Master Clocks

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Below are five master clocks used to control a series of slave clocks or other mechanisms like bells or dynamos. These clocks do not fit into the main part of the collection of tower or skeleton clocks or time locks. However, they still, with the exception of the first two, share the general theme of being able to see the movement works. The first photo is a Telechron Type A from the mid 1930's. Second a rare Telechron Type C, the only complete working example known, and was used in systems that operated in a DC voltage environment. The next photo shows a side-by-side comparison of the Type A and Type C (pendulum not shown on C). The third clock is a Telechron Type E from the early 1930's meant to run in a partial vacuum. Very rare, and only one of five examples known, again this being the only operational one. Fourth a Collin Wagner, 1886, France. A beautiful example of the horological art. Jeweled movement with Wagner's rocking frame remontoire. One of two examples known. Fourth a Hahl pneumatic, 1913 with spring remontoire and extra electrical bell actuating complication. This clock used air pressure rather than electricity to control the slaves. This mechanism is Rube Goldberg device to see in operation.

The Telechron Type A helped bring about the standardization of electrical frequency control throughout the United States allowing for clocks of all types to be controlled by small, cheap synchronous motors which lead to the demise of pneumatic systems like the Hahl in the United States.

Click on the picture to go to a page for more detail.

    Telechron A.jpg (147486 bytes)            Telechron C.JPG (1893278 bytes)   Telechron C (6).JPG (2004218 bytes)            

The complete line up of the Telechron Company's floor standing master clocks, from left: Type A, Type C, and Type E. 

       Hahl.JPG (2126465 bytes) 

Collin_Wagner, Paris, France 1886. Hahl Automatic Clock Co., Chicago, Illinois, c. 1913  

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