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GB1372646A - Electric hand lamp devices such as hand torches and opthalmoscopes - Google Patents

Electric hand lamp devices such as hand torches and opthalmoscopes

Info

Publication number
GB1372646A
GB1372646A GB4921872A GB4921872A GB1372646A GB 1372646 A GB1372646 A GB 1372646A GB 4921872 A GB4921872 A GB 4921872A GB 4921872 A GB4921872 A GB 4921872A GB 1372646 A GB1372646 A GB 1372646A
Authority
GB
United Kingdom
Prior art keywords
hand
opthalmoscopes
torches
lamp devices
electric
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
GB4921872A
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.)
Gowlland J G
Original Assignee
Gowlland J G
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 Gowlland J G filed Critical Gowlland J G
Priority to GB4921872A priority Critical patent/GB1372646A/en
Publication of GB1372646A publication Critical patent/GB1372646A/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
    • F21L4/08—Electric lighting devices with self-contained electric batteries or cells characterised by means for in situ recharging of the batteries or cells
    • F21L4/085—Pocket lamps

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

1372646 Lamps J E F HOLLEY and J G GOWLLAND 25 Oct 1972 49218/72 Heading F4R [Also in Division H2] A hand lamp such as an opthalmoscope incorporates an electric battery and a mains operated battery charger, the latter comprising a transformer with its primary in series with a multikilohm resistor and its secondary connected to a rectifier feeding the battery.
GB4921872A 1972-10-25 1972-10-25 Electric hand lamp devices such as hand torches and opthalmoscopes Expired GB1372646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4921872A GB1372646A (en) 1972-10-25 1972-10-25 Electric hand lamp devices such as hand torches and opthalmoscopes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4921872A GB1372646A (en) 1972-10-25 1972-10-25 Electric hand lamp devices such as hand torches and opthalmoscopes

Publications (1)

Publication Number Publication Date
GB1372646A true GB1372646A (en) 1974-11-06

Family

ID=10451588

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4921872A Expired GB1372646A (en) 1972-10-25 1972-10-25 Electric hand lamp devices such as hand torches and opthalmoscopes

Country Status (1)

Country Link
GB (1) GB1372646A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2202098A (en) * 1986-12-24 1988-09-14 Dr Richard David Firn Cycle lighting system
US8459844B2 (en) 2010-07-01 2013-06-11 Welch Allyn, Inc. Replacement light assembly
USRE44806E1 (en) 2003-03-20 2014-03-18 Welch Allyn, Inc. Electrical adapter for medical diagnostic instruments using LEDs as illumination sources
US8786210B2 (en) 2010-06-30 2014-07-22 Welch Allyn, Inc. Drive circuit for light emitting diode

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2202098A (en) * 1986-12-24 1988-09-14 Dr Richard David Firn Cycle lighting system
USRE44806E1 (en) 2003-03-20 2014-03-18 Welch Allyn, Inc. Electrical adapter for medical diagnostic instruments using LEDs as illumination sources
US8786210B2 (en) 2010-06-30 2014-07-22 Welch Allyn, Inc. Drive circuit for light emitting diode
US8459844B2 (en) 2010-07-01 2013-06-11 Welch Allyn, Inc. Replacement light assembly
US9198566B2 (en) 2010-07-01 2015-12-01 Welch Allyn, Inc. Replacement light assembly
US9636004B2 (en) 2010-07-01 2017-05-02 Welch Allyn, Inc. Replacement light assembly
US9931028B2 (en) 2010-07-01 2018-04-03 Welch Allyn, Inc. Replacement light assembly

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee