US723252A - Sash-pulley. - Google Patents

Description

PATENTED MAR. 24. 1903.

P. DOSGH. SASH PULLEY. APPLICATION FILED Nov. 25, 1902.

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IUNITED e STATES4 PATENT Fries.

PETER BOSCH, OF YONKERS, NEW YORK.

SASH-PULLEY.

SPECIFICATION forming part of Letters Patent No. 723,252, dated March 24, 1903.

Application filed November 25, 1902.

` To all whom it may concern:

Be it known that I, PETER DOSCH, a citizen of the United States, and a resident of the city of Yonkers, county of Westchester, and State of NewYork, have invented a new and useful Improvement in Sash-Pulleys, of which the following is a full, clear; and exact description, reference being had to the accompanyl y the pulley-wheel.` Fig. 7 illustrates a'detail of the method of uniting the side plates and `the face-plate, taken on the line 7 7 of Fig. 2.

This invention is an improvement 'upon the sash-pulley patented tome in United States Letters Patent No. 709,000, dated `September 16,1902. The pulley aesribed'inthatpatent 3 is perhaps the best form of pulleyof its class l l. known to me, yet in some respects capable H e e of further improvement, 'whereby certain of `the parts are veryfgreatly strengthened and l `adapted to be usedin conjunction-with heavy sash without distortion of any of -the parts of j :the structure, or if theimprovements are added to sash-pulleys adapted to ordinary use then their life is very greatly extended at a comparatively trivial cost-that is to say, the

"wearing of the friction-surfaces between the "wheel and the fastening of the pulley, owing tothe fact that dust and grit are almost al- `ways present and it is impossible to lubricate ,the joint, soon wear away the contacting parts if made of the material and of the weight or thickness ordinarily used in constructing the `usual metal pulleys. These present improvements therefore' consist in means whereby these wearing parts are made strong, durable,

and consequently long-lived, at a very trivial My invention Valso embodies certain other l. j l features,which will be hereinafter specifically referred to.

Serial No. 132,732. (No model.)

Referring now to the drawings, A is the face-plate. B B are the side plates. 'llhese two parts are connected together as shown in Fig. 7-tl1at is to say, when cutting the opening through the face-plate the metal is slit longitudinally, and then at each side of the slit'a ange or lip O (see Fig. l) is bent downwardly at right angles to the plane of the face-plate.- The side plates, on the other hand, when cut are formed with projecting tongues D, which are bent subsequently at -right angles to the plane of the side plates and are passed through holes punched in the iianges C C of the face-plate, and are then slightly upset, as usual, to hold the parts together. This construction unites these two parts together in a very inexpensive, secure, and desirable manner. Y

As formerly constructed the screw-holes have been made through the metal of the face-plate by simply punching a hole therein, and if this metal is-thinfas it may `well be and still have requisite strength, it will sometimes happen -that the screw-head, particularly if the window-casings are hard wood, will squeeze the thin metal so hard as to distort the i face plate somewhat, and if' the screw-heads are not large sometimes the metal will be drawn by the pressure of the screw so that the screw-headV will break through it or partially split thelmetal. In order, therefore, that the screw-head may have a substantial and suitable seat inwhich to rest, I swage the metal adjacent to the screw-heads, as shown in Fig. 5. f

A indicates the face-plate proper, as before, and Ethe screw-hole. It will be seen that the metal has been made funnel-shaped by `throwing up the rib F, surrounding the opening G. I thus provide a suitable seat for the head of the screw, the area of the metal contacts being substantially as, great asthat of the entire side of the screw-head.

Referring now to the means employed by me for reinforcing the-:contact or frictional surfaces between the wheel and the pulley ,proper and referring first to the wheel, H is the wheel, made in halves, as usual, the halves being connected togetherby rivets I or in anyV other suitable manner. I punch out from the center of the wheel a square ICO opening, `and in so doing I throw outwardly certain lips K K and then form for each of the halves of the wheel a bushing L, (see Fig. 4,) which preferably has a fiat part M and a cylindrical part N, provided with an opening or access-hole O. This bushing is preferably made of case-hardened steel relatively heavy and is set into the square opening in each side of the wheel, so that they are presented to the right and left, as shown in Fig. 2, and are held firmly in position by bending over the lips K K, or instead of employing the lips K K, I may pass rivets P P through the two thicknesses constituting the wheel and also through the two thicknesses composing the flanges of the bushings. The construction in which I employ the lips K K is shown at the upper side of the bushings in Fig. 2 and that in which I employ the rivets P is shown at the lower side in the same figure. The side plates of the pulley are reinforced in a similar manner--that is to say, in Fig. 3, Q illustrates a square flange, and R a circular recess therein, perforated, as at S, for the passage of the pivot or axis T, substantially the same as shown in the case of the wheel, excepting that the sizes differ, so that the hub of the wheel may properly enter and work in these bushings of the side plates. The latter -are made of relatively thick case-hardened steel, the same as the bushings which constitute the hub of the wheel, and they may be conned in position by the employment of fingers K' K', cut out from the metal of the side plates or rivets P P, as shown in Fig. l.

'It will be understood that the wheel revolves upon its hub and not upon the axis T. The latter is employed merely to hold the side plates together and give rigidity and strength to the structure; For this reason the hole O through the ends of the hub is made larger than the diameter of the axis, as shown in Fig. 2.

It will be obvious to those who are familiar with this art that modifications may be made in the details of construction of the invention without departing from the essentials there,- of. For example, it is not essential that the bushings be made of case-hardened steel, for if they are of material heavier and stronger than the material composing the Wheel and the side plates, respectively, they will materiallyadd to the life of the pulley, and, on the other hand, if they are made of the same material as that employed in the construction of the wheel and side plates, respectively, but

n are case-hardened, the life of the structure will likewise be prolonged, nor is it essential that the bushings be made in the form illustrated by me. They may be mere sections of tube sawed off of the proper length and suitably fastened to the wheel and side plates, the side plates being held together in some suitable manner. Indeed, they may be made in a Variety of forms. The essence of the invention in this respect is that I differentiate the material employed for the hub of the wheel and for its bearings in the side plates from the vastly greater amount of material employed for the construction of the Wheel itself and the side plates themselves, whereby I eifect a substantial economy and very greatly prolong the life ,of the device, and in order that the claims hereof may be simplified and thereby reduced I shall refer in them to the hub of the wheel and to the bushings of the side plates as reinforced, meaning thereby to cover and include these parts when made separate and distinct from the other parts of the wheel and side plates, respectively, and havingthe characteristics above referred to.

I claim- 1. In a sash-pulley the combination of a wheel composed of two halves, each half having a reinforced hub-section projecting laterally therefrom, and side plates, each embodyling a reinforced bushing supported on the inside of the plate and projecting laterally therefrom.

2. In a sash-pulley the combination of a wheel having a reinfored hub provided with a laterally-extending circular projection, and side plates, each provided with a reinforced recessed bushing adapted to receive within the recess the appropriate end of the said hub.

3. A frame of a sash-pulley embodying side plates made up of struck-up sheet metal and a face-plate suitably' connected together, the side plates being provided with bushings made of case-hardened steel, said bushings being supported by the side plates.

4. In a sash-pulley a face-plate the screwholes whereof are swaged into conical form as shown by first presenting the metal forwardly beyond the front plane ofthe face-plate and then returning the metal rearwardly again whereby a seat for the screw-head is produced no part of which is beyond the rearward face of the face-plate.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PETER DOSCH.

Vitnesses:

PAUL A. ZIZELMAN, R. M. CALFEE.

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