US2933338A

US2933338A - Friction window lock

Info

Publication number: US2933338A
Authority: US
Inventors: Wallace W Byars
Original assignee: Individual
Current assignee: Individual
Priority date: 1959-04-16
Filing date: 1959-04-16
Publication date: 1960-04-19
Anticipated expiration: 1977-04-19

Description

April 19, 1960 w. w. BYARS FRICTION WINDOW LOCK 2 Sheets-Sheet 1 Original Filed Aug. 6, 1954 FIG... 1

INVENTOR.

ATTORNEY April 19, 1960 w, w BYARS 2,933,338

FRICTION WINDOW LOCK Original Filed Aug. 6, 1954 2 SheetsSheet 2 i M a I 1 3i 6 6 FIG-5- WALL ACEhLB-YARS INVENTOR.

ATTORNEY FRICTION WINDOW LOCK Wallace W. Byars, Kell, Ill.

Substituted for abandoned application Serial No. 448,211,

August 6, 1954. This application April 16, 1959, Serial No. 806,968

1 Claim. (CL 292-83) This invention relates to window locks and is a substitute application predicated on application Serial No. 448,211, filed August 6, 1954, now abandoned, and the principal object of this invention is to provide a friction window lock that will lock the window at any height desired and will eliminate the rattle and vibration usually found when conventional window locks are used.

Another object of the invention is to provide a friction lock that by pressure and friction between the window sash and window jamb will lock the window in closed or open position.

A further object of the invention is to provide a friction window lock that will efiiciently operate either with a wooden sash and frame or a metal sash and frame.

A still further object of the invention is to provide a friction window lock that is simple in construction, efiicient in operation and easily installed as desired.

With the above and other objects and advantages in view, the invention consists of the minor details of construction, arrangement and combination of parts more fully hereinafter described, claimed and illustrated in the accompanying drawings in which:

Figure 1 is an interior elevational view of a window sash and window frame, partly broken away and partly in section, to show the installation of a friction window lock embodying the invention;

Figure 2 is a perspective view of the friction window lock embodying the invention;

Figure 3 is a front elevational view of the friction window lock installed in a window sash;

Figure 4 is a vertical sectional view on the line 4-4 of Figure 3, showing the friction window lock in locked position;

Figure 5 is a vertical sectional view similar to Figure 4, showing the friction window lock in unlocked position, and

Figure 6 is a transverse sectional view on the line 66 of Figure 3.

Referring more in detail to the drawings, wherein like parts are designated by like reference numerals a friction window lock embodying the invention is generally designated by the reference numeral 10.

' The friction window lock 10 comprises a frame 11 having a pair of quadrilateral

shaped side portions

12 and 13, respectively, which are formed integral with a rectangular shaped base portion 14. The side portions are in parallel spaced relation to each other by reason of the base portion 14.

Extending in upwardly inclined relation to the base portion 14 from each end edge thereof and integral therewith are

wing portions

15 and 16, respectively. Extending outwardly from each end of each wing portion and integral therewith is a

foot portion

17 and 18, respectively. The

foot portions

17 and 18 extend from the end of the wing portions at such an angle that they will lie in the same plane and will be parallel to a plane passed through he base portion 14 of the frame 11.

An elongated flat spring 19 is fixed atone end to the foot 18 and extends between the

side portions

12 and 13 of the frame 11 within the wing portion 16i The spring 19terrninatesin an arcuate pressure end 20 adjacenttlie wingportionli' Superimposed on the end of the spring 19fixed to the foot 18 and fixed to the end of the spring 19, is'o'ne end of a pressure plate 21. The pressure plate 21 extends between the

side portions

12 and 13 of the frame 11 above the spring 19 and terminates adjacent the wing portion 15.

A friction pad 22 of rubber or other suitable material is fixed to the free end of the pressure plate 21 in any well-known manner. Slits 23 are formed inwardly and downwardly in the ends of the friction pad 22. Thus, when an attempt is made to open the window by force, the relatively thin portion of the friction pad outwardly of the slits 23 will roll inwardly upon itself making it impossible to open the window due to the increased thickness caused by such rolled portion.

Each of the

side portions

12 and 13 is provided with an opening 24 which rotatably receives the trunnions 25 of a cam 26. A square shaped bore 27 extends through the trunnions and cam to receive a similarly shaped stem 28 of an operating handle 29.

The foot 17 is provided with a screw receiving opening 30, and the foot 18, the end of the spring 119 fixed thereto and the end of the pressure plate 21 fixed to the end of the spring 19 are provided with a screw receiving opening 31.

To install the window lock in the window sash 32 the window sash 32 is mortised as at 33. The friction window lock 10 is placed in position, as shown in Figure 1, and wood screws 34 are inserted into the screw openings 30 and 31 and when screwed into the sash 32, as in Figures 4 and 5, will retain the friction window lock in the mortise in the window sash. An opening 34 in the window sash 32 communicating with the mortise 33 will permit the operating handle 29 to extend outwardly of the sash 32, as shown in Figure 6.

The friction window lock is mounted in the window sash 32 so that the friction pad 22 will engage the window jamb 35 of the window frame, as shown in Figure 1. A sill 36 completes the conventional window frame.

When the window sash 32 is to be locked in position, it is raised to any desired height and the operating handle 29 turned to force the cam 26 into engagement with the spring 19 which in turn applies pressure to the pressure plate 21 so that the friction pad 22 is forcibly engaged with the jamb 35, as in Figure 4.

The window sash 32 will thus be locked in position until the operating handle 29 is turned in the opposite direction to move the cam 26 to the position shown in Figure 5. A detent 36 is provided in each

side portion

12 and 13 to prevent the cam 26 from being moved past center so that it can be turned only from the position of Figure 5 to the position of Figure 4 or vice versa.

The operation of the window lock is as previously described and it is believed that the construction of the same will be apparent to those skilled in the art.

It is also to be understood that changes in the minor details of construction, arrangement and combination of parts may be resorted to provided they fall within the spirit of the invention and the scope of the appended claim.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

In a friction window lock comprising a frame, a spring mounted in said frame, a pressure plate mounted in said frame outwardly of said spring for coaction with said spring, and means including a cam mounted on the frame for forcing said spring into engagement with said pressure plate whereby to resiliently force the latter into engage nient with a w indow jamb, the provision of an elongated friction pad on the outer face of saidpressure plate, said pad having slits in the ends and extending the width end with a portion which will roll upon itself when the P i mqved'in an opposite direction in frictional contact 3 with the window jamb. a

' 'eesaasa- References Cited in the file of this, patent V UNITED STATES PATENTS Jones .L June 6, 1876 Mead Oct. 30, 1877 Heidt May 25, 1897 Adickes'.. Nov. 9, 1915