US3875387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic operations monitor
Assignee: Individual
•
Filing: 1974-03-21
•
Granted: 1975-04-01
•
Expires: 1994-03-21
Abstract
Abstract A magnetics operation monitor employing a sensor adapted to sense the presence of a changing electromagnetic field for producing an electrical signal. The electrical signal is coupled to an adapter unit which provides a triggering pulse to a driver, which in turn provides a fixed duration pulse. The fixed duration pulse is coupled to a gating unit which in turn couples a recording signal source for the duration of the gating signal to a transcription device such as a tape recorder or the like.
Inventors
- 👤 Michael E Bostic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:10
CPC Classifications
G; G07; G07C; G07C3/00; G07C3/08; G07C3/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
128 words
A recorder for recording over a time interval events occurring in a copying or document reproduction machine, said machine having a component which when actuated reflects the occurrence of the event being recorded together with electromagnetic drive means for actuating said component, the combination of: a magnetic sensor adapted for disposition adjacent said drive means so as to produce an electrical signal in response to a magnetic variation in said drive means representing actuation of said machine component, first means for converting the electrical signal from said sensor to a gating signal, second means coupled to said first means and responsive to said gating signal for providing a recording signal representing actuation of said component, and recording means coupled to said second means for recording said recording signal.
Claim 2
Dependent Claim
128 words
A recorder for recording over a time interval events occurring in a copying or document reproduction machine, said machine having a component which when actuated reflects the occurrence of the event being recorded together with electromagnetic drive means for actuating said component, the combination of: a magnetic sensor adapted for disposition adjacent said drive means so as to produce an electrical signal in response to a magnetic variation in said drive means representing actuation of said machine component, first means for converting the electrical signal from said sensor to a gating signal, second means coupled to said first means and responsive to said gating signal for providing a recording signal representing actuation of said component, and recording means coupled to said second means for recording said recording signal.
Claim 3
Dependent Claim
17 words
The recorder of claim 1 in which said machine component comprises a counter for counting copies made.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |