GB309721A - Improvements in and relating to safety electric lamps - Google Patents

Improvements in and relating to safety electric lamps

Info

Publication number
GB309721A
GB309721A GB9410/28A GB941028A GB309721A GB 309721 A GB309721 A GB 309721A GB 9410/28 A GB9410/28 A GB 9410/28A GB 941028 A GB941028 A GB 941028A GB 309721 A GB309721 A GB 309721A
Authority
GB
United Kingdom
Prior art keywords
bulb
battery
contact
casing
construction shown
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
GB9410/28A
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.)
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 GB9410/28A priority Critical patent/GB309721A/en
Publication of GB309721A publication Critical patent/GB309721A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

309,721. Ceag, Ltd., and Plummer, R. J. March 28, 1928. Battery lamps; cut-out arrangements. - A safety lamp for use in explosive atmospheres comprises a battery casing 1 having a rocking head 7 for switching purposes and means for locking this -against unauthorized removal, the parts being arranged so that the battery can be removed without disconnecting the bulb 11 and its associated parts. In the construction shown the bulb and the reflector 22 are mounted in a casing 12 arranged on the side of the lamp, the centre contact of the bulb being connected to one battery terminal through insulated metal strips 25 &c. and rivets 17 and a resilient contact 15 adapted to be engaged by a contact 6a attached to one of the plate contacts 6 in the rocking head 7. A cover 24 prevents exposure of the conductors. A cut-out is provided which operates upon breakage of the bulb 11 or of the glass 13. In the construction shown in Fig. 1, a spring 30 holds the bulb in engagement with the resilient contact 25 which, if the glass or the bulb be broken, projects the bulb from its seat in the reflector with which it contacts to short-circuit the battery and blow a fuse. In the construction shown in Fig. 2, the bulb is held in its seat by a frame 31 pivoted at 32 to the " earthed " casing 12 and controlled by a spring 35. If the bulb 11 breaks, the frame is rocked and an arm 36 engages the contact 25 to short-circuit the battery.
GB9410/28A 1928-03-28 1928-03-28 Improvements in and relating to safety electric lamps Expired GB309721A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9410/28A GB309721A (en) 1928-03-28 1928-03-28 Improvements in and relating to safety electric lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9410/28A GB309721A (en) 1928-03-28 1928-03-28 Improvements in and relating to safety electric lamps

Publications (1)

Publication Number Publication Date
GB309721A true GB309721A (en) 1929-04-18

Family

ID=9871427

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9410/28A Expired GB309721A (en) 1928-03-28 1928-03-28 Improvements in and relating to safety electric lamps

Country Status (1)

Country Link
GB (1) GB309721A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155249A (en) * 1984-03-02 1985-09-18 Whitecroft Plc A lighting fitting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155249A (en) * 1984-03-02 1985-09-18 Whitecroft Plc A lighting fitting

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