GB304274A - Improvements in or relating to projector lamps - Google Patents

Improvements in or relating to projector lamps

Info

Publication number
GB304274A
GB304274A GB27034/28A GB2703428A GB304274A GB 304274 A GB304274 A GB 304274A GB 27034/28 A GB27034/28 A GB 27034/28A GB 2703428 A GB2703428 A GB 2703428A GB 304274 A GB304274 A GB 304274A
Authority
GB
United Kingdom
Prior art keywords
shaft
condenser
arc
shutter
objective lens
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
GB27034/28A
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.)
Hall & Connolly Inc
Original Assignee
Hall & Connolly Inc
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 Hall & Connolly Inc filed Critical Hall & Connolly Inc
Publication of GB304274A publication Critical patent/GB304274A/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
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2026—Gas discharge type light sources, e.g. arcs
    • 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
    • G03B21/20—Lamp housings
    • G03B21/2053—Intensity control of illuminating light
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/10—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures of iris type

Abstract

304,274. Hall & Connolly, Inc., (Assignees of Hall, T.). Jan. 18, 1928, [Convention date]. Optical apparatus.-In a projector lamp adapted for quick change from a spot light to flood lighting, comprising an arc lamp 1, a condenser lens 4, an objective lens 40 and an adjustable shutter 13, interconnected mechanism is provided for changing the relative position of the arc and the condenser and simultaneously adjusting the size of the aperture in the shutter. The base 9 of the arc lamp mechanism is slidably mounted on a rotatable shaft 12 having a threaded part engaging one foot 8 of the base so that rotation of a thumb piece 10 adjusts the position of the arc relative to the condenser 4 which is fixed to the lamp housing 6. A square sleeve 44<1> slidable on the shaft 12 drives by bevel gears 19 a vertical shaft 18 connected by bevel gears 20, 21 with the operating means of the iris diaphragm 13. For initial setting, the iris diaphragm can be adjusted independently of the light source by pushing up a thumb piece 26 on the shaft 18 against a spring 27 to disengage the bevel gears 19, and then turning the thumb piece 26, the shaft 18 being in two parts connected by a slot and pin connection 25. The objective lens 40 can be adjusted independently on rods 15 by a shaft 28. In a modification, Fig. 2 (not shown), the condenser is movable relatively to the arc and interconnected with both the iris diaphragm mechanism and the mechanism for adjusting the objective lens so that these are simultaneously adjusted. Slip couplings on the shafts permit of independent adjustment of the shutter and objective lens, and the arc lamp mechanism may be separately adjusted. Hollow telescoping cones 45, 46 form a shield for the cone of light between the shutter and the condenser.
GB27034/28A 1928-01-18 1928-09-20 Improvements in or relating to projector lamps Expired GB304274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US304274XA 1928-01-18 1928-01-18

Publications (1)

Publication Number Publication Date
GB304274A true GB304274A (en) 1929-10-03

Family

ID=21854156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27034/28A Expired GB304274A (en) 1928-01-18 1928-09-20 Improvements in or relating to projector lamps

Country Status (1)

Country Link
GB (1) GB304274A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19643220C1 (en) * 1996-08-23 1998-02-12 Josef Dipl Ing Altmann Imaging system with variable focal length for a spotlight in stage / studio technology
ITMI20091563A1 (en) * 2009-09-11 2011-03-12 Clay Paky Spa HEADLAMP FOR STAGE AND METHOD FOR OPERATING A HEADLAMP FOR STAGE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19643220C1 (en) * 1996-08-23 1998-02-12 Josef Dipl Ing Altmann Imaging system with variable focal length for a spotlight in stage / studio technology
ITMI20091563A1 (en) * 2009-09-11 2011-03-12 Clay Paky Spa HEADLAMP FOR STAGE AND METHOD FOR OPERATING A HEADLAMP FOR STAGE
US8408755B2 (en) 2009-09-11 2013-04-02 Clay Paky S.P.A. Stage lighting fixture and method of operating a stage lighting fixture

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