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GB272507A - Improvements in or relating to obscuring shutters for light projectors - Google Patents

Improvements in or relating to obscuring shutters for light projectors

Info

Publication number
GB272507A
GB272507A GB15188/27A GB1518827A GB272507A GB 272507 A GB272507 A GB 272507A GB 15188/27 A GB15188/27 A GB 15188/27A GB 1518827 A GB1518827 A GB 1518827A GB 272507 A GB272507 A GB 272507A
Authority
GB
United Kingdom
Prior art keywords
leaves
pinions
pinion
secured
toothed rims
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
GB15188/27A
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.)
Siemens Schuckertwerke AG
Original Assignee
Siemens Schuckertwerke AG
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 Siemens Schuckertwerke AG filed Critical Siemens Schuckertwerke AG
Publication of GB272507A publication Critical patent/GB272507A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/08—Controlling the distribution of the light emitted by adjustment of elements by movement of the screens or filters
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
    • G08B5/38—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

272,507. Siemens - Schuckertwerke Ges. June 8, 1926, [Convention date]. Lantern shutters.-In obscuring devices for light projectors having leaves arranged fanwise around the axis of the reflector and rotated about axes radial of the axis of the reflector, the pivot pins of the leaves are turned by at least two annular driving elements. Outer and inner toothed rims 2, 3 are coupled by a spindle 7 having pinions 8, 9, and the outer rim is rotated by a pinion 4 on the spindle 6 of the operating handle 5. Pinions 13, 14 are secured to the leaves 15 and engage with the toothed rims 2, 3 so that the leaves are uniformly turned. The pinions 13 are secured to the leaves in an adjustable manner to enable the leaves to be brought into exactly parallel planes in the open position; this adjustment comprises a cone on the pinion 13 engaging a conical friction surface within a bell-shaped screw cup 18 secured by rivets to the leaves, the cones being tightened by a screw cap 19. A screw bolt 22 supports a ball bearing within the cup 18, passes freely through the pinion 13 and lamp casing 1 and is secured bv a nut 27. A spring is interposed between the ball bearing and the pinion 13 so that by tightening the nut 27 the leaves are stretched flat. Instead of toothed rims and pinions, friction rollers or pulleys moved by an endless cord may be used. Adjoining leaves may be arranged to turn in opposite directions.
GB15188/27A 1926-06-08 1927-06-07 Improvements in or relating to obscuring shutters for light projectors Expired GB272507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE272507X 1926-06-08

Publications (1)

Publication Number Publication Date
GB272507A true GB272507A (en) 1928-02-09

Family

ID=6010615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15188/27A Expired GB272507A (en) 1926-06-08 1927-06-07 Improvements in or relating to obscuring shutters for light projectors

Country Status (1)

Country Link
GB (1) GB272507A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541834A (en) * 1947-10-02 1951-02-13 Robinson Dorothea Ursula Antiglare or dimming device for motor vehicle head lamps
US5207494A (en) * 1991-02-04 1993-05-04 Karl Storz Endoscopy-America, Inc. Dimmer for fiber optic systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541834A (en) * 1947-10-02 1951-02-13 Robinson Dorothea Ursula Antiglare or dimming device for motor vehicle head lamps
US5207494A (en) * 1991-02-04 1993-05-04 Karl Storz Endoscopy-America, Inc. Dimmer for fiber optic systems

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