US3597531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bidirectional signal seeking remote control system
Assignee: GTE Sylvania Inc
•
Filing: 1970-01-19
•
Granted: 1971-08-03
•
Expires: 1990-01-19
Abstract
Abstract A single frequency remote control system employing long and short pulses to effect bidirectional rotation of a motor driving a signal seeking UHF television tuner. The system includes an ultrasonic tone transmitter, a receiving transducer, and a signal detector for producing a pulse of duration corresponding to that of the transmitted and received tone. A time delay circuit is coupled to the detector output for actuating a direction control relay in response to a pulse of predetermined duration. Termination of the detector output pulse actuates a second relay to energize the motor windings and thereby cause rotation of the tuner drive shaft in the direction selected by pulse duration. This search mode is sustained by a logic circuit until the presence of both a sync signal and picture carrier indicate a new station has been tuned in. A memory circuit charged during the detector output pulse is operative upon pulse termination to assure the original station is vacated at the start of search.
Inventors
- 👤 Joseph Vincent De Marinis
- 👤 Paul Eshelman Le Fevre
- 👤 Joseph Edward Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:08
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18; H03J7/30; H03J7/305
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
92 words
A control system for a bidirectional motor comprising, in combination, means for generating a pulse of selected duration, a first switching means coupled to said motor for selecting the direction of motor rotation, means for actuating said first switching means in response to a pulse of predetermined duration from said pulse generating means, a source of voltage, a second switching means for selectively connecting and disconnecting said voltage source to said motor, and means for actuating said second switching means in response to termination of a pulse from said pulse generating means.
Claim 2
Dependent Claim
92 words
A control system for a bidirectional motor comprising, in combination, means for generating a pulse of selected duration, a first switching means coupled to said motor for selecting the direction of motor rotation, means for actuating said first switching means in response to a pulse of predetermined duration from said pulse generating means, a source of voltage, a second switching means for selectively connecting and disconnecting said voltage source to said motor, and means for actuating said second switching means in response to termination of a pulse from said pulse generating means.
Claim 3
Dependent Claim
64 words
A control system in accordance with claim 1 wherein said pulse generating means comprises means for generating a control signal of predetermined frequency for a selected duration, a signal detector coupled to said control signal generating means, and means coupling the output of said detector to said means for actuating said first switching means and to said means for actuating said second switching means.
Claim 4
Dependent Claim
83 words
A control system in accordance with claim 1 wherein said means for actuating said first switching means comprises a time delay circuit having an input coupled to said pulse generating means and an output coupled to said first switching means, and wherein said means for actuating said second switching means comprises a memory circuit which is charged during pulse generation, said memory circuit having a charge path coupled to said pulse generating means and a discharge path coupled to said second switching means.
Claim 5
Dependent Claim
28 words
A control system in accordance with claim 1 wherein each of said first and second switching means comprises a relay having contacts in circuit with said voltage soUrce.
Claim 6
Dependent Claim
138 words
A control system in accordance with claim 1 wherein said control system is a signal seeking system for a radio frequency receiver having bidirectional tuning means, said motor is coupled to drive said bidirectional tuning means, and said means for actuating said second switching means is operative upon termination of a pulse from said pulse generating means to cause said second switching means to connect said voltage source to said motor, thereby activating said motor to drive said tuning means away from a first station to initiate search for a second station, and further including signal presence detection means coupled between said receiver and said second switching means and operative upon the vacating of said first station to maintain the connection of said voltage source to said motor until said second station is acquired by said tuning means.
Claim 7
Dependent Claim
122 words
A signal seeking system in accordance with claim 5 wherein said receiver is a television receiver, and said signal presence detection means comprises a logic circuit having two inputs and an output, means coupled to the first input of said logic circuit for detecting the reception of synchronizing pulses by said television receiver, means coupled to the second input of said logic circuit for detecting the reception of a picture carrier by said television receiver, and means coupling the output of said logic circuit to said second switching means, said logic circuit being operative to cause said second switching means to maintain connection of said voltage to said motor in the absence of simultaneous detection of synchronizing pulses and a picture carrier.
Claim 8
Dependent Claim
76 words
A signal seeking system in accordance with claim 5 wherein said pulse generating means comprises a transmitter for radiating an ultrasonic control signal of predetermined frequency for a selected duration, a receiving transducer for converting said ultrasonic signal to an electrical signal, a signal detector coupled to said transducer, and means coupling the output of said detector to said means for actuating said first switching means and to said means for actuating said second switching means.
Claim 9
Dependent Claim
59 words
A signal seeking system in accordance with claim 5 further including means coupled between said first and second switching means for holding said first switching means in the actuated state, if actuated in response to a pulse of sufficient duration, during the period said second switching means is in the actuated state connecting said voltage source to said motor.
