Showing papers on "Wireless published in 1984"

Long range wireless alarm monitoring system

Abstract: A security system using a remote sensing unit and a transponder in either one-way or two-way radio communication with a central station. The security system provides for the continuous monitoring of remote points in a particular area from a central station without need of physical connections between the central station and the remote points. The security system further provides the added feature of using redundant code comparison to ensure the validity of the transmitted signal.

Automatic sensitivity switching circuit for a cordless telephone

Abstract: An automatically switching circuit for the receiving sensitivity in a cordless telephone comprises a base unit and a portable handset in wireless communication with the base unit, which is responsive to the flow of charging current from the base unit to the portable handset for reducing the gain of an antenna or amplifying stage to a desired low level, thereby preventing erroneous ringing due to surrounding noise signals or disturbances while the portable handset rests on the base unit.

Wireless remote control device

Abstract: PURPOSE:To prevent erroneous recognition by performing input and output by means of a digital code between this control device and a device to be controlled. CONSTITUTION:A voice recognizing section 101 and a voice synthesis section 108 are constituted in the wireless remote control device and the data input and output are performed by using the digital code between this controller and a device 204 such as oil fan heater or the like. Thus, the required band width of a radio frequency is narrowered and even if external noise is generated, the signal is received without an error by providing a redundancy to the digital code in advance.

Holder for a wireless telephone

Abstract: The invention relates to a fixedly arranged station for receiving a cordless phone. The object of the invention is to design such a fixed station that this enables safe storage of the cordless telephone. The object is achieved by a trough-like, the shape of the cordless telephone corresponding recess (2). (Fig.)