US3785658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassette-type magnetic tape recording and reproducing apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1971-07-15
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Granted: 1974-01-15
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Expires: 1991-07-15
Abstract
Abstract A double recording preventing means for use in a small-sized cassette tape recording and reproducing apparatus including a manual operation mode change-over lever and a hole sensing lever taking two different positions depending upon the presence and absence of a double recording preventing hole in a cassette to be recorded or reproduced, and a manual record lever for actuating a record switch through a switching lever in accordance with the position of the hole sensing lever in association with the operation of the change-over lever. On a base plate of the apparatus mounting a slidable plate carrying transducer heads and a pinch roller, the means comprises a projection in the slidable plate, a hook-like projection of the hole sensing lever, and first and second cutouts of the switching lever engageable with respectively the above-mentioned projections, the projection of the hole sensing lever being engaged with the first cutout in the presence of the double recording preventing hole to render the switching lever immovable, while in the absence of such a hole, the projection of the slidable head carrying plate being allowed to be engaged with the second cutout of the switching lever and shift the switching lever into the recording operating state of the apparatus by simultaneous actuations of the record lever and the operation mode change-over lever.
Inventors
- 👤 H Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:31
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/10; G11B15/05; G11B15/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
257 words
Double recording preventing means for a cassette type magnetic tape recording and reproducing apparatus, comprising: a base plate; a sensing lever for detecting the presence and absence of a double-recording preventing opening in cassette mounted on the tape recording and reproducing apparatus, said sensing lever having a projection formed thereon and being mounted for movement relative to said base plate; bias means for biasing said sensing lever in a first direction of motion; a movable plate carrying magnetic transducing head means, said plate being mounted for movement relative to said base plate, and having a projection formed thereon; a switching lever having first and second cutout portions formed therein; said switching lever being mounted for movement between positions of engagement with the sensing lever projection and the movable plate projection; a manually operated mode selector member coupled to said movable plate for moving said plate and the head means carried thereon between operative and inoperative positions relative to a cassette mounted on the tape recording reproducing apparatus; record switch means for placing the apparatus into a record mode when actuated; and means for moving said switching lever to a first position of engagement with said sensing lever projection and out of contact with said movable plate, and to a second position of engagement with the movable plate projection, wherein movement of said plate to said operative position in said second position of engagement causes movement of said switching lever into contAct with said record switch means to place said recording and reproducing apparatus into a record mode.
Claim 2
Dependent Claim
257 words
Double recording preventing means for a cassette type magnetic tape recording and reproducing apparatus, comprising: a base plate; a sensing lever for detecting the presence and absence of a double-recording preventing opening in cassette mounted on the tape recording and reproducing apparatus, said sensing lever having a projection formed thereon and being mounted for movement relative to said base plate; bias means for biasing said sensing lever in a first direction of motion; a movable plate carrying magnetic transducing head means, said plate being mounted for movement relative to said base plate, and having a projection formed thereon; a switching lever having first and second cutout portions formed therein; said switching lever being mounted for movement between positions of engagement with the sensing lever projection and the movable plate projection; a manually operated mode selector member coupled to said movable plate for moving said plate and the head means carried thereon between operative and inoperative positions relative to a cassette mounted on the tape recording reproducing apparatus; record switch means for placing the apparatus into a record mode when actuated; and means for moving said switching lever to a first position of engagement with said sensing lever projection and out of contact with said movable plate, and to a second position of engagement with the movable plate projection, wherein movement of said plate to said operative position in said second position of engagement causes movement of said switching lever into contAct with said record switch means to place said recording and reproducing apparatus into a record mode.
Claim 3
Dependent Claim
56 words
The device according to claim 1, in which said movable plate has an elongated slot engaged with a plate-like rod, said rod being operative along a guide slot in the base plate of the apparatus by said mode selector to slide the movable plate on the base plate to bring the apparatus into its operative state.
Claim 4
Dependent Claim
224 words
A double recording preventing device for a cassette-type magnetic tape recording and reproducing apparatus having a rotatable operation mode change-over means, a base plate, and a movable plate slidably disposed on the base plate and linearly operative by the operation of the operation mode change-over means, said movable plate carrying thereon magnetic transducer heads and a pinch roller, comprising: a projection provided at one end of the movable plate; a switching lever linked at one end with a manual record lever and having first and second cutouts at the other end thereof; a sensing lever adapted to take two different positions in accordance with the presence and absence of a double recording preventing opening in a cassette loaded into the apparatus, the sensing lever having a hook-like projection engageable with the first cutout of the switching lever in the presence of the double recording preventing opening to thereby make the switching lever immovable; the switching lever engaging at its second cutout while the projection of the movable plate by the actuation of the record lever in the absence of the double recording preventing opening, the switching lever thereafter being biased by the movement of the movable plate into its operative state, and an electric switch operative in response to the biasing of the switching lever for changing over an electric circuit for recording operation.
Claim 5
Dependent Claim
224 words
A double recording preventing device for a cassette-type magnetic tape recording and reproducing apparatus having a rotatable operation mode change-over means, a base plate, and a movable plate slidably disposed on the base plate and linearly operative by the operation of the operation mode change-over means, said movable plate carrying thereon magnetic transducer heads and a pinch roller, comprising: a projection provided at one end of the movable plate; a switching lever linked at one end with a manual record lever and having first and second cutouts at the other end thereof; a sensing lever adapted to take two different positions in accordance with the presence and absence of a double recording preventing opening in a cassette loaded into the apparatus, the sensing lever having a hook-like projection engageable with the first cutout of the switching lever in the presence of the double recording preventing opening to thereby make the switching lever immovable; the switching lever engaging at its second cutout while the projection of the movable plate by the actuation of the record lever in the absence of the double recording preventing opening, the switching lever thereafter being biased by the movement of the movable plate into its operative state, and an electric switch operative in response to the biasing of the switching lever for changing over an electric circuit for recording operation.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |