US3771114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accoustical tape loop sensor
Assignee: CENTURY DATA SYSTEMS Inc
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Filing: 1971-11-11
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Granted: 1973-11-06
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Expires: 1991-11-11
Abstract
Abstract A pulsed ultrasonic ranging system may be used to sense the position and velocity of tape in a vacuum buffer column. The received pulses may be stored in an accumulator to provide position information whereas the value of successive accumulations can be used to indicate velocity. A single piezoelectric transducer can be used as both transmitter and receiver.
Inventors
- 👤 W Buchan
- 👤 J Ring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:43
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/50; G01S15/58; G01S15/582; B; B65; B65H; B65H23/00; B65H23/04; B65H23/042; B65H2553/00; B65H2553/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
A system for supervising tape in a buffer column comprising: means for transmitting an acoustical signal within a tape buffer column; means for sensing an echo signal reflected from the tape in the buffer column; means for measuring the time between the transmitted signal and the echo signal whereby the position of the tape may be determined, said time measuring means comprising: a flip flop; means for setting said flip flop to a first state at the time a signal is transmitted; and means for setting said flip flop to its opposite state at the time a signal is received, whereby the average value of the output of said flip flop is a representation of the time between transmitted and received signals, and wherein is a, means for measuring the velocity of the tape in the column, said velocity measuring means comprising: detection means responsive to alternate echo signals; a one shot multivibrator responsively connected to said detection means, said one shot having a period equal to the time between transmit signals; means for detecting the phase difference between the time at which said one shot returns to its stable state and the time at which an echo signal is received.
Claim 2
Independent Claim
201 words
A system for supervising tape in a buffer column comprising: means for transmitting an acoustical signal within a tape buffer column; means for sensing an echo signal reflected from the tape in the buffer column; means for measuring the time between the transmitted signal and the echo signal whereby the position of the tape may be determined, said time measuring means comprising: a flip flop; means for setting said flip flop to a first state at the time a signal is transmitted; and means for setting said flip flop to its opposite state at the time a signal is received, whereby the average value of the output of said flip flop is a representation of the time between transmitted and received signals, and wherein is a, means for measuring the velocity of the tape in the column, said velocity measuring means comprising: detection means responsive to alternate echo signals; a one shot multivibrator responsively connected to said detection means, said one shot having a period equal to the time between transmit signals; means for detecting the phase difference between the time at which said one shot returns to its stable state and the time at which an echo signal is received.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |