US 3605459 A
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Description (OCR text may contain errors)
Sept. 20, 1971 c. J. vAN DALEN 3,605,459
DOOR-LOCK Filed Dec. 1l, 1969 INVENT OR. C. J. VAN DALEN ATTORNEY AUnited States Patent O 3,605,459 DOOR-LOCK Christiaan Johannes van Dalen, Voorburg, Netherlands, assignor to De Staat der Nederlanden, Ten Deze vertegenwoordigd door de Directeur-Generaal der Posterijen, Telegrafie en Telefonie, Hague, Netherlands Filed Dec. 11, 1969, Ser. No. 884,248
Claims priority, application Netherlands, Dec. 16, 1968,
Int. Cl. E05b 19/00, 35 00, 47/04 U.S. Cl. 70-144 6 Claims ABSTRACT OF THE DISCLOSURE A door jamb and a door without a handle or keyhole containing a lock, which may be a magnetically operated tumbler type lock operated by a magnetic key, which when pressed against said door adjacent said lock, and mechanical means in the door initiated by pressing the door towards its jamb to move the relative parts of said lock to operate and retract the latch for the door and retain it retracted until the door is opened by a spring urged pin normally pressing against the door jamb.
RELATED APPLICATIONS Priority Netherlands application Ser. No. 6818018, led Dec. 16, 1968.
BACKGROUND OF THE INVENTION The invention relates to a door-lock, as is used for securing a door with respect to a door-post, having a lockbolt which, in the locking position, falls into a recess of the door-post.
Such a lock is generally known.
SUMMARY OF THE INVENTION BRIEF DESCRIPTION OF THE VIEWS The above mentioned and other features, objects and advantages of attaining them are described more specifically below by reference to embodiments of this invention shown in the accompanying drawings, wherein:
FIG. la is a schematic sectional view through a portion of the door and door jamb according to one embodiment of this invention showing a magnetically operated tumbler lock, latch, and a pin pushing against the door jamb;
FIG. lb is a view similar to FIG. la with the magnetic key applied to the lock for unlocking the two movable parts thereof including pushing of the door further toward its closed position to initiate the movement between said parts and retract the latch;
FIG. lc is a view similar to that of FIG. 1b but showing the door in its open position, the pushing pin extended, and the parts of the locking mechanism returned back into their normal locking positions; and
FIG. 1d is a view similar to the left end of FIG. l showing a mechanical means for operating the latch for the door instead of the electro-magnetic means shown in FIGS. la through lc.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS When closed, the door D is under a spring pressure v1, which tends to push it open against door jamb or post G by means of the pin p. This is prevented, however, by the lock-bolt S which engages in a seat or recess within the door-post G. The lock-bolt S can be withdrawn by energizing an electromagnet C. This Withdrawal, however, only takes place if a locking device comprising the parts A and B, are unlocked by a key so they are movable one with respect to the other (see FIG. lb). Then the pressing device comprising the pin p and the spring v1 can operate to open the door (see FIG. lc). This door unlatching process is initiated by unlocking the locking device by means of the key M and by exerting a light pressure on the door in the direction indicated by the arrow a in FIG. 1b. The key M, containing the proper magnet combination, performs the unlocking of the two parts A and B of the locking device. By the pressure exerted on the door D the pin p is moved forward with the arm c, so that the arm c cams against the pawl d to rotate it and put the spring v2 under tension. This tension moves the movable part B, so that the finger b actuates the switch sc, which switch closes a circuit in which a coil C is energized which is placed around the lock-bolt S to withdraw it from the door-post (FIG. 1b). The lock-bolt S is maintained in this retracted position by a hook e attached to the movable part B of the locking device, which hook e engages with a pawl f attached to the lock-bolt S until the door has entirely left the doorpost. After this the lock-bolt S is released and springs out again (see FIG. 1c).
In the embodiment described above the locking device is provided with magnetic means and the lock-bolt is withdrawn by energizing a coil. This embodiment can be used for example in a lock construction to be mounted in a door D, so that it is possible to cause a quite flat door such as of a safe, having neither a keyhole nor a knob, to spring open by means of a magnet combination mounted in a key together with a slight pressure on the door.
It is also possible, however, to use a mechanical embodiment of the locking device. FIG. ld illustrates the withdrawal of the lock-bolt S' by mechanical means. The device contains a lever h, one end of which is moved by the projection o attached to the movable part B of the locking device. The other Iend of the pivoted arm or lever h engages with a notch at the rear of the lock-bolt S. Thus in the unlocking position of the locking device, the lock-bolt S can be withdrawn against the spring pressure v4. If all the conditions for the opening of the door are fulfilled again, the locking device will mechanically control the lock-bolt S', after which the door D is pushed open by the spring-pin p. The spring-pin p then ensures the uncoupling of the pawl f, after which the lock-bolt springs out again.
While there is described above the principles of this invention in connection with specific apparatus, it is to be clearly understood that this descriptin is made only by way of example and not as a limitation to the scope of the invention.
1. A door lockable against a door jamb having a locking mechanism behind the outer surface of the door, said mechanism comprising:
(a) a latch movable in said door and engageable with said door jamb to lock said door to said jamb,
(b) resilient means in said door and engaging said jamb to urge said door away from said jamb,
(c) a lock having two relatively movable parts normally held immovable by tumbler pins,
(d) key means for operating said tumbler pins to unlock said two parts,
(e) cam means connected to said resilient means applying pressure to move one of said parts of said lock when said door is pushed in a direction against said resilient means, and
(f) means connected to said one part for moving said latch out of engagement with said jamb so said resilient means can open said door.
2. A door locking mechanism according to claim 1 wherein said resilient means comprises a pin mounted in said door movable perpendicular to the said surface thereof and projecting7 outwardly against said door jamb away from said surface.
3. A door locking mechanism according to claim 1 wherein said means connected to said one part for moving said latch comprises an electromagnetic means.
4. A door locking mechanism according to claim 3 wherein said electromagnetic means comprises a switch operated by said one part and a coil surrounding a proretracted until said door is open and then releasing said latch.
6. A door locking mechanism according to claim 1 wherein said key is magnetic and said tumbler pins are magnetically responsive to said magnetic key.
References Cited UNITED STATES PATENTS ALBERT G. CRAIG, JR. Primary Examiner U.S. Cl. X.R.