Registers – Transfer mechanism – Traveling pawl
Patent
1974-09-19
1976-08-03
Malzahn, David H.
Registers
Transfer mechanism
Traveling pawl
235154, G06F 302
Patent
active
039731138
ABSTRACT:
An apparatus is disclosed for automatically adding, subtracting, multiplying and dividing feet, inches and fractions of an inch and for the recordation of the results of said arithmetic functions on a visual display. The apparatus also automatically and directly converts feet, inches and fractions of an inch into decimal equivalents and into the metric system of measurement and, similarly, converts numbers in decimal numeric and in metric measurement automatically and directly into feet, inches and fractions of an inch.
REFERENCES:
patent: 3654449 (1972-04-01), Boyce
patent: 3739161 (1973-06-01), Gross et al.
patent: 3809872 (1974-05-01), Yamamura et al.
patent: 3816731 (1974-06-01), Jennings et al.
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