Claim 10
Dependent Claim
88 words
A signal seeking system in accordance with claim 8 wherein said means for actuating said first switching means comprises a time delay circuit having an input coupled to said pulse generating means, said motor has clockwise and counterclockwise drive terminals, and said first switching means comprises a first relay having a coil coupled to the output of said time delay circuit, first and second contacts respectively connected to the clockwise and counterclockwise terminals of said motor, and a common terminal coupled via circuit means to said voltage source.
Claim 11
Dependent Claim
30 words
A signal seeking system in accordance with claim 9 further including means for resetting said time delay circuit in response to termination of a pulse from said pulse generating means.
Claim 12
Dependent Claim
95 words
A signal seeking system in accordance with claim 9 wherein said means for actuating said first switching means comprises a memory circuit which is charged during pulse generation, said memory circuit having a charge path coupled to said pulse generating means and a discharge path coupled to said second switching means, and wherein said second switching means comprises a second relay having a contact and common terminal in circuit with said voltage source and a coil coupled to both the discharge path of said memory circuit and the output of said signal presence detection means.
Claim 13
Dependent Claim
148 words
A signal seeking system in accordance with claim 11 further including a third relay having a coil coupled to said pulse generating means, a first contact coupled to said cOntact of said second relay, a second contact coupled by means including a first rectifier to the input of said time delay circuit, and a common terminal connected to said source of voltage, and wherein said circuit means coupling the common terminal of said first relay to said voltage source comprises said second, and third relays, the common terminals of said first and second relays being interconnected, and said means coupled between said first and second switching means for holding said first switching means in the actuated state comprises circuit means including a rectifier connected between the common terminal of said second relay and the junction of said first relay coil and the output of said time delay circuit.
Claim 14
Dependent Claim
119 words
A signal seeking system for a radio frequency receiver having bidirectional tuning means comprising, in combination, means for generating a pulse of selected duration, means for reversing the quiescent direction setting of said tuning means in response to a pulse of predetermined duration from said pulse generating means, means for applying voltage to said tuning means in response to termination of a pulse from said pulse generating means to cause said tuning means to vacate a first station and initiate search for a second station, and signal presence detection means coupled to said receiver and operative upon the vacating of said first station to maintain the application of voltage to said tuning means until said second station is acquired.
Claim 15
Dependent Claim
119 words
A signal seeking system for a radio frequency receiver having bidirectional tuning means comprising, in combination, means for generating a pulse of selected duration, means for reversing the quiescent direction setting of said tuning means in response to a pulse of predetermined duration from said pulse generating means, means for applying voltage to said tuning means in response to termination of a pulse from said pulse generating means to cause said tuning means to vacate a first station and initiate search for a second station, and signal presence detection means coupled to said receiver and operative upon the vacating of said first station to maintain the application of voltage to said tuning means until said second station is acquired.
Claim 16
Dependent Claim
56 words
A signal seeking system in accordance with claim 13 wherein said pulse generating means comprises means for generating a control signal of predetermined frequency for a selected duration, a signal detector coupled to said control signal generating means, and means coupling the output of said detector to said direction reversing means and said voltage applying means.
Claim 17
Dependent Claim
117 words
A signal seeking system in accordance with claim 13 wherein said receiver is a television receiver, and said signal presence detection means comprises a logic circuit having two inputs and an output, means coupled to the first input of said logic circuit for detecting the reception of synchronizing pulses by said television receiver, means coupled to the second input of said logic circuit for detecting the reception of a picture carrier by said television receiver, and means coupling the output of said logic circuit to said voltage applying means, said logic circuit being operative to maintain the application of voltage to said tuning means in the absence of simultaneous detection of synchronizing pulses and a picture carrier.
Claim 18
Dependent Claim
70 words
A signal seeking system in accordance with claim 13 wherein said direction reversing means comprises a first switching means coupled to said tuning means for selecting the direction of tuning, and a time delay circuit having an input coupled to said pulse generating means and an output coupled to said first switching means, said first switching means being actuated by a predetermined voltage output level from said time delay circuit.
Claim 19
Dependent Claim
132 words
A signal seeking system in accordance with claim 16 wherein said voltage applying means comprises a source of voltage, a second switching means for selectively connecting and disconnecting said voltage source to said tuning means, and a memory circuit which is charged during pulse generation, said memory circuit having a charge path coupled to said pulse generating means and a discharge path coupled to said second switching means and being operative during discharge to cause said second switching means to connect said voltage source to said tuning means, and wherein said signal presence detection means is coupled between said receiver and said second switching means and operative upon the vacating of said first station to maintain the connection of said voltage source to said tuning means until said second station is acquired.
Claim 20
Dependent Claim
55 words
A signal seeking system in accordance with claim 13 further including means coupled between said voltage applying means and said direction revErsing means for holding the reversed direction setting of said tuning means, if reversed in response to a pulse of sufficient duration, during the period that voltage is being applied to said tuning means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |