Registers – Transfer mechanism – Traveling pawl
Patent
1975-11-07
1977-02-22
Smith, Jerry
Registers
Transfer mechanism
Traveling pawl
23515111, 318603, 340282, G06F 1520
Patent
active
040093778
ABSTRACT:
The method includes steps for and the apparatus includes means for determining the absolute position of a movable element mounted for movement along a path. The method includes the steps of: developing a pseudo random sequence of indicia which uniquely define the position of the movable element on the path; generating a pseudo random sequence of information bits which correspond to the indicia; reading the pattern of the N indicia at one particular position of the movable element on the path; cycling the generated pseudo random sequence until N bits thereof equal the pattern of N indicia at one particular position of the movable element on the path; and when equality is obtained, generating a logic signal indicating that the pseudo random sequence has been cycled to a position correlated to the absolute position of the movable element on the path. Preferably a counter is cycled in synchronism with the cycling of the pseudo random sequence so that when equality is obtained the counter will contain a number which is indicative of the absolute position of the movable element on the path. The apparatus includes electrical circuits for carrying out the method steps.
REFERENCES:
patent: 3665280 (1972-05-01), Payne et al.
patent: 3668500 (1972-06-01), Kosem
patent: 3676652 (1972-07-01), Millis, Jr. et al.
Smith Jerry
Vigil Thomas R.
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