Telephone transmission system on a road-vehicle
First Claim
1. A telephone transmission system on a roadvehicle comprising:
- a dialling control board supporting mechanism mounted on a steering wheel adapted to support a dialling control board in a stationary state relative to the road vehicle irrespective of a rotation of said steering wheel;
a plurality of input key switches including ten key switches and a hook switch, a moudlation circuit and a transmitting control electronic device which are incorporated in said dialling control board;
an electric controller disposed on the road-vehicle at a position mechanically remote from said steering wheel, including a demodulation circuit and a receiving control electronic device and connected to a mobile telephony device on the road-vehicle; and
an electric coupling means adapted to electrically couple said control board and said electric controller.
2 Assignments
0 Petitions
Accused Products
Abstract
Branch telephone connection control signal communication between a dialling control board mounted on a steering wheel but held in a stationary state irrespective of a rotation of the steering wheel and an electric controller disposed at a position remote from a steering mechanism, the electric controller is connected to a mobile telephony device on a road-vehicle. The dialling control board is supported by a steering drive shaft through a toothed wheel mechanism, so that it remains stationary regardless of a rotation of the shaft. The control board and the electric controller are electrically coupled to each other through a combination of slip rings and brushes. The dialling control board and the electric controller each include an FSK modulation circuit, an FSK demodulation circuit and a microprocessor for controlling transmission or reception of the electric signals. Key inputs on the dialling control board are encoded by the dialling control board and then transmitted to the electrical controller. The electric controller decodes the received code and then renders operation instructions to the mobile telephony device. A microphone for driver'"'"'s speaking is equipped on a front panel and connected to the mobile telephony device. In another embodiment, the microphone is equipped on the dialling control board and connected to the mobile telephony device through an electric-magnetic coupling of a pair of electric coils.
48 Citations
16 Claims
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1. A telephone transmission system on a roadvehicle comprising:
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a dialling control board supporting mechanism mounted on a steering wheel adapted to support a dialling control board in a stationary state relative to the road vehicle irrespective of a rotation of said steering wheel; a plurality of input key switches including ten key switches and a hook switch, a moudlation circuit and a transmitting control electronic device which are incorporated in said dialling control board; an electric controller disposed on the road-vehicle at a position mechanically remote from said steering wheel, including a demodulation circuit and a receiving control electronic device and connected to a mobile telephony device on the road-vehicle; and
an electric coupling means adapted to electrically couple said control board and said electric controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification