US1569347A - Sash balance - Google Patents

Description

Jan. 1; 1926. 1,569,347

A. E. ANAKIN SASH BALANCE Filed April 28, 1925 IN V EJV' TOR.

ATTORNEY Patented Jan. 12, 1926.

UNITED sTAres PATENT QFFKJE."

sAsn BALANCE;

Application filed April as, 1925. Serial No. 26,491.

To all whom it may concern.

Be it known that I, ARTHUR E. ANAKIN, citizen of the United States, residing at 950 American Avenue, Long Beach, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in a Sash Balance, of which the following is a specification.

This invention relates to sash balances and has special reference to a spring sash balance.

()ne important object of the invention is to improve the general construction of devices of this charatcer.

A second important object of the invention is to provide an improved form of spring sash balance wherein a simple and compact form of compression spring may be used in association with certain other arrangements.

A third important object of the invention is to provide a form of sash balance employing a compression spring which is of such compact nature that it is economical in construction and can be readily applied to a window without material changes in either the sash or frame.

WVith the above and other objects in view as will be hereinafter apparent, the invention consists in general of certain novel de tails of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed.

In the accompanying drawings like characters of reference indicate like parts in the several views, and:

Figure 1 is a face View partly in section of a portion of a window and frame showing the balance in position.

Figure 2 is an enlarged view showing. the parts of the balance in expanded position.

Figure 3 is a view similar to Figure 2 showing the parts of the balance incompressed position.

Figure 1 is a greatly enlarged vertical section-through the balance.

In the form of the invention here illustrated there is provided a channel shaped casing resembling a box open at one side and this casing has side walls'lO and aback wall 11. Extending between the side walls, at the lower end of the casing is a pin 12. At 13 is a lower tubular member having its 3 upper end open and its lower end provided Wlth a desi e vhe' n is equat a P of cars 15 through which the pin 12 passes. Supported between these cars on the pin 12 is a series of independently revoluble sheaves 16. At 17 is an upper tubular member which has its lower end telescopically engaged with the open end of the member 13 and is provided, at its upper end, with a closure 18 supporting a pair of spaced cars 19. In the ears 19 is mounted a pin 20 on which are arranged the independently revoluble sheaves 21.

Led around the sheaves 16 and 21 is a flexible strand in the form of a sash cord or wire and one end of this strand is fixed to the casing as at 22. The remaining end of this strand is free for attachment to the side of a window frame 23 as at 21, the casing being fitted into a suitable mortise 25 formed in the side edge of the sash 26.

Under these conditions, the spring 27, which is interposed between the closed ends of the tubular members, is compressed upon the sash'being moved down and expands as the sash moves upwardly. Thus, by selecting a suitable size of spring, the sash can be perfectly balanced.

There has thus been provided a simple and efficient device of the kind described and for the purpose specified.

It is obvious that minor changes may be made in the form and construction of the invention without departing from the material spirit thereof. It is not, therefore,

desired to confine the'invention to the exact form herein shown and described, but it is desired to include all such as properly come within the scope claimed.

Having thus described the invention, what is claimed as new, is:

1. In a sash balance, a pair of telescopically arranged tubular members, sheave supports each carried by the outer end of a respective member, sets of sheaves each supported on a respective sheave support, a flexible strand led around said sheaves outside of said members and having one end fixed and the other end free for attachment to part of a window, and a compression spring housed in said tubular members and urging the same apart.

2. In a sash balance, a channel shaped casing adapted to fit in. the side of a window sash, a pin extending from side to side of said casing adjacent one end thereof, a tubular member having one end closed and provided With a pair of cars mounted on said pin, a series of independently revoluble sheaves mounted on said pin between said ears, a second tubular member having one end telescopically engaged on the free end of the first tubular member and having its other end closed and provided With a pair of spaced ears, said member being normally housed in said casing, a pin carried by the last mentioned ears, a

series of independently revoluble sheaves 10 mounted on the second pin, and a spring in said, tubular members urging the same apart, a flexible strand led around said sheaves and having one end fixed and its other end free for attachment to a Window 15 ARTHUR E. ANAKIN.

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