Path: utzoo!attcan!uunet!bloom-beacon!think!ames!decwrl!megatest!ivan
From: ivan@megatest.UUCP (Ivan Batinic)
Newsgroups: sci.electronics
Subject: Re: Latching Relay - does such a thing exist
Keywords: relay, latching
Message-ID: <8219@sunspot.megatest.UUCP>
Date: 21 Sep 89 17:20:42 GMT
References: <3558@dgis.daitc.mil>
Reply-To: ivan@sunspot.UUCP (Ivan Batinic)
Organization: Megatest Corporation, San Jose, Ca
Lines: 25


	Yes, there are three types which I am familiar with:

		1) Mechanical "escapement" toggling relays
		2) Toggling relays with builtin transistor-transistor
		   flip-flop	
		3) Biased "hold magnets" within a reed-relay


	I had a pet project which was a 6-instruction CPU (ALL
RELAYS!) which interfaced to real memory and emulated an M6800 running
basic running my 2-half-move look-ahead chess playing program; it was
a real screamer (1 move/4.5 days).

	The relays were either Allen-Bradley, Magna-Latch or
Magna-Craft; It has been quite a while now! So I may not have the
names exactly right.  There are other manufacturers -- look into
relays in a parts-master catalog (latching relays).

	Good luck, they are a dying breed; although the Telephone
companies still use them -- you might try salvage companies who carry
used telephone equipment too.

	Ivan
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