Remote control arrangement for a medical appliance
First Claim
1. A remote control arrangement for a medical appliance comprising a transmitter and a receiver associated with at least one appliance, said transmitter having a number of feed-in keys corresponding to the number of the functions of the appliance to be controlled, said feed-in keys combined physically to form a feed-in keyboard for feeding-in binary command signals in the 1-of-n code associated with the functions, a frequency generator having a plurality of inputs controllable as to its frequency by the feeding-in of a code word corresponding to the relevant command signal, and switchable on as a function of the presence of a command signal, and a transmission converter fed by the frequency generator and transmitting frequency signals corresponding to the command signals, and an amplifier having a reception converter and means for selective amplification of the frequency signal received and of their reconversion into the command signals, and said frequency generator being constructed to generate a group frequency signal in addition to the frequency signals corresponding to the command signals as a function of the feeding-in of an additional group code word, said transmitter having an impulse generator which can be set in action as a function of the appearance of a command signal, said impulse generator generating output impulses whereby the group code word can be fed into the frequency generator instead of the code word corresponding to the relevant command signal, and said receiver having a circuit which controls the emission of the command signals as a function of the alternate reception of a frequency signal corresponding to a command signal and of the group frequency signal, said frequency generator being constructed to generate a plurality of additional group frequency signals as a function of the feeding-in of one at a time of a corresponding number of different group code words, said impulse generator having two complementary outputs, and the inputs of said frequency generator being connected each through a diode to an output of the impulse generator so that in a prescribed switching state of the impulse generator the potentials corresponding to the binary values appearing at its outputs are connectable through all the diodes poled in the passage direction with reference to the respective potential in accordance with the respective bits of a prescribed group code word to the inputs of said frequency generator.
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Abstract
In a remote control arrangement for a medical appliance, a transmitter and a receiver are provided. The transmitter has a frequency generator controllable by means of code words which generate frequency signals and a group frequency signal alternately. In order to improve the freedom from interference and ease of changing the frequency of the group frequency signal, the frequency generator is constructed to generate a plurality of additional group frequency signals as a function of the feeding one at a time of a corresponding number of different group code words. An impulse generator of the transmitter has two complementary outputs, and the inputs of the frequency generator are connected each through a diode to an output of the impulse generator so that in a prescribed switching state of the impulse generator the potentials corresponding to the binary values appearing at its outputs are connectable to the inputs of the frequency generator through all the diodes poled in the passage direction with reference to the respective potential corresponding to the respective bits of a prescribed group code word.
51 Citations
11 Claims
- 1. A remote control arrangement for a medical appliance comprising a transmitter and a receiver associated with at least one appliance, said transmitter having a number of feed-in keys corresponding to the number of the functions of the appliance to be controlled, said feed-in keys combined physically to form a feed-in keyboard for feeding-in binary command signals in the 1-of-n code associated with the functions, a frequency generator having a plurality of inputs controllable as to its frequency by the feeding-in of a code word corresponding to the relevant command signal, and switchable on as a function of the presence of a command signal, and a transmission converter fed by the frequency generator and transmitting frequency signals corresponding to the command signals, and an amplifier having a reception converter and means for selective amplification of the frequency signal received and of their reconversion into the command signals, and said frequency generator being constructed to generate a group frequency signal in addition to the frequency signals corresponding to the command signals as a function of the feeding-in of an additional group code word, said transmitter having an impulse generator which can be set in action as a function of the appearance of a command signal, said impulse generator generating output impulses whereby the group code word can be fed into the frequency generator instead of the code word corresponding to the relevant command signal, and said receiver having a circuit which controls the emission of the command signals as a function of the alternate reception of a frequency signal corresponding to a command signal and of the group frequency signal, said frequency generator being constructed to generate a plurality of additional group frequency signals as a function of the feeding-in of one at a time of a corresponding number of different group code words, said impulse generator having two complementary outputs, and the inputs of said frequency generator being connected each through a diode to an output of the impulse generator so that in a prescribed switching state of the impulse generator the potentials corresponding to the binary values appearing at its outputs are connectable through all the diodes poled in the passage direction with reference to the respective potential in accordance with the respective bits of a prescribed group code word to the inputs of said frequency generator.
Specification