US2475392A

US2475392A - Safety lock

Info

Publication number: US2475392A
Application number: US731978A
Authority: US
Inventors: Juszczak Constantine
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-03-03
Filing date: 1947-03-03
Publication date: 1949-07-05
Anticipated expiration: 1966-07-05

Description

atentedl July 5, 1949 STATES PATENT OFFICE 3 Claims.

This invention relates to improvements in safety locks for windows.

An object of the invention is to provide an improved safety lock. for windows which will be positive in action when securing the window against movement, and will provide a resilient tensioning means between the window sash and the frame whereby he sash may be raised to any desired height and supported at the selected adjustment.

A further object of the invention is to provide an improved safety loci: for window sashes which will include a housing mounted transversely upon the upper sash rail and will include a horizontally slidable locking pin which will be spring projected to engage an undulating track secured to the side of the window frame for holding the window in the desired adjusted open position, and a pivoted locking element adapted to be moved into locking position behind said pin when it is desired to secure the window against vertical movement in either direction.

A still further object of the invention is to provide an improved safety lock for windows which will be highly efficient in operation, and relatively inexpensive to manufacture and produce.

Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application,

Figure 1 is a front elevation of the improved safety loelc shown applied to a window sash and with the undulating locking strip shown secured to the adj acent base of the window frame;

Figure 2 is an edge view of the undulating locking strip;

Figure 3 is a front elevation of a portion of the undulating locking strip;

Figure 4 is a longitudinal sectional view taken through the improved safety lock showing the same in locked position, and showing the same in dotted lines with the locking catch in released position;

Figure 5 is a sectional view taken on the line 5-5 of Figure 4;

Figure 6 is a sectional view taken on the line 65 of Figure 4, and

Figure 7 is a sectional view taken on the line l-l of Figure 4.

Like characters of reference are used throughout the following specification and the accompanying drawings to designate corresponding parts.

In carrying out the invention, there is illustrated a window sash generally denoted by the reference numeral I, and a window frame 2 therefor.

A metal undulating locking strip 3 is securely fastened to the inside edge of the window frame2 by means of the short screws 4. in position to be engaged by the improved safety lock. hereinafter 1ore fully described.

The safety lock is adapted to be secured upon the upper surface, of the window sash I, and comprises an elongated substantially rectangular shaped lock housing 5 formed by an upper plate 6 and a lower plate I, together with the. oppositely disposed

side plates

8 and 9;

The oppositely disposed inwardly directed apertured ears Ill and II are formed integrally upon the opposite side plates 8- and 9 respectively, said apertures being threaded to. receive the screws I2 which extend through threaded apertures formed through the upper plateB andthrough the lower plate 7, thereby, supporting the upper and lower plate and the cooperating side plates in fixed position to provide ahollow elongated; rectangular shaped housing.

A pair of spacedinverted U-shaped bearing ribs I3 are welded to the upper plate 6, while a pair of spaced U-shaped bearing ribs. I4 are welded to the upper surface of the lower plate 1 directly below said ribs I3, forming guide channels for the elongated locking bolt I 5, which is rectangular in cross section, and is reduced atits forward end to provide the finger l6.

Front and rear closure members I! and I8 respectively are secured in the front and rear ends of the lock housing 5, and the front closure member I! is centrally apertured to permit the forwardly extending cylindrical locking finger [6. to pass and slide therethrough; to engage the undulating locking, strip 3 secured to the adjacent side edge of the window frame 2. A stop lug I9 is formed integrally on the lower surface of the locking bolt I5, and is providedsothat it will engage the adjacent U-shaped bearing rib Has the locking bolt is forced. inwardly within the lock housing 5 to limit the inward movement thereof.

A. stud 20 isfixed to the inner surface of the rear closure member I8 and supports one end of a substantially heavy coil spring 2|, whose forward end is received within a bore 22 formed in the rear end of the said locking bolt I5, serving to normally and resiliently urge the said locking bolt I5 to its outermost position and into engagement with the metal undulating strip 3.

