GB511551A - Improvements in miners' lamps - Google Patents

Improvements in miners' lamps

Info

Publication number
GB511551A
GB511551A GB9375/38A GB937538A GB511551A GB 511551 A GB511551 A GB 511551A GB 9375/38 A GB9375/38 A GB 9375/38A GB 937538 A GB937538 A GB 937538A GB 511551 A GB511551 A GB 511551A
Authority
GB
United Kingdom
Prior art keywords
switched
lamp
lantern
detector
gas
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
GB9375/38A
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.)
CEAG Ltd
ROBERT JONAS PLUMMER
Original Assignee
CEAG Ltd
ROBERT JONAS PLUMMER
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 CEAG Ltd, ROBERT JONAS PLUMMER filed Critical CEAG Ltd
Priority to GB9375/38A priority Critical patent/GB511551A/en
Publication of GB511551A publication Critical patent/GB511551A/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
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L2/00—Systems of electric lighting devices
    • 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
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for

Abstract

511,551. Gas-detectors. CEAG, Ltd., and PLUMMER, R. J. March 26, 1938, No. 9375. [Class 1 (i)] A gas-detector of the Wheatstone bridge type is mounted between the battery casing a and the bull's-eye lantern h of a miner's lamp. The resistances d are housed in cells e', e<2>, the former being sealed and the latter provided with flame-proof inlet and outlet. The scale m of the ammeter b may be illuminated by a supplementary lamp (not shown) which is switched on when the main lamp is switched off, this being effected by turning the bezel ring h surrounding the lantern. The detector is switched on by pressing a push-button c.
GB9375/38A 1938-03-26 1938-03-26 Improvements in miners' lamps Expired GB511551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9375/38A GB511551A (en) 1938-03-26 1938-03-26 Improvements in miners' lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9375/38A GB511551A (en) 1938-03-26 1938-03-26 Improvements in miners' lamps

Publications (1)

Publication Number Publication Date
GB511551A true GB511551A (en) 1939-08-21

Family

ID=9870754

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9375/38A Expired GB511551A (en) 1938-03-26 1938-03-26 Improvements in miners' lamps

Country Status (1)

Country Link
GB (1) GB511551A (en)

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