GB191002432A - Improved Means for Checking the use of Electric Lighting Apparatus and more particularly of Electric Glow Lamps. - Google Patents

Improved Means for Checking the use of Electric Lighting Apparatus and more particularly of Electric Glow Lamps.

Info

Publication number
GB191002432A
GB191002432A GB191002432DA GB191002432A GB 191002432 A GB191002432 A GB 191002432A GB 191002432D A GB191002432D A GB 191002432DA GB 191002432 A GB191002432 A GB 191002432A
Authority
GB
United Kingdom
Prior art keywords
current
electric
sensitive
indication
duration
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
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.)
FELTEN AND GUILLEAUME LAHMEYER
Original Assignee
FELTEN AND GUILLEAUME LAHMEYER
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 FELTEN AND GUILLEAUME LAHMEYER filed Critical FELTEN AND GUILLEAUME LAHMEYER
Application granted granted Critical
Publication of GB191002432A publication Critical patent/GB191002432A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/30—Repairing or regenerating used or defective lamps
    • H01K3/305—Testing of incandescent lamps

Abstract

2432. Felten & Guilleaume-Lahmeyer Werke Akt.-Ges. Feb. 1, 1909, [Convention date]. Current detectors; current, registering duration of ; indicating-appliances.-An indication that an incandescent or other electric lamp has been used is obtained by utilizing some physical or chemical effect of the passage of current. Material a sensitive to light may be placed in the stem of a lamp, for instance paper coloured with tosul red, or a porous material such as felt, wadding, or cottonwool impregnated with the sensitive material ; or the fusion, vaporization, or expansion of materials may be utilized. The duration of the current is indicated by the degree of discoloration &c., or by several devices of different sensitiveness, such as a series of strips of sensitised paper. The Specification in the original form, as open to inspection under Section 91 (3) (a), comprises also the application of the invention to vacuum tubes and other current - consuming apparatus ; and the use of a magnetic effect of the current to give an indication, and of sulphate of iodine as the light sensitive substance. This subject-matter does not appear in the Specification as accepted.
GB191002432D 1909-02-01 1910-01-31 Improved Means for Checking the use of Electric Lighting Apparatus and more particularly of Electric Glow Lamps. Expired GB191002432A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE191002432X 1909-02-01

Publications (1)

Publication Number Publication Date
GB191002432A true GB191002432A (en) 1910-08-11

Family

ID=32521569

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191002432D Expired GB191002432A (en) 1909-02-01 1910-01-31 Improved Means for Checking the use of Electric Lighting Apparatus and more particularly of Electric Glow Lamps.

Country Status (1)

Country Link
GB (1) GB191002432A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2860302A (en) * 1954-06-28 1958-11-11 Philips Corp Life indicator for high voltage tubes
US2872586A (en) * 1955-08-15 1959-02-03 Jack & Heintz Inc Elapsed time indicator
US3344670A (en) * 1964-12-31 1967-10-03 Ashland Oil Inc Time/temperature integrators
US3520124A (en) * 1969-02-13 1970-07-14 Sumner Myers Timer device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2860302A (en) * 1954-06-28 1958-11-11 Philips Corp Life indicator for high voltage tubes
US2872586A (en) * 1955-08-15 1959-02-03 Jack & Heintz Inc Elapsed time indicator
US3344670A (en) * 1964-12-31 1967-10-03 Ashland Oil Inc Time/temperature integrators
US3520124A (en) * 1969-02-13 1970-07-14 Sumner Myers Timer device

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