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<p>[QUOTE=&quot;afantiques, post: 108135, member: 25&quot;]It is a major component for a timed activation system for lights or other electrical processes.</p><p><br /></p><p>I am assuming the barrel rotates. I assume the clock movement is to drive the barrel. Pins in the barrel (some are visible) would make or break circuits as the slowly rotating barrel brings them past a switch bar. Varying the position of the pins controls the time of activation. It is a simple programming device, mechanical rather than electronic.</p><p><br /></p><p>An example this complicated could be used to control a variable advertising sign, in the pre-computer era. Those signs with moving arrows, etc, had to be operated somehow.</p><p><br /></p><p>I have had smaller but similar devices with impulse control from Pulsynetic and similar master clock systems. There would be commonly used to control school bells to indicate breaks and lesson changes, with possibly 30 bell rings per day.[/QUOTE]</p><p><br /></p>

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