US4013991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fish locator
Assignee: Cetec Corp
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Filing: 1976-02-13
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Granted: 1977-03-22
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Expires: 1996-02-13
Abstract
Abstract An ultrasonic depth indicator having an ultrasonic transducer suitable for mounting on a boat, transmitter, receiver and rotating indicator, with transmitted echoes producing receiver output pulses for energizing the indicator, with the angular distance between indicator pulses providing a measure of depth of the item producing the echo. A synchronization signal source for operating the transmitter in synchronism with indicator rotation. A logic circuit, typically a bistable flip-flop, having the transmitter trigger signal as an input and producing an inhibit signal as an output for inhibiting transmitter and receiver operation during predetermined revolutions of the indicator.
Inventors
- 👤 Orville R. Balcom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:47
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/56; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
In an ultrasonic depth indicator for locating fish and the like, the combination of: an ultrasonic transducer; a transmitter for providing an electrical input to said transducer; a receiver for the electrical output of said transducer; an indicator; drive means for rotating said indicator; means for connecting said receiver output to said indicator for pulsing said indicator as a function of receiver outputs; synchronization means for generating a transmitter trigger signal in synchronism with indicator rotation providing a trigger signal for every revolution; a logic circuit having said trigger signal as an input and producing an inhibit signal as an output for predetermined input signals; and means for connecting said inhibit signal to said transmitter and receiver for inhibiting operation thereof.
Claim 2
Dependent Claim
121 words
In an ultrasonic depth indicator for locating fish and the like, the combination of: an ultrasonic transducer; a transmitter for providing an electrical input to said transducer; a receiver for the electrical output of said transducer; an indicator; drive means for rotating said indicator; means for connecting said receiver output to said indicator for pulsing said indicator as a function of receiver outputs; synchronization means for generating a transmitter trigger signal in synchronism with indicator rotation providing a trigger signal for every revolution; a logic circuit having said trigger signal as an input and producing an inhibit signal as an output for predetermined input signals; and means for connecting said inhibit signal to said transmitter and receiver for inhibiting operation thereof.
Claim 3
Dependent Claim
35 words
An ultrasonic depth indicator as defined in claim 1 wherein said inhibit signal connecting means includes a switch for selectively connecting and disconnecting said inhibit signal permitting operation at partial rate and full rate, respectively.
Claim 4
Dependent Claim
26 words
An ultrasonic depth indicator as defined in claim 1 wherein said logic circuit includes a bistable circuit providing an inhibit signal for every other trigger signal.
References Cited (Backward Citations)
US3267413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |