US94945A - Improvement in sash-pullets - Google Patents

Description

" To all whom "it may concern.-

t@ flifytlliw.;

l ,l CHARLFISVB. CLARK, OF" BUFFALO, YORK.` Y

' i Letters Patent No. 94,945, drted September 21, 1869. l

IMPROVEMENT In sAsH-PULLEYS.

The 'Schedule referred to in these Lettexsratent and making part of the same.

Beit knownthat -I, `CHARLES B. CLARK, 'of the city of Bualo, county of Erie, and State :ofvNew York, have invented a new and useful Improvement `in Window-Sash Pulleys; and I do hereby declare' the following to be a full and exact descriptionthereof, reference being made to the 'accompanying drawings, making part `of this specification, in which- Figure I is a plan, with the Vcap and wheel removed. A.. M l 'Figure II is a similar view,`with the wheelin posion. Y

Figure`III is a plan of` the pulley complete.

Figure IV is a side 'elevatioin with the cap or case ieznoved.

Figure V is a central longitudinal section of Fig. 1V.

Figure VIv is a transverse section in line Y Y.

Figure VII is a side elevation ofthe pulley complete.

Figure VIII is a longitudinal section of the easei portion in line Z Z. Y

'Like letters of reference designate like partsin each of the figures.' i

My improvement belongsito that class of .axle-pulleys, the frame orcase of which is divided into two parts, the division extending theA length ofthe base and through or near the axle-bearing; and

The improvement consists in providing one part of the case with projecting disks or flanges, which slide into corresponding recesses in the other part, when, the pulley is complete.

The object of my invention is toform an axle-pulley that canpbe easily cast, and readily put together,

as shown in Figs. II,`IV, and VI.

The case E is also provided with semicircular, b earr ings, L Lwhich, when the pulley is together, enclose .the journals D D, of the Wheel I.

i The case E is further provided with disklike Aprojections, A A,as seen in Figs. VI, VII, and VIII.

These ear-like projections overlap the corresponding portions B4B, of the upper edge ofthe flanges K of the base F. l l

The thickness of theseV flanges may be increased around the recessed portions B, as shown at J J, so as'to beiush with the face. of the ears A.

. The ends ofthe base-part F have countersinks, G

G, to receive the heads of screws by which the pulley is secured to the frame.

. These countersinksare deepened h'y circular anges, as seen at G G, which extend through apertures, H H, in the ends of the case E.

The case Eand base F are held together by the friction fof the ,disks A A against the face of the recesses B B, which friction is'eiected by simply pressin g the case E over the base-portion F. By slightly narrowing the distance between the disks A A, the

sides of the casel E' ivill yield enough to make the adhesion of lthe parts very lil-m.

The disks AA A may be cast on the baseportion F,

but are preferably cast on the case.

The axle-bearings can also beV made` wholly .either -in the base or caseportion of the' pulley. Y

I am aware that axlepulleys` are in use having the case divided into twol parts, at ornear the bearing of the axle. Butso Vfar as I know, they are all cast loosely, and the parts will not, unless riveted, hold together before being adjusted to the lframe. This is great inconvenience' to builders, and riveted vpulleys are in consequence preferred.

My method remedies this objection, and lI am enabled to produce a compact, light, and durable article,

equal to any, and inuch cheaper thanthe drilled-' andriveted variety. Besides, the castings of each size will all'interchange, being cast so as to require no tting or finishing. This is an essential feature, as any part broken by accident or otherwise can be readily replaced, and only the broken part lost.

In pulleys with ,double base, the plates are required to be thin, so that-together, they willnot be so .thick as to mortise too deeply in the framel Countersinks made in these plates are so shallowas to require a certain-sized 'scre`w-head. 'I f too large ahead, it

will protrude so as to interfere with 'alle working of the sash; and if too small a head, it will pass through the countersink. Y

I obviate this difficulty by making, the countersinks `vthe depth of both plates combined, allowing a great range of screws to be used, while I strengthen the outer. plate and prevent its liability to break.

I do not claim, broadly, dividing the case of an axlepulley into two or more parts, .as I am aware that .this is not new; but 'i What I claim as new, and desire to secure by Letters Patent, is'-- The overlapping ears A A of the cap, combined and operating withA the corresponding portions B B of the base-portion, Substantially as set `forth.

' Witnesses: CHARLES B. CLARK.

E. G.CLARK, 1 C. I-I. GAMER.

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