公开(公告)号：JP2002101409A

公开(公告)日：2002-04-05

申请号：JP2000290057

申请日：2000-09-25

Applicant: TOA CORP

Inventor： YOSHIKAWA SUSUMU

IPC: G06F3/14 ,  H04N5/765 ,  H04N7/18

Abstract: PROBLEM TO BE SOLVED: To provide an image recording system that can sequentially record image signals from all slave stations for a period when a monitor displays an image from one slave station. SOLUTION: A master station 5 selectively displays and records image signals sent form the slave stations to the master station 5. The master station 5 sequentially designates one of the slave stations. The designated slave station transmits an image signal to the master station 5 and while a monitor 51 of the master station 5 displays the image signal sent from the designated slave station, the master station 5 sequentially designates the slave stations (1), the designated slave station transmits the image signal to the master station 5(2), and a recording section 54 of the master station 5 sequentially records the image signal sent form the designated slave station (3).

公开(公告)号：JP2002034099A

公开(公告)日：2002-01-31

申请号：JP2000216168

申请日：2000-07-17

Applicant: TOA CORP

Inventor： YOSHIKAWA SUSUMU ,  ASAYAMA SHIRO

IPC: H04R25/00 ,  H04B5/02

Abstract: PROBLEM TO BE SOLVED: To provide a receiver, in which the existence of a magnetic induction device driven by a sound signal, cannot be sensed only by its external appearance. SOLUTION: Radio waves which are received by an antenna 1, used to receive the radio waves modulated by the sound signal, are amplified and demodulated, and an original low-frequency signal is extracted. The low-frequency signal is amplified by low-frequency amplifiers 31, 32, to be supplied respectively to an external output terminal 4 and the magnetic induction device 7. An earphone can be connected to the terminal 4, and the device 7 is built into the receiver 100, to be magnetically coupled to the induction loop and the induction coil of a hearing aid.

公开(公告)号：JP2001103535A

公开(公告)日：2001-04-13

申请号：JP27789899

申请日：1999-09-30

Applicant: TOA CORP

Inventor： YOSHIKAWA SUSUMU ,  TOMORI JIYUNJI

IPC: H04B17/40 ,  H04B7/26 ,  H04W16/26 ,  H04W84/08 ,  H04Q7/28 ,  H04B17/02

Abstract: PROBLEM TO BE SOLVED: To provide a radio communication system that can continue relaying when a radio wave arrived after interruption of a radio wave over a prescribed period is not a radio wave for a channel setting procedure. SOLUTION: A repeater discriminates whether or not a radio wave received after interruption of a radio wave from a slave set over a prescribed period is a radio wave for a channel setting procedure and continues the relaying when the repeater discriminates that the radio wave is not the radio wave for the channel setting procedure. Thus, the repeater is provided with a 1st discrimination means S4 that discriminates whether or not the radio wave from the slave set is interrupted over a prescribed period, a 2nd discrimination means S7 that discriminates whether or not the radio wave received after the interruption of the radio wave is the radio wave for the channel setting procedure in response to the result of the 1st discrimination means, and a speech continuing means S5 that continues the relaying in response to the 2nd discrimination means.

公开(公告)号：JPH04165827A

公开(公告)日：1992-06-11

申请号：JP29324090

申请日：1990-10-30

Applicant: TOA CORP

Inventor： YOSHIKAWA SUSUMU

IPC: H04B5/04 ,  H04B7/26 ,  H04B17/00 ,  H04B17/30 ,  H04M1/00 ,  H04W4/16 ,  H04W84/02 ,  H04W88/02

Abstract: PURPOSE:To make the measurement of the reaching distance of an informing signal from a radio equipment easy, and to shorten a measuring time by providing a starting circuit besides an informing signal transmitting part transmitting the informing signal, starting the informing signal transmitting part at an operating time, and transmitting the informing signal at a prescribed interval. CONSTITUTION:Normally a test switch 25 is turned off. In this state, the operator of the radio equipment brings a receiver 30 receiving the informing signal when leaving a vehicle. Now, for example, if someone takes out a main body 10 of the radio equipment without permission, the main body 10 of the radio equipment transmits a signal to a robbery detecting circuit 21, and the robbery detecting circuit 21 is operated. The operation of the robbery detecting circuit 21 is detected by a control circuit 22, and the transmitting circuit 23 is operated then the informing signal is transmitted. The transmitted informing signal is received in a receiver 30, and since the receiver 30 calls out an alarm signal corresponding to this, the operator can know the danger of the robbery of the main body of the radio equipment.

公开(公告)号：JPH04157949A

公开(公告)日：1992-05-29

申请号：JP28508590

申请日：1990-10-22

Applicant: TOA CORP

Inventor： YOSHIKAWA SUSUMU

IPC: H01L41/08 ,  H03H9/54 ,  H04M1/21

Abstract: PURPOSE:To make the size of the acoustic coupler small by using a 1st piezoelectric element converting an inputted electric signal into vibration and a 2nd piezoelectric element converting the vibration into an electric signal. CONSTITUTION:When an electric signal of a prescribed frequency is inputted to a piezoelectric element 10 via a lead wire 13, the element 10 is vibrated and when the signal is delivered to a metallic plate 21 via a metallic plate 11 and a rubber 30, a voltage with a same frequency as that of the input electric signal is generated and outputted through a lead wire 23. Thus, the low frequency characteristic is much improved. This is because the vibration caused by the element 10 is delivered to an element 20 not through air, the coupling loss is much reduced. Furthermore, since the size of the elements 10,20 is small and the space required acoustically is not required, the entire coupler is made small.