US395165A

US395165A - Sash-balance

Info

Publication number: US395165A
Authority: US
Publication date: 1888-12-25
Anticipated expiration: 1905-12-25

Description

(No Model.) 7

H. W. MORGAN.

SASH BALANCE.

No 395,165. I Patented Dec. 25, 1888.

- PEYERS, "lam-Lithographer. Waahmgion, o1:

NITED STATES PATENT OFFICE.

HARRY \V. MORGAN, OF ROCHESTER, NEW YORK.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 395,165, dated December 25, 1888.

Application filed October 2'7, 1888. fierial No. 239,310. (No model.)

To aZZ whom, it may concern:

Be it known that I, HARRY \V. MORGAN, of the city of Rochester, in the county of Monroe and State of New York, have invented new and useful Improvements in Sash-Balances, of which the following is a specification.

This invention relates to that class of sashbalances which consist of a spring pulley or drum upon which the sash cord or cable is wound, an d which are provided with a tension device for retarding the movement of the sash-pulley, so as to render the balance less sensitive and enable the same to be used for supporting sashes of greater or less weight without requiring a correspondingchange in the tension of the counterbalancing-spring.

The object of my invention is to provide the balance with a simple and efficient tension device of this character.

My invention consists of the improvements which will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a sectional side elevation of my improved sashbalance applied to a window-sash. Fig. 2 is a rear elevation thereof. Fig. 3 is a crosssection in line a, 1, with the tensionroller in elevation. Fig. 4 is a fragmentary side elevation of the pulley and easing, showing the inclined ways onwhich the axle of the tension-roller rests.

Like letters of reference refer to like parts in the several figures.

A represents the face-plate of the casing of the sash-balance, and A A are the parallel wings or side plates thereof.

B is the pulley or drum upon which the sash-cord b is wound, and c is. the stationary axle upon which the pulley B is loosely mounted. The pulley H is provided with the usual marginal. flanges, 11, for retaining the sash-cord upon the pulley. The ends of the axle c are angular or flat-sided, and are arranged in horizontal slots 0, formed in the side plates, A A, in a well-known manner.

D is the coiled counterbalancing-spring arranged within the pulley B and secured at one end to the inner side of the pulley and at its other end to the stationary axle c in the customary manner. The sash-cord b is attached at one end to the periphery of the pulley B and at itsopposite end to the sash.

F represents a tension-roller bearing against the faces of the pulley-flanges b at the lower rear portion of the pulley B, whereby the rotation of the pulley is retarded. Thetensionroller F is mounted upon an axle, f, which rests loosely on inclined ways formed at the lower rear portions of the side plates, A.

h is a guide-roller journaled in the front portion of the casing, in front of the tensionroller F. The sash-cord 1) passes from the lower side of the pulley B around the rear side of the tension-roller F, and then forwardly over the guide-roller h, the cord being wound upon the pulley in a direction opposite to that in which it passes around the tension-roller F, so that the pulley and tension-roller will be turned in opposite directions.

The inclined ways g trend toward the center of the pulley B, as shown in Figs. 1 and 4, so that the strain 011 the sash-cord will draw the tension-roller against the faces of the pulley flanges b. The tension-roller is in this manner pressed against the faces of the pulley with greater or. less force according to the weight of the sash, thereby retarding the movement of the pulley and preventing too easy relaxation of the tension spring D. Should the sash be somewhat light for the tension of the spring, the pressure of the tension-roller against the pulley B will be sufficient to balance the sash and prevent the spring from violently raising the sash when the latter is released; and in case the weight of the window should be somewhat greater than the tension of the spring, the tensionroller will be more firmly pressed against the pulley and thereby increase the resistance of the sash-balance sufficiently to properly balance the sash. The resistance of the sashbalance by the aid of the tension-roller is in this manner automatically regulated and accommodated to any slight variation in the weight of the suspended sash without requiring a change in the tension of the counterbalancing-spring, thus enabling the same sash-balance to be used for holding sashes of different weight. lVhen the sash is raised or lowered, the tension-r0ller revolves freely in contact with the sash-pulley and permits the sash to be moved with little effort.

The tension-roller is mounted loosely upon its axle, so that the roller may turn freely in ways is avoided.

contact With the peripheral faces of the pulley B and so that the aXleof the roller may rotate independently of the pulley on its ways toward and from the pulley. By this construction excessive friction of the axle on its The end portions of this axle are preferably reduced in diameter to form shoulders, which bear against the inner sides of the side plates, A, of the casing, as shown in Fig. 3, and whereby the axle is held against lateral displacement.

I claim as my invention- 1. The combination, with the sash-pulley and its spring, of a tension-roller bearing against the face of the sash-pulley, substantially as set forth.

2. The combination, with the pulley-casing having ways, of the sash-pulley mounted in said casing and provided with a counterbalancing-spring, and a tension-roller bearing against the face of said pulley resting on said ways and capable of moving toward and from the face of the pulley, substantially as set forth.

3. The combination, with the pulley-casing having ways, of the sash-pulley mounted in said casing and provided with a counterbalanoin g-sprin g, a tension-roller bearing against the face of said pulley, resting on said ways and capable of moving toward and from the face of the pulley, a guide-roller arranged at the front portion of said casing, and a sash cord or cable running around-said tensionroller and over said guide-roller, substantially as set forth.

4. The combination, with the pulley and its counterbalancing-spring, of the pulley-casing provided with ways trending toward the cen-' ter of the pulley, a tension-roller bearing against the face of the pulley, and an axle upon which the tension-roller is mounted, which is capable of rotat-ive movement independent of the tension-roller and which rests loosely on the ways of the pulley-casing, substantially as set forth.

Vitness my hand this 18th day of October, 1888.

HARRY XV. MORGAN.

\Vitnesses:

LEWIS F. LUX, O. O. DAVY.