Patent US3690591A successfully refreshed from Google Patents.
US3690591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote control for recorders
Assignee: Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
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Filing: 1970-10-06
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Granted: 1972-09-12
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Expires: 1990-10-06
Abstract
Abstract A control circuit for a tape recorder employing a novel element which senses the direction of tape motion and remembers the direction of tape motion until the tape motion is reversed. The control circuit provides rapid and controlled stopping of the tape spools. Furthermore, when the end of the tape is sensed by the control circuit, the circuit stops the tape and prevents it from being restarted in the same direction to avoid the tape from running out.
Inventors
- 👤 Christian Opelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:22
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/44; G11B15/442; G11B15/02; G11B15/023; G11B15/22; G11B15/46; G11B15/48
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
307 words
A control arrangement for a recording tape comprising, first and second storage means for storing the tape, means for transferring the tape in a first direction from the first storage means to the second storage means, and for transferring the tape in a second direction from the second storage means to the first storage means and memory means for sensing the direction of said transfer and storing information as to the direction after the transfer has stopped, said memory means storing the information until a next transfer of the tape and including a switchable device having two states representing the two directions, and means for rendering said switchable device in one state in accordance with the transfer of tape in the first direction, and for rendering said device in the second state when the tape is transferred in said second direction, said switchable device comprising an electromagnetic switch having a movable contact capable of assuming one of two positions corresponding respectively to the first and second states of the device and said switch including a first friction wheel connected to be rotated in accordance with the direction of the transfer of the tape, a swinging arm pivotally mounted and capable of alternatively assuming one of two positions, a second friction wheel pivotally mounted at one end of the swinging arm and in engagement with the first friction wheel and driven thereby for moving said swinging arm into a first position when the first friction wheel rotates in one direction and to a second position when the first friction wheel rotates in the opposite direction; and an electrical switch having a movable contact mounted on said swinging arm, and a pair of fixed contacts, said movable contact making electrical contact with one or the other of said fixed contacts in accordance with the two positions of said arm.
Claim 2
Dependent Claim
307 words
A control arrangement for a recording tape comprising, first and second storage means for storing the tape, means for transferring the tape in a first direction from the first storage means to the second storage means, and for transferring the tape in a second direction from the second storage means to the first storage means and memory means for sensing the direction of said transfer and storing information as to the direction after the transfer has stopped, said memory means storing the information until a next transfer of the tape and including a switchable device having two states representing the two directions, and means for rendering said switchable device in one state in accordance with the transfer of tape in the first direction, and for rendering said device in the second state when the tape is transferred in said second direction, said switchable device comprising an electromagnetic switch having a movable contact capable of assuming one of two positions corresponding respectively to the first and second states of the device and said switch including a first friction wheel connected to be rotated in accordance with the direction of the transfer of the tape, a swinging arm pivotally mounted and capable of alternatively assuming one of two positions, a second friction wheel pivotally mounted at one end of the swinging arm and in engagement with the first friction wheel and driven thereby for moving said swinging arm into a first position when the first friction wheel rotates in one direction and to a second position when the first friction wheel rotates in the opposite direction; and an electrical switch having a movable contact mounted on said swinging arm, and a pair of fixed contacts, said movable contact making electrical contact with one or the other of said fixed contacts in accordance with the two positions of said arm.
Claim 3
Dependent Claim
175 words
A control arrangement for a recording tape comprising, first and second storage means for storing the tape, means for transferring tape in a first direction from the first storage means to the second storage means, and for transferring the tape in a second direction from the second storage means to the first storage means and memory means for sensing the direction storing information as to said direction after the transfer is stopped, said memory means storing the information until the next transfer of the tape, and said first and second storage means including first and second spools; said means for transferring includes a first motor for driving said first spool, and a second motor for driving said second spool and when transferring tape one of said motors is driving and the other is non-driving; said means for transferring further includes means for initiating stopping the transfer, and means controlled by the memory means for impressing on the non-driving motor When a stopping is initiated a command voltage for braking said motor until tape is stopped.
