Patent US3779642A successfully refreshed from Google Patents.
US3779642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable magnification copier machine
Assignee: Minolta Co Ltd
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Filing: 1972-07-17
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Granted: 1973-12-18
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Expires: 1992-07-17
Abstract
Abstract Device for varying the copying magnification by moving the position of the supporter member mounted with two or more lenses and adapted to be automatically returned to the position for the usual magnification when the main switch for the copier machine is turned off.
Inventors
- 👤 M Ogawa
- 👤 K Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:13
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/34; G03B27/36; G03B27/40; G03G; G03G15/00; G03G15/04; G03G15/041
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
171 words
A variable magnification copier machine comprising; an electric source for the general electric load for copying, an optical means for projecting an image of an original at any selected one of at least two magnifications inclusive of a usual magnification depending on the position thereof, an electro-motive means for moving said optical means, a main switch for establishing circuits when closed to supply electric power from said electric source to said general electric load and to said electro-motive means, a switching means arranged between said main switch and said electro-motive means manually actuatable to closed position for energizing said electromotive means, a switching means actuatable by said optical means at a selected magnification position for deenergizing said electro-motive means, and a switching means actuatable to a closed position with the opening of said main switch and said optical means being in a position other than that for said usual magnification projection so as to energize said electromotive means to move said optical mEans to the position for said usual magnification projection.
Claim 2
Dependent Claim
171 words
A variable magnification copier machine comprising; an electric source for the general electric load for copying, an optical means for projecting an image of an original at any selected one of at least two magnifications inclusive of a usual magnification depending on the position thereof, an electro-motive means for moving said optical means, a main switch for establishing circuits when closed to supply electric power from said electric source to said general electric load and to said electro-motive means, a switching means arranged between said main switch and said electro-motive means manually actuatable to closed position for energizing said electromotive means, a switching means actuatable by said optical means at a selected magnification position for deenergizing said electro-motive means, and a switching means actuatable to a closed position with the opening of said main switch and said optical means being in a position other than that for said usual magnification projection so as to energize said electromotive means to move said optical mEans to the position for said usual magnification projection.
Claim 3
Dependent Claim
78 words
The variable magnification copier machine as claimed in claim 1, which further comprises a switching means adapted to be closed, when said main switch is turned off with said optical means being in a position other than that for said usual magnification projection, so as to establish the circuit for energizing said electromotive means together with said switching means to be closed by engaging with the optically condensing means for moving the same to the usual magnification position.
Claim 4
Dependent Claim
56 words
The variable magnification copier machine as claimed in claim 1, in which said optical means comprises a support member mounted with at least two lenses mounted for projecting an image of the original at a selected magnification depending on the position of said lens support member, and said lastly referred switching means comprises a keep relay.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |