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1. AU1995031588 - Improvements to switching systems

Office Australia
Application Number 31588/95
Application Date 15.08.1995
Publication Number 1995031588
Publication Date 26.04.1996
Publication Kind A
IPC
H01H 35/00
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
35Switches operated by change of a physical condition
G01J 9/00
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
9Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
G02F 3/00
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
3Optical logic elements; Optical bistable devices
H01H 19/14
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
19Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
02Details
10Movable parts; Contacts mounted thereon
14Operating parts, e.g. turn knob
H03K 17/78
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
51characterised by the use of specified components
78by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
Applicants Rose, Nigel Eric
Inventors Rose, Nigel Eric
Priority Data PM7431 15.08.1994 AU
PM7432 15.08.1994 AU
Title
(EN) Improvements to switching systems
Abstract
(EN)
A switching system (10) including a first signal emitter (11) and a second signal emitter (13) and a detector or sensor (12) which is adapted to detect or sense the signals. If the signal emitted by the second emitter (13) is 180 degrees out of phase with the signal emitted by the first emitter (11), the signal of the first emitter (11) is effectively cancelled such that no output is provided from the detector or sensor (12).

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