Claim 4
Dependent Claim
175 words
A control arrangement for a recording tape comprising, first and second storage means for storing the tape, means for transferring tape in a first direction from the first storage means to the second storage means, and for transferring the tape in a second direction from the second storage means to the first storage means and memory means for sensing the direction storing information as to said direction after the transfer is stopped, said memory means storing the information until the next transfer of the tape, and said first and second storage means including first and second spools; said means for transferring includes a first motor for driving said first spool, and a second motor for driving said second spool and when transferring tape one of said motors is driving and the other is non-driving; said means for transferring further includes means for initiating stopping the transfer, and means controlled by the memory means for impressing on the non-driving motor When a stopping is initiated a command voltage for braking said motor until tape is stopped.
Claim 5
Dependent Claim
147 words
A control arrangement for a recording tape comprising, first and second storage means for storing the tape, means for transferring tape in a first direction from the first storage means to the second storage means, and for transferring the tape in a second direction from the second storage means to the first storage means and memory means for sensing the direction of said transfer and storing information as to said direction after the transfer has stopped, said memory means storing the information until the next transfer of the tape, and end of tape means for sensing an end of the tape and for stopping the tape transfer when the end of tape is sensed; and means controlled by the memory means and said end of tape means for permitting operation of said transferring means only in a direction opposite to the direction stored in the memory means.
Claim 6
Dependent Claim
147 words
A control arrangement for a recording tape comprising, first and second storage means for storing the tape, means for transferring tape in a first direction from the first storage means to the second storage means, and for transferring the tape in a second direction from the second storage means to the first storage means and memory means for sensing the direction of said transfer and storing information as to said direction after the transfer has stopped, said memory means storing the information until the next transfer of the tape, and end of tape means for sensing an end of the tape and for stopping the tape transfer when the end of tape is sensed; and means controlled by the memory means and said end of tape means for permitting operation of said transferring means only in a direction opposite to the direction stored in the memory means.
Claim 7
Dependent Claim
57 words
A control arrangement according to claim 3, wherein said means for transferring includes first and second command control means for initiating transfer in the first and second directions respectively, and said means for permitting operation of said transfer means including means for blocking operation of said last operating control means when said end of tape is sensed.
Claim 8
Dependent Claim
27 words
A control arrangement according to claim 4, wherein said first and second command control means includes means for blocking operation of the other control means when operating.
Claim 9
Dependent Claim
154 words
In a control arrangement for a tape transport, a memory for sensing and recording the direction of the tape movements until it is reversed, comprising a first friction wheel connected to rotate in accordance with the direction of the transfer of the tape; a swinging arm pivotally mounted and capable of alternatively assuming one of two positions; a second friction wheel pivotally mounted at one end of the swinging arm and engaging said first friction wheel and driven thereby, for moving said swinging arm into a first position when the first friction wheel rotates in one direction and to a second position when the first friction wheel rotates in the opposite direction; and an electrical switch having a movable contact mounted on said swinging arm, and a pair of fixed contacts, said movable contact making electrical contact with one or the other of said fixed contacts in accordance with the position of said arm.
Claim 10
Dependent Claim
154 words
In a control arrangement for a tape transport, a memory for sensing and recording the direction of the tape movements until it is reversed, comprising a first friction wheel connected to rotate in accordance with the direction of the transfer of the tape; a swinging arm pivotally mounted and capable of alternatively assuming one of two positions; a second friction wheel pivotally mounted at one end of the swinging arm and engaging said first friction wheel and driven thereby, for moving said swinging arm into a first position when the first friction wheel rotates in one direction and to a second position when the first friction wheel rotates in the opposite direction; and an electrical switch having a movable contact mounted on said swinging arm, and a pair of fixed contacts, said movable contact making electrical contact with one or the other of said fixed contacts in accordance with the position of said arm.
