US593768A - Sash-fastener - Google Patents

Description

(No Model.)

2 Sheets-:Sheet 1.

G. H. FOR'SYTH.

SASH FASTENER. I No. 593,768. r I Patented Nov. 16,1897.

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2 t e e h S W e e h s 2 mm Ym SE RM 0 P w H G (No Model.)

Patented Nov. 16,1897.

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GEORGEII. FORSYTH, OF CHICAGO, ILLINOIS.

SASH-FASTENER;

srnornronrxon forming part of Letters Patent no. 593,768,:1ated November16, 1897. Application filed February 2, 1897 Serial No. 621,302. (No model.)

To all whom it may'concern:

Be it known that I, GEORGE H. FORSYTH, of Chicago, Illinois, have invented certain new and useful Improvements in Sash-Locks, of which the following is a specification.

This invention relates to a look for a counterbalanced sliding sash; and it consists in I the combination, with abalanced sash, of a look so constructed and applied that the sash v to be moved.

' In the accompanying drawings, Figure 1 is a broken elevation showing a portion of a window-frame, a sash sliding therein, and a spring-roller adapted to raise the sash when the locking mechanism is released. Fig. 2 is an edge view of the. sliding sash, showing a rod-groove, a recess to receive the end of the locking-dog, and also, in dotted lines, a recess to receive the lock-case. Fig.3 is a face view of the frame, showing the sash-groove and the locking-rod in place. Fig. 3 is a detail view showing the means of securing the lower end of the locking-rod. Fig. 4 shows my invention as applied in a sash-lock adapted to prevent the sash from being raised. Fig. 5 is an edge View of the lock-case and locking-dog, showing a portion of the lower sash-rail in section. Figs. Gand 7 are respectively plan and edge views of the lock-case, and Fig. 8 a plan view of the lock-face. Figs. 9 and'10 are respectively plan and edge views of the locking-dog. Figs. 11, 12, and 13 are respec tively .a front elevation, a top or'edge view, and an end elevation of an operating-lever, which is'pivoted in the lock-case and used to operate the locking-dog.

I employ a stationary locking-rod 16, which is secured to the sideof the window-frame 17 and extends out from the face thereof. The sash 18.has, in the preferred construction, one of its edges grooved, as shown at 19, to receive the rod. At some convenient place upon the sash, and preferably at one of the of a locking-dog 25.

lower corners, I secure my locking mechan ism, which consists in the preferred form of a casing 20, preferably fitted into a recess in the sash and covered by a face-plate 21. The lock-case and the face-plate have registering apertures 22 23, which receive the pintles 24 Said locking-dog has an aperture 26 slightly larger than the rod 16,and the dog is so pivoted that it will, when turned into an oblique position,bite upon the rod and thereby lock the sash against movement. As shown in Fig. 4, a spring 27 is arranged so as to normallydepress the outer end of the locking-dog and thereby serve to prevent the raising of the sash except by turning the dog upon its pivot, while permitting the sash to be lowered by merely pressing down upon it and without manipulating the lockin g mechanism. In order to move this dog upon its pivot, I

preferably employ an operating-lever, which may be of the construction shown in Figs. 11, 12, and 13. Thislever, which is marked 28, has an offstanding thumb-piece 29, a laterally-ofiset cam-lug 30, and an aperture 31, which fits over the stud 32 on the lock-case 20. Said stud hasa threaded aperture, and one of the binding-screws 33, which secure the face-plate to the lock-case, engages with the threads of this apertured stud. The offset portion of the body of lever 28 works within an irregularly-formed aperture 34 in the face-plate 21, and the aperture is of such shape that the. lever may be entered therethrough, and then,'by turning the body of the lever into the proper position, said body will entirely cover the aperture, as shown in Fig. 4. The operating-lever has its pivot upon the stud 32 and the lug 30, which is cam-shaped upon its edge, rests beneath the dog, as seen in Fig. 4, so that the lifting of the free end of the lever will lift the dog, releasing it from biting contact with the rod and permitting the sash to be lifted. The operating-lever has only a slight movement, owing to the fact that its cam engages the dogclose to the pivot'of the latter, and the application of force to release the dog is in the direction in which the sash is to be moved. In other words, the operating-lever is lifted in order to permit the sash to be raised, and therefore my construction affords a lock ICO which is operated by movements which are not unusual or unnatural. I also prefer to provide on the lock-face an offstanding lug or dummy 38, which will form a bearing for the thumb in manipulating the sash. I also employ, in connection with the lock, means whereby the sash is automatically raised. Thus, as shown in Fig. 1, I employ a springactuated roller 39, which is connected by a flexible strip 40 with the sash. The spring in this instance will have suflieient strength to lift the sash unless the latter be restrained by the lock, and in order to raise the sash all that is necessary is to lift the dog bymeans of the operating-lever and the spring will carry the sash up. Instead of the spring-roller cords and weights might be employed. I pre fer the arrangement of operating-lever shown in Fig. 4, because the lug 30 acts upon the principle of a cam in the raising of the dog and engages with the dog near its pivot. I also prefer to make the apertures 22 23, which receive the pintles 24, of elongated form, so as to adapt the lockto be applied to rods projecting varying distances from the face of the sash-frame. These elongated apertures are also inclined in the direction of inclination of the dog itself, and the movement of the dog toward the position of release is limited by the stop 41. A stop 41 is also provided on the face-plate to limit the throw of the lever 28 and thereby prevent the bending or breaking of the lever by the transfer of the strain thereon to the stop.