A bearing roller 23 is provided with reduced opposite ends 24' and 25, and is mounted transversel between the

opposite side plates

8 and 9 of the lock housing 5, as clearly illustrated in Figure 5 of the drawings. A locking plate or member 26 is secured to the bearing roller 23 and is movable therewith, and supports the upwardly extending operating finger 21 which extends upwardly from the roller out through the longitudinal slot 28 formed through the rear end of the upper plate 6, whereby the locking plate or member 26 will be disposed behind the locking ear 29 formed integrally on the upper end of the locking bolt [5 and at the rear end thereof, thereby providing an absolute and positive lock for preventing the inward movement of the locking bolt for holding the same in positive contact with the undulating strip 3 secured to the inside surface of the window frame 2, thus preventing the window sash from being either raised or lowered.

When the operating finger 2'! is moved rearwardly, the lockin plate or member 26 will be disengaged from behind the locking ear 29 on the locking bolt IE to release the bolt so that it will be free to slide backwardly and forwardly within the bearing ribs in said lock housing 5, for permitting the window sash to be raised or lowered if desired.

A pair of spaced downwardly extending lugs 38 are suitably secured to the undersurface of the upper plate 6 at the rear end thereof, and supports the leaf spring 31 therebetween, said spring being bowed downwardly to engage and rest on the upper surface of the bearing roller 23 to tension the operation of the same.

The lower plate I of the lock housing 5 will extend downwardly in the front end of said housing and at right angles thereto, being formed integrally therewith, and being provided with the apertures 33, through which securing screws (not shown) may be placed for locking the lock housing 5 in fixed position upon the top edge of the upper rail of the window sash I.

From th foregoing description, it will be seen that the operation of the improved safety lock for sashes will be as follows: The operating finger 21 will be moved to the left, as viewed in Figure 6 of the drawings to release the locking bolt l5 so that the window sash I may be raised or lowered as desired, and when the window sash is to be locked in any position either part way up, or fully down, the operating finger 2'! will be moved to a vertical position as shown in full lines in Figure 4, thereby moving the locking plate or member 26 behind the locking ear 29 formed on the locking bolt I5 to secure the same against movement and in locked position firmly and securely against the metal undulating strip 3 secured to the sash frame 2.

While the preferred embodiment of the instant invention has been illustrated and described, it will be understood that it is not intended to limit the scope of the invention thereto, as many minor changes in detail of construction may be resorted to without departure from the spirit of the invention.

Having thus described my invention what I 4 claim as new and desire to secure by Letters Patent of the United States is:

1. A sash fastener comprising an elongated casing adapted to be secured upon a window sash, oppositely disposed U-shaped bearing ribs on the inner surface of the top and bottom of the casing, a locking bolt slidably mounted in said ribs, a reduced locking finger on on end of the bolt, a central bore in the opposite end of the bolt, resilient means seated in said bore and abutting against one end of the casing for biasing said locking finger forwardly of the casing, a locking ear offset upwardly from the inner end of the bolt, a roller transversely journaled in the casing adjacent the inner end of the bolt, a lock-/ ing plate carried by said roller engageable with said locking ear for holding the bolt in a fixed position, a finger lever secured to said roller and extending upwardly through the top of the casin for moving said locking plate into locking engagement with the ear and means for tensioning said locking plate.

2. The combination of claim 1, wherein said last-mentioned means includes a leaf spring secured to the under surface of the top of the casing and seated on the roller.

3. A sash fastener comprising an elongated casing adapted to be secured upon a window sash, oppositely disposed U-shaped bearing ribs on the inner surfaces of the top and bottom of the casing, a locking bolt slidably mounted in the bearing ribs, a reduced locking finger on one end of the bolt, a central bore in the opposite end of the bolt, a projecting stud on the adjacent end of the casing, a spring seated in said bore and received on the stud for biasing said locking finger forwardly of the casing, a stop lug depending from said bolt adjacent the locking finger and adapted to engage one of of the U-shaped ribs for limiting inward movement of the locking finger, a locking ear offset verticall from the inner end of the bolt, a roller journaled transversely in the casing adjacent the inner end of the bolt, a locking plate fixed on the under surface of the roller, a finger lever secured to said roller and extending through the top of the easing for moving said locking plate into a horizontal position abutting the locking ear and holding the locking finger in an extended position, and resilient means for tensioning said locking plate.

CONSTANTINE JUSZCZAK.

REFERENCES CITED The following referenlces are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 148,578 Scrivner Mar. 17, 1874 185,769 Matson et al Dec. 26, 1876 266,799 Felsberg Oct. 31, 1882 532,935 Woolery Jan. 22, 1895 892,970 Bagby July '7, 1908 1,439,418 Hubbard Dec. 19, 1922