Parity check for turbine meter electronic counting instrumentation or the like

Claim 2

A turbine flow meter comprising: a. a flow tube; b. a rotor assembly, said rotor assembly including a rotor positioned entirely within said flow tube for rotation in response to the flow of a fluid through said flow tube; c. pulse producing means for producing a first set of electrical pulses in response to rotation of said rotor, said pulse producing means including 1. a first set of elements on said rotor within said flow tube, and 2. means responsive to said first set of elements for producing said first set of electrical pulses in response to rotation of said rotor; d. parity check means for producing a second set of electrical pulses in response to rotation of said rotor, the number of pulses produced by said parity check means in response to each revolution of said rotor being a fraction of the number of pulses produced by said pulse producing means in response to each revolution of said rotor, said parity check means comprising 1. a second set of elements on said rotor within said flow tube, said second set of elements including at least one element and fewer elements than said first set of elements, and 2. means responsive only to said second set of elements for producing said second set of electrical pulses in response to rotation of said rotor; e. a first indicator responsive to said first set of electrical pulses; f. a second indication responsive to said second set of electrical pulses.

Claim 3

means responsive to said first set of elements for producing said first set of electrical pulses in response to rotation of said rotor; d. parity check means for producing a second set of electrical pulses in response to rotation of said rotor, the number of pulses produced by said parity check means in response to each revolution of said rotor being a fraction of the number of pulses produced by said pulse producing means in response to each revolution of said rotor, said parity check means comprising

Claim 4

means responsive to said first set of elements for producing said first set of electrical pulses in response to rotation of said rotor; d. parity check means for producing a second set of electrical pulses in response to rotation of said rotor, the number of pulses produced by said parity check means in response to each revolution of said rotor being a fraction of the number of pulses produced by said pulse producing means in response to each revolution of said rotor, said parity check means comprising

Claim 5

means responsive only to said second set of elements for producing said second set of electrical pulses in response to rotation of said rotor; e. a first indicator responsive to said first set of electrical pulses; f. a second indication responsive to said second set of electrical pulses.

Claim 6

means responsive only to said second set of elements for producing said second set of electrical pulses in response to rotation of said rotor; e. a first indicator responsive to said first set of electrical pulses; f. a second indication responsive to said second set of electrical pulses.

Claim 7

The turbine flow meter of claim 1 wherein said first set of elements on said rotor lies generally in a common plane perpendicular to the long axis of said flow tube, said second set of elements comprises an auxiliary element lying out of said plane, said means responsive to said first set of elements comprise a first magnetic sensor, and said means responsive to said second set of elements comprise a second magnetic sensor.

Claim 8

A turbine flow meter of claim 2 wherein said first set of elements and said second set of elements are provided in a shroud part around the periphery of said rotor.

Claim 9

The turbine flow meter of claim 3 wherein said second set of elements comprises a single tab extending downstream from said plane.

Claim 10

A turbine flow meter comprising: a. a flow tube; b. a rotor assembly, said rotor assembly including a rotor positioned entirely within said flow tube for rotation in response to the flow of a fluid through said flow tube; c. pulse producing means for producing a first set of electrical pulses in response to rotation of said rotor; d. indicator means electrically connected to said pulse producing means for displaying a number derived from said first set of electrical pulses; e. first power source means for powering said pulse producing means and said indicator means; f. parity check means for producing a second set of electrical pulses in response to rotation of said rotor, the number of pulses produced by said parity check means in response to each revolution of said rotor being a fraction of the number of pulses produced by said pulse producing means in response to each revolution of said rotor; g. totalizing means electrically connected to said parity check means for storing a number derived from the total number of said second set of pulses over an extended period of time; h. second power source means for powering said parity check means and said totalizing means; i. battery means for providing electrical energy to said parity check means and said totalizing means when said second power source means falls below a predetermined value; and j. means electrically isolating said battery means from said pulse producing means, said indicator means and said first power source means, at least when said secoNd electrical power source falls below said predetermined value.

Claim 11

A turbine flow meter comprising: a. a flow tube; b. a rotor assembly, said rotor assembly including a rotor positioned entirely within said flow tube for rotation in response to the flow of a fluid through said flow tube; c. pulse producing means for producing a first set of electrical pulses in response to rotation of said rotor; d. indicator means electrically connected to said pulse producing means for displaying a number derived from said first set of electrical pulses; e. first power source means for powering said pulse producing means and said indicator means; f. parity check means for producing a second set of electrical pulses in response to rotation of said rotor, the number of pulses produced by said parity check means in response to each revolution of said rotor being a fraction of the number of pulses produced by said pulse producing means in response to each revolution of said rotor; g. totalizing means electrically connected to said parity check means for storing a number derived from the total number of said second set of pulses over an extended period of time; h. second power source means for powering said parity check means and said totalizing means; i. battery means for providing electrical energy to said parity check means and said totalizing means when said second power source means falls below a predetermined value; and j. means electrically isolating said battery means from said pulse producing means, said indicator means and said first power source means, at least when said secoNd electrical power source falls below said predetermined value.

Claim 12

The turbine flow meter of claim 5 wherein said second power source means are electrically connected to said first power source means, said battery means being connected to be charged by said second power source means when said second power source means are energized above said predetermined value.

Claim 13

The turbine flow meter of claim 5 including mounting means for mounting said parity check means and said totalizing means on said flow tube.

Claim 14

The turbine flow meter of claim 5 including electro-optical display means for optically displaying said number stored by said totalizing means, and also including electrical switch means for selectively activating said display means.

Claim 15

The turbine flow meter of claim 5 wherein said pulse producing means comprises a first set of elements on said rotor within said flow tube, and means responsive to said first set of elements for producing said first set of electrical pulses in response to rotation of said rotor; and wherein said parity check means comprise a second set of elements on said rotor within said flow tube, said second set of elements including at least one element and fewer elements than said first set of elements, and means responsive only to said second set of elements for producing said second set of electrical pulses in response to rotation of said rotor.

Claim 16

The turbine flow meter of claim 9 wherein said first set of elements on said rotor lies generally in a common plane perpendicular to the long axis of said flow tube, said second set of elements comprises an auxiliary element lying out of said plane, said means responsive to said first set of elements comprise a first magnetic sensor, and said means responsive to said second set of elements comprise a second magnetic sensor.