GB519493A - Improvements in electric flashlights - Google Patents

Improvements in electric flashlights

Info

Publication number
GB519493A
GB519493A GB32018/38A GB3201838A GB519493A GB 519493 A GB519493 A GB 519493A GB 32018/38 A GB32018/38 A GB 32018/38A GB 3201838 A GB3201838 A GB 3201838A GB 519493 A GB519493 A GB 519493A
Authority
GB
United Kingdom
Prior art keywords
lamp
cap
plunger
casing
disc
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
GB32018/38A
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.)
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 GB32018/38A priority Critical patent/GB519493A/en
Publication of GB519493A publication Critical patent/GB519493A/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)
  • Secondary Cells (AREA)

Abstract

519,493. Electric battery lamps. ARDEN, T. R. Nov. 4, 1938, No. 32018. [Class 39 (ii)] A battery lamp is constructed to contain two sets of cells 60, of semi-cylindrical cross-section. Normally only one set is used to supply the lamp when the usual switch is closed. When this set is depleted, the other set is brought in circuit by a halfrotation . of the end-cap 45. Whereupon a "D" aperture in the cap 45 is aligned with a similar aperture in disc 44 and the exhausted set is expelled by a spring contact plunger 31. When. a new set is inserted in lieu of the exhausted set, the disc 44 is half rotated so as to retain the new set, which thereupon becomes the reserve set. When one set of cells is absent, the corresponding contact' plunger 31 prepares the circuit of an indicator lamp which is illuminated when the main lamp is energized so as to give a warning that the casing does not contain a reserve set. Alternatively the 'plunger 31 may operate a shutter to uncover an indicator window. By removal of the cap .45 a normal cylindrical type battery can be inserted in the casing in place of the special cross-section batteries.
GB32018/38A 1938-11-04 1938-11-04 Improvements in electric flashlights Expired GB519493A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB32018/38A GB519493A (en) 1938-11-04 1938-11-04 Improvements in electric flashlights

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32018/38A GB519493A (en) 1938-11-04 1938-11-04 Improvements in electric flashlights

Publications (1)

Publication Number Publication Date
GB519493A true GB519493A (en) 1940-03-28

Family

ID=10331814

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32018/38A Expired GB519493A (en) 1938-11-04 1938-11-04 Improvements in electric flashlights

Country Status (1)

Country Link
GB (1) GB519493A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990013879A1 (en) * 1989-05-05 1990-11-15 James Timothy Toohey Location marker
WO1990013478A1 (en) * 1989-05-12 1990-11-15 Terence Robert Day Annular body aircraft

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990013879A1 (en) * 1989-05-05 1990-11-15 James Timothy Toohey Location marker
US5400008A (en) * 1989-05-05 1995-03-21 Toohey; James T. Location marker
WO1990013478A1 (en) * 1989-05-12 1990-11-15 Terence Robert Day Annular body aircraft

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