Cellular phone jammer that permits cellular communication in an emergency

• US 7,505,730 B2
• Filed: 12/19/2005
• Issued: 03/17/2009
• Est. Priority Date: 11/01/2005
• Status: Expired due to Fees

• Current Assignee: Dennis Huang
• Original Assignee: Dennis Huang
• Inventors: Huang, Dennis
• Primary Examiner(s): Nguyen; Tu X
• Application Number:
  US11/303,979
• Publication Number:
  US 20070099559A1
• Time in Patent Office: 1,184 Days
• Field of Search: 455/1, 455/404.1, 455/571, 455/572, 455/127.1, 455/298, 455/343.1, 455/127, 455/343
• US Class Current: 455/1
• CPC Class Codes: H04K 2203/16 for telephony
• CPC Class Codes: H04K 3/41 characterized by the control of the jamming activation or deactivation time control of jamming activation and deactivation time only for the purpose of alternating between jamming mode and target monitoring mode H04K3/45
• CPC Class Codes: H04K 3/42 characterized by the control of the jamming frequency or wavelength
• CPC Class Codes: H04K 3/45 characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"
• CPC Class Codes: H04M 1/72418 for supporting emergency services
• CPC Class Codes: H04M 1/72463 to restrict the functionality of the device
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention is related to a cellular phone jammer permitting cellular phones to be used in an emergency, and includes a cellular phone signal-obstructing apparatus and an alarm apparatus. The cellular phone signal-obstructing apparatus further has a cellular phone signal-blocking unit, a power supply unit, and a trigger unit. The cellular phone signal-blocking unit sends out a blocking-signal to disconnect the communication between cellular phones and cellular tower within the effective range. The trigger unit connects to the power supply unit and cellular phone signal-blocking unit in series. The invention effectively disconnect the communication between the cellular phones and cellular tower within a range, yet automatically turns off the jammer when there is an emergency in the designated area to resume normal communication between cellular phones and cellular tower so that the users can call for help.

Claims

1. A cellular phone jammer permitting cellular phones to be used in an emergency within a designated area, comprising:

a cellular phone signal-obstructing apparatus, including;

a cellular phone signal-blocking unit which sends out a blocking-signal that occupies a frequency channel to disconnect the communication between cellular phones and cellular tower within an effective range;

a power supply unit which provides required power to the cellular phone signal-obstructing apparatus; and

a trigger unit which connects to the power supply unit and cellular phone signal-blocking unit in series; and

an alarm apparatus which is coupled with the cellular phone signal-obstructing apparatus;

wherein the trigger unit immediately disconnects the power supply unit and the cellular phone signal-blocking unit when the alarm apparatus actuates the trigger unit of the cellular phone signal-obstructing apparatus, thereby resuming normal functions of the cellular phones.

2. The cellular phone jammer as claimed in claim 1, wherein the trigger unit of the cellular phone signal-obstructing apparatus further comprises a timer switch which sets the disconnecting duration of the trigger unit.

3. The cellular phone jammer as claimed in claim 1, wherein the cellular phone signal-obstructing apparatus further comprises a remote control unit.

4. The cellular phone jammer as claimed in claim 1, wherein the alarm apparatus comprises a fire detector.

5. The cellular phone jammer as claimed in claim 1, wherein the alarm apparatus and the trigger unit further comprise a transmission port respectively.

6. The cellular phone jammer as claimed in claim 1, wherein the alarm apparatus connects to the trigger unit of the cellular phone signal-obstructing apparatus.

7. The cellular phone jammer as claimed in claim 6, wherein the alarm apparatus is directly connected to the trigger unit of the cellular phone signal-obstructing apparatus via a transmission line.

8. The cellular phone jammer as claimed in claim 1, wherein the operating frequency band of the said cellular phones is selected from at least one of the following:

800 MHz, 900 MHz, 1800 MHz, 1900 MHz, and 2100 MHz.