US2873990A - Closure fastener - Google Patents

Description

ET AL 2,873,990

Feb. 17, 1959 P. FRIEDMAN CLOSURE! FASTENER Filed Nov. 6, 1956 v 1 INVENTORS PHILIP FRIEDMAN ATTORNEY FIG.4.

BY GEORGE J. FRIEDMAN glmx Hm FIGJ.

United States Patent CLOSURE FASTENER Philip Friedman and George J. Friedman, New York, N. Y.; Iris Friedman and Hyman Orenstein, executors of said Philip Friedman, deceased, assignors to Rose Grossman, Ruth Stein, Iris Friedman, and Hyman Orenstein as trustees for Barry Friedman, and Iris Friedman and Hyman Orenstein as trustees for Robert Friedman, doing business as G. F. S. Investing (10., Brooklyn, N. Y.

Application November 6, 1956, Serial No. 620,660

2 Claims. (Cl. 292-228) Our invention relates to a new type of closure fastener and lock designed for use on a door.

One of the objects of our invention is to provide a door lock which is contained entirely within the door knob and isoperated by a removable key, the installation of which will necessitate the drilling of only one hole through the door frame.

It is a further object of our invention to provide such a door lock which is fool-proof, easy to install and simple to operate.

A further object of our invention is to provide such a lock and closure fastener especially suited to be adapted for use on outside screen doors and storm doors which are in common use today. Our invention eliminates many of the necessary parts of a tumbler-type lock which is ordinarily used on such doors and is easier to install than the present tumbler-type locks currently in use. Further objects and advantages of our invention will appear in the drawings and specifications herein. Similar numerals through the several views of the drawings refer to similar parts of our invention. We attain the objects and advantages of our invention by the device illustrated in the accompanying drawings.

Figure l is a side plan view of our device showing it mounted on the inside of a door and door frame with portions of the door and frame cut away;

Figure 2 is a cross-section along the lines 2--2 in Figure 1;

Figure 3 is a top plan view;

Figure 4 is a plan View of the inside frame of our device with the plate removed showing the locking mechanism; and

Figure 5 is the stop ferrule of our device.

This door fastener operates on the principle of a door handle with a latch portion 11 adapted to engage a strike bar 12. The latch portion 11 may be disengaged from the strike bar 12 by rotating the door handle 10 approximately 90 degrees. The device is constructed around a shaft 13 which has a square cross-section. The shaft 13 is inserted into an outer door knob assembly 14 which comprises a door knob 15, a shank 16, and an outer plate 17.

The locking mechanism is contained in a frame 18 which is attached to the inner side of the door and which fits over the shaft 13. A stop ferrule 19 goes over the shaft 13 and fits within the frame 18. The stop ferrule 19 has a pair of shoulders 19a. A stop slide 20 slides within the frame 18, and has stop faces 20a and spring seats 20b, and is forced by springs 21 against the stop ferrule 19. The pressure of the stop slide 20 against the stop ferrule 19 maintains the shaft 13 in a position as shown in Figure 4 of the drawings.

If either the door knob or the handle 10 is turned to disengage the latch 11, it causes the stop ferrule 19 to rotate and press against the stop slide depressing the ice springs 21. As soon as the pressure is removed from the door knob 15 or the door handle 10, the shaft 13 is returned to normal position by the stop slide 20. At the top of the stop ferrule 19, there is a seat 27 which receives the tip 22 of a lock catch mechanism 23.

The lock catch mechanism 23 slides on beads 24 inside the frame 18 and it is actuated by a control tab 25 which protrudes from the frame 18 through the opening 26. The tab 25 may be moved up and down within the limits of the opening 26 pushing the lock catch mechanism 23 up and down and moving its tip 22 within the seat 27 of the stop ferrule 19 and out again thereby locking and unlocking the lock.

The handle 10 is placed on the shaft 13 and may be swedged on to the frame 18. The entire door lock is screwed on the door by means of screws 28 which fit into threaded portions 29. The threaded portions 29 are a part of the front plate 17. Thus, it will be seen that in order to install the look a hole of one-half inch in diameter or less is needed for the shaft 13 and two holes of approximately three-eighths of an inch or less for the screws 28. This feature makes it very easy to install our fastener on a door since most other fasteners which have door knobs and handles on both sides of the door require a much larger opening to be either drilled or gouged through the door if it is a wooden door and require tools not ordinarily found around the home as well as skill not ordinarily found in the average householder.

While We have described the preferred form of our invention, there may be other forms in which our invention may be embodied without leaving the scope of the invention and we do not want to be limited to the exact details as set forth herein but wish to be protected for all constructions within the limitations of the claims following.

Wherefore, we claim:

1. In a closure fastener for a swinging door: a hollow frame; an outer knob connected to an inner handle by a shaft extending through the said hollow frame, a ferrule, within the hollow frame, non-rotatably mounted on the shaft having a pair of shoulders spaced on opposite sides of the shaft; a stop slide slideably mounted within the frame, with cross sectional dimensions substantially the same as the inside dimensions of the hollow frame, provided with stop faces at one end thereof adapted to bear against the shoulders on the ferrule, and at least one seat for a compression spring, said seat having a bearing surface at least as wide as the diameter of the spring; at least one compression spring bearing against the seat in the said stop slide at an end remote from the stop faces and against a portion of the hollow frame; and the said inner door handle having a nosed latch portion adapted to engage a strike rod mounted on the door frame for the said door when the door is in closed position; whereby the action of the spring and stop slide yieldably maintain the latch portion of the handle in latched position.

2. A closure fastener as defined in claim 1 having a I stop seat on the ferrule disposed between the shoulders on the ferrule and a lock within the hollow frame comprising a slideable member having an operating tab and a latching tip adapted to fit into the mentioned stop seat.

References Cited in the file of this patent UNITED STATES PATENTS 1,768,193 De Vita June 24, 1930 2,707,121 Behnke Apr. 26, 1955 2,733,089 Grevengoed Jan. 31, 1956 2,796,272 Quinn June 18, 1957 2,837,364 Loeb June 3, 1958

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