Patent US3737734A successfully refreshed from Google Patents.
US3737734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copying machine
Assignee: Minolta Co Ltd
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Filing: 1971-08-20
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Granted: 1973-06-05
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Expires: 1991-08-20
Abstract
Abstract A copying machine having a power switch, an operating switch, a relay with a contact acting as a holding switch in parallel with the power switch, and a timer. The relay is actuated in response to the closing of the operating switch following the actuation of the power switch, so as to hold the power switch. The timer is actuated upon opening of the power switch, so as to de-energize the relay only after a certain predetermined time delay. Whereby, copying operation of an original being copied is completed even if the power switch is opened by mistake in the midst of the copying operation.
Inventors
- 👤 K Nakamura
- 👤 Y Doi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:50
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/80; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/16; G03B27/30; G03B27/303; H; H03; H03K; H03K17/00; H03K17/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A circuit for controlling a current supply for loads of a copying machine comprising a main power switch, an operating switch separate from said main power switch and controlling cycling of the copying machine, a latching relay 4 having a relay contact acting as a holding switch in parallel with said main power switch, said latching relay being energized upon closing said operating switch to close said holding switch to continuously supply said loads with electric current even if the main power switch is accidently opened during copying operation, a timer starting with the opening of the main power switch and means 4'' coupled to said relay contact for retaining said holding switch in closed condition after opening said operating switch, said means being responsive to said timer to open said holding switch after the lapse of time substantially as necessitated for one cycle operation of the copying machine from the opening of said main power switch.
Claim 2
Dependent Claim
157 words
A circuit for controlling a current supply for loads of a copying machine comprising a main power switch, an operating switch separate from said main power switch and controlling cycling of the copying machine, a latching relay 4 having a relay contact acting as a holding switch in parallel with said main power switch, said latching relay being energized upon closing said operating switch to close said holding switch to continuously supply said loads with electric current even if the main power switch is accidently opened during copying operation, a timer starting with the opening of the main power switch and means 4'' coupled to said relay contact for retaining said holding switch in closed condition after opening said operating switch, said means being responsive to said timer to open said holding switch after the lapse of time substantially as necessitated for one cycle operation of the copying machine from the opening of said main power switch.
Claim 3
Dependent Claim
31 words
A circuit according to claim 1 in which said means for energizing and de-energizing the timer is a switch contact connected in series therewith and actuated by the main power switch.
Claim 4
Dependent Claim
19 words
A circuit according to claim 1 in which the duration of the delay time of the timer is adjustable.
Claim 5
Dependent Claim
123 words
In a copying machine including an electrically energized copying machine device 7, a control network comprising first means for cOnnecting said device 7 to a current source 1 including a first switch 2 connected to energize said device 7 upon the closing of said first switch, a second normally open switch 3 connected in parallel with said first switch 2, a timer 5, a second means 8 responsive to the opening of said first switch for actuating said timer, a cycling switch 6, means including a first solenoid 4 responsive to the closed condition of said cycling switch 6, and means including a second solenoid 4'' responsive to said timer 5 for opening said second switch after the timing interval of said timer.
Claim 6
Dependent Claim
123 words
In a copying machine including an electrically energized copying machine device 7, a control network comprising first means for cOnnecting said device 7 to a current source 1 including a first switch 2 connected to energize said device 7 upon the closing of said first switch, a second normally open switch 3 connected in parallel with said first switch 2, a timer 5, a second means 8 responsive to the opening of said first switch for actuating said timer, a cycling switch 6, means including a first solenoid 4 responsive to the closed condition of said cycling switch 6, and means including a second solenoid 4'' responsive to said timer 5 for opening said second switch after the timing interval of said timer.
Claim 7
Dependent Claim
65 words
The control network of claim 4 wherein said timer comprises an electronic timing network including an RC timing circuit and said second means comprises a third switch 8 coupled to and simultaneously operable with said first switch 2 to close said third switch 8 with the opening of said first switch 2, said timing network being connected through said third switch to a current source.
Claim 8
Dependent Claim
14 words
The control network of claim 4 including means 11 for adjusting said timing interval.
References Cited (Backward Citations)
US3512048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |