Questionee{3 s response-detecting device

Claim 1

A questionee''s response-detecting device for YES, NO and NO RESPONSE answers including a main circuit comprising: a DC power source; a questioner''s changeover switch means having a plurality of selectable pairs of terminals therein; a first pair of leads connected to a first pair of said terminals and connecting said DC power source in series with said questioner''s switch means, said leads having current flowing therein in a predetermined direction when said main circuit is energized; questionee answer selection circuit means; a second pair of lead connected respectively to second and third pairs of said terminals and connecting said questioner''s switch means in series with said questionee circuit means to complete said main circuit whereby current selectively flows in either one or the opposite direction through said second pair of leads and said questionee circuit means; said questioner''s switch means comprising a double throw switch having two elements movable in unison 5, said second or third pairs of terminals, alternatively; said questionee circuit means comprising a plurality of selection circuits each connected between said second pair of leads and connected in parallel with each other; each selection circuit comprising a series connection of an energizable lamp, an audio receiving means and a selection switch means, said selection switch means comprising a pair of rectifiers connected in parallel with each other and each adapted to pass current in an opposite direction with respect to each other, each said rectifier connected to a contact, and a switch element being selectively movable to one of said contacts to allow current to pass through one of said rectifiers in its respective direction; and audio-transmitting means connected to one of said second pair of leads and transformer coupled to said audio-receiving means to send a signal thereto when the main circuit is energized; said double-throw switch selectively positioned at one of said second and third pairs of terminals to determine the current flow in one of the directions through said second pair of leads and questionee switch means, said current flow provided in said main circuit by selectively positioning said questionee switch element at one of said contacts to allow current to flow through one of said rectifiers in the same one direction thereby indicating one of the YES and NO answers and simultaneously energizing said lamp and said audio-receiving means, and said questionee switch element selectively positionable between said contacts to prevent current flow in the main circuit whereby the lamp is deenergized indicating a NO RESPONSE answer.