Patent US4222536A successfully refreshed from Google Patents.
US4222536A
Expired / Lapsed
US
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Device for sensing and indicating the end of a tape in a tape recorder
Assignee: Olympus Corp
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Filing: 1978-09-19
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Granted: 1980-09-16
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Expires: 1998-09-19
Abstract
Abstract In the device disclosed, a rotatable tape end sensing lever is connected to a tape supply shaft at one end and an operational switch at the other end. In normal operation, a fly-wheel having an annular projection runs clear of the operational switch. At the end of the tape, the tension turns the lever which shifts the switch toward the annular projection. A break in the annular projection causes the switch to close and latches it. In one embodiment, a groove over a given angle of the rotating annular projection momentarily receives the switch and then moves into a position in which the switch is closed and an alarm signal is generated.
Inventors
- 👤 Minoru Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:22
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/05; G11B15/093
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
A device for sensing the end of a tape in a tape recorder having a tape supply shaft comprising: a rotatable tape end sensing lever connected to the tape supply shaft at one end and having an operational swtich at the other end, a flywheel having an annular projection touchable by the operational switch when the sensing lever is rotated, said annular projection forming a recess with a predetermined inclined angle at an inner portion of the projection of the flywheel for receiving the switch, the sensing lever being constructed so that when the lever is rotated, the operation switch is moved into the recess and an end sensing and indicating signal is generated at a predetermined position.
Claim 2
Independent Claim
118 words
A device for sensing the end of a tape in a tape recorder having a tape supply shaft comprising: a rotatable tape end sensing lever connected to the tape supply shaft at one end and having an operational swtich at the other end, a flywheel having an annular projection touchable by the operational switch when the sensing lever is rotated, said annular projection forming a recess with a predetermined inclined angle at an inner portion of the projection of the flywheel for receiving the switch, the sensing lever being constructed so that when the lever is rotated, the operation switch is moved into the recess and an end sensing and indicating signal is generated at a predetermined position.
Claim 3
Dependent Claim
152 words
A tape recorder with a device fore sensing the end of a tape, comprising: a tape reel shaft for holding a tape, a lever connected to the tape reel shaft for movement in response to a change in tension at the end of a tape, a flywheel, a switch coupled to one end of the lever and having one portion positioned in the vicinity of the flywheel when the lever is free of the tension of the tape, said flywheel defining a circular path and having a discontinuity over a given segment of the path, said portion of the switch being located in the vicinity of said path and being movable into the path when the lever on said shaft responds to tension corresponding to the end of a tape, said discontinuity defining a surface with an angle for shifting the portion to a position on the flywheel which closes the switch.
Claim 4
Dependent Claim
152 words
A tape recorder with a device fore sensing the end of a tape, comprising: a tape reel shaft for holding a tape, a lever connected to the tape reel shaft for movement in response to a change in tension at the end of a tape, a flywheel, a switch coupled to one end of the lever and having one portion positioned in the vicinity of the flywheel when the lever is free of the tension of the tape, said flywheel defining a circular path and having a discontinuity over a given segment of the path, said portion of the switch being located in the vicinity of said path and being movable into the path when the lever on said shaft responds to tension corresponding to the end of a tape, said discontinuity defining a surface with an angle for shifting the portion to a position on the flywheel which closes the switch.
Claim 5
Dependent Claim
16 words
A device as in claim 2, wherein said discontinuity is in the form of a recess.
Claim 6
Dependent Claim
60 words
A device as in claim 2, wherein said flywheel includes an annular projection having an inner periphery and an outer periphery, said portion being located adjacent the inner periphery and movable on said lever toward the inner periphery, said discontinuity being located at the inner periphery, said discontinuity, when encountering said portion, shifting the portion and thereby closing the switch.
Claim 7
Dependent Claim
35 words
A device as in claim 4, wherein said switch includes a first portion movable by the annular projection and the discontinuity therein and a second portion fixed relative to a plane of the annular projection.
Claim 8
Dependent Claim
47 words
A device as in claim 2, further comprising a manual control switch, said manual control switch having a member for maintaining said lever in the position in which the portion is out of said path when the manual control switch maintains the recorder in a stop position.
Claim 9
Independent Claim
136 words
A device for indicating a tape end of a tape recorder having a tape supply shaft, comprising: a rotatable tape end sensing lever having two ends connected to the tape supply shaft at one end and having an operational switch at the other end, said switch having a slidable member, a flywheel having an annular projection touchable to the slidable member of the operational switch, and an end sensing and signal generating part cut in an inner peripheral portion of the projection of the flywheel and having a surface inclined to the axial direction of the flywheel so that when the sensing lever is rotated, the slidable member of the operation switch is moved into the sensing signal generating part and an end sensing and informing signal is generated by the action of the operational switch.
Claim 10
Independent Claim
136 words
A device for indicating a tape end of a tape recorder having a tape supply shaft, comprising: a rotatable tape end sensing lever having two ends connected to the tape supply shaft at one end and having an operational switch at the other end, said switch having a slidable member, a flywheel having an annular projection touchable to the slidable member of the operational switch, and an end sensing and signal generating part cut in an inner peripheral portion of the projection of the flywheel and having a surface inclined to the axial direction of the flywheel so that when the sensing lever is rotated, the slidable member of the operation switch is moved into the sensing signal generating part and an end sensing and informing signal is generated by the action of the operational switch.
Claim 11
Dependent Claim
29 words
A device as in claim 1, wherein the operational switch has a pair of leaf members, and the switch is closed by movement of one of the leaf members.
References Cited (Backward Citations)
US3971528A
Cited
US4123015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |