Radio communication apparatus disabled on reception of a predetermined signal

• US 4,639,726 A
• Filed: 08/20/1984
• Issued: 01/27/1987
• Est. Priority Date: 08/18/1983
• Status: Expired due to Term

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Nagata, Koichi, Ishii, Daisuke, Tsunoda, Kazuyuki, Ichikawa, Yoshio, Akahori, Masaaki, Minami, Yohichiro
• Primary Examiner(s): YUSKO, DONALD
• Application Number:
  US06/642,292
• Time in Patent Office: 890 Days
• Field of Search: 340/825.44, 340/825.22, 455/38, 455/58, 455/70, 455/186, 455/217, 358/84, 358/194.1, 358/114, 358/86
• US Class Current: 340/7.41
• CPC Class Codes: G08B 3/1016 using wireless transmission calling systems using transmission by inductive loop H04B5/00
• CPC Class Codes: G08B 5/223 using wireless transmission
• CPC Class Codes: G08B 5/229 with other provisions not elsewhere provided for
• CPC Class Codes: H04W 8/245 from a network towards a terminal
• CPC Class Codes: H04W 88/022 Selective call receivers

Abstract

In a radio communication apparatus comprising a P-ROM (32), a loudspeaker (34), and/or a display unit (36) and carrying out a receiving operation of selectively receiving a call signal specific to the apparatus by the use of an identification number read out of the P-ROM, a predetermined signal to be produced after the call signal is defined to inhibit or disable the receiving operation carried out after reception of the predetermined signal. The loudspeaker may be driven under control of a reception controller (31) to continuously produce an audible signal when the predetermined signal is received. The display unit may also be driven to provide visual displays representative of particular messages conveyed by the predetermined signal. The particular messages may be "lost" and "theft" codes and a telephone number.

Claims

1. A pager receiver comprising:

call signal receiving means for carrying out a call signal reception operation of selectively receiving a call signal specific to said pager receiver;

tone producing means for producing a call tone after reception of said call signal;

resetting means for resetting said call tone after production of said call tone;

additional signal receiving means for carrying out an additional signal reception operation of receiving an additional signal succeeding said call signal;

checking means for checking whether or not said additional signal is identical with a predetermined signal and producing an signal indicating said identity;

means responsive to said identity signal for driving said tone producing means to make said tone producing means continuously produce another tone signal, and to disable said call signal receiving means and said resetting means.

2. A pager receiver comprising:

signal receiving means for carrying our a call signal reception operation of selectively receiving a call signal specific to said pager receiver and of receiving an additional signal which succeeds said call signal and which selectively conveys a normal message and a predetermined message;

display means coupled to said signal receiving means for displaying said normal message;

resetting means coupled to said display means for resetting said normal message displayed on said display means;

checking means coupled to said signal receiving means for checking whether or nor said additional signal conveys said predetermined message;

driving means coupled to said checking means and said display means for driving said display means to make said display means display said predetermined message when said additional signal convey said predetermined message and to make said signal receiving means and said resetting means become disabled.

3. A pager receiver as claimed in claim 2, wherein said additional signal is followed by a subsidiary signal carrying information;

said pager receiver further comprising;

means coupled to said checking means and said display means for making said display means display said information in addition to said predetermined message when said additional and said subsidiary signals carry said predetermined message and said information, respectively, with said signal receiving means and said resetting means kept disabled.

4. A pager receiver comprising:

memory means which is physically detechable from said pager receiver and which can be put into an available or an unavailable state, said memory means being for storing a number signal preassigned to said pager receiver;

call signal receiving means operatively coupled to said memory means for carrying out a reception operation of receiving a call signal identical with said number signal stored in said memory means;

additional signal receiving means for receiving, after reception of said call signal, an additional signal which follows said call signal and which selectively carries a predetermined signal;

checking means coupled to said additional signal receiving means for checking whether or not said additional signal carries said predetermined signal;

destructing means coupled to said checking means for rendering said memory means inoperative when said additional signal carries said predetermined signal by stopping said reception operation so as to put said memory means into said unavailable state until said memory means is exchanged.

5. A pager receiver as claimed in claim 4, further comprising display means coupled to said destruction means for displaying said unavailable state of said memory means.

6. A pager receiver as claimed in claim 4, further comprising tone producing means coupled to said destruction means for producing a tone signal indicative of said unavailable state of memory means.