US1508863A - Sash balance - Google Patents

Description

Sept; 16, 1924. r 1,508,863

G. c. WEBSTER 'ISASH BALANCE I Filed Qqt. 21 192 2 v lflllliiff I v w ser Patented Sept. 16,

GEORGE C. WEBSTER, OF LOS ANGELES, GALTFQRNIA. v

SASH BALANCE.

Application filed October 21, 1922. Serial No; 595,948.

To all whom it may concern:

Be it known that I, GEORGE C. WEBSTER, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Sash Balances, of which the following is a specification.

-This invention relates to sash balancing means, and has-for its object to improve the type of sash balance that is disclosed in a parent issued November 27, 1917, No. 1,248,- 22

More particularly it is an object of the present invention to rovide a simplified and easily acting t pc sash supporting means, and particular y it is an object to provide a sash balancing means consisting of few and substantial parts including a spring adapted to be wound and unwound by the action of the sash. L

Other objects and advantages will be made manifest in the following specification of an embodiment of the invention illus trated in the accompanying drawings, wherein- I Figure 1 is aview showing in elevation and partial section fragments of upper and lower sashes combined with the improved su porting means.

'g. 2 1s a longitudinal section through one of the sash supporting means'detached from the window.

,Fig. 3 is a plan of the supporting device.

The invention is shown as combined with an upper vertically sliding sash and a lower similarly sliding sash 11, each of which has its side stiles 12 lon 'tudinally channeled for a suitable length; t e top and bottom ends of the rails 13 closing the ends of the channels in the stiles. The present invention consists broadly of a tube 15 of suitable diameter and length and being rovided with a helical groove 16 of a suitab e pitch; the groove preferably being of arcuate cross section.

An inexpensive form of the device is shown wherein the tube 15 has the helical groove rolled or inwardly depressed therein.

The up er and of the tube, or as it may be nailed t is roller 15, is provided with a cap 3;, and the lower end is provided with a similar cap 18 each of cup form; the lower being shown as provided with a struck down lug 19 to receive and hold the contiguous end of an aggropriately strong spring 20 arranged wit the roller 15 and. surroller 15 about its own axis.

- upper bracket 23 having a downwardly extending arm 24 which may be hailed as at 25 to the bottom of the. channel in the stile 12, and the bracket has an upwardly bent outer end 26 which is secured as by a nail 27 to the end of the top rail 13 of'a sash. The bracket 23 is provided with an elongated aperture 28 to receive the noncircular or flat end 21 of the spindle 21 and therefore hold this against rotation.

A somewhat similar lower bracket 30 is secured to the bottom stile of the window sash 11 and has a socket portion 31 to rebrackets therefore support the spindle 21 in upright osition and permit the rotation of the r0 ler or tube 15 about the spindle.

Countersunk in the adjacent vertical element 33 of the window frame is a device consisting of a collar 34 rotatably fitting about the, roller 15, the collar having the transversely extending shell 35 which 1s countersunk in the window frame 33 as clearly shown in Fig. 1. The shell or lateral extension 35 is provided with a ball race 36 and in it is arranged an annular series of balls 37 which support centrally a large roller engaging ball 38,,this having a diameter complementary to the arcuate helical groove 16 in the roller 15. It will be seen that by this construction theacontact rollerv 38 will freely roll on its annular series of ball bearings 37 during vertical movement of the roller 15 with the respective window sash.

"ceive the lower end of the spindle 21. These In action, when the sash is raised or lowered, the nonshifting roller engaging ball 38 is efiective to cause the rotation of the This rotation of the roller on the downward movement'of the sash causes the spring 20 to be wound to increase its tension and therefore form an effective counterbalance and support to hold the window sash in any adjusted position 1n its guides. s

From the above it will be seen that the present improvement enables the easy action of the sash due to the antifriction support of the roller engaging ball 38. It will also be seen that I have provided a window supporting means or counterbalance of extreme simplicity and few and substantial parts.

The brackets are shown as provided with slight projecting beads 30 which are pro-.

vided for the purpose of having a running contact with the window frames and taking all of the wear, and for providing for operation of the sash with minimum friction.

Further embodiments, modifications and changes may be resorted to within the spirit of the invention as here claimed.

What is claimed is:

1. A: yielding sash counterbalance comprising upper and lower brackets, a roller adapted to be countersunk in a stile of a window sash, a spindle extending through; the roller and adapted to be mounted and held against rotation in said brackets, a spring surrounding said spindle and secured thereto and inclosed in said roller, and being attach at one end thereto, and a ball and race device attachable to a contiguous member of the window. frame for supporting a ball engaging and causin the roller to rotate during movement 0 the sash and thereby vary the reaction of thespring.

2. A yieldingsash counterbalance comprising upper. and lower brackets, a roller adapted to be countersunk in a stile of a window sash, a spindle extending through the roller and adapted to be mounted and held against rotatlon in said brackets, a spring surrounding said spindle and secured t ereto and inclosed in said roller, and being attached at one end thereto, and means attachable to acontiguous member of the window frame for engaging and causing the roller to rotate during movement of the sash mosses and thereby vary the reaction of the spring, said means including a ball bearing adapted to be held in said position by the window frame, and aroller engaging central ball supported on the ball bearing.

3. In a spring controlled, roller sash counterbalancing means, a roller having a peripheral, helical groove, a ball engaging said groove, which is free to turn upon a nest of balls within a ball race.

4:. In a spring controlled, roller sash counterbalancing means, a tubular roller having a peripheral, helical groove depressedin its wall, end caps applied to the ends of the roller, a spindle extending axiall of the roller and journaled in the caps an extending beyond the same, and a spring surroundin the spindle and attached at one of its ends thereto and attached at its opposite end to one of the caps so that upon relative rotation of the roller and the spindle reaction is produced from the spring.

5. In a spring sash balance, a means for mounting comprising brackets fastened on the inner sides of the top and bottom rails of the window, the rails forming ends for a channel within the window stile in which the sash balance is held, said brackets having recesses receiving ends of the sash balance. V

6. In a spring sash balance, a means for mounting comprising brackets fastened on the inner sides of the top and bottom rails of the window, the rails forming ends for a channel within the window stile in which the sash balance is held, said brackets having bead portions in running contact with the window frame.

In testimony whereof I have signed my name to this specification.

Greece 0. wnns'rna.

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