Locks – Special application – For closures
Patent
1989-05-03
1991-07-02
Smith, Gary L.
Locks
Special application
For closures
70110, E05B 5900
Patent
active
050276255
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a lock with a catch and bolt, which can be activated from a lock cylinder and the catch of which can be retracted by a pusher nut, as well as with a locking slide, in the locked position of which the catch is stopped from being pushed in. In a release position, in which the locking slide can be adjusted with the help of the pusher nut or the lock cylinder, the locking slide releases the catch, the locking slide being changed over from the release position to the locked position by the exertion of pressure on the catch.
Such a lock is disclosed in the older application of the Applicant (German Offenlegungsschrift No. 3,632,729), which was filed before the priority date of the present application but published later. Admittedly, the release position in the older lock is made possible with the help of the lock cylinder, but the safety bolt is not fixed. Moreover, the known lock made no provisions for a so-called panic function.
It is an object of the present invention to improve the older lock, so that, when pressure is exerted on the catch, not only is the catch arrested via the slope of the catch, but the bolt is also fixed.
This objective is accomplished by a lock, in which the locking slide is connected via a lever system with the safety bolt in such a fashion that, when the locking slide is shifted from the release position into the locked position as pressure is exerted on the catch, the safety bolt is shifted out of the lock.
For those skilled in the art, there are various possibilities of realizing such a lever system and developing an effective connection between the locking slide and the bolt. There is also the possibility of extending the bolt in different length. Since the locking slide is an essential part of the locking mechanism of the catch of the lock, it is also meaningful to design the lever system so that, as the locking slide moves, the lever system also presses the bolt into the closing position.
Preferably, the locking slide and the lever system are acted upon by a spring, which forces the locking slide into the locking position.
Further characteristics of the dependent claims arise out of the description of an example of the operation. The example of the operation is explained by means of the drawing, which comprises several Figures.
FIG. 1 shows a plan view of the interior of the lock, the upper plane of the active elements being emphasized.
FIG. 2 shows a view similar to that of FIG. 1, in which, however, a plane below the active elements is emphasized.
FIG. 3 shows the lock of FIG. 1 with the catch pushed in and the pusher nut rotated (first plane).
FIG. 4 shows the arrangement of FIG. 3 in a second lower-lying plane.
FIG. 5 shows the lock as the lock cylinder is activated.
FIG. 6 shows the lock being closed by the lock cylinder.
The lock 1 of FIGS. 1 and 2 has a cuff 2, a lock case 3 with lock bottom 3', a bolt 4, a catch 5, a tumbler 6, which is acted upon by a tumbler spring 57 perpendicularly to the direction of motion of the bolt 4. The tumbler 6 at the top, the bolt 4 and the lock bolt tumbler 53 form three parts that slide one on top of the other. Moreover, a pusher nut 8 is present, which is acted upon by a nut spring 9 via a transition piece 10. The pusher nut 8 runs out into an arm 29, which engages the catch tail 5" with a projection 30, the catch 5 having a catch head 5' and a catch tail 5". The catch 5 is acted upon by a catch spring 11 in the direction from the cuff 2. The catch tail 5" is provided with an elongated hold 12, through which a guide bolt 13 passes. The catch 5 furthermore has a recess 15, which is shaped like a tunnel and through which the catch-side end 16' of an exchange lever 16 reaches.
The exchange lever 16 has approximately a J shape, is provided with a short hold guide 17 and hinged there with clearance on a pin 18. At its lower thickened end 16" over a joint 19, the exchange lever 16 carries a cam 20. The closing beard 21 of a closing cylinder 22 bumps against the lower stop end 20' of the cam 20. Moreover, the cam 20 has
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Dino Suzanne L.
Smith Gary L.
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