Resources Contact Us Home
Automatic-switching wireless communication device

Image Number 12 for United States Patent #7826805.

A base unit and a handset comprise a wireless part, a control part, and a transmission (151) and reception part (150), respectively. Communications are switched by either of the two ways: PTT switching and tone generation in the base unit, and tone detection in the handset or PTT switching in the base unit, and voice detection in the handset. It is preferable that the transmission (151) and reception (150) part of the handset includes a single transducer type headphone. It is also preferable that photo-coupler (41, 43) and a photo-switch (42) are provided at connection point of signal paths between the transmission (151) and reception part (150), the control part, and between the control part and the wireless part.

  Recently Added Patents
Forming agent for gate insulating film of thin film transistor
Jet pump and reactor
Process to increase selectivity to ethylene in oxygenates-to-olefins conversions
Endotracheal tube
Intake parameter-calculating device for internal combustion engine and method of calculating intake parameter
Information processing using batch setting information
  Randomly Featured Patents
Thermal transfer sheet
Catalyst for vapor phase oxidation of n-butane to maleic anhydride
Deposition of TiN films in a batch reactor
Type-based baseband predistorter function estimation technique for non-linear circuits
Closed loop fluid-handling system for use during drilling of wellbores
Near hyperthermic heater wound covering
Quick connect hose assembly
Device for inserting bundles into envelopes
Electrical plug contact
Optical connector device