GB683714A - Improvements in portable electric battery lamps - Google Patents

Improvements in portable electric battery lamps

Info

Publication number
GB683714A
GB683714A GB10252/50A GB1025250A GB683714A GB 683714 A GB683714 A GB 683714A GB 10252/50 A GB10252/50 A GB 10252/50A GB 1025250 A GB1025250 A GB 1025250A GB 683714 A GB683714 A GB 683714A
Authority
GB
United Kingdom
Prior art keywords
sleeve
bulb
lens
aperture
stop
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
GB10252/50A
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
Priority to GB10252/50A priority Critical patent/GB683714A/en
Publication of GB683714A publication Critical patent/GB683714A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters

Abstract

683,714. Electric battery lamps. DENNY, C. W. April 23, 1951 [April 26, 1950], No. 10252/50. Class 75(iv) In a lamp of the kind provided with a tubular light - transmitting sleeve which is slidable axially relative to a bulb and associated reflector and provided along its length with two or more coloured portions for transmitting light of different colours, e.g. for signalling, the sleeve d, d' is slidably mounted within an aperture at the centre of the front glass or lens f<SP>1</SP> of the lamp and operated by a direct push or pull upon a flange or knob k. The lens is preferably made of transparent plastic material. Outward movement of the sleeve is limited by a lateral stud f on the portion behind the lens. Two degrees of inward movement are obtained by providing the flange k with an aperture e<SP>1</SP>, and the lens with a projecting stud or stop e, so that by rotating the sleeve to align the aperture with the stop the full inward movement of the sleeve is obtained and the green portion thereof Jsurrounds the bulb c, otherwise the inward movement is limited by the stop e and the red portion of the sleeve surrounds the bulb. A white light is. obtained by withdrawing the sleeve to the position shown in the drawing. The surface c<SP>1</SP> of the half of the bulb remote from the lamp cap is silvered and painted to prevent stray light from the bulb entering the sleeve.
GB10252/50A 1950-04-26 1950-04-26 Improvements in portable electric battery lamps Expired GB683714A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB10252/50A GB683714A (en) 1950-04-26 1950-04-26 Improvements in portable electric battery lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10252/50A GB683714A (en) 1950-04-26 1950-04-26 Improvements in portable electric battery lamps

Publications (1)

Publication Number Publication Date
GB683714A true GB683714A (en) 1952-12-03

Family

ID=9964438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10252/50A Expired GB683714A (en) 1950-04-26 1950-04-26 Improvements in portable electric battery lamps

Country Status (1)

Country Link
GB (1) GB683714A (en)

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