Claim 11
Dependent Claim
290 words
A control arrangement for a magnetic tape recorder comprising, supply and takeup reels for magnetic tape, drive means operatively connected to said supply and takeup reels and having fast winding and rewinding modes of operation for fast winding the tape in a first direction from the supply reel to the takeup reel and for fast rewinding the tape in a second direction from the takeup reel to the supply reel, means for selectively controlling the mode of operation of said drive means including switching means for causing said drive means to operate in its fast rewind mode when the recorder is to be stopped as the tape is driven in a forward direction and in its fast forward mode when the recorder is to be stopped as the tape is driven in a rewind direction, memory means for controlling said switching means and for storing information representative of the direction of travel of said tape, said switching means being responsive to the information stored in said memory to cause said drive means to operate in its fast rewind mode when the recorder is to be stopped as the tape is driven in a first direction thereby to brake tape movement in said first direction and to cause the drive means to operate in its fast forward mode when the recorder is to be stopped as the tape is driven in a rewind direction, thereby to brake tape movement in said second direction, sensing means for determining a reversal in direction of motion of the tape as the recorder is stopped, and means responsive to said sensing means and the change of direction sensed thereby to stop said drive means, whereby said tApe is braked and brought to a complete stop.
Claim 12
Dependent Claim
290 words
A control arrangement for a magnetic tape recorder comprising, supply and takeup reels for magnetic tape, drive means operatively connected to said supply and takeup reels and having fast winding and rewinding modes of operation for fast winding the tape in a first direction from the supply reel to the takeup reel and for fast rewinding the tape in a second direction from the takeup reel to the supply reel, means for selectively controlling the mode of operation of said drive means including switching means for causing said drive means to operate in its fast rewind mode when the recorder is to be stopped as the tape is driven in a forward direction and in its fast forward mode when the recorder is to be stopped as the tape is driven in a rewind direction, memory means for controlling said switching means and for storing information representative of the direction of travel of said tape, said switching means being responsive to the information stored in said memory to cause said drive means to operate in its fast rewind mode when the recorder is to be stopped as the tape is driven in a first direction thereby to brake tape movement in said first direction and to cause the drive means to operate in its fast forward mode when the recorder is to be stopped as the tape is driven in a rewind direction, thereby to brake tape movement in said second direction, sensing means for determining a reversal in direction of motion of the tape as the recorder is stopped, and means responsive to said sensing means and the change of direction sensed thereby to stop said drive means, whereby said tApe is braked and brought to a complete stop.
Claim 13
Dependent Claim
148 words
A control arrangement according to claim 7 wherein the memory means includes a switchable device comprising a first friction wheel connected to rotate in accordance with the direction of motion of the tape, a swinging arm pivotally mounted and capable of alternatively assuming one of two positions, a second friction wheel pivotally mounted at one end of the swinging arm and in engagement with said first friction wheel and driven thereby and for moving said swinging arm into a first position when the first friction wheel rotates in one direction and to a second position when the first friction wheel rotates in the opposite direction; and an electrical switch having a movable contact mounted on said swinging arm, and a pair of fixed contacts, said movable contact making electrical contact with one or the other of said fixed contacts in accordance with the two positions of said arm.
Claim 14
Dependent Claim
150 words
A control arrangement according to claim 7 wherein the sensing means includes a switchable device comprising a first friction wheel connected to rotate in accordance with the direction of motion of the tape, a swinging arm pivotally mounted and capable of alternately assuming one of two positions, a second friction wheel pivotally mounted at one end of said swinging arm and in engagement with said first friction wheel and driven thereby for moving said swinging arm into a first position when the first friction wheel rotates in one direction and to a second position when the first friction wheel rotates in an opposite direction and an electrical switch having a movable contact mounted on said swinging arm and at least one fixed contact, said movable contact being in short electrical connection with said fixed contact each time said swinging arm moves from one to the other of said two positions.
Claim 15
Dependent Claim
80 words
A control arrangement according to claim 7 wherein said memory means includes two bystable multivibrators, one of said multivibrators being related to and set together with the activation of the drive means, the other of said multivibrators being related to and set together with activation of the fast rewinding mode of the drive means, and both of said multivibrators being responsive to said sensing means and reset only after an indication of a tape transfer reversal by said sensing means.
Claim 16
Dependent Claim
66 words
A control arrangement according to claim 7 further comprising means for sensing an end of the tape and for stopping movement of the tape when the end of the tape is sensed; and means controlled by the memory means and said end of tape sensing means for permitting operation of said drive means only in a direction opposite to the direction stored in the memory means.
References Cited (Backward Citations)
US2778634A
Cited
US3141626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |