×

Sign transmitter unit

  • US 7,259,670 B2
  • Filed: 12/19/2005
  • Issued: 08/21/2007
  • Est. Priority Date: 04/09/2003
  • Status: Expired due to Fees
First Claim
Patent Images

1. A transmitter unit for use with a sign and an alarm source, the transmitter unit comprising:

  • a) an alarm detector for detecting an alarm from the alarm source,b) a radio frequency transmitter circuit,c) a transmitter control circuit, andd) a transmitter housing for housing the transmitter circuit and transmitter control circuit,wherein the transmitter control is for recognizing alarms detected by the alarm detector and sending messages to the transmitter circuit in response to a detected alarm, and the transmitter circuit is for transmitting those messages over radio frequencies to the sign, andwherein the alarm detector comprises a telephone decoder for receiving DTMF tones or dial pulses and decoding the DTMF tones or dial pulses into decoded data, and a portion of the transmitter control circuit for receiving the decoded data and determining when an emergency number has been decoded by the telephone decoder.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×