US1846427A

US1846427A - Window lock

Info

Publication number: US1846427A
Application number: US513472A
Authority: US
Inventors: John W Kuhrt
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-02-05
Filing date: 1931-02-05
Publication date: 1932-02-23
Anticipated expiration: 1949-02-23

Description

J. W. KUHRT Feb. 23, 1932.

WINDOW LOCK Filed Feb.

John MKM/hr1* Patented Feb. 23, 1932 UNITED STATES JOHN W. KUHRT, OIF TOLEDO, OHIO WINDOW LOCK .Application led February 5, 1931. Serial No. 513,472.

This invention relates to locks for windows of the sliding double-sash type and has for its object the provision of a simple, improved and easily installed lock of this character which is operable to lock the two sash of the window in any position of relative adjustment and to bind the sash firmly together in partially open or closed positions to prevent rattling.

The invention is fully described in the following specification, and while in its broader aspect it is capable ot' embodiment in numerous forms, one embodiment thereof is illustrated in the accompanying drawings, in which Figure l is a fragmentary perspective view of a pair of window sash equipped with lmy improved lock and secured together thereby in closed position. Fig. 2 is a fragmentary horizontal section taken on the line 2--2 in Fig. 1 with the locking arm removed.

Fig. 3 is a section on the line 3-3 in Fig. 1.

Fig. 4 is an enlarged detail of the guide member of the lock and its manner of attaching to the upper sash, with parts in section, and

Fig. 5 is an enlarged side elevation of a portion of the guide rod and of the locking arm in engagement therewith with portions of the latter broken away.

Referring to the drawings, 1 and 2 designate the upper and lower sash, respectively, of a window disposed in the same relation they would have in a window casing (not shown) to permit relative raising and lowering movements thereof as is customary with window sash of this character.

The locking means embodying the invention includes a guide rod or standard 3, preferably 10 or 12 inches in length, fixed to and rising from the top of the lower cross member of the upper sash adjacent to one side upright thereof in slightly spaced parallel relation thereto and having its upper end angled or otfset, as at 4, and fixed to the inner side of the adjacent sash upright by a screw 5.

The guide member 3, for the purpose of strength, preferably comprises an outer tubular member 6 (Fig. 4) and an inner reinforcing member 7 of rod form fitted in the tubular member and extending from the upper offset end 4 of the latter to a distance below the tubular member. The lower extended end of the rod member 4; is sharpened to adapt it to be forced into the lower cross member of the upper sash 1 for anchoring purposes. The member 6 is further secured at its lo-wer end to the sash l by a base plate 8, which has a hole for snugly receiving Said member and is secured to the top surface of the lower cross member of the upper sash by a single screw 9. It is thus apparent that the guide member 3 can be securely and easily fastened to the sash by merely forcing the lower projecting end of the rod 7 into the cross member of the sash and then using a single screw for securing each the plate 8 and other end of the member 6 to the sash.

A locking arm l() projects fromthe guide member 3, having a hole through its inner end which loosely receives the guide member to permit the arm to be :freely moved up and down on the guide member, except when the arm is canted relative thereto to cause diagonally opposite edge walls of its opening to have gripping engagement with the guide member as indicated in Fig. 5. The arm 10, if swung outward from the upper sash, so that this outer end projects over the top of the lower sash, rests onthe latter whether in closed or partially open position, and coacts with the guide member to prevent a relative inward movement of the two sash, that is, a relative raising of one and lowering of the other, for it is apparent that any relative inward movement of either sash will impart a further canting `movement or pressure to the lever arm to cause it to increase its gripping engagement with the guide member.

For the purpose of greater security and also to cause the lock to effect a binding ac- 90 tion between the two sash, I provide a plate 11 at the outer top edge of the lower sash in opposition to the guide member 3 and provide such plate with a forwardly projecting arcuate cam surface 12 with which a locking finger 13 on the outer end portion of the arm l() may have locking engagement. The iinger 13 is pivoted on the arm 10 to have swinging movements in a plane transverse thereto, and it is notched to inter-engage with the arcuate flange on the plate 11 which forms the cam surface 12. It is thus apparent that the finger 13 may be engaged with the cam 12 and cooperate therewith and with the arm 10 and guide member 3 to draw the associated portions of the two sash firmly together when the finger is swung, in the present instance, in clockwise direction, into binding engagement with the cam. The nger 18 is retained on the stud end portion 14 of the arm 10 by a nut 15. It is preferable to have the length of engagement of the nut with the stud 14 suliiciently long to allow for an adjustment of the nut sothat one or more spacing washers 16 may be inserted or removed' from between the nut and finger, depending'on the thickness of the top member of the lower sash, or to compensate for a slight variance in the position of mounting of the guide member 3 on the upper sash. The'plate 11 has a depression 17 in its top edgeiin which the arm 10 seats when locked thereto.

