US1777373A - Window-worker's scaffold - Google Patents

Description

ct.7, 1930. F. J. L INDLoFF 1,777,373.

'WINDOW WORKER S SCAFFOLD Filed Jan. l0, 1929 N VE N TOR.'

Patented Oct. 7, 1930 PATENT oFFrcE FREDERICK J. LINDLOFF, OF CINCINNATI', OHIO WINDOW-WORKERS SCAFFOLD Application led January 10, 1929. Serial No. 331,427.

My invention relates to window workers scaffolds, and is intended for use by glaziers, painters, iron workers, window cleaners and others, who nd it necessary to perform work.

` on the outsides of windows, and is especially applicable in connection with metal windows, and particularly in connection with easement windows in which the sashes are hinged so as to swing outwardly.

1o It is the practice in the building trades to build metal easement windows into the wall of the building, and to glaze the sashes, paint the windows and perform other operations upon the same, after the metal easement win- V dows are in the wall. This necessitates work upon the outer faces of the windows, and, as the sashes swing outwardly, the outer faces of the windows are accessible only from the outside of the building. It has been the usual practice heretofore to perform the work upon the outsides of such windows from scaifolds which are suspended by ropes from the cornice of the building, which has been found to be expensive and dangerous, especially in work on windows of high buildings.

It is the object of my invention to avoid these objections, and to provide a convenient support at the outside of the wall at the window, so that a workman may be readily and safely supported at the outside of the window while performing work upon the window.

It is the object of my invention further to provide a simple and convenient support 3.5 for a scaffold board, and simple and convenient means for securing the support at the sill of the window, and to provide novel means whereby the parts may be adjusted for convenient location upon walls of diferent thicknesses and in situations where casements are differently placed in the window openings.

The invention will be further readily understood from the following description and claims, and from the drawings7 in which latter:

Fig. 1 is an outside side elevation showing my improved device in position of use, the

wall being partly broken away.

Fig. 2 is a plan section of thel same, taken on the line 2-2 of Fig. 1.

Fig. 3 is a vertical section of the same, taken on the line 3-3 ofF ig. 1, the window-V sash being` omitted.

Fig. 4 is a bottom view of my improved device.

Fig. 5 is a fragmentary section of my improved device, taken on the line 5 5 of Fig. 4.

Fig. 6 is a perspective view of a detail of the same; and, l

Fig. 7 is a fragmentary section of m improved device, taken on the line 7-7 of Fig. 4.

My improved device comprises a bar 11, in which there is an upward bulge 12, forming a lower recess 13, for receiving the lower cross-member 14 of the frame 15 of a metal easement 16, to which frame, the sashes 17 are hinged, as by means of hinges 18 so` as to swing outwardly with relation to the wall 19 of the building.

The bar is provided with a contact-part 21 at onek side of said recess for contacting the lower cross-member 14. This contactpart is preferably provided with a sharp contact-edge 22, for instance, a knife edge, which is arranged to gouge into the cross-- member for locating the contact-part on the cross-member. A clamp-screw 24 has threaded connection in the wall 25 of the bulge 12, the inner end of the clamp-screw being arranged to be clamped against the outer face of the cross-member. The inner end of the clamp-screw is preferably provided with a sharp end 26, arranged to gouge into the cross-member. These means rigidly secure the bar 11 to the Vcross-member.

A bar-extension 31 is provided for the 90, inner end of the bar. This bar extension is provided with an outward bulgeA 32, arranged .to be received about the inner portion 33 of` the window sill 34. The lower end of the bar extension is providedl with an adjustable A stop 35 arranged to bear upon the inner face 36 of the wall, for instance, upon thegiinish piece 37. The stop is preferably. in the form ofa screw 38 havingk threaded connection with the lowerend ofthe bar-extension, and 10C having swivel connection 39 with 'a contactplate 40, arranged to contact said inner face.

The bar-extension is adjustable on the inner end of the bar by means of screws V4l andVV nuts 42, the screws being received through;

, inner face the wall.

The onterend of the bar has a downwardly inclined outwardly extending portion 5l, from the outer end of which a supporting portion 52 o the bar extends toward the wall of the building. This support is arranged tosupport a scaffold-board 53. The supportn is preferably substantially lower than the portion of thea'bar which is received crosswise of their-window-sill so as to materially decrease the tilting strain upon the bar and the securing means between the bar, the cross-member of the Ycasing and between the bar-extension and the inner face of the wall.

The bar is continued upwardly from the inner end of Ythe supporting portion 52 thereof as a hanger-bar 54, the upper end of which is secnred to the bar l1, as by being provided with an angularly bent portion 55 secured to the ba by a rivet 56. An acute angle meinber 58 may also be located inthe acute angle between the downwardly outwardly slanting" portion 51 of the bar and the hanger portion 54 thereof. The angle member is riveted respectively to said bar portions by rivets 59, 60.

A brace 63 is provided for bracing the scaffold-board support against the'wall of the building. This brace is shown at the lower end of the scaffold. It is shown as a bar provided with a shoe 64 at its inner end, arranged to be supported bythe outer face of the wall and forming a stop foi-the outer portion of the scaffold. The brace is adjustable lengthwise of the supporting portion 52, as by' being slidable in straps 65 depending from the bar-portion 52 and forming loops about the brace. Therbrace is exemplified as an iron bar. It is provided with holes 66, in which a pin 67 is selectively received for positioning the brace withY relation to the scaf- Y fold-board support. The pin is axially movable in holes 68 in flanges 69, extending from the hanger-portion 54, for instance, from a short bar-70 suitably fixed to said hangerporiton. i i

The distance between the horizontal planes in which the bulge 12 and the stop 64 are located is substantially greater than the dis'- tance between the vertical planes in which said bulge and the inner end of said stop coacting with the outer face of the wall of the building arelocated, for minimizing tilting of thedeviceY in use.

The. support for the scaiold-board shown of triangular orm, the scaffold-board Ybeing located in the loop formed by the triangle, there being one of these supports at each side of the window. 'The supporting stretch on which the scaffoid-board is located, which corresponds to oneot' the angles oi the triangle, extends at right angles to 'the wall of the building. The hanger 54, which corresponds to the'other angle of the triangle, extends parallel with said wall. The bar portion 5l, whose position corresponds to the hypotenuse oi' the triangle, serves as a hanger and is so formed and located as not to interfere with the movements ot the workman.

This structure also locates the scaffoldboard in a low position with relation to the sill, for minimizing tilting strain on the fastening means, and for placing the scaffoldboard in such position that the workman may readily worlrupon the lower as well as the upper portions of the window. The struct-ure also permits the workman to be seated on the scaffold-board, with his legs hanging be-V tween the scaffold-board and the wall.

The bar portions of the device are prefer-- detached from the building, and enables theworlrrnan to work upon the outside of the window easement while the sashes are substantially closed.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is: V l. A device of the character described comprising a sill-bar, said sill-bar provided with an upward bulge at its outer portion, said sill-bar having an inwardly extending portion and an outwardly extending portion respectively extending inwardly and outwardly from said bulge, said outwardly extending portion of said sill-bar being lower than said inwardly extending portion thereof, a gouging knife-edge at the inner portion of said bulge, a clamp at the outer portion of said bulge, said gouging knife-edge and said clamp acting in opposite directions, a depending support depending from said outwardly extending portion of said sill-bar, a depending clamp depending from said inwardly extending portion of said sill-bar, and means between said depending clamp and said inwardly extending portion of said sill-bar for adjusting said depending clamp toward and from said bulge.

2. A device of the character described comprising a sill-bar, the outer portion of said sill-bar provided with an upward bulge, said sill-bar having an inwardly extending portion extending inwardly from said bulge and an outwardly extending portion extending outwardly from said bulge, said inwardly extending portion provided with an outwardly acting gouging knife-edge, the outer wall of said bulge extending lower than said ,gouging knife-edge, adjustable clamping means in said outer wall below the level of sai-d gouging knife-edge, said gouging knife-edge and said clamping means acting in opposite directions, a support for a scaiiold-board depending from the outer end of said sill-bar, an adjustable stop acting inwardly at the lower edge of said support, the distance between the horizontal planes in which said bulge and said stop are located being greater than the distance between the vertical planes in which said bulge and the inner end of said stop are located, and clamping means at the inner end of said inwardly extending portion of said sill-bar.

In testimony whereof, I have hereunto signed my name.

FREDERICK J. LINDLOFF.

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