Browse Prior Art Database

Remote Multiplexed Load Control

IP.com Disclosure Number: IPCOM000081146D
Original Publication Date: 1974-Apr-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Curtis, SJ: AUTHOR [+3]

Abstract

Referring to the drawing, a positive reference pulse 1P is impressed on the AC power lines. A negative command pulse 2P is subsequently impressed on the power lines. With a predetermined time delay between these pulses, a receiver is implemented which will: 1. Detect at reference pulse detector 3 the positive going reference pulse 1P, and delay it at 4 by a known delay. 2. Detect at command pulse detector 2 the negative going command pulse 2P. 3. Provide through AND 5 a control pulse 3P, only if these two pulses are coincident.

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Remote Multiplexed Load Control

Referring to the drawing, a positive reference pulse 1P is impressed on the AC power lines. A negative command pulse 2P is subsequently impressed on the power lines. With a predetermined time delay between these pulses, a receiver is implemented which will: 1. Detect at reference pulse detector 3 the positive going

reference pulse 1P, and delay it at 4 by a known delay.

2. Detect at command pulse detector 2 the negative going

command pulse 2P.

3. Provide through AND 5 a control pulse 3P, only if these

two pulses are coincident.

By design, the control pulse 3P may occur at any predetermined time within the cycle of the power line. The control pulse 3P is applied to a bipolar silicon- controlled rectifier (SCR) triac 6 in series with the load.

A number of loads (1, 2, ...N), each associated with a discrete receiver (1, 2,
...N) may be independently controlled in this manner. Namely, by making the delay between the reference (positive) and command (negative) pulses 1P, 2P different for each receiver and its associated load.

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