US818231A - Sash-pulley. - Google Patents

Description

No. 818,231. PATENTED APR.1'7, 1906. D. G. CLARK.

SASH PULLEY.

APPLICATION FILED MAY5,1905.

INVENTOR. flW/GHT 6 614 EV W v A TTORNE Y5.

DWIGHT G. CLARK, OF PLAINVILLE, CONNECTICUT.

SASH PULLEY.

Specification of Letters Patent.

Patented April 17, 1906.

Application filed May 5, 1905. $erial No. 259,002.

T0 at whom it may concern:

Be it known that I, DWIGHT G. CLARK, a ci tizen of the United States, residing at Plainville, Hartford county, State of Connecticut, have invented certain new and useful Improvements in Sash-Pulleys, of which the following is a full, clear, and exact description. My invention relates to improvements in sash-pulleys, and particularly to the pulleyframe and sash-cord guide.

The object of the invention is to provide an improved construction and means of assembling and securing a face-plate to the rear portion or case in such a manner that the strains of use will be effectively withstood. Incidentally simplicity and economy of production are aimed at.

In the accompanying drawings, Figure 1 is a side elevation of my invention. Fig. 2 is a plan view thereof. Fig. 3 is a horizontal sec tion of the case and face-plate shown in Figs. 1 and 2. Fig. 4 is a view of the inner side of the face-plate detached.

1 is a face-plate formed of sheet metal and provided with an elongated or oval slot in its face. slot is countersunk or extended back to form a centering member including two flanges 2. It will be seen that this centering member is in common to all of the modifications shown in the drawings.

3 is the case proper, formed of sheet metal from one or more pieces, as desired. The case 3 is oval in end elevation and is arranged to hold between its side walls the pulley 4, the latter being mounted on a pivot 5. The case 3 is centered by the aforesaid centering member when the parts are assembled, so that it is always held in the proper position relatively to the face-plate and cannot slip. In the preferred form the side edges of the case 3 are bent outwardly, as at 3 3 and then given a sharp inward bend to form a shoulder bearing against the back plate 1 and against the sides of the centering device. (See Figs. 1 to 3.) The said edges 2 2 of the latter are then expanded outward, so as to clamp the edge of the case securely in place and so as to bear against the inner wall of the 1 bends 3 3 to reinforce and further strengthen and support said case. This is the preferred form of the invention and is of great value, since it provides a neatly-rounded bearing at the inner edge of the face-platel for the sashpulley 4 and prevents chafing the sash-cord.

Instead of providing the outward bend 3 The metal displaced in forming said at the side edges of the case 3 this may be eliminated, as shown in Fig. 4:, said side edges being arranged parallel throughout, save at the extreme forward edges, which are turned abruptly in, as at 3 3 to provide a seat for the turned-back flange 2 of the face-plate 1. By this means the parts may be secured together simply and inexpensively, and, as before, a rounded bearing is provided at the inner edge of the face-plate for the pulley or sash-cord, or both.

In Fig. 5 instead of providing the side edges of the case 3 with an, inward bend, as shown inFigs. 3 and 4, I flare the same outwardly, as indicated at 3 3. The centering means is present, as before, while the extreme outer side edges of the plate 1 are folded back, as at 1 1 and down upon the flared edges 3 3 of the case, securely holding and uniting said parts. In this case the rounded bearing is also provided in a measure for the pulley or sash-cord, or both.

It will be seen that very substantial advantages are gained by this combination and arrangement of parts, since not only are the same securely held, but a permanent and uniform position is given to the two main mem bers 1 and 3. Beyond this the flanges 2 2, in addition to centering and supporting the side Walls of the case 3, perform the function of stiffening the plate 1, permitting the use of thinner metal than would otherwise be practicable. The invention also admits of the useful disposition of metal that would otherwise be wasted in striking out the oval hole in said face-plate. While in the preferred form the case 3 is made of a single piece of metal, obviously this is not essential to the invention; but it will be seen that when the same is made up of a plurality of pieces the same separate parts. will be more effectively held by the construction set forth above than would be the case were no centering means or flanges 2 2 provided.

What I claim is 1. In a device of the character described, a face-plate having an elongated slot therein, a portion of the metal displaced in forming said slot being extended rearwardly and forming a stiifeningweb extending entirely around said slot and also forming a case-centering device, a case bearing on the outer side of said centering device, a portion of the metal of said faceplate being bent down to afford means for clamping said case securely against said face-plate the side edges of said case being bent outward and doubled back beneath the bent-down portion of the face-plate.

2. In a device of the character described, a face-plate having an elongated slot therein, a portion of the metal displaced in forming said slot being extended rearwardly and forming a stiffening-web extending entirely around said slot, and also forming a case-centering device, a case bearing on the outer side of said centering device and means for clamping said case securely against said face-plate, said means comprising long flanges at the opposite side edges of said case substantially at right angles to the body of the case, and a turned-back-portion of the stifl'eningweb of DWIGHT G. CLARK.

Witnesses A. V. BRooK, N. E. CLARK.

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