Patent US3742299A successfully refreshed from Google Patents.
US3742299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed detector
Assignee: International Standard Electric Corp
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Filing: 1972-09-13
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Granted: 1973-06-26
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Expires: 1992-09-13
Abstract
Abstract A device for producing a signal when, for example, a rotating body reaches a predetermined velocity. For example, a telegraphic printer will print with an unwanted orientation or in an undesired way if printing is permitted during start up of the mechanism. The device disclosed herein may thus be employed to inhibit printing until the mechanism gets up to speed.
Inventors
- 👤 A Gane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:12
CPC Classifications
H; H04; H04L; H04L17/00; H04L17/16; B; B41; B41J; B41J29/00; B41J29/38
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
204 words
A control system comprising: a member movable in a predetermined direction; means fixed adjacent said member to produce output pulses at a pulse repetition frequency (PRF) directly proportional to the velocity of said member; a first flip-flop connected from said means in a manner to change states each time said means produces one of said output pulses thereof, said first flip-flop having A and B sides; a burst oscillator; a pulse counter; a second flip-flop having A and B sides; a first AND gate; and a second AND gate, said first AND gate being connected from said first flip-flop A side and from said oscillator to the input of said counter, the B side of said first flip-flop being connected to said counter to reset the same, said second AND gate being connected from the output of said counter and from the B side of said first flip-flop to the B side of said second flip-flop, the output of said counter being connected to the input of the A side of said second flip-flop, the two levels of output of the A side of said second flip-flop being respectively representative of whether the speed of said member is above or below a predetermined speed.
Claim 2
Dependent Claim
204 words
A control system comprising: a member movable in a predetermined direction; means fixed adjacent said member to produce output pulses at a pulse repetition frequency (PRF) directly proportional to the velocity of said member; a first flip-flop connected from said means in a manner to change states each time said means produces one of said output pulses thereof, said first flip-flop having A and B sides; a burst oscillator; a pulse counter; a second flip-flop having A and B sides; a first AND gate; and a second AND gate, said first AND gate being connected from said first flip-flop A side and from said oscillator to the input of said counter, the B side of said first flip-flop being connected to said counter to reset the same, said second AND gate being connected from the output of said counter and from the B side of said first flip-flop to the B side of said second flip-flop, the output of said counter being connected to the input of the A side of said second flip-flop, the two levels of output of the A side of said second flip-flop being respectively representative of whether the speed of said member is above or below a predetermined speed.
Claim 3
Dependent Claim
22 words
The invention as defined in claim 1, wherein said member is a rotatable toothed ferromagnetic wheel, said means including a ferromagnetic pick-up.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |