US3724352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for a cassette and adapter assembly for cameras
Assignee: Nikon Corp
•
Filing: 1971-06-07
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Granted: 1973-04-03
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Expires: 1991-06-07
Abstract
Abstract A safety device in a cassette and adapter assembly for cameras which prevents the removal of the cassette from the adapter as well as the removal of the adapter from the camera body after a draw cover protecting the photosensitive material in the cassette is withdrawn from the cassette. The safety device prevents the cassette from being mounted in the adapter unless the draw cover of the cassette is in position. Additionally, the shutter button of the camera cannot be actuated when the cassette is installed unless the draw cover has been removed. The adapter can be mounted on the camera body when the cassette is not loaded in the adapter.
Inventors
- 👤 J Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:03
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18; G03B17/00; G03B17/28; G03B17/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
166 words
A cassette and cassette adapter for mounting on a camera comprising, in combination, retaining means on the cassette adapter and the camera for coupling and uncoupling the cassette adapter to the camera, blocking means operatively associated with the retaining means to block operation of the retaining means, a wall forming the cassette having an exposure opening therein, a draw cover positioned with respect to the cassette to open and close the exposure opening of the cassette, means provided by the cassette adapter for positioning the cassette in the adapter, detection and signalling means connected to the cassette adapter responsive to the position of the draw cover with respect to the cassette and to the position of the cassette in the cassette adapter, the detection and signalling means operatively associated with the blocking means to prevent coupling and uncoupling of the cassette adapter from the camera when the exposure opening on the cassette is open and when the cassette is not properly positioned in the cassette adapter.
Claim 2
Dependent Claim
166 words
A cassette and cassette adapter for mounting on a camera comprising, in combination, retaining means on the cassette adapter and the camera for coupling and uncoupling the cassette adapter to the camera, blocking means operatively associated with the retaining means to block operation of the retaining means, a wall forming the cassette having an exposure opening therein, a draw cover positioned with respect to the cassette to open and close the exposure opening of the cassette, means provided by the cassette adapter for positioning the cassette in the adapter, detection and signalling means connected to the cassette adapter responsive to the position of the draw cover with respect to the cassette and to the position of the cassette in the cassette adapter, the detection and signalling means operatively associated with the blocking means to prevent coupling and uncoupling of the cassette adapter from the camera when the exposure opening on the cassette is open and when the cassette is not properly positioned in the cassette adapter.
Claim 3
Dependent Claim
77 words
A cassette and cassette adapter for mounting on a camera according to claim 1, further comprising cassette signalling means in the cassette operative to actuate the detection and signalling means in response to the position of the draw cover, and the cassette signalling means coacting with the means for positioning the cassette in The cassette adapter to prevent the positioning and removal of the cassette in the adapter when the exposure opening of the cassette is open.
Claim 4
Dependent Claim
65 words
A cassette and cassette adapter for mounting on a camera according to claim 2, further comprising a shutter button on the camera, and shutter signalling means provided by the cassette adapter coacting with the cassette signalling means to prevent actuation of the shutter button when the cassette and the cassette adapter are mounted on the camera and the exposure opening in the cassette is closed.
Claim 5
Dependent Claim
93 words
A cassette and cassette adapter for mounting on a camera according to claim 2, wherein the cassette signalling means includes a plurality of projections, the cassette wall includes an opening corresponding to each projection, and further comprising means in the cassette to position each of the projections with respect to the corresponding opening in response to the position of the draw cover so that at least one projection will extend through the corresponding opening in the cassette wall and one projection will be withdrawn within the cassette when the exposure opening is open.
Claim 6
Dependent Claim
107 words
A cassette and cassette adapter for mounting on a camera according to claim 4 wherein the means provided by the cassette adapter for positioning the cassette includes a wall having a notch therein, and at least one of the projections of the cassette signalling means extends through the opening in the cassette wall when the exposure opening is open, so that the projection will engage the notch in the wall of the cassette adapter to prevent removal of the cassette from the cassette adapter and will interfere with the wall of the cassette adapter to prevent insertion of the cassette when the cassette exposure opening is open.
Claim 7
Dependent Claim
56 words
A cassette and cassette adapter for mounting on a camera according to claim 5 wherein the detection and signalling means comprise a detection lever adapted to coact with the blocking means and the cassette wall to prevent coupling of the cassette adapter to the camera when the cassette is not properly positioned in the cassette adapter.
Claim 8
Dependent Claim
61 words
A cassette and cassette adapter for mounting on a camera according to claim 6 wherein the detection and signalling means include a signal receiving lever which coacts with the projection of the cassette signalling means and with the detection lever to prevent coupling and uncoupling of the cassette adapter and the camera when the exposure opening in the cassette is open.
Claim 9
Dependent Claim
41 words
A cassette and cassette adapter for mounting on a camera according to claim 7 wherein the signal receiving lever is pivotally mounted on the cassette adapter and the detection lever is pivotally mounted to and responsive to the signal receiving lever.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |