Adapter for mounting a portable telephone on a vehicle
First Claim
1. An adaptor for selectively mounting on a vehicle a simple handset having an open handset detecting terminal and a multi-function handset having a handset detecting terminal connecting to ground and a power switch terminal connecting to a power switch, said handset forming a part of a portable telephone system, said adapter comprising:
- a handset detecting line connected to the handset detecting terminal;
a power switch connecting line connected to the power switch terminal;
power feeding line for feeding power to the portable telephone system;
switching means for switching supply of power to said power feeding line on and off;
flip-flop means being set when said hand-set detecting line is opened and inverted by an input to said power switch connecting line when said handset detecting line is connected to ground; and
AND means for feeding a control signal to said switching means by ANDing an ignition ON state of the vehicle and an output of said flip-flop means.
2 Assignments
0 Petitions
Accused Products
Abstract
An adapter for mounting a portable telephone on a vehicle allows either one of a simple handset and a multi-function handset to be used therewith as desired. The adapter does not need a power switch and associated circuitry and, therefore, reduces the overall weight and size of a portable telephone system. When a multi-function handset is used with the adapter, the adapter is switched on and off by a power switch which is provided on the handset. When a simple handset is used with the adapter, the adapter is switched on and off by an ignition switch which is provided on the vehicle. Further, the adapter promotes easy and convenient use of a handset because it automatically adapts itself to both of a multi-function handset and a simple handset.
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Citations
4 Claims
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1. An adaptor for selectively mounting on a vehicle a simple handset having an open handset detecting terminal and a multi-function handset having a handset detecting terminal connecting to ground and a power switch terminal connecting to a power switch, said handset forming a part of a portable telephone system, said adapter comprising:
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a handset detecting line connected to the handset detecting terminal; a power switch connecting line connected to the power switch terminal; power feeding line for feeding power to the portable telephone system; switching means for switching supply of power to said power feeding line on and off; flip-flop means being set when said hand-set detecting line is opened and inverted by an input to said power switch connecting line when said handset detecting line is connected to ground; and AND means for feeding a control signal to said switching means by ANDing an ignition ON state of the vehicle and an output of said flip-flop means. - View Dependent Claims (2, 3, 4)
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Specification