US970507A - Sash-lock. - Google Patents

Description

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SASH LOOK.

' IIIIIIIIIIIIIIIII EO. 6, 1909.

970,507. Patented sepe.2o,191o.

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THEODORE N. JONES, 0E BOULDER, COLORADO, ASSIGNOR TO THE POWERS BURGLAR PROOF SASH LOCK COMPANY, OF HASTINGS, NEBRASKA.

SASH-LOCK.

Specification of Letters Patent.

Patented Sept. 20, 1910.

Application filed December 6, 1909. Serial No. 531,640.

To all whom it may concern:

Be it known that I, lnnonoma N. JONES, a citizen of the United States, residing at Boulder, county of Boulder, and State oiy Colorado, have invented certain new and useful Improvements in Sash-Locks; and I do declare the following to be a full, clear, and exact description ot' the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specilication.

My invention relates to improvements in sash locks, my object being to produce a device adapted to lock each sash of the window, either in the closed position or with the sash open at any desired degree.

In my improved construction I employ two members, one ot which is connected to turn with an operating stem or key, while the other is loose on the key but slotted to receive a pin carried by the fast member, whereby when the key has turned the fast member a limited distance, the pin of the fast member reaches the extremity o't the slot in the loose member and actuates the latter in the direction of the keys rotation.

The two members of the lock are each composed of a segment having a curved, preferably corrugated surface, adapted to engage the outer edge ot' the sash. The two members are of ditferent size, that is to say, the radius of one member is greater than that ot the other member. By virtue of this construction the device is adapted for use with sashes that tit either closely or loosely within their frames. 1With a close fitting sash the smaller member or segment may be utilized, while the larger segment is held out of commission, so to speak. If, however, the sash becomes loose, leaving a greater space between it and the lock, the larger segment will be brought into requisition. Hence, in my improved construction the device not only performs the sash-locking function but it also serves to hold the sash securely in place, whereby rattling is prevented.

Having briefly outlined my improved construction, I will proceed to describe the same in detail, reference being made to the accompanyingdrawing in which is illustrated an embodiment thereof.

In this drawing: Figure 1 is a front View ot a window equipped with my improved sash lock, two of the devices being shown in place, one for each sash. Fig. 2 is a section taken on the line 2-2, Fig. 1, the parts being shown on a larger scale, the sash lock, however, being shown in end elevation. Fig. 3 is a section taken on the line 3-3, Fig. 2, looking in the direction of the arrow. Fig. 4t lis a View similar to Fig. 3 but showing the members in different. relative positions. Fig. 5 is a similar' View showing the locking members in still another position. Figs. (3 and 7 are detail views ot' the two members or segments of the sash lock.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a casing composed of side plates 6 and a tace plate 7 cut away at 8 to allow the sash lock members 9 and l() to protrude for locking purposes. This casing is provided with end extensions 12 having openings to receive fastening screws 13. Journaled in the casing is a hollow spindle 14, whose inner surface is ot' polygonal shape to receive an operating key 15, in which the key lits and whereby it is adapted to rotate the said hollow spindle. This spindle is also polygonal exteriorly and the opening in the member 10 of the sash lock is of counterpart shape and fitted thereon so that the said member moves with the spindle and opera'ting key. The member 9 has a smooth circular opening 16 surrounding the hollow spindle and is thus allowed to turn independently of the spindle. The spindle is normally held in a predetermined position by a spring 17 which is coiled around the spindle, one extremity engaging a stop 18 punched out of 'the side ot the casing, while the other extremity engages a lip 19 formed on the member 10. The member 10 is provided with a small lip or projection 20 which protrudes through a slot 21 formed in the member 9. The face of each of these sash locking members is preferably corrugated, as shown a't 22. The face of the member 10 does not .lie in a true curve struck from the center of motion of the member, but its radius increases from the point 23 to the point 24. This is also ltrue ot' the member 9. The shortest radius, however, of the member 9 is equal to the greatest radius of the member 10. Hence, by virtue of my improved construction, provision is made for considerable variation in the lost motion or space between the window sashes and the frames or the bottoms of the sash grooves.

From the foregoing description the use and operation of my improved device will be readily understood. In applying the device i't is attached to the window frame so that the locking members are permitted to protrude through the opening 8 of t-he casing into the sash groove. By referring to Fig. 5 it may be assumed that 'the device is on the left hand side of the frame adjacent the upper sash. Assuming now that the sash is closed it will be evident that it cannot be moved downwardly or opened at the top since the locking member 9 will prevent this movement. IVhen, however, it is desired to open the window a't the top, the stem 15 is employed to turn the sash locking members into such position that the upper sash may be lowered or opened at the top. As soon as the force applied 'to the key or stem has been released, the spring will act to throw the member 10 outwardly against the sash rail. The sash may then be raised without the use of the key or s'tem but it can only be lowered by turning the hollow spindle suficiently to disengage the locking member from the sash. In operating the device, if we assume that the par'ts are in the position shown in Fig. 5, and the spindle or key is turned in the direction of the arrow in Fig. 5, it may be assumed that the member 9 will remain stationary until the member 10 has been t-urned sutliciently to cause the lip 2O of the member 10 to engage the extremity 25 of the slot 21, in which event the member 10 picks up, so to speak, 'the member 9 and carries it into the position shown in Fig. 4. It may now be assumed that the sash is released and may be moved downwardly at will until the sash has been opened to the desired distance; and as soon as the force applied to the operating key is released, the sash locking members will act to engage the sash and prevent farther downward movement. If there is but lit'tle play or lost motion between the sash member and the frame, the member 10 will act to perform the sash locking function; while if there is considerable play or los't motion the member 9, which has the greater radius, will be carried into engagement with the sash and perform the desired function, the member 9 being carried into the locking relation, by virtue ofthe fact that the spring 17 is connected with the member 10, as heretofore described.

Attention is called to the fact that the cam construction composed of the two members 9 and 10 is an important feature since these members are adapted to overlap or fold when at their inward limit of movement, thus enabling them to occupy a much smaller space than would be possible, were a device of the same cam-surface area and formed in a single piece, employed.

The space for the sash-lock recess in the window frame, between the sash groove and the runway for the weight in boX frames, is quite limited and applicants construction which allows the two members to fold or overlap, makes it practicable to employ a recess or chamber of approximately half the depth that would be required for a single cam having the same range of adjustability.

Having thus described my invention, what I claim is:

1. A sash lock comprising a spindle and two members mounted thereon, one member being fast and the other loose on the spindle, one of the members being' slotted to receive a projection with which the other member is provided, the two members being of different radius, substantially as described.

2. A sash lock comprising a casing, a spring-held spindle and two sash locking segmental members of different radius, one member being fast on the spindle while the other member is loose thereon, a spring for normally holding the spindle in a predetermined position and means for connecting the two segmental members, whereby one member is allowed to move a considerable distance independently of the other member, for the purpose set forth. v

3. A sash lock composed of a spindle, two sash locking members of 'fdifferent radius mounted on the spindle one being fast and the other loose thereon and an interlocking connection between the two members whereby they are adapted to overlap during thc perforn'iance of their function, for the purpose set forth.

4f. A sash lock composed of a spring tensioned spindle, and two sash locking members of different radius mounted on the spindle one being fast and the other loose thereon, and an interlocking connection between the two members whereby they are adapted to overlap, the fast member picking up and actuating the loose member during the operation of the device substantially as de-V scribed.

In testimony whereof I aHiX my signature in presence of two witnesses.

THEODORE N. JONES-` Witnesses:

A. J. OBRIEN, Jnssm F. IJIOBART.

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