Itis sometimes desirable to have 'the locking arm 10 held in elevated position on the guide member 3 free from engagement with the lower sash and this may be accomplished by providing a notch4 or recess 1S in the upper end portion of the guide member 3 with which the lower edge wall of the locking arm opening may be engaged, as indicated in dotted lines in Fig. 1.

I wish it understood that my invention is not limited to any specific construction, arrangement or form of the parts, as it is capable of numerous modifications and changes without departing from the spirit of the claims.

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

1. The combination with a pair of window sash mounted for vertical sliding movement, of a vertical guide member secured to the upper sash, a locking arm slidingly mounted on said member and adapted to project laterally therefrom over the adjacent end of the other sash and to be locked to saidmember by canting pressure relative thereto, and a finger pivotallyV carried by said arm and adapted to have camming connection with the lower'sash to bind it to the upper sash in adjusted relation thereto.

2. The combination with a pair of window sash mounted for vertical sliding movements, of a vertical guide member secured to the upper sash, a locking arm slidingly mounted onV said member and adapted to project laterally therefrom over the upper end ofthe other sash and to be locked to said member by canting pressure relative thereto, a cam member secured to the top portion of the lower sash in opposition to the upper sash,- and a finger movably carried by said arm and adapted to have engagement with said cam member to cooperate with the arm and guide member to firmly clamp the sash in predetermined relation.

3. The combination with a pair of window sash mounted for vertical sliding movements, of a vertical guide member secured to the upper sash, a locking arm slidingly mounted on said member and adapted to project laterally therefrom over the upper end of the other sash andto be locked to said member by canting pressure relative thereto, a cam member secured to the top portion of the lower sash in opposition to the upper sash, and a linger movably' carried by said arm and adapted to have engagement with said 'cam member to cooperate with the arm and guide member to firmly clamp the sash in predetermined relation, and means for adjusting said finger lengthwise of the arm.

4. The combination with a pair of window sash mounted for vertical sliding movements, of a vertical guide member secured to the upper sash, a locking arm slidingly mounted on said member and adapted to project laterally therefrom over the upper end of the other sash and to be locked to said member by canting pressure relative thereto, a cam member secured to the top portion of the lower sash in opposition to the upper sash, and-afinger movably carried by said arm and adapted to have engagement with said cam member to cooperate with the arm and guide member to rmly clamp the sash in predetermined relation, a nut threaded on the outer end of the arm to hold the finger. in opposition thereon, and spacing washers between the nut and linger capable of removal for lengthwise adj ustment of the finger on the arm.

5. The combination with a pair of window sash mounted for vertical sliding movements, of a vertical guide member secured to the upper sash, a locking arm slidingly mounted on said guide member and adapted to project laterally therefrom over the upper end ofthe f other sash and to be locked to said member by cant-ing pressure relative thereto, a linger pivotally mounted on the outer end of said arm, a plate secured to the top edge of the lower sash opposed to the upper sash, said plate having a notch in its top forming a seat for said armV and having a cam portion projecting away from the sash with which said finger may have locking camming engagement to draw` thel adjacent end portions of the two sash together and to lock the arm in its said seat.

6. The combination with a pair of window sash mounted for vertical sliding movements, of a vertical guide member rising from the cross member of the upper sash and secured thereto at one end and at its oppositeend to a side portion ofthe sash, said guide member comprising a tubular part with its upper offsetV end lsecured to` the side member ofthe sash, a plate receiving the lower end of said tubular part and secured to the cross memher of the upper sash, a rod tted in said tubular part substantially throughout its length and having its lower end projected beloW the tubular part and inserted in the cross member of the sash, and a locking arm slidngly mounted on said guide member and cooperating therewith to lock the two sash in adjusted relation.

In testimony whereof I have hereunto signed my name to this specification.

JOHN W. KUI-IRT.