Test device for blood pressure monitor
First Claim
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1. A device for testing the operability of a blood pressure monitor, said device comprising:
- generator means for selectively generating a plurality of output signals, each output signal having a different signal level corresponding to preselected static blood pressure levels for testing the operability of the blood pressure monitor;
a plurality of display devices, each device corresponding to one of the preselected static blood pressure levels;
a push button switch;
control means coupled to said switch, said generator means, and to said display devices, said control means providing control signals operative for simultaneously selecting a different blood pressure level output signal for generation by said generator means and for energizing its corresponding display device upon each sequential activation of the switch.
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Abstract
A device for testing the operability of a blood pressure monitor. The device includes a signal generator for generating a plurality of different output signals simulating a variety of static blood pressure levels. A plurality of display devices are included, each device corresponding to one of the given static blood pressure levels. Control circuitry coupled to a single push button switch simultaneously selects a different blood pressure level to be generated and energizes its corresponding display device upon each sequential activation of the switch.
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Citations
15 Claims
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1. A device for testing the operability of a blood pressure monitor, said device comprising:
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generator means for selectively generating a plurality of output signals, each output signal having a different signal level corresponding to preselected static blood pressure levels for testing the operability of the blood pressure monitor; a plurality of display devices, each device corresponding to one of the preselected static blood pressure levels; a push button switch; control means coupled to said switch, said generator means, and to said display devices, said control means providing control signals operative for simultaneously selecting a different blood pressure level output signal for generation by said generator means and for energizing its corresponding display device upon each sequential activation of the switch. - View Dependent Claims (2, 3)
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4. In a device for testing the operability of a blood pressure monitor, said device including a bridge network having a plurality of the resistive legs, an input coupled to an excitation signal from the blood pressure monitor, and an output coupled to the blood pressure monitor for supplying signals to the monitor for testing its operability, the improvement comprising:
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a plurality of resistors having one of their ends commonly coupled to one node of the bridge network; multiplexer means having a plurality of outputs, each of said outputs being coupled to the other end of separate ones of said resistors, said multiplexer means having an input coupled to an adjacent node of said bridge network, and said multiplexor means having control inputs operative to selectively couple one of said outputs to said input thereby selectively coupling one of said resistors across the bridge leg bounded by said nodes, said resistors having different resistive values such that the output of said bridge network provides a plurality of different static blood pressure levels to the monitor for testing the operability thereof; a plurality of display devices, each device associated with one of the resistors for generating a given static blood pressure level; decoder means having a plurality of outputs, each output coupled to one of said display devices, said decoder means having a control input for selecting one of said outputs for activating its associated display device; a single manually selectable push button select switch; and control circuit means coupled between the switch and the control inputs of both said multiplexer and said decoder means, operative to successively select one of said resistors and simultaneously activate the display device associated with the static blood pressure level generated by the selected resistor upon each sequential activation of the switch. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Electrical circuitry for initializing and incrementing a counter upon sequential activation of a single push button switch, said circuitry comprising:
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a single push button switch; a potential source; a power switch having an input coupled to the potential source and an output; a first flip flop having set and reset inputs coupled for sequential receipt of power from said source upon each activation of said push button switch thereby setting and resetting said first flip flop, said first flip flop having an output; a second flip flop having a set input coupled to the output of the first flip flop, said second flip flop having an output; counter means having a clock input for incrementing the count signal output of said counter means, said counter having a reset input for resetting the count signal, and a power input coupled to the output of said power switch for controlling power to the counter means; means for coupling the output of said second flip flop to the power switch, operative to enable said power switch on the first activation of said selector switch; delay means coupled to the output of said power switch, operative to provide a reinitializing signal to the reset input of the counter means until a given time period has elapsed from power being initially applied to the counter means; and gating means coupled to the output of said delay means and to the output of said first flip flop, operative to increment the count signal in said counter by providing a pulse to said clock input of the counter means upon each subsequent sequential activation of said selector switch. - View Dependent Claims (15)
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Specification