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GB533551A - Improvements in or relating to electric torches, electric flashlamps, and like portable electric lamps - Google Patents

Improvements in or relating to electric torches, electric flashlamps, and like portable electric lamps

Info

Publication number
GB533551A
GB533551A GB2902339A GB2902339A GB533551A GB 533551 A GB533551 A GB 533551A GB 2902339 A GB2902339 A GB 2902339A GB 2902339 A GB2902339 A GB 2902339A GB 533551 A GB533551 A GB 533551A
Authority
GB
United Kingdom
Prior art keywords
electric
flashlamps
relating
lamps
torches
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
GB2902339A
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 GB2902339A priority Critical patent/GB533551A/en
Publication of GB533551A publication Critical patent/GB533551A/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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0414—Arrangement of electric circuit elements in or on lighting devices the elements being switches specially adapted to be used with portable lighting devices

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

533,551. Electric battery lamps; gravityoperated switches. WALKER, A. Oct. 31, 1939, Nos. 29023 and 29024. [Class 39 (ii)] [Also in Group XXXVII] A gravity-operated switch combined with or adapted for use in an electric torch comprises a shallow container formed by two interengaging but mutually insulated dished metal parts d, dl which are electrically bridged when the torch is tilted downwardly by a metal disc f2. The disc may have a peripheral knife-edge which co-operates with an annular groove formed on the part d1.
GB2902339A 1939-10-31 1939-10-31 Improvements in or relating to electric torches, electric flashlamps, and like portable electric lamps Expired GB533551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2902339A GB533551A (en) 1939-10-31 1939-10-31 Improvements in or relating to electric torches, electric flashlamps, and like portable electric lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2902339A GB533551A (en) 1939-10-31 1939-10-31 Improvements in or relating to electric torches, electric flashlamps, and like portable electric lamps

Publications (1)

Publication Number Publication Date
GB533551A true GB533551A (en) 1941-02-14

Family

ID=10285009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2902339A Expired GB533551A (en) 1939-10-31 1939-10-31 Improvements in or relating to electric torches, electric flashlamps, and like portable electric lamps

Country Status (1)

Country Link
GB (1) GB533551A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2010170C2 (en) * 2012-06-22 2013-12-24 Steinar Holding B V LANTERN WITH SECURITY AGAINST SHINES IN AN UNWANTED DIRECTION.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2010170C2 (en) * 2012-06-22 2013-12-24 Steinar Holding B V LANTERN WITH SECURITY AGAINST SHINES IN AN UNWANTED DIRECTION.
WO2013191540A1 (en) * 2012-06-22 2013-12-27 Steinar Holding B.V. Lamp with protection against shining in an undesired direction
CN104620048A (en) * 2012-06-22 2015-05-13 斯泰纳控股有限公司 Lamp with protection against shining in an undesired direction
US9458997B2 (en) 2012-06-22 2016-10-04 Steinar Holding B.V. Lamp with protection against shining in an undesired direction
US9657929B2 (en) 2012-06-22 2017-05-23 Steinar Holding B.V. Lamp with protection against shining in an undesired direction
AU2013277898B2 (en) * 2012-06-22 2017-07-20 Bird Control Group B.V. Lamp with protection against shining in an undesired direction
CN104620048B (en) * 2012-06-22 2019-01-11 斯泰纳控股有限公司 Prevent the lamp to shine at an undesired direction

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