FR2282657A1 - Transparency projector lamp - has a device for its light intensity control - Google Patents

Transparency projector lamp - has a device for its light intensity control

Info

Publication number
FR2282657A1
FR2282657A1 FR7428399A FR7428399A FR2282657A1 FR 2282657 A1 FR2282657 A1 FR 2282657A1 FR 7428399 A FR7428399 A FR 7428399A FR 7428399 A FR7428399 A FR 7428399A FR 2282657 A1 FR2282657 A1 FR 2282657A1
Authority
FR
France
Prior art keywords
light intensity
intensity control
projector
projector lamp
built
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7428399A
Other languages
French (fr)
Other versions
FR2282657B1 (en
Inventor
Jacques Raflin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SOFED
Original Assignee
SOFED
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SOFED filed Critical SOFED
Priority to FR7428399A priority Critical patent/FR2282657A1/en
Priority to DE19752533944 priority patent/DE2533944A1/en
Publication of FR2282657A1 publication Critical patent/FR2282657A1/en
Application granted granted Critical
Publication of FR2282657B1 publication Critical patent/FR2282657B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B23/00—Devices for changing pictures in viewing apparatus or projectors
    • G03B23/18—Devices for changing pictures in viewing apparatus or projectors with fade-in and fade-out effects

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)

Abstract

The projector is of the type in which a number of transparencies is consecutively projected, and which is provided with a built-in electrically operated transparency changing means, and with a remote control device controlling the transparency changing device, with the projector system supplied from a.c. mains. The light intensity control device is built into the projector and has a remotely controlled motor which operates through reduction gears the wiper of a potentiometer which controls the input voltage of an electronic light intensity control circuit. This input is a low d.c. voltage supplied by a transformer and rectifier.
FR7428399A 1974-08-19 1974-08-19 Transparency projector lamp - has a device for its light intensity control Granted FR2282657A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7428399A FR2282657A1 (en) 1974-08-19 1974-08-19 Transparency projector lamp - has a device for its light intensity control
DE19752533944 DE2533944A1 (en) 1974-08-19 1975-07-30 DEVICE FOR REGULATING THE LIGHT LEVEL OF THE PROJECTION LAMP OF A SLIDE IMAGER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7428399A FR2282657A1 (en) 1974-08-19 1974-08-19 Transparency projector lamp - has a device for its light intensity control

Publications (2)

Publication Number Publication Date
FR2282657A1 true FR2282657A1 (en) 1976-03-19
FR2282657B1 FR2282657B1 (en) 1977-03-18

Family

ID=9142439

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7428399A Granted FR2282657A1 (en) 1974-08-19 1974-08-19 Transparency projector lamp - has a device for its light intensity control

Country Status (2)

Country Link
DE (1) DE2533944A1 (en)
FR (1) FR2282657A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB904321A (en) * 1959-02-09 1962-08-29 Nestor Carrillo Improvements in slide projectors
CH455318A (en) * 1966-04-28 1968-06-28 Erni Ernst Method for operating a projection device and scanning device for carrying out this method
FR2084350A7 (en) * 1970-03-25 1971-12-17 Agfa Gevaert Ag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB904321A (en) * 1959-02-09 1962-08-29 Nestor Carrillo Improvements in slide projectors
CH455318A (en) * 1966-04-28 1968-06-28 Erni Ernst Method for operating a projection device and scanning device for carrying out this method
FR2084350A7 (en) * 1970-03-25 1971-12-17 Agfa Gevaert Ag

Also Published As

Publication number Publication date
FR2282657B1 (en) 1977-03-18
DE2533944A1 (en) 1976-03-04

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Legal Events

Date Code Title Description
ST Notification of lapse