Most visitors online was 1660 , on 12 Dec 2020
Thanks ken for the information and also thanks for taking the time to come to my house to examine the clock.E. Berger Battery clock: The mystery deepens---
Earlier this year Bill Ellison and I had the opportunity to look at this clock and partially disassemble it. In general operation it is much like a Self Winding clock Company product. It uses much the same “Knock Off” once an hour winding arrangement SWCC used. In fact the contacts used to do this- the upper one anyway- look much like those used by the SWCC. The Winding motor is very much like a SWCC three pole motor in its design. An initial test indicated that 3 volts will run it nicely but we need to be able to run it under load to verify same. In just about every other respect it is not the same as a SWCC clock. It uses a deadbeat brocot escapement – the Escape wheel shaft runs through the minute, hour and mainspring barrel. Pinions are a mixture of Lantern and cut steel. The motor and movement are connected by a long spring like those used in old movie projectors. The upper (clock movement) pulley the wind spring runs on is set into a swinging arm arrangement that changes the spring tension as the arm lifts – this arm has an adjustable weight on it along with a long shaft that goes down to the motor where there is a adjustable set of nuts on the shaft to set the limits of the swing arm range of travel. There is no other direct connection between the motor and movement. The anti back up click for the main spring is located in the movement. There is no provision for a set of manual contacts to start the initial spring wind. There is a rather odd provision to “lock” the verge swing using a couple of long screws. The plates and most parts look to be custom made. A further tear down will be needed to see if any of the wind control parts might be the same as SWCC parts. The next step will be to tear the movement and motor down and clean them as they are very dirty. Once running I hope to be able to state just why the swing arm is in there. Currently my best guess is that it is used to set the motor commuter on one or another contact and avoid dead spots- but we shall see. Due to the location of the motor and general “look” of this clock it ought to be something to see it running- particularly when it is winding.
After now owning this electric time piece about 10 months i just paid attention to one detail i never thought of before. The dial itself has no means of sticking a key in it and winding it up. yes i understand its electric, however this dial surely was specially made just for this clock and that the dial was not cobbled from another clock..The longer i own this the more i am realizing how unusual it is..pics
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