US658781A - Sash-cord guide. - Google Patents

Description

No. 658,78l. Patented Oct. 2, I900.

W. T. KELLUGG.

SASH CORD GUIDE.

(Application filed Aug 4, 1899.)

(No Model.)

THE;

UNITED STATES PATENT rFioE.

WARREN T. KELLOGG, OF'LANSINGBURG, NEW YORK.

S ASH'-CORD GUIDE.

SPECIFICATION forming part of Letters Patent No. 658,781, dated October 2, 1900.

Application filed August 4, 18 99.

To all whom it may concern.-

Be it known that I, WARREN T. KELLOGG, of the village of Lansingburg, county of Rensselaer, and State of New York, have invented new and useful Improvements in Pulleys for Sash-Balances, of which the following is a specification.

This invention relates to sash-balance cases and the pulleys used therein; and it consists mainly in the construction and combination of the same with a pair of fixed tubular struts arranged end to end on the pulley-shaft and bracing the walls of the case from the inner side, the pulley being made with two disks diverging at the middle to provide two circular bearings which respectively turn on the said struts, substantially as set forth.

The object of my invention is to form a bearing for the pulley by means of two endflanged tube-form struts, of which there is one inserted in the central passage of each of the disks, with the inner entered ends of thestruts in abutting contact and with the flange on the outer end of each of the struts resting against the inner wall of the case to which the flange is next adjacent, with the axle entered within the passage formed by the tubeform struts, with each of the axle ends where projecting through and beyond the walls of the case riveted thereat.

Accompanying this specification to form a part of it there is a plate of drawings containing seven figures, illustrating the application of my invention, with the same designation of parts by letter reference used in all of them.

0f the illustrations, Figure 1 is a side elevation of a sash-balance containing a pulley made according to my invention. Fig. 2 is a section taken on the line was of Fig. 1. Fig. 3 is another cross-section taken centrally and vertically through a sash-balance containing my invention with the parts shown in a larger size than in Fig. 2. Fig. 4 is a side elevation of one of the disks with what is its inner face when in place to form a part of the pulley shown as facing the view. Fig. 5 is a side elevation of what is the inner face of the other disk when in position within the pulley shown as facing the view. Fig. 6 is a side elevation of one of the struts, and Fig. 7 is an end elevation of one of the struts with Serial No. 726,093. (No model.)

what is its flanged end shown as facing the View. I The several parts of the sash-balance thus illustrated, as well as those parts of it containing my invention, are designated by letter reference, and the function of the parts is described as follows:

The letters D D designate the disks from which my improved sash-balance pulley is formed. Each of these disks has what constit utes a convexity O, which is rounded outwardly and in revolution about the axle-opening 0, with those portions of this convexity in each of the disks at (1 made to curve inwardly toward each other when the disks are placed back to back, so that the inner surfaces of the disks so placed will meetat 01 with that portion of each of the disks where extending beyond their contact each made to curve outwardly at 61 so as to form one-half of the sash-cord groove G, and each having formed upon its rim the outstanding lip L, so positioned to prevent the rim edges of the disks from chafing or cutting the sash-cord.

Each of the disks D has made in it at diametrically-opposite points the holes h h and the sinks S S, all.of which are formed in the fiat part of the disks where indicated to be in contact on their inner faces at 0Z These sinks are projected inwardly from the outer faces of the disks, so that by placing the disks back to back the sinks of each of the disks will enter the holes of the other, and whereat the sinks can have their entered ends spread out, so as to overlap the edges of the holes, and thus connect the disks, as shown at N, Fig. 3, or, if desired, the entered sinks may be centrally punched, so as to have their thusexpanded edges overlap the inner edges of the holes in which entered, and thus connect the disks, as shown at M, Fig. 3.

The letters T designate the struts, of which there is one entered through the opening 0 of each of the disks, with the inner ends of these struts abutting at T and with their flanges F each upon the outer side of the disk in which placed, with its flange resting upon tact to form the bearing for the axle.

of the axle where extending through and outside of the walls of the case headed or riveted at R, by which the walls of the case are securely held against the strut-flanges and the struts held with their abutting ends in con- The side walls of the case around the passages P are inwardly dished, so that the rivet-heads of the axle come flush, or approximately so, with the outside of the said walls. disks D are spread apart in the middle, as shown, so that the walls of the central holes 0 formed in them constitute two annular bearings, which are in alinement, the righthand bearing resting and turning on the right-hand strut and the left-hand one resting and turning on the left-hand strut. As

thus made the sash-balance pulley is much more durable than when made from cast metal, from the fact that it is less liable to be broken and is much lighter. Being made with the convexity G surrounding the axlebearing, the latter will have greater length within the pulley than if the length of the .bearingwas reduced by the inward curvature of each of the disks at the axle-bearing, as shown in older forms of sheet-metal pulleys. When made with the lip L at each side of the sash-cord groove, it does away with the objection to sheet-metal pulleys by preventing the edges of groove from cutting or chafing the cord.

The two '2 sleeved thereon and a pulley having its central part hollow, laterally expanded and perforated so as to present two annular bearings, one of which turns on each of the said struts, the latter being in contact with each other at their inner ends and with the walls of the balance-case at their flanged outer ends, substantially as set forth.

2. A sash-balance case and a fixed pulleyshaft extending across the same, in combination with two tubular non-rotary struts sleeved thereon and extending end to end from one case-wall to the other and a pulley consisting of two plates provided with interlocking devices and spread apart at the center Where they are provided with annular bearings, turning respectively on the said struts substantially as set forth.

Signed at the city of Troy, New York, this 31st day of July, 1899, and in the presence of the two witnesses whose names are hereto written.

WARREN T. KELLOGG. Witnesses:

W. E. I-IAGAN, CHARLES S. BRINTNALL.

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