ALARM PRESSURE GAUGE Russian patent published in 2009 - IPC G01L7/04 

FIELD: measuring technology.

SUBSTANCE: invention refers to measuring technology, particularly to alarm pressure gauges, wherein tubular spring of Burdon is flexible element sensitive to pressure of medium. The alarm pressure gauge with Burdon spring consists of the first and the second optical pairs with open radiating channels shut down with shutters, of a constant voltage source, of a unit of indicators of maximal and minimal allowed values of medium pressure and of a unit rotating shutters of optical pairs. Additionally, generators of radiation, a light diode and a photo-receiver of optical pairs, the first and the second correspondingly, are connected to a power source via current limiting resistors, while the receivers of radiation,- photo-receivers- correspondingly of the first and second optical pairs, are also connected with their outputs of power to the power source, while their electrical output is tied to a middle point of correspondingly the first and the second inertia elements, the outputs of which are connected to the first and the second controlled switches, the first outputs of which are connected to inverting outputs, while the second ones are correspondingly connected to non-inverting inputs of the first and the second voltage generators, inputs of which are connected correspondingly to the first outputs of relay winding, while the second outputs of the relay are connected to the power source via the resistors.

EFFECT: expanded operational functionality.

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