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Posted 1 year ago

nwclocks
(7 items)

Here is a few pictures of an O.B. McClintock master clock that ran the outside clocks and chimes. Removed from old bank building in Hoquiam Washington (see photo) before demolition in the 1960s. I have this one running as a time keeper only. It's ready for full duty if ever called upon.
thanks for looking!
George

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Regulator ClocksRegulator clocks, sometimes referred to as pendulum clocks, were invented i…

Comments

1. officialfuel, 1 year ago
   Outstanding George!
   
   Michael
2. Bruce99, 1 year ago
   Hi George,
   
   I recall you cited an NAWCC article in your original posting and I still intend to look that up when the opportunity presents itself, but could you explain how the master clock controls the main clock? I have a bunch of other questions but I'll defer those unless the article doesn't answer them first, then I'll bug you some more! :D
3. nwclocks, 1 year ago
   Well where to start, first the clock has 2 movements the upper is a highly modified large Seth Thomas 8 day movement that is at the heart of all functions.. As the clock runs it impulses the outside slave movements on 1 minute intervals via a mercury ring that rocks or tips just enough to close the 12 volt circuit actuating the electro-magnetic coils in the slaves which work in the same manner as most any other type of slave although unique in design and larger than most. Every qtr. hour the upper clock movement lifts a rod that activates the chime movement. It's the lower movement with commutator drum on the front. When the chime movement is activated it rotates the commutator drum similar to a music box or clock chime except that instead of lifting hammers the commutator has brass tabs that touch corresponding metal fingers that complete or close the circuit to actuate one of the outside chime mechanism hammers. Just like a chime clock the commutator or chime drum will make a full rotation every hour. After completing the fourth quarter chime sequence the lower movement lifts another rod which releases the hour count wheel on the upper movement just like most any Americen style movement except that instead of lifting a hammer it rotates a small disc which has a contact finger or pin that in turn makes contact once per hour strike closing the circuit for the hammer of longest tubular chime. Dc Power is to run all this is supplied via a McClintock power supply (9 1-1/2 volt dry cell batteries contained in a steel box with built in charger volt a milli amp meters and on off switch.
   there are also knife switches to open the slave clock circuits individually in order to synchronize all dials. a mother of pearl impulse button to advance outside clock dials (advanced them 60 times today for daylight savings). A cam operated switch that runs off the hour gear that opens the chime circuit to sinence them at night and manual on off stitch for the chimes so you don't wet your pants when changing a light bulb. There is also much more to it but this should give you a bit of insight.
   regards
   George
   
4. Bruce99, 1 year ago
   Very nice explanation. That's much more detailed than I expected in this limited forum but I can visualize most of what you've described. No doubt the article will have an illustration/photo or two. Thanks for taking the time to explain the mechanical-electro applications of this giant early twentieth century advertising clock. Nice touch with the "stained glass" panels in place of the bank name too. Regards
5. nwclocks, 1 year ago
   Thanks Bruce, Yes the article has several illustrations and is much more detailed than my off the fly description. I had to teach myself stained glass to do these panels 156 pieces of glass each panel. They are a rendition of a Frank Lloyd Wright design from 1901 . I looked at many designs but kept coming back to this one as it went well with the design of the copper case.
   George

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