Patent US3729149A successfully refreshed from Google Patents.
US3729149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape transport
Assignee: WIJNGAERT L VAN DE
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Filing: 1970-02-18
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Granted: 1973-04-24
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Expires: 1990-02-18
Abstract
Abstract A magnetic recording and playback device having a tape-shaped record carrier particularly for use in computer memory systems having tape-bins and a sensing member for signalling the presence of a tape-loop in said tape-bins. The spool motor on the windingon side being controlled by the weight of the tape in the associated tape-bin, and the spool motor on the winding-off side being controlled by the presence or absence of the last tape-loop in the associated tape-bin.
Inventors
- 👤 De Wijngaert L Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:59
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
291 words
A device for driving tape-shaped record carriers comprising first and second tape carrying spools for winding therebetween said record carriers, said tape being wound onto said first spool and off said second spool and conversely, spool driving means connected to said first and second spools, braking means associated with each of said spool driving means, said braking means being actuated when its associated spool driving means is deactivated, a first and second main capstan and first and second auxiliary capstans mounted between said spools in engagement with said tape for driving same, a driving mechanism connected to said main capstans for driving same in relative opposite directions, means for driving said auxiliary capstans in relative opposite directions, first and second tape-bins mounted between respective main and auxiliary capstans for receiving and storing therein loops of said tape shaped record carrier, a weighing member attached to each of said tape-bins for weighing each said tapebin with the tape contained therein, a switching member connected to each of said weighing members for producing a first signal when the tape stock stored in the respective tape bin exceeds a given value and a second signal when the tape stock drops beLow said value, means connected to said switching members responsive to said first and second signals for operating said spool driving means and said braking means so as to cause tape to be supplied or taken up from the respective bin, a sensing member associated with each of said tape-bins for indicating upon actuation thereof the presence of a single loop of tape within the respective bin and means connected to each of said sensing members for causing actuation of the respective spool driving means in a direction to supply tape to said bin.
Claim 2
Independent Claim
291 words
A device for driving tape-shaped record carriers comprising first and second tape carrying spools for winding therebetween said record carriers, said tape being wound onto said first spool and off said second spool and conversely, spool driving means connected to said first and second spools, braking means associated with each of said spool driving means, said braking means being actuated when its associated spool driving means is deactivated, a first and second main capstan and first and second auxiliary capstans mounted between said spools in engagement with said tape for driving same, a driving mechanism connected to said main capstans for driving same in relative opposite directions, means for driving said auxiliary capstans in relative opposite directions, first and second tape-bins mounted between respective main and auxiliary capstans for receiving and storing therein loops of said tape shaped record carrier, a weighing member attached to each of said tape-bins for weighing each said tapebin with the tape contained therein, a switching member connected to each of said weighing members for producing a first signal when the tape stock stored in the respective tape bin exceeds a given value and a second signal when the tape stock drops beLow said value, means connected to said switching members responsive to said first and second signals for operating said spool driving means and said braking means so as to cause tape to be supplied or taken up from the respective bin, a sensing member associated with each of said tape-bins for indicating upon actuation thereof the presence of a single loop of tape within the respective bin and means connected to each of said sensing members for causing actuation of the respective spool driving means in a direction to supply tape to said bin.
Claim 3
Dependent Claim
21 words
The device according to claim 1 wherein said spool driving means is a monophase a-synchronous motor having a solid iron armature.
Claim 4
Dependent Claim
15 words
The device according to claim 1 wherein said spool driving means are excess voltage motors.
Claim 5
Dependent Claim
220 words
The device according to claim 1 wherein said means connected to said switching members comprises first and second switches respectively, said switching members being connected to an input of said first and second switches, an OR-circuit connected at one of its inputs to the output of each of said switches, each of said sensing members associated with said respective tape-bins being connected to another input of its respective OR-circuit, a control member for controlling the operation of each of said braking means connected to the output of each of said OR-circuits, changeover switches connected between the output of each respective OR-circuit and each respective spool driving means, a third switch coupled to both of said changeover switches for controlling the operation of either the first or the second main capstan so that either one or the other is operative, said first and second switches being switched on when the first or the second main capstan respectively is switched on, said changeover switches being connected to the output of said OR-circuit for controlling the direction of rotation of each of said spool driving means, whereby when said first signal is produced by a switching member and when said sensing means is actuated said spool driving means associated therewith will be switched on and the associated braking means will be switched off.
Claim 6
Dependent Claim
305 words
The device according to claim 1 wherein said means connected to said switching members comprises a memory connected at a first input thereof to each of said switching members, a first changeover switch connected to a second input of both memories, said first changeover switch connected at its other side to a voltage source so as to provide voltage to one of said memories, a switch coupled to said first changeover switch for operating said first or second main capstans when said first changeover switch is connecting said voltage source to the respective memory, an OR-circuit connected at a first input thereof to the output of each of said memories, each of said sensing members being connected to a second input of a respective OR-circuit, each of said braking means being connected to an output of its respective OR-circuit, a second and third changeover switch connected to the output of its respective OR-circuit for controlling the direction of rotation of each of said spool driving means, said second and third changeover switches also being connected to an output of its respective memory, the memories providing at the output a first signal, when the signal of the voltage source at the second input and the first signal of the associated switching member is at the first input, said first signal at the output of the memories switching off the brake and causing the associated spool motor to operate in a direction so as to cause tape winding on its respective spool and to continue operating until the first signal of the switching member disappears and the signal of the associated sensing member in the absence of a tape-loop of predetermined length switches off the brake and causes the associated spool motor to operate in a direction to cause unwinding of the tape from its respective spool.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |