US1804499A - Cinematographic projection apparatus - Google Patents

Cinematographic projection apparatus Download PDF

Info

Publication number
US1804499A
US1804499A US223977A US22397727A US1804499A US 1804499 A US1804499 A US 1804499A US 223977 A US223977 A US 223977A US 22397727 A US22397727 A US 22397727A US 1804499 A US1804499 A US 1804499A
Authority
US
United States
Prior art keywords
film
projection apparatus
nozzles
air
head
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 - Lifetime
Application number
US223977A
Inventor
Engelmann Max
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US1804499A publication Critical patent/US1804499A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G03B21/16—Cooling; Preventing overheating

Definitions

  • the present invention relates to acinematographic projection apparatus and especially to apparatus for cooling the film or the film track.
  • the band or film is so strongly heated that it would be ignited if the light were permitted to fall upon the film at rest.
  • the film becomes heated and in time becomes brittle.
  • the film track and the neighboring parts of the apparatus become strongly heated.
  • a rigid tube is employed and it is placed in the interior of the completely inclosed' mechanism.
  • the conductor carrying the air under pressure enters the casing at a suitable place, while the tube proceeds "to other places arid leads into the blast nozzles.
  • the tube may 4 branch ofi at difierent points in order to 223,977, and in Germany October 29, 1926.
  • Figure 1 shows the apparatus with the lamp house and air compressor.
  • Figure 2 shows the casing containing the driving mechanism with the back or outside wall removed.
  • Figure 3 shows the said casingfrom the side and having the exterior wall partly broken away to exhibit the parts.
  • Figpre 4.- is a view looking from the left side of igure 3 showing the position of the film in reference to the nozzles.
  • the compressed air is produced by the compressor 1 and is conducted to the a paratus by means of a tube conductor 2.
  • T e base 4 go of the housing is provided with an opening and carries a connecting sleeve 5.
  • the tube 6 Connected with the sleeve 5 and within the casing is the tube 6 which leads from the sleeve 5 to a distributor 7 from which lead two more tubes 8 and 9. These pass through the side wall 10 of the casing and end in nozzles 11 and 12, which are positioned near the-film I track 13 or near the film window 14.
  • the tubes 6, 8, 9, the distributor 7 and the nozzles 11 and 12 are made of rigid material as described above and may be ofmetal such as brass or nickel or of a non-metallic and fireproof character such as asbestos in combination with a suitable binding a nt, such asbestos compositions being well own in the art.
  • the tube 2 leading from the compressor may be of strong rubber hose but is also preferably of metal.

Description

May 12, 1931. ENGELMANN 1,804,499
CINEMATOG RAPHIC PROJECTION APPARATUS Filed Oct. 4. 1927 Fig.4
'Jnuznior Patented May l2, i931 UNITED STATES MAX ENGEIMANN, F LA'USA, GER-MANY GINE'MA TOGRAPHIC PROJECTION APPARATUS Application filed October 4, 1927, Serial No.
The present invention relates to acinematographic projection apparatus and especially to apparatus for cooling the film or the film track.
In the projection apparatus in which the picture band or film is illuminated by a very strong source of light, the band or film is so strongly heated that it would be ignited if the light were permitted to fall upon the film at rest. However, even when the apparatus is in operationthe film becomes heated and in time becomes brittle. In addition to the film, the film track and the neighboring parts of the apparatus become strongly heated. I
In order to avoid these disadvantages air blasts have already been ,,proposed which blow a stream of air under pressure against the film and the film track, and thus an ex- -cessive heating is prevented. In these proposed apparatuses the air from the compressor was led through tubes of fiexible material from the exterior of the apparatus to the nozzles through which the air under pressure was blown against the places to be cooled. These nozzles are positioned ve:y near the film track or the film window, and it is known that these flexible air tubes which lead to the nozzles are very troublesome since they prevent the operator from operating the film door easily and quickly. If rubber tubing is used for conducting the air under pressure, there also arises the great danger of easily damaging it in case it comes too near the lamp house or other part of the apparatus. 7
According to the present invention a rigid tube is employed and it is placed in the interior of the completely inclosed' mechanism.
The conductor carrying the air under pressure enters the casing at a suitable place, while the tube proceeds "to other places arid leads into the blast nozzles. The tube may 4 branch ofi at difierent points in order to 223,977, and in Germany October 29, 1926.
supply several nozzles at the same time with air.
Figure 1 shows the apparatus with the lamp house and air compressor. Figure 2 shows the casing containing the driving mechanism with the back or outside wall removed. Figure 3 shows the said casingfrom the side and having the exterior wall partly broken away to exhibit the parts. Figpre 4.- is a view looking from the left side of igure 3 showing the position of the film in reference to the nozzles. c
The compressed air is produced by the compressor 1 and is conducted to the a paratus by means of a tube conductor 2. T e base 4 go of the housing is provided with an opening and carries a connecting sleeve 5. Connected with the sleeve 5 and within the casing is the tube 6 which leads from the sleeve 5 to a distributor 7 from which lead two more tubes 8 and 9. These pass through the side wall 10 of the casing and end in nozzles 11 and 12, which are positioned near the-film I track 13 or near the film window 14.
The tubes 6, 8, 9, the distributor 7 and the nozzles 11 and 12 are made of rigid material as described above and may be ofmetal such as brass or nickel or of a non-metallic and fireproof character such as asbestos in combination with a suitable binding a nt, such asbestos compositions being well own in the art. The tube 2 leading from the compressor may be of strong rubber hose but is also preferably of metal.
Having described my invention what I .80 claim is:
The combination with a cinematographic projection head and a film gate supported by said head and disposed outwardly thereof of a vertically extending pipe arranged wit said head, 'a coupling arranged upon the upper end ,of said pipe, branch pipes each havingoneendconnectedtp said cou ling and its opposite end extended exteriorly of the head and projecting near the film gate on the latter, 'a. nozzle secured and connected to each of said projecting ends of the branch pipes extended exterior? of the head, said nozzles being disposed a jacent the film gate on each side thereof, and a. main coupling arranged exteriorly of the head and connected to the lower end of the vertically extending pipe within the head, whereby an air supply conduit may be directly connected to said coupling for the purpose specified.
In witness whereof I have hereunto set my hand.
MAX ENGELMANN.
US223977A 1926-10-29 1927-10-04 Cinematographic projection apparatus Expired - Lifetime US1804499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1804499X 1926-10-29

Publications (1)

Publication Number Publication Date
US1804499A true US1804499A (en) 1931-05-12

Family

ID=7744044

Family Applications (1)

Application Number Title Priority Date Filing Date
US223977A Expired - Lifetime US1804499A (en) 1926-10-29 1927-10-04 Cinematographic projection apparatus

Country Status (1)

Country Link
US (1) US1804499A (en)

Similar Documents

Publication Publication Date Title
US1804499A (en) Cinematographic projection apparatus
GB579129A (en) Improvements relating to the stopping or sealing of gas mains
US2596393A (en) Attachment for opaque projection by transparency projectors
US2435300A (en) Projector for microscopes and other magnifying devices
US2258014A (en) Illuminating device for enlarging or projecting apparatus
US1937379A (en) High intensity multiple arc projection lamp machine
US1717234A (en) Protection of films against fire
US1550320A (en) Projecting apparatus
US2556769A (en) Heat absorbing device for motionpicture projecting machines
US1472786A (en) Shutter-actuating mechanism
US1346319A (en) Photographic projection apparatus
US2549866A (en) Apparatus for visual detection of illuminated suspended matter in fluids
US892088A (en) Marine fire-indicating system and extinguisher.
US721476A (en) Apparatus for ascertaining the condition of pipe-conduits.
US859323A (en) Vacuum cut-off.
ES2042448T1 (en) DEVICE WITH A WALL-MOUNTING CLAMP FOR AN EXTENDED CYLINDRICAL BODY OF ANY KIND.
US1598652A (en) Traffic signal
GB331743A (en) Cooling device for cinematographic projection apparatus
US1928427A (en) Cinematographic projector
US1820054A (en) Light guard for motion picture projection machines
GB327812A (en) Improvements in smoke inspection devices for boiler furnaces
GB191103350A (en) A Lamp for Photographic Purposes.
GB191326276A (en) A New or Improved Submarine Photographic Apparatus.
GB191114439A (en) An Automatic Electric Fire Alarm.
FR479200A (en) Coupling for flexible hoses with shut-off device of the flow passage, more especially, applicable to compressed air or vacuum brakes