CA1136245A - Timed audible alarm system utilizing a piezoelectric transducer - Google Patents

Timed audible alarm system utilizing a piezoelectric transducer

Info

Publication number
CA1136245A
CA1136245A CA000325967A CA325967A CA1136245A CA 1136245 A CA1136245 A CA 1136245A CA 000325967 A CA000325967 A CA 000325967A CA 325967 A CA325967 A CA 325967A CA 1136245 A CA1136245 A CA 1136245A
Authority
CA
Canada
Prior art keywords
condition
audible
electrically coupled
existence
audible signal
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
CA000325967A
Other languages
English (en)
French (fr)
Inventor
Louis P. Sweany
George W. Doyle
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.)
Duracell Inc USA
Original Assignee
PR Mallory and Co Inc
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 PR Mallory and Co Inc filed Critical PR Mallory and Co Inc
Application granted granted Critical
Publication of CA1136245A publication Critical patent/CA1136245A/en
Expired legal-status Critical Current

Links

Landscapes

  • Emergency Alarm Devices (AREA)
CA000325967A 1978-05-01 1979-04-20 Timed audible alarm system utilizing a piezoelectric transducer Expired CA1136245A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US90146178A 1978-05-01 1978-05-01
US901,461 1978-05-01

Publications (1)

Publication Number Publication Date
CA1136245A true CA1136245A (en) 1982-11-23

Family

ID=25414231

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000325967A Expired CA1136245A (en) 1978-05-01 1979-04-20 Timed audible alarm system utilizing a piezoelectric transducer

Country Status (2)

Country Link
CA (1) CA1136245A (es)
MX (1) MX4432E (es)

Also Published As

Publication number Publication date
MX4432E (es) 1982-04-29

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Legal Events

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