Allen-bradley Company, LLC

Harold J Pollnow

Donald J Koneval

Richard J Molus

John E Callan

An enclosure for a transducer includes a cylindrical housing and an end cap covering one end of the housing. A coupling ring engages an annular projection on the one end of the housing and a threaded portion of the end cap to hold the two elements in an abutting relationship. The housing has a threaded aperture therethrough. One of a series of different types of plumbing fittings, each having a common threaded projection, has the threaded projection received in the aperture of the housing. The end cap has a threaded aperture therethrough with one of a series of different types of electrical couplings received therein. Each of the couplings of the series has a common threaded projection which is adapted to mate with the end cap aperture. A set of stops is provided to prevent the end cap and the housing from rotating more than 360 degrees with respect to each other.

Enclosure for electrical sensor

A demand controller includes a microprocessor which is programmed to input data from switches on a control panel and output data to a set of eight circuits which control the operation of loads. Peak power demand is maintained below a preset DEMAND OBJECTIVE by selectively shedding these loads. The shed level for each load is not fixed, but instead, varies as a function of the rate at which total power demand is increasing. This rate is calculated by the microprocessor and the resulting shed level index (i) is employed to select the proper shed level for each load from a stored shed level matrix.

Demand/schedule controller

A solid state equivalent of a relay includes a pair of time delay circuits having inputs which couple to a pseudo coil terminal. One time delay circuit couples to drive a bilateral switch which simulates the operation of a set of normally closed relay contacts and the other time delay circuit is connected in series with an inverter gate and coupled to drive a second bilateral switch which simulates the operation of a set of normally open relay contacts.

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Dousman, WI, United States of America

Harold J Pollnow