Patent US3706424A successfully refreshed from Google Patents.
US3706424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stop control for a reel to reel drive mechanism
Assignee: Audiomatic Techniques Inc
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Filing: 1970-11-25
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Granted: 1972-12-19
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Expires: 1990-11-25
Abstract
Abstract A tape transport stop control for a tape drive mechanism in which a pair of sensors sense the movement of the tape at two spaced apart positions, such as by sensing movement of the takeup reel and the supply reel, respectively. The tape drive is stopped when either sensor fails to sense tape movement. The sensors associated with tape movement periodically cause a bistable flip flop to operate between its respective stable states in response to output signals associated with tape movement. When the flip flop remains in a stable state for a predetermined time interval, the drive mechanism is stopped.
Inventors
- 👤 Eyvand E Toensing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:48
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
136 words
A stop control system for a transport device for transporting an elongated member from one reel to another reel comprising: a pair of switches, one of said switches associated with one of said reels, and the other of said switches associated with the other of said reels each switch producing a periodic signal in response to rotational movement of its associated reel,, a bistable flip-flop having two state controlling inputs each input associated with a different stable state to cause the flip-flop to change to the other stable state, said inputs being connected to said switches, said flip-flop having an output which produces a signal each time the state of the flipflop is changed, and means, connected with said output of said flip-flop for stopping said transport device when said flip-flop remains in a stable state.
Claim 2
Dependent Claim
136 words
A stop control system for a transport device for transporting an elongated member from one reel to another reel comprising: a pair of switches, one of said switches associated with one of said reels, and the other of said switches associated with the other of said reels each switch producing a periodic signal in response to rotational movement of its associated reel,, a bistable flip-flop having two state controlling inputs each input associated with a different stable state to cause the flip-flop to change to the other stable state, said inputs being connected to said switches, said flip-flop having an output which produces a signal each time the state of the flipflop is changed, and means, connected with said output of said flip-flop for stopping said transport device when said flip-flop remains in a stable state.
Claim 3
Dependent Claim
50 words
The apparatus of claim 1 and further comprising a time delay device connected between said flip flop and said means for stopping said transport device, said time delay device causing a predetermined time delay between the cessation of operation of said flip flop and the actuation of said stopping means.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 wherein said switches are magnetic reed switches responsive to magnets rotating in association with said reels.
Claim 5
Dependent Claim
191 words
A stop control for a transport device for transporting an elongated continuous member from a point of origin to a point of termination comprising: a pair of motion sensing switches, each producing an intermittent signal in response to movement of said member, one switch associated with the point of origin to sense the movement of said member therefrom, and the other switch associated with the point of termination to sense the movement of said member thereto, a flip-flop having a pair of inputs, one of said switches being connected to one input and the other switch connected to the other input, said inputs being activated by said switches to drive the flip-flop between two stable states, one stable state associated with each input respectively, means for producing a control signal, said means being responsive to the periodic reversal of said flip-flop to produce a control signal when said flip-flop remains for a predetermined period of time in one of its stable states indicating that motion of said member has ceased, and means responsive to said control signal for stopping the transport device when said signal indicates a cessation of memBer movement.
Claim 6
Dependent Claim
191 words
A stop control for a transport device for transporting an elongated continuous member from a point of origin to a point of termination comprising: a pair of motion sensing switches, each producing an intermittent signal in response to movement of said member, one switch associated with the point of origin to sense the movement of said member therefrom, and the other switch associated with the point of termination to sense the movement of said member thereto, a flip-flop having a pair of inputs, one of said switches being connected to one input and the other switch connected to the other input, said inputs being activated by said switches to drive the flip-flop between two stable states, one stable state associated with each input respectively, means for producing a control signal, said means being responsive to the periodic reversal of said flip-flop to produce a control signal when said flip-flop remains for a predetermined period of time in one of its stable states indicating that motion of said member has ceased, and means responsive to said control signal for stopping the transport device when said signal indicates a cessation of memBer movement.
References Cited (Backward Citations)
US3141625A
Cited
US3488017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |