Electronic safety-lock
OwnerAntonio Solari, Roberto Mottolainventors
Life of this patent
Estimating the term…
Abstract
Electric safety-lock consisting of a motor (3) which by means of movement reduction gears (4, 5) drives a worm screw (6) axially mounted on the driven wheel (5). A slider (8) is keyed onto the worm screw (6) on which the mobile lock studs (9) entering the holes (10) in the locking box (1) are fastened. A mobile rack (13) is mounted on the slider (8); the rack (13) may be operated in case of emergency by a gear wheel (14) meshing with a cylinder or sprocket latch (17) and functioning when using a key (15) or knob. An electric circuit provided with sensors (24, 25, 26) provides for remote control (34) of the door lock via opening (A) and closing push-buttons (C). The safety-lock may also be equipped with an alarm system.
Claims10
Electronic safety-lock mounted in a box-shaped frame (1) secured to a mobile wing (2) of a door and provided with one or more lock studs (9) entering related borings (10) drilled in a lock plate (11) fastened onto an edge of a fixed door wing (12) or to a contour wall characterized in that it is comprised of:
- a motor (3) operating on low voltage d.c. and rotating in both directions
- a driving gear (4) keyed onto a motor shaft
- a driven gear (5) meshing with the driving gear (4) at a speed reduction ratio;
- a worm screw (6) axially mounted on the driven gear (5) and revolving with the latter;
- a threaded slider (8) keyed onto the worm screw (6);
- one or more closing studs (9) rigidly connected to the slider (8) and cooperating with the boring(s) (10) in the lock plate (11);
- a rack (13) rigidly connected to the threaded slider (8) and provided with a lower lock hole (19);
- a gear wheel (14) meshing with the above mentioned rack (13);
- a cylinder or sprocket latch (17) which can be axially moved inwards against the action of a spring loaded coil, to engage the gear wheel (14) with the aid of a key (15) fitted into the cylinder from outside, a surface of the cylinder or sprocket latch (17) being cone-shaped tapered (18) so that this cylinder or sprocket latch can be hand operated in emergency cases;
- a knob (16) coupled to the gear wheel (14) to open the door from inside in case of emergency, after having released the rack (13) by means of a pin tooth (36) located inside the door;
- an L-shaped ratchet (21) located below the rack (13) and oscillating on a pin (22) transverse to the frame, so that a vertical flange of the ratchet (21) will touch the cone-shaped portion (18) of the cylinder (17) for emergency opening;
- a blocking pin tooth (20) located on an upper face of a horizontal flange of the ratchet (21) entering the hole (19) in the rack (13) to ensure its interlock;
- an electromagnet (23) activating the ratchet (21) to release the rack (13), provided with a return spring;
- sensors (24, 25, 26) to detect the release position of the ratchet (21) as well as the open and closed positions of the rack (13);
- a remote control (34) with opening push-button (A) and closing push-button (C), controlling an electric operating circuit.
Dependencies are inferred from the claim text.