US4091275A
Expired / Lapsed
US
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Automatic focus system with oscillation inhibit circuit
Assignee: Honeywell Inc
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Filing: 1976-10-07
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Granted: 1978-05-23
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Expires: 1996-10-07
Abstract
Abstract An automatic continuous focus system includes means for inhibiting movement of the primary lens unless each focus control signal within a predetermined time requires position correction in the same direction.
Inventors
- 👤 Dennis J. Wilwerding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:49
CPC Classifications
G; G01; G01C; G01C3/00; G01C3/02; G01C3/06; G01C3/08; G01C3/085; G02; G02B; G02B7/00; G02B7/28; G02B7/30; G02B7/305
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
54 words
In a continuous focus system having focus control means for providing focus correction signals, and positioning means for positioning optical means in response to the focus correction signals, the improvement comprising: inhibit means for inhibiting the positioning means unless each focus correction signal within a predetermined time requires position correction in the same direction.
Claim 2
Dependent Claim
54 words
In a continuous focus system having focus control means for providing focus correction signals, and positioning means for positioning optical means in response to the focus correction signals, the improvement comprising: inhibit means for inhibiting the positioning means unless each focus correction signal within a predetermined time requires position correction in the same direction.
Claim 3
Dependent Claim
75 words
The invention of claim 1 wherein the inhibit means comprises: counter means having a count input for receiving count signals, a reset input for receiving reset signals, and an output, the output having an enable state when the counter is full and an inhibit state when the counter is not full; and reset means for applying a reset signal to the reset input if the focus control signals require a change in position correction direction.
Claim 4
Dependent Claim
33 words
The invention of claim 2 wherein the inhibit means further comprises: latch means for latching the counter means in the enable state once the counter is full until a reset signal is received.
Claim 5
Dependent Claim
16 words
The invention of claim 2 and further comprising: timing means for periodically supplying the count signals.
Claim 6
Dependent Claim
67 words
In a continuous automatic focus system having focus control means for providing focus correction signal, and positioning means for positioning optical means in response to the focus correction signals, the improvement comprising: inhibit means for inhibiting the positioning means from positioning the optical means in response to the focus correction signals unless a predetermined number of consecutive focus correction signals require position correction in the same direction.
Claim 7
Dependent Claim
67 words
In a continuous automatic focus system having focus control means for providing focus correction signal, and positioning means for positioning optical means in response to the focus correction signals, the improvement comprising: inhibit means for inhibiting the positioning means from positioning the optical means in response to the focus correction signals unless a predetermined number of consecutive focus correction signals require position correction in the same direction.
References Cited (Backward Citations)
US3572928A
Cited
US4010479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |