US763545A - Sash-pulley. - Google Patents

Description

No. 763,545. 7 PATENTED JUNE 28, 1904.

J. DUFFY.

SASH PULLEY.

APPLICATION FILED AUG. 7, 1900- NO MODEL. 2 SHEETSSHE ET 1 No. 763,545 PATENTED JUNE 28, 1904.

J. DUFFY.

SASH PULLEY.

APPLIOATION FILED AUG. 7, 1900.

N0 MODEL. I 2 SHEBTS-SHEET 2,

' firmly secured to the frame or wall without 7 UNITED STATES Patented June 28, 1904.

PATENT OFFICE.

SASH-PULLEY.

SPECIFICATION forming part of Letters Patent N0. 763,545, dated June 28, 1904;.

Application filed August '7, 1900.

To all whom it may concern.-

Be it known that I, JOHN DUFFY, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Sash-Pulleys, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to sash-pulleys, and has for its objects to provide means for securing together two disks forming a pulley in such manner that their axle-apertures shall be exactly concentric to form in the pulley a long bearing for the axle hub or bushing, to provide a supporting-casing for the pulley having means by which it may be quickly and the use of screws or nails and without bending or binding against the wheel and by which it will conceal the mortise in which it is driven.

Having these ends in view, my invention consists of the means hereinafter described and claimed with reference to the accompanying drawings, in which like letters designate the same parts throughout the several views.

In the drawings, Figure 1 is a side view of my improved pulley; Fig. 2, an edge View, partly broken away, of one of the disks forming the pulley; Fig. 3, a detail side View of hub or bushing, showing its form after it has been flanged, but separate from the pulley; Fig. 4:, a plan view of a blank from which the pulley-casing is formed; Fig. 5, a side view of pulley-casing with pulley therein; Fig. 6, a front view of same parts, showing the faceplate; Fig. 7, a rear view; Fig. 8, a top plan view; Fig. 9, a section of pulley-casing on line :0 m of Fig. 7; Fig. 10, a side view of a modified form of casing, and Fig. 11 a sectional view on line 1 y of Fig. 10.

Referring to the drawings, A is a pulley mounted on an aXle B, fixed in a casing or shell 0. This casing is longitudinally corrugated and is adapted to fit into a suitably-shaped mortise in the window frame or wall.

The pulley A is formed of two steel sheetmetal disks D D. Each disk is provided with a central aperture formed by slitting the disk through the center and punching in from the ends of the slots the parts thus separated with- Serial No. 26,180. (No model.)

out removing any of the stock, so as to form a number of long inwardly-projecting tongues or wings (Z, which extend approximately to the corresponding Wings of the other disk when the two disks are brought together. A long bearing is thus formed for a hub or bushing E. These tongues serve to hold the bushing firmly in place by frictional contact due to thespring-pressure of the tongues against the bushing when the latter is forced into place without the necessity of expanding or flaring the ends of the bushing, as is the case with nearly all other pulleys. After the disks have been placed together and the hub or bushing is inserted to form the pulley an annular bur or flange e is broken down from the hub, near each end thereof, outside of the disk. These flanges fit into the hubopenings and fill the uneven contour thereof formed by punching in the disks to make the openings and the wings, and thereby rigidly hold the hub or bushing within its bearing,

not only insuring against longitudinal movement, but also preventing rotary motion in its bearing. This mode of engagement of the bushing and disks by doing away with the usual expanded ends of the bushing provides a longer bearing for the axle-rivet. The disks are locked together by means of engaging eyelets and tongues. In each disk is a series of plain circular eyelets f, formed by punching out and removing the stock, and a series of punched-in holes formed by cutting crossslits in the disk and punching in from the base of the slits the parts thus separated without removing any of the stock, so as to produce a circular series of tongues g, projecting inwardly from the disk. These tongues are adapted to protrude through a correspondingly-situated eyelet f in the opposite disk and to be clamped down upon the disk, the arrangement of the tongues in a circle producinga close fit in the eyelet and giving a centering action to the tongues and eyelets, thus insuring the junction of the disks with the edges of the outer perimeter and the edges of the center holes alined, respectively, parallel and concentric, thereby causing the pulley to run true on its axis when in place.

The pulley-casing C is provided with the longitudinal corrugations or segmental protuberances H for the purpose of retaining it within the mortise, and they also strengthen it. The face-plate I of the casing is provided with flat end extensions 71. In the main form of the casing it is provided with straight portions 71. on its sides extending rearwardly from the plate for a short distance.

At the outer ends of the corrugations H, in the grooves or depressions thereof, are cut or sheared a series of holes or slits h to separate the ends of the corrugations from the faceplate, except on the raised portions thereof, and to thereby provide a face-plate straight and regular along its edges. 1

The casing is adapted to be fitted into either a mortise having straight sides and round ends or a mortise formed by a series of intersecting holes corresponding to the shape of the corrugations, and the objects of the slitted sides having the straight-edge plate are to cover up the irregular contour of the mortise beneath the plate and to enable the casing to closely fit throughout its length the latter form of mortise above described. In the main form of the casing the slots in the sides are formed by cut-out portions intermediate the straight portions and the ends of the corrugations. In the modification shown in Figs. 10 and 11 slits merely are cut in the sides directly adjacent the face-plate in the depressed portions of the corrugations Without forming any straight portions. In the former construction of the casing after insertion into the mortise the straight portions are then driven into the Wood of the frame. struction the face-plate is forced in flush with the frame without driving any part of the sides into the wood. In Fig. i the casing is shown in its blank. This blank is folded together to form the completed casing, and the longitudinal top edges and bottom edges, respectively, of the sides will be brought close together, so as to abut when forced into a mortise. Each edge of the top and bottom portions is provided with transverse indentations j, which extend but a short distance from the edges and are confined to the top surface and the bottom surface, respectively. These transverse indentations serve to engage the frame and to strengthen the abutting edges. To prevent the abutting edges crowding past each other when the casing is bent-by insertion into a tight mortise, and thus bearing against and binding the pulley so as to prevent its revolution, the indentations or projections j of the opposite edges are made out of register, giving the same effect as though the casing were thickened on the ends. The inner edge of the face-plate I is turned inwardly to form a flange k, which extends around the face-plate, forming with the narrow edge of the face-plate and the narrow strip on the side above the holesa channel, which is one of the strongest designs in In the latter conmechanical construction and serves to prevent the tendency of the sides of a one-piece sheetmetal casing of light stock to press toward each other when set into a mortise, on account of the weakness of the face-plate caused by punching such a large slot as the wheel and rope require in all sash-pulleys. This feature therefore enables a larger face-plate opening to be made in the casing, and consequently prevents the wheel rubbing against the plate as it revolves.

The top and bottom corrugations of the casing extend freely under the end extensions of the face-plate. The outer ends of the top and bottom portions areslitted from their front edges back into the stock for asufficicnt distance to form on the opposite abutting sides a pair of tongues Z, which are adapted to be simultaneously driven into the wood by a single blow of a punch or similar instrument- In assembling and mounting the pulley the disks are first brought together and properly centered and the locking-tongues projected through the eyelets and riveted therein, whereupon the hub or bushing is inserted and its ends cut to form its locking-flanges. The pulley-casing is then bent into form from its blank and the pulley mounted on an axle fixed therein. The mortise having been bored or cut, the casing is pressed into the same until the straight portions of the sides reach the frame, if such portions are used, and then the casing is driven into the wood. \Vhen the casing is in place, each pair of tongues lat top and bottom is driven in by a single blow of a punch, so as to flare or spread apart the two tongues and cause them to engage the wood and securely lock the casing in the frame.

