Group response and indication system
First Claim
1. A group response system, comprising:
- a plurality of response transmission units each having a switch means for manually selecting one of a plurality of possible responses;
a response memory having a plurality of memory elements equal in number to the number of response transmission units, the response memory unit comprising sensing means to normally inhibit the input of the response memory unit, sense a condition in which the switch means of one of the response transmission units is manually actuated to select a new response and enable the input of the response memory unit to enter the new response into the respective memory element, the sensing means comprising a parity generator;
a transmission line means, the output of the response transmission units being connected in parallel to one end of the transmission line means, the other end of the transmission line means being connected to the input of the response memory unit; and
a scanning means operative to synchronizingly scan the response transmission units to sequentially actuate the response transmission units to transmit their respective responses to the response memory unit through the transmission line means and actuate the response memory unit so that the respective responses are stored in the respective memory elements.
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Abstract
A system is provided whereby each person in a group is provided with a response unit comprising push buttons to indicate a response or answer selected from a plurality of possible answers to a question from an interrogater. A memory and indicator unit is provided to store and indicate the responses. The response units are connected in parallel to the memory unit through a unitary transmission line. The response units also comprise indicator light units to indicate the respective responses as stored in the memory unit, all of the indicator light units being connected in parallel to the memory unit through a unitary response line which may be integral with the transmission line. Scanning means sequentially scan the push buttons of the respective response units, the memory units and the indicator light units of the response units in synchronism. An absentee memory unit is also provided to indicate unused response units.
11 Citations
18 Claims
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1. A group response system, comprising:
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a plurality of response transmission units each having a switch means for manually selecting one of a plurality of possible responses; a response memory having a plurality of memory elements equal in number to the number of response transmission units, the response memory unit comprising sensing means to normally inhibit the input of the response memory unit, sense a condition in which the switch means of one of the response transmission units is manually actuated to select a new response and enable the input of the response memory unit to enter the new response into the respective memory element, the sensing means comprising a parity generator; a transmission line means, the output of the response transmission units being connected in parallel to one end of the transmission line means, the other end of the transmission line means being connected to the input of the response memory unit; and a scanning means operative to synchronizingly scan the response transmission units to sequentially actuate the response transmission units to transmit their respective responses to the response memory unit through the transmission line means and actuate the response memory unit so that the respective responses are stored in the respective memory elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification