Measuring and testing – Speed – velocity – or acceleration – With means for retaining reading
Patent
1975-02-28
1976-08-24
Woodiel, Donald O.
Measuring and testing
Speed, velocity, or acceleration
With means for retaining reading
116129H, G01L 716
Patent
active
039759598
ABSTRACT:
A gauge for measuring fluid pressure having a housing containing a dial plate provided with pressure readings thereon, and a pointer to indicate the pressure readings. The pointer is rotated by a cylindrical member connected thereto. The cylindrical member is associated with a plunger against which the fluid pressure is exerted. A coil spring exerts a spring pressure on the plunger for determining movement of the plunger in a linear direction to any one of predetermined positions corresponding to associated fluid pressures. The spring characteristic causes the predetermined positions to be non-proportional to the associated fluid pressures. The plunger is provided with at least one guide groove corresponding to the spring characteristic for relating non-proportional linear positions to radial positions which are proportional to the associated fluid pressures. The cylindrical member is provided with follower projections which are engaged in the guide grooves for rotating the cylindrical member with respect to the radial positions as the plunger is moved in the linear direction so that the pointer is rotated to one of the pressure readings corresponding to the fluid pressure acting against the plunger.
REFERENCES:
patent: 2329039 (1943-09-01), Fenwick
patent: 3177724 (1965-04-01), Trinca
patent: 3523451 (1970-08-01), Kohn
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