My invention is particularly intended for use in car-windows, and these windows having but a short vertical movement cannot be raised so as to clear the rod 16 for removing them. This necessitates some construction whereby the rod itself may be removed readily in order to permit the window to be taken out. I have secured the rod in a novel manner, which is clearly illustrated inFigs. 1, 2, 3, and 3 of the drawings. The upper end of the rod is ofiset, and the offset portion thereof is secured to the end of a plate 43 and the body of the rod standing in line with the groove of the sash-frame and the end of the plate projecting over said groove. Obviously this plate, in order to be free of the sash, must be let into the frame so that the outer face of the plate shall stand flush with the bottom of the groove, as seen in Fig. 1, and this recess must extend out to the face of the frame, as shown in Fig. 3. The plate is secured to the frame by means of the screws 44 and the removable sash-strip 45 is secured to the frame oversaid plate. The ofiset end of the rod is preferably threaded where it enters the plate 44, and thereby provision is made for adjusting the rod to and from the face of the groove. The lower end of the rod is also threaded into the aperture of a stud 42, the latter being threaded into a plate 46 of similar construction and arrangement to the plate 43. The lower end of the rod terminates above the bottom sill of the frame,

and when it is desired to disconnect the dog from the rod for repair or other purposes the window is run up and the plate 46 is unscrewed from the window-frame. The rod can then be sufiiciently flexed to permit the plate 46 and the stud 42 to be disconnected from the rod, and then the window being lowered the dog may be slipped off the lower end of the rod without removing the window from the frame.

From the foregoing specification it will be seen that the gist and essence of my invention resides in the combination, with a balanced sash, of a lock so constructed and applied that the sash will be automatically raised when the lock is released, automatically locked in any position to which it may be raised, and may be lowered without manually releasing the look.

I am aware that counterbalanced sash have been used and that manually-operated locks have been applied to counterbalanced sash, also that automatic locks have been applied to unbalanced sash; but so far as I am aware I am the first to combine with a balanced sash a lock which normally locks the sash against upward movement and permits it to be lowered without manual operation of the lock. Further, it will be seen that my invention provides a means whereby the window is always looked against opening from the outside, while it may be lowered either from the inside or the outside without manipulating the lock itself. My construction is entirely different in its principle of operation from those devices wherein a balanced sash is provided with a manually-operated lock, because in such case the balancing of the sash performs no other function than to lessen the physical effort required to raise the sash, while the lock must be manipulated when the sash is to be lowered. By my arrangement the balancing of the sash introduces the new function of causing the automatic reengagement of the lock in order to prevent farther upward movement while it sustains the weight of the sash and permits it to be lowered by the application of only sufiicient force to overbalance the weight or spring, but without manipulation of the look.

I claim-- 1. In a sash-lock the combination of a rod and a pivoted dog for engaging the rod when the sash is raised and means for preventing such engagement of the dog and red when the sash is lowered, substantially as set forth.

2. In a sash-lock the combination with a lock-case and its face-plate, said case and said plate having registering apertures therein, a pivoted locking-dog having pintles entering said apertures and forming pivots for the dog, and an operating-lever pivoted within the lock-case and having an offset lug adapted to bear upon the edge of the dog, the body of said lever being extended through the faceplate, substantially as described.

3. In a sash-lock the combination with a pivot to release the rod, substantially as described.

GEORGE E. FORSYTH.

Witnesses:

FREDERICK (J. GOODWIN, A. J. PRATT.

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