SAFETY ALARM SYSTEM USED

Brand Owner Address Description
D-TEC WILL-BURT COMPANY, THE Orrville OH safety and alarm system used with telescoping masts comprised of overhead line detector and spotlight for use in spotting overhead obstructions;D TECH;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. The present invention provides a burglar alarm system capable of accurately discriminating an alarm from a disturbance noise approximate to the alarm such as background music, ambient noises, etc. In a burglar alarm system comprising an alarm unit attached to an object to be protected from theft to emit an alarm of a particular frequency and an alarm sensor device for issuing an alarm signal upon sensing an alarm from the alarm unit, the alarm sensor device counts a predetermined number of waveform pulses of a received sound (S2, S5) more than once (S1~S3, S4~S6), determines, if it transpires that a differential between counted values falls within a predetermined time range, that the received sound is an alarm and issues an alarm signal (S7).