Multiple rate meter
AssigneeWestinghouse Electric Corp.
InventorsCarl J. Snyder, Milton Blick
Life of this patent
Estimating the term…
Abstract
A multiple rate meter for totalizing electrical power usage from an alternating current supply, including a rotatable member which rotates at a speed proportional to the rate of power usage, and solid state circuitry which times the speed of the rotatable member versus the supply frequency. The electrical power usage is totalized in a first manner when the speed of the rotatable member is below a predetermined magnitude, and in a second manner when the speed reaches the predetermined magnitude.
Claims13
a multiple rate meter system for totalizing electrical power usage of electrical energy supplied to a load, comprising:
- first means producing pulses spaced in time proportional to the rate of usage of the electrical energy, wherein each pulse represents a prededetermined quantity of electrical energy and successively reoccurring groups of identical numbers of said pulses each represent a corresponding larger quantity of electrical energy,
- second means initiating time signals defining a predetermined timing period in response to a first pulse of each of the pulse groups produced by said first means, said predetermined timing period corresponding to a predetermined value of kilowatt power usage directly related to the time intervals of said pulses,
- and third means responsive to said first pulse of said first means and said time signals of said second means, said third means including totalizing means for totalizing the power usage in a first predetermined manner when the time between said first pulse and a predetermined subsequent pulse in each of the pulse groups produced by said first means exceeds said predetermined timing period, and totalizing in a second predetermined manner when the time between the first and subsequent pulses does not exceed said predetermined timing period.
A multiple rate meter system for totalizing electrical energy usage from source of alternating current electrical power, comprising:
- a meter device including a rotatable member which rotates at a rate proportional to the rate of electrical energy usage,
- timer means producing timing pulses controlled by the frequency of the alternating current electrical power,
- pulse generating means producing meter pulses responsive to a predetermined angle of rotation of said rotatable means,
- pulse counter means responsive to said timing pulses for producing initial and terminating timing signals establishing a predetermined timing period corresponding to a predetermined number of said timing pulses occurring during a predetermined angle of rotation of said rotatable member at a given value of kilowatt power usage of the alternating current electrical power, said pulse counter means being responsive to each pulse produced by one of a plurality of predetermined angles of rotation to periodically produce said initial timing signals,
- logic circuit means responsive to said meter pulses and said terminating timing signals to establish either of two logic states;
- and
- totalizing means controlled by the logic states of said logic circuit means for totalizing the power usage in a first predetermined manner when said predetermined timing period expires before the rotatable member rotates through said predetermined angle to establish one of the logic states, and totalizing in a second predetermined manner when the rotatable member rotates through said predetermined angle before the end of said predetermined timing period to establish an opposite logic state.
Dependencies are inferred from the claim text.