Measuring and testing – Speed – velocity – or acceleration – With means for retaining reading
Patent
1975-12-11
1977-03-15
Woodiel, Donald O.
Measuring and testing
Speed, velocity, or acceleration
With means for retaining reading
73DIG5, 116114K, G01L 708
Patent
active
040117596
ABSTRACT:
A differential pressure gauge of the type comprising a controlling magnetic helix device carrying a pressure indicating arm, the position of which is controlled by a magnet mounted on the free end of a cantilevered leaf spring actuated by a pressure diaphragm exposed to differential pressures. While the helix is preferably of the monoflange or single lobe type, either single or double lobe forms may be employed and they cooperate with a parallelepiped shaped magnet having a planar pole face paralleling the axis of the helix and defining a magnetic axis that is normal to and intersects the helix axis. The magnet and helix are closely spaced, and the magnet is formed from a suitable high energy product type material. The gauge housing defines an integral one piece pressure wall that separates the helix from the magnet and defines within the gauge housing pressure cavity an operating space within which the magnet and its supporting leaf spring are mounted and operate. Between the helix and the magnet the pressure wall is of film dimensions and is contoured to stress in bending.
REFERENCES:
patent: 3373614 (1968-03-01), Neyer
patent: 3645140 (1972-02-01), Phillips et al.
patent: 3862416 (1975-01-01), Phillips et al.
Phillips James W.
Troyer Terrence J.
Dwyer Instruments, Inc.
Woodiel Donald O.
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