Y Having thus described my 1nvent1on, what I claim 1s 1. A sheave or Wheel formed of two similar parts and having central axle-apertures in said parts and rim edges which meet to form the run of the sheave or wheel, and means consisting of a series of circular apertures each provided with a circular riveting projection around its periphery in one or both of said parts and opposite, plain, cut-out, circular apertures to receive the said projections and which peripheries said projections are adapted to clamp whereby the central axle-apertures and the rim edges will be accurately centered and the two parts of the sheave or wheel immovably fastened together, substantially as described.

2. A sheaveor wheel formed of two similar parts having central axle-apertures and rim edges which meet to form the run of the sheave or wheel, means to fasten said parts together and to center the axle-apertures and the rim edges, consisting of a series of circular riveting projections in one or both parts, each projection split to form separate circularly-arranged tongues punched in from the ITO part without removing the stock, and plain cut-out circular eyelets in the opposite part to receive the projections. and in which the latter closely fit whereby the central apertures and rim edges will be centered, substantially as described.

3. Asheave or wheel having a central axleopening, a journal member therein, and separated tongues formed by the stock punched in to make said opening, extending inwardly from the edges of the opening and forming a long spring-bearing for said journal member, substantially as described.

4:. A sheave or wheel havingahub provided with aflange formed bya circumferential section struck from the outside of the bushing near each end thereof outside the pulley, leaving the interior of the bushing unshortened, substantially as described.

5. A sheave or wheel having punched-in tongues forming a hub-bearing and a central opening, and a hub-bushing having a struckout flange at its end fitting into the edge of said opening, leaving the interior of the bushing unshortened, substantially as-described.

6. A sash-pulley provided with a casing having a face-plate, corrugated sides and a series of slots in said sides between the corrugations, substantially as described.

7. A sash-pulley provided with a casing having a face-plate connecting the two sides and corrugations in its sides and straight portions in said sides intermediate the face-plate and the ends of the corrugations, substantially as described.

8. A sash-pulley provided with a casing having a face-plate and corrugations in its sides and straight portions extending inwardly for a short distance from the edges of the face-plate and slots cut in said sides at the inner edges of said straight portions, substantially as described.

9. A sash-pulleyprovided with a casing formed of a single piece folded together and having the edges of the top and bottom surfaces out of contact before insertion of the pulley into the mortise, said top and bottom surfaces provided with transverse corrugations running from the edges and confined to said surfaces, substantially as described.

10. A sash-pulley provided with a casing having an end portion fitting in an end of the mortise and having a central space in said portion, forming abutting edges, split holdingtongues in said end portion, on opposite sides of the space, their inner edge coinciding with said abutting edges, substantially as described.

11. A sash-pulley provided with a casing having top and bottomabutting edges providcd with transverse indentations, the indentations of the opposite edges being out of register, substantially as described.

12. A sash-pulley provided with a casing made of a single piece folded into shape having a face-plate and a continuous inward flange on the inner edge of said face-plate, substantially as described.

13. A sash-pulley casing having a face-plate and portions extended from said face-plate to form the ends and sides of the casing, the said extended portions being connected to the faceplate at the terminations of each side and being cut in said side portions adjacent the faceplate intermediate the terminations of the sides whereby the body of the side portions where cut is separated. from face-plate, substantially as described.

14. A sash-pulley having a face-plate and portions extended from said face-plate to form the ends and sides of the casing, the said extended portions connected to the face-plate at the terminations of each side, having corrugations at the junctions of sides and ends, and being cut in said side portions adjacent the face-plate intermediate the terminations of the sides, whereby the body of each sideportion where cut, is separated from the face-plate and the face-plate is projected over and conceals the said sides, substantially as described.

15. A sash-pulley casing formed of one piece of sheet metal having depressions in its sides and cuts or openings in said sides intermediate said depressions and the upper portion of the body of the casing, substantially as described.

In testimony whereof I aifix my signature in presence of two witnesses.

JOHN DUFFY.

l/Vitnesses:

FANNY (J. GORHAM, MARION R. Lowms.

Images