Locator paging system with sub kits

• US 5,673,035 A
• Filed: 12/20/1994
• Issued: 09/30/1997
• Est. Priority Date: 12/20/1994
• Status: Expired due to Fees

• Current Assignee: Dennis Huang
• Original Assignee: Dennis Huang
• Inventors: Huang, Dennis
• Primary Examiner(s): Horabik, Michael
• Assistant Examiner(s): WILSON JR, WILLIAM HALL
• Application Number:
  US08/359,896
• Time in Patent Office: 1,015 Days
• Field of Search: 340/825.54, 340/553, 340/573, 340/539, 340/825.44, 340/825.47, 340/311.1, 340/825.72, 340/825.36, 340/825.49, 455/38.2, 455/89
• US Class Current: 340/7.22
• CPC Class Codes: G08B 21/0227 System arrangements with a plurality of child units

Abstract

A locator-paging system including a master kit and a plurality of sub kits, in which the master kit can be actuated to transmit a searching signal to each sub kit, causing every sub kit to transmit an answering signal. The master kit generates a warning signal when at least one sub kit does not transmit an answer back. The master kit can also be actuated to transmit paging signals to the sub kits. As a result, the sub kits are actuated to generate a sound and light alarm when a paging signal from the master kit is recognized. Furthermore, the sub kits can be actuated to transmit a paging signal to the master kit which causes the master kit to generate a sound and light alarm, indicating which sub kit is calling.

Claims

1. A locator-paging system comprising:

(A) a master kit, said master kit comprising;

a microprocessor for signal control and processing;

a first key switch circuit having a plurality of key switches respectively connected to said microprocessor, said first key switch circuit forming a means for controlling a first paging signal output by said microprocessor;

a distance adjustment circuit connected to said microprocessor, said distance adjustment circuit forming a means for controlling a transmitting distance of a searching signal output by said microprocessor;

an encoder to encode said paging and searching signals from said microprocessor;

a first modulator to modulate encoded paging and searching signals into radio frequency signals and then to transmit the modulated radio frequency signals;

a first receiver for receiving second paging signals and answer signals and supplying the received second paging and answer signals to said microprocessor;

means in the form of a first buzzer controlled by said microprocessor to generate a sound signal when either of the following two events occurs;

1.) reception of a second paging signal and 2.) failure to receive an answer signal following transmission of a searching signal; and

a first light emitting device controlled by said microprocessor to generate a light signal when either of said two events occurs; and

(B) a plurality of sub kits, each sub kit comprising;

a receiving/transmitting control circuit for signal control and processing;

a second key switch circuit connected to said receiving/transmitting control circuit, said second key switch circuit forming a means for controlling generation of said second paging signal;

a second receiver to receive said first paging signals and said searching signals from said master kit;

a decoder to decode said first paging signals and said searching signals from said second receiver;

a receiving/transmitting control circuit including means for activating a buzzer and second light upon receipt of one of the first paging signals and for outputting answer signals upon receipt of respective first searching signals;

a second modulator controlled by said receiving/transmitting control circuit to transmit said second paging signals and said answer signals; and

wherein said master kit is operated to send searching signals to said sub kits respectively for tracking said sub kits indicated by the active state of the respective answering signals, the first buzzer and the first light emitting device of said master kit are triggered active respectively when one sub kit generates no answering signal;

said master kit is selectively operated to generate a paging signal to a selected sub kit, causing said selected sub kit to generate a sound and a light indicating the calls from the master kit;

each of the sub kits is selectively operated to generate a paging signal to said master kit, causing said master kit to generate a paging signal to said master kit, causing said master kit to generate a sound and a light indicating which sub kit is calling.

2. The reminder-paging system of claim 1 wherein the first light emitting device of said master kit is comprised of a plurality of light emitting diodes corresponding to said sub kits respectively.

3. The reminder-paging system of claim 1 wherein the number of said sub kits is two.

4. The reminder-paging system of claim 1 wherein the number of said sub kits is three.

5. The reminder-paging system of claim 1 wherein the number of said sub kits is four.