US3898006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure lamp control device
Assignee: Canon Inc
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Filing: 1974-08-27
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Granted: 1975-08-05
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Expires: 1994-08-27
Abstract
Abstract A device for controlling an exposure lamp for projecting an original image by changing pulse repetition rate or pulse width which activates the lamp. There are included a pulse oscillator, a pulse width controlling circuit, and a switching circuit. The pulse oscillator includes a plurality of pulse repetition rate setting circuits corresponding to the number of desired color separations. The pulse width controlling circuit includes a plurality of pulse width setting circuits corresponding to the number of desired color separations. The pulse repetition rate of the pulse oscillator or the pulse width of the pulse controlling circuit may be set to a desired value depending upon a desired separation negative.
Inventors
- 👤 Yoshimasa Kimura
- 👤 Hisashi Sakamaki
- 👤 Toshio Honma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:35
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/80; G03B27/73; G03G; G03G15/00; G03G15/01; G03G15/0105; G03G15/011
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
A device for controlling an exposure lamp for exposing or projecting an original image comprising: a. a pulse oscillator means whose pulse repetition rate is variable, b. a pulse width conversion or changing means for changing the pulse width of the output pulses of said pulse oscillator means, and c. a switching means adapted to be turned on and off in response to the output pulses from said pulse width conversion or changing means.
Claim 2
Independent Claim
74 words
A device for controlling an exposure lamp for exposing or projecting an original image comprising: a. a pulse oscillator means whose pulse repetition rate is variable, b. a pulse width conversion or changing means for changing the pulse width of the output pulses of said pulse oscillator means, and c. a switching means adapted to be turned on and off in response to the output pulses from said pulse width conversion or changing means.
Claim 3
Dependent Claim
127 words
In an exposure and projection system including color separating means for exposIng and projecting an original image in different colors, an exposure lamp control device comprising: a. means for switching said color separating means depending upon a desired separation negative, b. pulse oscillator means comprising means for adjusting pulse repetition rate thereof to a desired value, c. pulse width conversion or changing means comprising means for adjusting the output pulse width thereof to a desired value in accordance with the pulse width of the output pulses from said pulse oscillator means, and d. switching means adapted to be turned on and off in response to the output pulses from said pulse width conversion or changing means, thereby controlling the on-off operation of an exposure lamp or lamps,
Claim 4
Dependent Claim
127 words
In an exposure and projection system including color separating means for exposIng and projecting an original image in different colors, an exposure lamp control device comprising: a. means for switching said color separating means depending upon a desired separation negative, b. pulse oscillator means comprising means for adjusting pulse repetition rate thereof to a desired value, c. pulse width conversion or changing means comprising means for adjusting the output pulse width thereof to a desired value in accordance with the pulse width of the output pulses from said pulse oscillator means, and d. switching means adapted to be turned on and off in response to the output pulses from said pulse width conversion or changing means, thereby controlling the on-off operation of an exposure lamp or lamps,
Claim 5
Dependent Claim
80 words
A device as defined in claim 2 wherein said pulse oscillator or generator means includes: a. a plurality of pulse repetition rate setting means corresponding to the number of desired separations for setting a pulse repetition rate depending upon a desired separation negative, b. means for selecting and switching said pulse repetition rate setting means, and c. means for operatively interconnecting said selecting and switching means and means for switching said color separating means depending upon a desired separation negative.
Claim 6
Dependent Claim
78 words
A device as defined in claim 2 wherein said pulse width conversion or changing means includes: a. a plurality of pulse width setting means corresponding to the number of desired separations for setting a pulse width depending upon a desired separation negative, b. means for selecting and switching said pulse width setting means, and c. means for operatively interconnecting said selecting and switching means and means for switching said color separating means depending upon a desired separation negative.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |