Electronic survey instrument

Details Electronic survey instrument Electronic survey instrument

1994-04-19

1996-05-21

Cosimano, Edward R.

Boots, shoes, and leggings

33 1T, 33281, 33284, 33285, G01C 102

Patent

active

055196420

ABSTRACT:
An electronic survey instrument is controlled in accordance with a computer program to store a display image and a count value immediately before a power source is cut off. The display image and count values may then be restored without substantial initialization of the electronic survey instrument. The instrument includes a main system for operating in accordance with a survey program, and plural subsystems for operation based on a control signal from the main system. The main system saves information into a memory immediately before a power-off time and restores the information saved in the memory at the next power-on time. End information corresponding to the saved information is also saved into the memory to normally cut-off the power source. An information restoring process is canceled by the main system at the next power-on time when the end information has not been stored in the memory.

REFERENCES:
patent: 3417394 (1968-12-01), Sauberlich
patent: 4327410 (1982-04-01), Patel et al.
patent: 4948138 (1990-08-01), Pease et al.
patent: 4999575 (1991-03-01), Germer
patent: 5291262 (1994-03-01), Dunne

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