1978-10-16
1980-03-25
Hum, Vance Y.
G09B 706
Patent
active
041943023
ABSTRACT:
An answer-spotting electric instrument which is provided with a counter so as to totalize the number of correct answers. The answer-spotting electric instrument having the counter is of the type which is provided with a pair of adjoining terminal members, an electric circuit formed between said terminal members and a signalling device connected to the electric circuit. In using the instrument, the correctness of an answer is recognized by bringing the pair of the terminal members into contact with an answer marking which is made of an electro-conductive material when the answer is correct. The counter of the answer-spotting electric instrument has a counter button to add necessary numbers one by one, a numerical indicator to display the counted number and a reset lever to return the indicated number to zero.
REFERENCES:
patent: 2546666 (1951-03-01), Fleischer
patent: 3141243 (1964-07-01), Chapman et al.
patent: 3177595 (1965-04-01), Yonker et al.
patent: 3509643 (1970-05-01), Kane
patent: 3541706 (1970-11-01), Shapiro
patent: 3774318 (1973-11-01), Sterriti
patent: 3835553 (1974-09-01), Kirton et al.
patent: 4115931 (1978-09-01), Futhey
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