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CA432730A - Systeme avertisseur - Google Patents

Systeme avertisseur

Info

Publication number
CA432730A
CA432730A CA432730A CA432730DA CA432730A CA 432730 A CA432730 A CA 432730A CA 432730 A CA432730 A CA 432730A CA 432730D A CA432730D A CA 432730DA CA 432730 A CA432730 A CA 432730A
Authority
CA
Canada
Prior art keywords
alarm system
alarm
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
CA432730A
Other languages
English (en)
Inventor
B. Canon Hartman
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.)
GARD-WELL Co
WELLS-GARDNER AND Co
Original Assignee
GARD-WELL Co
WELLS-GARDNER AND Co
Publication date
Application granted granted Critical
Publication of CA432730A publication Critical patent/CA432730A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
CA432730A Systeme avertisseur Expired CA432730A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA432730T

Publications (1)

Publication Number Publication Date
CA432730A true CA432730A (fr) 1946-01-22

Family

ID=210224

Family Applications (1)

Application Number Title Priority Date Filing Date
CA432730A Expired CA432730A (fr) Systeme avertisseur

Country Status (1)

Country Link
CA (1) CA432730A (fr)

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