US1589621A - Window-frame pulley - Google Patents

Description

Patented June 22, 1926i.

UNITED STATES CLAUDE EQBOWERS, OF LOS ANGELES, CALIFORNIA.

WINDOW-FRAME PULLEY.

Application led July 16, 1925. Serial No. 44,056.

This invention relates more specifically to a die stamped metal pulley block construe tion for placement in window frames.

An object of the inventionl is to provide a simple die stamped metal `sash cord pulley block that may be securely mounted in a window frame without the necessity of employing nails, screws or other extraneous fastening devices.

Briefly, vthe invention consists of a pair of complemental die-formed members adapted when secured together to form a pulley housing, pulley pivot pins serving to rigidly secure the members together. Each member which Jforms the housing of the block is provid-ed on one end with a semi-circular flange, whereby the circular flange jointly formed when the members are secured together1 covers or closes the bore beyond the walls of said housing. Means are also provided for preventing a movement of the housing after an initial placement and consists in the preferred form of tapered oppositely disposed fins formed on the. outer surface of the housing members adapted to be forced into the window frame surrounding the bore for holding the block in position prior to forcing the securing device into the frame. yI he anchoring or block securing device consists of a pivoted member in the form of a latch having a sharp prong adapted to be forced into the hidden face of the wood casing to prevent tilting or other displacement of the block.

In the drawings wherein one embodiment is shown by way of example.

Fig. l discloses in side elevation a pulley block secured'in position in a window casing.

Fig. 2 is a top plan view of the device in position in the casing. n

Fig. 3 is a front elevation of the device 1n position.

Fig. 4 is a view taken approximately on the line 4-4 of Fig. 3 showing in elevation the inner side of one of the members constituting the housing, with the pulleys in position. p

Fig. 5 is a rear elevation of the assembled device.

Fig. 6 is an enlarged cross section through the structure taken on the line 6-6 of Fig. 2.

The pulley block comprises a housing consisting of two complemental die formed sheet metal members l0, each of which has a vertical side wall provided with horizontally disposed top and bottom flange 12. These members are assembled in opposed relation with the edges of the flanges l2 abutting, and this relation is maintained by means of non-rotatable pivot pins 13 and .14 for the pulleys 1.5, the ends of the pins being shouldered at 16 (Fig. 6) to properly space the walls l() and permit free operation of the pulleys. The forward or outer end of each housing is provided with a semicircular flange 18 the upper portions of which are braced by means of inclined integral fins 20 extending upwardly from the edges of the flanges 12. This construction of each Vof the members l0 permits the same to be stamped readily from sheet metal thereby materially reducing the cost, while the pulleys may be easily and cheaply machined from a metal rod. As shown in Fig. l, the pins carrying the pulleys are located in and adjacent the bottom of the housing to permit of a fre-e passage of the sash cord over the pulleys when the block is installed.

When the parts are assembled as-shown, the two semi-circular flanges 18 cooperate to form a circular llange which, when the device is installed in a circular bore 24 formed in a window casing 25, completely covers the outerv end of the bore 24, and also prevents a tilting action of the device when a downward pull is exerted on the same by the sash weight.

For the purpose of securely anchoring the device in the window frame one end of the pivot pin 14 is extended sufficiently to receive a pivoted arm 26, its outer end being bent transversel away from the vertical wall of the housing in order to form a oonvenient means `for driving the sharpened prong 30 formed on the arm into the window casing below the opening 24 as shown in Fig. l.

In installing the device, a single circular bore 24 is drilled in the window casing 25, this operation being quite simple, andthe diameter of the bore slightly greater than the vertical diagonal of the housing l0. The device is then inserted in the bore in a vertical position and driven inward until the ilanges 18 bear upon the outer face of the casing, the ns 20 being thus forced into the wood at the edges oi' the hole, whereby movement of the device in the bore will be prevented prior to driving the securing prong in place. The latch 26 is driven downwardly by a blow of a hammer from the position shown in dotted line in Fig. l to force 'the prong 30 into the wood below the bore 24 as shown, whereby rocking of, or displacement of the device in the bore will be prevented. The structure is then ready to receive the sash cord 3l one -end of which is secured to a window sash and the other to a sash weight of usual form.

As the device is die formed from sheet metal it may be quickly `and cheaply manufactured. Further as it vcarries its own securing means the expense oil providing nails, screws or like independent securing means is obviated, and moreover as only 'a single circular bore in the 'window frame is required further economies are effected in its installation.

lWhat I claim is:

l. A pulley block comprising a Vpair of metallic members adapted when placed together to form an opening extending therethrough, combined rivet and pulley pins eX- tending transversely through said members to rigidly secure the same together, ametal pulley journalled on 'each pin within the opening, and means pivotal'l'y mounted on 'one oi said pulley-pins .for securing the block to a support.

2. A `pulley block construction compris- 'ing a die formed metal Ahousing having an opening extending therethrough, one end of said housing provided with Van outwardly l'extending flange, said housing having means formed thereon for preventing a displacement of said housing when mounted in a bore of a window frame, a pulley pin mounted in said housing across said opening, a sash cord pulley mounted on said pin, and a block securing prong pivotally mounted on said pulley pin.

3.1i pulley block construction comprising a die formed metal casing having an opening extending therethrough, a pulley pin transversely mounted in said casing, a sash cord pulley mounted on said pulley pin for rotative movement in said opening, said pulley mounted in the lower portion of said opening, whereby to provide space thereabove for the passage of a sash cord therethrough7 and a prong pivotally mounted on one end of said pulley pin 'adapted to be driven into the wood support in which the pulley block is mounted for securing the same in lined engagement therewith.

e. A pulley block construction comprising die lormed complement-al members adapted when secured together to form an opening extending from one end to the other, a pin extending across said opening adapted to secure the members in Vfixed relation to each other, a sash cord pulley mounted on said pin, and a securing prong pivotally mounted on one of the ends of said lpin for securing the block in rig1d engagement with its support.

CLAUDE E. BWERS.

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