CA1028025A - Film speed control for sound motion picture projector - Google Patents

Film speed control for sound motion picture projector

Info

Publication number
CA1028025A
CA1028025A CA203,063A CA203063A CA1028025A CA 1028025 A CA1028025 A CA 1028025A CA 203063 A CA203063 A CA 203063A CA 1028025 A CA1028025 A CA 1028025A
Authority
CA
Canada
Prior art keywords
speed control
motion picture
film speed
picture projector
sound motion
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.)
Expired
Application number
CA203,063A
Other languages
French (fr)
Other versions
CA203063S (en
Inventor
Thomas A.O. Gross
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.)
Polaroid Corp
Original Assignee
Polaroid Corp
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 Polaroid Corp filed Critical Polaroid Corp
Application granted granted Critical
Publication of CA1028025A publication Critical patent/CA1028025A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/10—Controlling by adding a dc current
    • 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
    • G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means
    • 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
    • G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means
    • G03B31/02—Associated working of cameras or projectors with sound-recording or sound-reproducing means in which sound track is on a moving-picture film
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • H02P5/48—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another by comparing mechanical values representing the speeds
    • H02P5/485—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another by comparing mechanical values representing the speeds using differential movement of the two motors, e.g. using differential gearboxes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)
CA203,063A 1973-06-28 1974-06-21 Film speed control for sound motion picture projector Expired CA1028025A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US37463873A 1973-06-28 1973-06-28

Publications (1)

Publication Number Publication Date
CA1028025A true CA1028025A (en) 1978-03-14

Family

ID=23477627

Family Applications (1)

Application Number Title Priority Date Filing Date
CA203,063A Expired CA1028025A (en) 1973-06-28 1974-06-21 Film speed control for sound motion picture projector

Country Status (7)

Country Link
JP (1) JPS5746536B2 (en)
AT (1) AT347261B (en)
CA (1) CA1028025A (en)
DE (1) DE2428154A1 (en)
FR (1) FR2235530B1 (en)
GB (1) GB1463085A (en)
IT (1) IT1013343B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH666561A5 (en) * 1983-10-12 1988-07-29 Prontophot Holding Ag DEVICE FOR EXPOSING BORDERLESS PHOTOGRAPHIC COPIES OF DIFFERENT IMAGE FORMATS.
JPH1138527A (en) * 1993-09-24 1999-02-12 Sony Corp Digital sound signal reproducing device for projector

Also Published As

Publication number Publication date
IT1013343B (en) 1977-03-30
JPS5038535A (en) 1975-04-10
GB1463085A (en) 1977-02-02
JPS5746536B2 (en) 1982-10-04
AU7016474A (en) 1975-12-18
FR2235530A1 (en) 1975-01-24
FR2235530B1 (en) 1980-11-14
DE2428154A1 (en) 1975-01-16
ATA503374A (en) 1978-04-15
AT347261B (en) 1978-12-27

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