Wireless signaling system

• US 4,392,132 A
• Filed: 06/15/1981
• Issued: 07/05/1983
• Est. Priority Date: 06/15/1981
• Status: Expired due to Fees

• Current Assignee: Fleetwood Furniture Company
• Original Assignee: Fleetwood Furniture Company
• Inventors: Derks, Harry G.
• Primary Examiner(s): Robinson, Thomas A.
• Application Number:
  US06/273,374
• Time in Patent Office: 750 Days
• Field of Search: 340/825.69, 340/825.14, 340/825.17, 340/825.44, 340/825.22, 340/825.29, 370/100
• US Class Current: 370/350
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence

Abstract

A wireless signaling between one or more remote locations and a central location includes a transmitter at each remote location and switches for providing signals indicating status information on each remote location. A logic circuit coupled to the switches and to the transmitter provide signals effecting transmission of a signal modulated to uniquely identify the remote location and the status represented by the switches. A receiver at the central location is coupled to a second logic circuit for decoding the signals received from the transmitter and is coupled to indicators for providing an indication of the status at the first location.

Claims

1. A signaling system for indicating status information from one or more remote locations to a central location comprising:

logic circuit means for generating periodic single frequency signals including synchronization signals and a plurality of time intervals for the insertion of data information therein, wherein each time interval bears a predetermined time relationship to said synchronization signal and corresponds to an assigned remote unit and wherein each time interval includes a plurality of discrete data intervals,

at least one remote unit including means for providing status indicating data signals, said providing means coupled to said logic circuit means for the insertion of data during a predetermined data and time interval assigned the remote unit,

a centrally located unit for receiving said data signals and including means for displaying one of a plurality of status conditions of said at least one remote location in response to said data signals.

2. The system as defined in claim 1 wherein said logic circuit means includes a source of clock pulses, counter means coupled to said source for providing digital count signals therefrom, and decoder circuit means coupled to said counter means and responsive to signals therefrom for providing said periodically occurring synchronization signals and pulses occurring to define a plurality of time intervals.

3. The system as defined in claim 2 wherein each remote and central unit includes said logic circuit.

4. The system as defined in claim 3 wherein each of said remote and central units includes a transmitter and a receiver each coupled to associated logic circuit means for the wireless transfer of said data and synchronization signals therebetween.

5. The system as defined in claim 4 wherein said providing means includes switch means movable to indicate two or more status conditions.

6. The system as defined in claim 5 wherein said displaying means includes light emitter indicators for visually displaying status information at said central location.

7. The system as defined in claim 6 wherein said centrally located unit includes switch means coupled to said decoder circuit means for selectively providing information to each of said remote units.

8. The system as defined in claim 7 wherein each of said remote units includes display means coupled to said associated decoder circuit means for visually displaying information from said central location.