, a seat may be provided as well as a cushioned back, all of these details being within the scope of my invention.

It will be seen that the chair is a valuable adjunct to scafiolding and may be applicable to work other than window washing or painting. It may be used in connection with any scaffolding where it is desired to either guard a person while sitting thereupon or to form a rest for the back during the performance of progressing the work. It will also be noted that aside from forming a back-rest or chair for windows it also forms a guard against which a person could lean when it is desired to either lookout or work out of a window.

Having described my invention, I claim- 1. A scaffold chair comprising a frame adapted to be secured in position for use and having lateral supporting members; a backsupport mounted on said frame; a back-rest extensible on said frame, certain portions of said rest also forming side guards, and hooks for securing the chair in position for use.

2. A chair for scafiold use comprising a frame having laterally-extending supporting members; an extensible back-rest adjustable to different heights upon the frame; guards forming side arms for the chair, and means for securing the chair in position for use.

3. A scaffold chair comprising upright members; laterally-projecting bearing-pieces connected to said upright members; ribs connecting said upright and lateral members; hooks carried by said frame for holding the same in a position for use and an extensible back mounted upon said frame and adjustable to any position thereon.

a. Ascafiold-chair comprising two uprights united by cross-pieces and having eyes at their upper ends and hooks at their lower ends and a back-rest carried in said eyes and extensible upon the uprights of said chair.

5. A chair for scaffold use, comprising uprights united by cross-ribs and having eyes and an extensible back movably mounted in said eyes, said back also connected at its lower end to said uprights, and being adj ustable upon said uprights.

6. A chair for scaffold use, comprising two uprights joined together by cross-pieces one of which supports the chair in position; and the other forming a back-support; an exten sible back mounted upon said uprights and being adjustable to any height.

7. A chair for scaffold use comprising a pair of uprights united by cross-pieces, an extensible back carried by said uprights and shiftable thereupon, certain members of said back also forming side guards for the chair.

8. A chair for scafiold use, having a pair of uprights united by cross-pieces; an extensible back carried by said uprights and adjustable thereupon, certain members of the back also forming adjustable side guards for the chair and means for securing the chairin position for use.

9. A chair for scaffold use comprising uprights united by cross-pieces and the upper ends thereof terminating in a bow and eye; a back-piece mounted in said eyes and terminating at its lower ends in a bow and eye, said back-piece being carried by said eyes and extensible upon the uprights and forming adjustable side guards for said chair.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2805103 *Apr 20, 1954Sep 3, 1957Casimer JovaisWindow scaffold
US7931336Aug 30, 2010Apr 26, 2011Cushion Seats, Inc.Stadium seat
Cooperative ClassificationA47L3/04