cazalea"Listen to your Father!" is a common thing said by mothers to their children. "Pay attention" is frequently uttered by teachers in a classroom. "Listen Up" is something figures in authority usually say before giving instructions. I thought about listening when David Walter posted here about his MicroSet device " hearing " a recent earthquake...">Story

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DonCorsonPendulum clocks are fascinating me these days. And of course different ways of making them. Having recently acquired a 3D FDM printer I decided to see how (if) one could make a precision clock using this means of production. As I already had a mechanical design for a clock with a Graham escapement that I had planned to make traditionally in brass this was a great starting point for an interesting summer project...">Story

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David WalterI occassionly work on antique pieces if they are "Interesting", this watch in a gold case and signed on the cuvette Pournier a Geneve, fell into the "interesting" catagory.. The dial is unsigned. The Lepine style movement is also not signed, it is possible that this is a movement made by Lepine for a business client. The movement is "before jewels" meaning all pivots including the balance pivots run in brass bushings and have hard steel endpieces...">Story

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DonCorsonRonda announced at BaselWorld this year their (re)entry into the fray of mechanical movement producers. Ever since ETA announced that it would no longer serve all customers there has been great concern by many brands to get replacements for the ETA movements they have been using. Ronda is a major producer of high quality quartz movements and had also in their history produced mechanical movements, up into the 1980s. Ronda produces their parts at several sites in Switzerland and does assembly of those parts .....">Story

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DonCorsonDavid has sent me the first pictures of the finished clock. A marvel of handcrafting, Davids hands. The complete specificaions: Double Pendulum Clock with Planisphere and wandering Moon by David Walter. Features; Double Pendulum clock with two independent month going movements...">Story

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DonCorsonThe dial is the face of the clock, and the hands the smile. David has provided us with a hand making how-to and some great pictures of the results. Davids comments: " the making of the Mean/Solar minute hand in steel. The hand will be the Breguet moon hand style, the material used is 0.80mm thick high carbon steel...">Story

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DonCorsonI have recently been surprised by a new insight I have had working on my first pendulum clock. It is again something that can be explained with the help of that enigmatic parameter of oscillating systems known as the quality factor Q. I have discussed the quality factor before here, as I presented a lecture by Douglas Bateman about the quality factor and the first results measured on my own pendulum clock. Since those first results I have changed the weight by making it smaller and also heavier (filling with .....">Story

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DonCorsonDavid has finished the sidereal conversion train. As you know this train is used to convert the mean solar time that we usually use, based on the position of the sun, to astronomical time, based on the position of the stars. Following is David's description of the work. For those of you who didn't see the earlier installments of this series, you can catch up by looking here: - Installment 1 – Introduction and Cutting out the plates - Installment 2 – Making the Barrel - Installment 3 – The Suspension - Installment .....">Story

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DonCorsonDavid has completed much in the last weeks. Following is the description in Davids own words. For those of you who didn't see the earlier installments of this series, you can catch up by looking here: - Installment 1 – Introduction and Cutting out the plates - Installment 2 – Making the Barrel - Installment 3 – The Suspension - Installment 4 – Invar Pendulum Parts - Installment 5 – Making the Wheels - Installment 6 – Completing the Barrels, Cutting some Pinions - Installment 7 – The Escape Wheels - Installment ... ...">Story

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DonCorsonEvery week we are seeing more of David's work on his new double pendulum clock. This is a short installment. Heavy work. For those of you who didn't see the earlier installments of this series, you can catch up by looking here: - Installment 1 – Introduction and Cutting out the plates - Installment 2 – Making the Barrel - Installment 3 – The Suspension - Installment 4 – Invar Pendulum Parts - Installment 5 – Making the Wheels - Installment 6 – Completing the Barrels, Cutting some Pinions - Installment 7 – .....">Story

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