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Charles Vander Woerd's Patent "Dustproof" Model Watch The train was taken from a late American Grade KW16 gilt movement that had lost its original balance cock and balance. The balance was found in Pat Caruso's spare material from the Waltham Engineering Department. These plates and the other material were given to Pat by the Chief Engineer when the department was shut down in the 1950's.In 1869 Charles Vander Woerd was awarded US Letters Patent No. 95,547 for a completely new watch design. The new watch had a heavy dial plate without pillars with milled out wells to hold the train components. The winding ratchet is inserted into a further recess in the bottom of the mainspring barrel well. Only shafts pass through the watch body to the dial side, so that it can be tightly sealed to the dial side. The back side is a flat plane with thin bridges to hold the top pivots of the train. There is a provision to add a sealing plate to the top with cut outs for the decorative bridges. Bill Tapp finished the assembly and miscellaneous smaller parts. This included making the entire ratchet assembly from the patent drawings and designing and constructing a left handed Fogg's Center Pinion to protect the train from mainspring breakage. The Fogg's mechanism is the reverse of that normally found in Waltham watches because the center wheel is below the barrel in height. The dial and display case are from an 1892 model Waltham and were also supplied by Bill Tapp. Several years after the restoration was completed, George Collord discovered the actual patent model tags in a lot of ephemera he had obtained from a mid-western collector. Plans are still on hold for the dustproof plate for the back. The original was probably metal, but this is speculation. When the project is ultimately done it will have a glass seal on the back cut to the complement of the shape of the plates and hopefully engraved with the history of the watch.. |
wzy19900528 发表于 2016-10-26 15:07
好久没来了,冒个泡。请教各位前辈们,曾经在论坛的一篇文章中有读到,不知是版主的还是nomorewatch兄的, ...
gtgtgt 发表于 2016-10-26 20:55
王兄忙啊.好久没来了.要多多上来指导阿.
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