Radio wave receiving signaling device

• US 6,020,819 A
• Filed: 02/12/1998
• Issued: 02/01/2000
• Est. Priority Date: 07/29/1994
• Status: Expired due to Fees

• Current Assignee: Kubota Corporation
• Original Assignee: Kubota Corporation
• Inventors: Uchida, Kenji, Noma, Yasuhiro, Saito, Yukio, Fujiuchi, Hiroyuki, Takatori, Shigeyoshi, Nakajima, Mitsuhiko, Yao, Masayuki, Okumura, Hisakazu, Saito, Akira
• Primary Examiner(s): Hofsass, Jeffrery A.
• Assistant Examiner(s): Huang, Sihong
• Application Number:
  US09/022,645
• Time in Patent Office: 719 Days
• Field of Search: 340/571, 340/572, 340/568, 340/539, 340/384.6, 340/384.7
• US Class Current: 340/571
• CPC Class Codes: G08B 13/1454 Circuit arrangements thereof
• CPC Class Codes: G08B 13/1463 Physical arrangements, e.g. housings devices to prevent theft or loss of purses, luggage or hand carried bags A45C13/18
• CPC Class Codes: Y10T 70/5004 For antitheft signaling device on protected article

Abstract

A radio wave receiving signaling device includes an antenna (22) having a coil (22a). An electrically capacitive buzzer (21) is activated by alarm output device (AO) to generate sound when the receiving antenna (22) receives a sound generation instructing signal. The buzzer (21) and all or part of the coil (22a) of the receiving antenna (22) are connected to form a booster circuit to raise a voltage to be applied to the buzzer (21) by a resonance function.

Claims

1. A radio wave receiving signaling device comprising:

a radio wave receiving antenna (22) having a coil (22a);

an electrically capacitive buzzer (21);

alarm output means (AO) for activating the buzzer (21) to generate sound when the receiving antenna (22) receives a sound generation instructing signal; and

the buzzer (21) and the entire or part of the coil (22a) of the receiving antenna (22) being connected to form a booster circuit to raise a voltage to be applied to said buzzer (21) by means of a resonance function.