Electromagnetic plunger drop timer

Details Electromagnetic plunger drop timer Electromagnetic plunger drop timer

1979-05-15

1981-05-26

Smith, Alfred E.

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

324178, 328129, G04F 800, G04F 1000

Patent

active

042700868

ABSTRACT:
The time of travel of an electromagnetic rapping device plunger is measured between two predetermined points so that the height of lift of the plunger and the terminal velocity can be determined.

REFERENCES:
patent: 2409672 (1946-10-01), Fischer et al.
patent: 2482184 (1949-09-01), Hoffman et al.
patent: 3567951 (1971-03-01), Montgomery et al.
patent: 4031373 (1977-06-01), Beckwith

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