Signals and indicators – Indicators – Magnetically actuated
Patent
1981-11-04
1983-11-22
Yasich, Daniel M.
Signals and indicators
Indicators
Magnetically actuated
73744, 200 84C, 324 74, 324146, 335222, G01D 506, G01D 542
Patent
active
044162111
ABSTRACT:
An easily calibrated indicating device for monitoring pressures or other parameters that vary, comprising a housing having a scale plate with indicia representing a range of values, and an indicating member movable over the scale plate, for designating various values thereon. A driving permanent magnet is movable in the housing, and responds to changes in the parameter being measured. A movable follower permanent magnet is also provided in the housing, for reacting with the driving magnet, the follower magnet in turn being connected to the indicating member so as to shift the same in response to movement of the driving magnet. A third, trim or calibration permanent magnet is provided, which alters the reaction between the first two magnets, thereby enabling either an expansion or else a contraction of the range of movement of the indicator member to be had as it responds to a predetermined change in the condition being measured. A mechanical joint is provided at the connection between the follower magnet and the indicating member, enabling the latter to be relatively shifted so as to obtain a "zero" adjustment independently of the magnetic interactions.
REFERENCES:
patent: 2201836 (1940-05-01), McCune
patent: 3094659 (1963-06-01), Pfeffer
patent: 3140690 (1964-07-01), Siebel
patent: 3429291 (1969-02-01), Hoffman
patent: 3713024 (1973-01-01), Banus
patent: 3867696 (1975-02-01), Raymond
patent: 3927553 (1975-12-01), Frantz
patent: 3998179 (1976-12-01), Dieterich et al.
patent: 4039985 (1977-08-01), Shlesinger, Jr.
patent: 4213110 (1980-07-01), Holce
Lehmann H. Gibner
Lehmann K. Gibner
Yasich Daniel M.
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