Locks – Operating mechanism – Using a powered device
Reexamination Certificate
1999-12-28
2001-11-20
Gall, Lloyd A. (Department: 3627)
Locks
Operating mechanism
Using a powered device
C070S277000, C070S278600, C070S278700, C070S283000, C070S292000, C070S144000, C070S251000
Reexamination Certificate
active
06318136
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field of the Invention
The invention relates to an electromagnetically controllable safety lock with a locking bar having a passage pin, and with an electromagnet acting as a retaining magnet, said electromagnet blocking or releasing the retraction of the locking bar.
2. Description of the Prior Art
Such a lock has become known from EP 0 427 188. The electromagnetically controlled lock for safe deposit boxes described therein has an electromagnet secured in the housing, faced by an armature supported on a locking lever. The locking lever, shaped in a complex way, is coupled with a control lever via a supporting pin, control came and a spring, said control lever having a passage pin channel. Furthermore, provision is made for a locking slide, which supports a passage pin engaging the control lever. Blockage and release by swivel motions require exact interaction between retaining magnetic forces, control cams, control pins, supporting pins, springs and the passage pin. The components may have hardly any play or wear, otherwise failure is caused by tilting. EP 0 228 027 concerns an electromagnetically controlled lock for safe deposit boxes as well, in a housing, where a bank lock mechanism is accommodated in the front-side opening of said housing in addition to the lock for the customer. An electromagnet is accommodated in a rear-side recess of the housing. A locking lever and a control lever are arranged below the main locking bar and are therefore relatively difficult to access. The locking lever supports a magnetic armature opposing the yoke of said electromagnet. In the present case, too, exact interaction between the magnet, the control and locking levers and the passage pin is important, whereby close manufacturing tolerances have to be maintained in order to assure flawless functioning in the long run.
SUMMARY OF THE INVENTION
The invention is based on the problem of improving a lock with the features specified above in such a way that it can do with elements that can be manufactured in a simple way; that it is operationally reliable; and that it can be employed in many different ways. According to the invention, the locking bar moves a slider provided with teeth, said slider driving a blocking plate provided with a passage pin channel.
Furthermore, said blocking plate is coupled via a spring with a control plate having an angularly offset passage pin channel. The control plate supports an armature, which is retained by the electromagnet when the latter is live, which causes both channels to be aligned with the axis of the lock and to permit the passage pin to pass.
The novel type of lock with swiveling blocking and controlling elements can basically be employed in two variations: in configuration A, it receives a normal, heavy locking bar, which is moved by means of a handle via a driving nut. With configuration B, provision is made only for an auxiliary locking bar provided with a driving pin.
The driving pin engages in the locking bar of a main lock, which may be designed in the form of a double-bit lock or combination lock. The combination permits the “four eyes principle” for increasing the safety.
The elements required for controlling the lock are identical in the two configurations. In a preferred form of embodiment, the risk of blocking the lock is substantially reduced in that provision is made for two identical electromagnets, which can be controlled selectively.
REFERENCES:
patent: 4984441 (1991-01-01), Mauer
patent: 0228027 (1987-07-01), None
patent: 0427188 (1991-05-01), None
patent: 0429712 (1991-06-01), None
patent: 0819813 (1998-01-01), None
patent: 2635554 (1990-02-01), None
Gall Lloyd A.
Mauer GmbH
Schindler Edwin D.
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