DE509673C - Optical fire protection device for cinema projector - Google Patents

Optical fire protection device for cinema projector

Info

Publication number
DE509673C
DE509673C DEZ17123D DEZ0017123D DE509673C DE 509673 C DE509673 C DE 509673C DE Z17123 D DEZ17123 D DE Z17123D DE Z0017123 D DEZ0017123 D DE Z0017123D DE 509673 C DE509673 C DE 509673C
Authority
DE
Germany
Prior art keywords
fire protection
protection device
cinema projector
optical fire
optical
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
DEZ17123D
Other languages
German (de)
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
Publication date
Priority to DEZ17123D priority Critical patent/DE509673C/en
Application granted granted Critical
Publication of DE509673C publication Critical patent/DE509673C/en
Expired 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/18—Fire preventing or extinguishing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Description

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (1)

Patentanspruch:Claim: Optische Beleuchtungseinrichtung für Kinobildwerfer, dadurch gekennzeichnet, daß als Feuerschutz eine zu anderen Zwecken bereits bekannte Glasscheibe mit nebeneinanderliegenden positiven oder negativen zylindrischen Einschliffen dient.Optical lighting device for cinema projectors, characterized in that that as a fire protection a glass pane already known for other purposes with juxtaposed positive or negative cylindrical grinding is used.
DEZ17123D Optical fire protection device for cinema projector Expired DE509673C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEZ17123D DE509673C (en) Optical fire protection device for cinema projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEZ17123D DE509673C (en) Optical fire protection device for cinema projector

Publications (1)

Publication Number Publication Date
DE509673C true DE509673C (en) 1930-10-11

Family

ID=7624236

Family Applications (1)

Application Number Title Priority Date Filing Date
DEZ17123D Expired DE509673C (en) Optical fire protection device for cinema projector

Country Status (1)

Country Link
DE (1) DE509673C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974238C (en) * 1941-09-23 1960-10-27 Zeiss Ikon Ag Lighting device, in particular for projection purposes
DE4335244A1 (en) * 1993-10-15 1995-06-22 Daimler Benz Ag Device for improving driver visibility in automobiles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974238C (en) * 1941-09-23 1960-10-27 Zeiss Ikon Ag Lighting device, in particular for projection purposes
DE4335244A1 (en) * 1993-10-15 1995-06-22 Daimler Benz Ag Device for improving driver visibility in automobiles
DE4335244B4 (en) * 1993-10-15 2006-10-19 Daimlerchrysler Ag Arrangement for image recording

Similar Documents

Publication Publication Date Title
DE509673C (en) Optical fire protection device for cinema projector
FR784667A (en) New glass composition usable in electricity
FR41169E (en) Improvements in sheet glass stretchers
FR887248A (en) Blackout device for light projectors, in particular for hand lanterns
AU2472430A (en) Improvements in photographic flashlight cartridge
FR829566A (en) Measuring device with luminous indicator serving to represent the relationship between several quantities
AU104194B2 (en) Improvements in aspherical and like lenses, mirrors andother precision optical devices
CA310687A (en) Sheet glass handling mechanism
ES140788A1 (en) A magnifying glass with adapter and lighting device.
AU2490530A (en) Improvements in photograhic film with soundtrack indication
CA357762A (en) Photographic flashlamp testing device
CA350987A (en) Negative glow display device
CA356802A (en) Light measuring device
CA351167A (en) Fresnel lens
CA347248A (en) Photographic sheet
CA345773A (en) Optical light dividing device
CA360019A (en) Light projector
CA316449A (en) Camera rewinding and resetting mechanism
FR816073A (en) Improvements in apparatus intended for drawing sheet glass
GB334095A (en) Improvements in and relating to cinematograph projectors
AU2286535A (en) Improvements in incinerators
GB297640A (en) Improvements in reflective signs
ES115703A2 (en) Luminous plate with colored tubes or small sticks arranged between the light source and the letters, figures or signs that make up a transparent.
ES132431A1 (en) Procedure to use plates, films and film-pack of different dimensions in a photographic device.
CA362817A (en) Roll holding camera