GB191224960A - Improvements in or connected with Apparatus for Periodically Testing Electric Currents. - Google Patents

Improvements in or connected with Apparatus for Periodically Testing Electric Currents.

Info

Publication number
GB191224960A
GB191224960A GB191224960DA GB191224960A GB 191224960 A GB191224960 A GB 191224960A GB 191224960D A GB191224960D A GB 191224960DA GB 191224960 A GB191224960 A GB 191224960A
Authority
GB
United Kingdom
Prior art keywords
circuit
electro
magnet
battery
signalling
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
Inventor
Charles Smith
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
Application granted granted Critical
Publication of GB191224960A publication Critical patent/GB191224960A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/14—Indicating direction of current; Indicating polarity of voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)

Abstract

24,960. Smith, C. Oct. 31. Automatic alarm signals.-In apparatus for periodically testing a battery used in a fire alarm or other circuit, a clock closes the battery circuit through an electro-magnet, which controls a mechanically-operated signal indicating when the current given by the battery is below normal. In the arrangement shown, a clockdriven disk 1 has a contact 2 engaging with two contacts 4 to close the circuit of the battery through an electro-magnet 10. The disk is also formed with a cam surface 3 engaging with a roller on the armature 11 of the electro-magnet. If the current is normal, the armature is held up when the gap 18 in the cam surface reaches the roller, but if below normal, the roller falls into the gap, and a lug 14 on the armature releases a weight or spring to operate a visible or audible signal. Specification 21,059/06, [Class 40, Electric telegraphs &c.], is referred to. According to the Provisional Specification, the electro-magnet may control an auxiliary electric signalling-circuit. In this case the clock-driven disk has two contacts engaging with two separate pairs of spring contacts to close first the battery circuit and then the signalling-circuit. If the current is normal, the electro-magnet opens the signalling-circuit, but if below normal the signalling-circuit is closed by the disk contact, and a bell is sounded or a visible signal is operated.
GB191224960D 1912-10-31 1912-10-31 Improvements in or connected with Apparatus for Periodically Testing Electric Currents. Expired GB191224960A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191224960T 1912-10-31

Publications (1)

Publication Number Publication Date
GB191224960A true GB191224960A (en) 1913-10-09

Family

ID=32574414

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191224960D Expired GB191224960A (en) 1912-10-31 1912-10-31 Improvements in or connected with Apparatus for Periodically Testing Electric Currents.

Country Status (1)

Country Link
GB (1) GB191224960A (en)

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