US4568998A — Electronic code controlled deadbolt

Claim 1

Independent Claim 235 words

An electronic lock system for power positioning of a deadbolt into closed and opened positions in a door jamb including; a deadbolt, a radio transmitter including a "close" and an "open" encoding means selectively placing distinct tone frequencies on a carrier wave in the form of a "close" code signal or an "open" code signal, a radio receiver including a "close" decoder means responsive to said distinct "close" code signal, an "open" decoder means responsive to said distinct "open" code signal, and logic means separately responsive to the "close" and "open" decoder means and one having a "close" output and the other having an "open" output, switch means comprised of a "close" relay means with a latch logic means responsive to said "close" output for latching into a forward mode, and an "open" relay means with a latch logic means responsive to said "open" output for latching into a reverse mode, a reversible motor drive for moving the deadbolt into either a "close" position or an "open" position in response to either the "close" or "open" mode of the switch means, and a limit switch in circuit to the "close" latch logic means and operated by the deadbolt in the "close" position to release the "close" relay means, and a limit switch in circuit to the "open" latch logic means and operated by the deadbolt in the "open" position to release the "open" relay means.

Claim 2

Dependent Claim 235 words

An electronic lock system for power positioning of a deadbolt into closed and opened positions in a door jamb including; a deadbolt, a radio transmitter including a "close" and an "open" encoding means selectively placing distinct tone frequencies on a carrier wave in the form of a "close" code signal or an "open" code signal, a radio receiver including a "close" decoder means responsive to said distinct "close" code signal, an "open" decoder means responsive to said distinct "open" code signal, and logic means separately responsive to the "close" and "open" decoder means and one having a "close" output and the other having an "open" output, switch means comprised of a "close" relay means with a latch logic means responsive to said "close" output for latching into a forward mode, and an "open" relay means with a latch logic means responsive to said "open" output for latching into a reverse mode, a reversible motor drive for moving the deadbolt into either a "close" position or an "open" position in response to either the "close" or "open" mode of the switch means, and a limit switch in circuit to the "close" latch logic means and operated by the deadbolt in the "close" position to release the "close" relay means, and a limit switch in circuit to the "open" latch logic means and operated by the deadbolt in the "open" position to release the "open" relay means.

Claim 3

Dependent Claim 30 words

The electronic lock system as set forth in claim 1, wherein the encoder means includes a separate plurality of distinct tone frequency generators producing the "close" and "open" code signals.

Claim 4

Dependent Claim 59 words

The electronic lock system as set forth in claim 1, wherein the encoder means includes a plurality of distinct tone frequency generators and one in excess of the number of tone signals in either the "close" or "open" code signals, said one excess tone generator being selectively operative with at least one other of said plurality of tone generators.

Claim 5

Dependent Claim 46 words

The electronic look system as set forth in claim 1, wherein the decoder means includes separate decoders and one including at least one decoder means responsive to the "close" code signal and the other including at least one decoder means responsive to the "open" code signal.

Claim 6

Dependent Claim 44 words

The electronic lock system as set forth in claim 1, wherein the decoder means includes separate decoders and one including a plurality of decoders responsive to the "close" code signal and the other including a plurality of decoders responsive to the "open" code signal.

Claim 7

Dependent Claim 30 words

The electronic lock system as set forth in claim 5, wherein the logic means for the "close" and "open" decoder means is each comprised of an OR-gate selectively responsive thereto.

Claim 8

Dependent Claim 32 words

The electronic lock system as set forth in claim 5, wherein the logic means for the "close" and "open" decoder means is each comprised of a network of NAND-gates selectively responsive thereto.

Claim 9

Dependent Claim 52 words

The electronic lock system as set forth in claim 1, wherein the decoder means includes a plurality of decoders and one in excess of a number of frequencies comprising the "close" and "open" code signals, the logic means being selectively responsive to said one excess decoder and at least one other decoder.

Claim 10

Dependent Claim 31 words

The electronic lock system as set forth in claim 7, wherein the logic means for the "close" and "open" decoder means is comprised of a network of OR-gates selectively responsive thereto.

Claim 11

Dependent Claim 71 words

The electronic lock system as set forth in claim 1, wherein the switch means includes an input OR-gate responsive to the "close" output of the decoder means and to an unactuated position of the limit switch to the "close" latch logic means, and includes an input OR-gate responsive to the "open" output of the decoder means and to an unactuated position of the limit switch to the "open" latch logic means.

Claim 12

Dependent Claim 79 words

The electronic lock system as set forth in claim 1, wherein the switch means includes an input OR-gate responsive to the "close" output of the decoder means and to a NAND-gate responsive to an unactuated position of the limit switch to the "close" latch logic means, and includes an input OR-gate responsive to the "open" output of the decoder means and to a NAND-gate responsive to an unactuated position of the limit switch to the "open" latch logic means.

Claim 13

Dependent Claim 38 words

The electronic lock system as set forth in claim 11, wherein an LED is in circuit with the input of one of the NAND-gates with the latch logic means associated therewith, to indicate forward and reverse modes respectively.

Claim 14

Dependent Claim 84 words

The electronic lock system as set forth in claim 1, wherein each latch logic means is comprised of a pair of NAND-gates with the output of one connected to the input of the other, with the input of one responsive to the decoder means output associated therewith and the input of the other responsive to the limit switch associated therewith, and with the output of one to the base of a transistor switched ON and OFF thereby to control a relay switch associated therewith.

Claim 15

Dependent Claim 119 words

The electronic lock system as set forth in claim 1, wherein the switch means includes an input OR-gate responsive to the output of each decoder logic means associated therewith and to a NAND-gate responsive to an unactuated position of the limit switch associated therewith, and wherein each latch logic means is comprised of a pair of NAND-gates with the output of one connected to the input of the other, with the input of one responsive to the decoder means output associated therewith and the input of the other responsive to the limit switch associated therewith, and with the output of one to the base of a transistor switched ON and OFF thereby to control a relay switch associated therewith.

Claim 16

Dependent Claim 64 words

The electronic lock system as set forth in claim 1, wherein the reversible drive motor is seated by spring means to be unseated by a screw drive into the deadbolt when obstructed in the forward mode to "close", there being an actuator shifted thereby to actuate a reverse switch in circuit to the "open" relay means to set the reverse mode of motor operation.

Claim 17

Dependent Claim 49 words

The electronic lock system as set forth in claim 15, wherein a mode conditioning means is controlled by actuation of the reverse switch and is comprised of an AND-gate at the "open" output of the logic means and with inputs from said logic means and from said reverse switch.

Claim 18

Dependent Claim 57 words

The electronic lock system as set forth in claim 15, wherein a mode conditioning means is controlled by actuation of the reverse switch and is comprised of a AND-gate at the "open" output of the logic means and with inputs from said logic means and from an ignition switch controlling the operation of a vehicle prime mover.

Claim 19

Dependent Claim 64 words

The electronic lock system as set forth in claim 15, wherein a mode conditioning means is controlled by actuation of a reverse switch and is comprised of a three input AND-gate at the "open" output of the logic means and with inputs from said logic means and from said reverse switch and from an ignition switch controlling the operation of a vehicle prime mover.

Claim 20

Dependent Claim 92 words

The electronic lock system as set forth in claim 15, wherein a mode conditioning means is controlled by actuation of a reverse switch and is comprised of a three input AND-gate at the "open" output of the logic means and with inputs from said logic means and from said reverse switch and from an ignition switch controlling the operation of a vehicle prime mover, and wherein a normally open switch is closed by each door of a vehicle and is a series circuit to a power supply energizing the electronic lock system.

Claim 21

Dependent Claim 58 words

The electronic lock system as set forth in claim 1, wherein the reversible drive motor is seated by spring means to be unseated by a screw drive into the deadbolt when obstructed in the forward mode to "close", there being an actuator shifted thereby to actuate the "close" limit switch to stop the forward mode of motor operation.

Claim 22

Dependent Claim 79 words

The electronic lock system as set forth in claim 1, wherein the reversible drive motor is seated by spring means to be unseated by a screw drive into the deadbolt when obstructed in the forward mode to close, there being an actuator shifted thereby to actuate the "close" limit switch to stop the forward mode of motor operation, and to octuate a reverse switch in circuit to the "open" relay means to set the reverse mode of motor operation.

Claim 23

Dependent Claim 58 words

The electronic lock system as set forth in claim 1, wherein a mode conditioning means is comprised of a AND-gate at the "open" output of the logic means and with inputs from said logic means and from an ignition switch controlling the operation of a vehicle prime mover and disconnecting the logic means when in an "ON" position.

Claim 24

Dependent Claim 31 words

The electronic lock system as set forth in claim 1, wherein an ignition switch controlling the operation of a vehicle prime mover disconnects the logic means when in an "ON" position.

Claim 25

Dependent Claim 75 words

The electronic lock system as set forth in claim 1, wherein an ignition switch controlling the operation of a vehicle prime mover energizes a relay when in an "ON" position to disconnect the logic means, and wherein a mode conditioning means is comprised of a AND-gate at the "open" output of the logic means and with inputs from said logic means and from said relay ensure an "open" mode when the ignition switch is "ON".

Claim 26

Dependent Claim 37 words

The electronic lock system as set forth in claim 1, wherein a normally open switch is closed by each door of a vehicle and in a series circuit to a power supply energizing the electronic lock system.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1989-02-03	1989-08-05	1990-02-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1993-02-03	1993-08-05	1994-02-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1997-02-03	1997-08-05	1998-02-04	$7700.00	Window Closed / Lapsed

Electronic code controlled deadbolt

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