Torson clock mini suspension unit how to#
Also, you'll need to know how to set the clock in beat after fitting it yourself.īy the way, if you've cracked or lost the protective dome, I can't help for reasons I've not been able to fathom, every size of dome is available except the size most commonly used. For more on this check out my short guide on How to make up a suspension. The suspension spring is the most fragile part and if it's damaged a new one is required, only use genuine Horolovar suspension material. If you find a repairer willing to take one on overhaul costs are generally modest but costs will increase if someone else has tinkered with it first because it can take twice as long to correct their mistakes, especially if they have re-bushed any pivot holes, moved the pallets or worst of all turned the eccentric screw that supports the escapement arbor. Another source of information for repairers is Mervyn Passmore's automated Anniversary clock identification system - which is FREE! The excellent 'Horolovar 400 day Clock Repair Guide' is the bible for these torsion timepieces, but an excellent book is Joseph Rabushka's 'Repair and Restore your 400 Day Clock'. Other makers also use a plainer disc but the four rotating balls type pendulum is the most common. The pendulum of most Gustav Becker 400-day clocks takes the form of a heavy, lipped disc with two small weights on top that can be adjusted in or out to regulate rotation speeds. But there are many more including the collectible (and overpriced) Universe clock from Kaiser. Uniquely, these Grivolas clocks are front wound and Images 4 & 5 show the front and back of the movement. The French firm Claude Grivolas also made 400 day clocks mostly with integral case rather than under a glass dome. Some of the prominent Torsion clock makers include Gustav Becker ( Image 1), Jahresuhrenfabrik ("JUF" - who coined the 'Anniversary' name and also produced a larger "bandstand " version as in Image 2), Kienzle, Kieninger & Obergfell (KundO), Badische Uhrenfabrik ( Image 3) and Phillip Haas. Having said that, unless you rewind them two or three times a year you might find them losing time after six months as the mainspring gradually loses power. They are precision-made since on one winding, they will run fifty times longer than most clocks, not that the mainspring is fifty times longer but because it's stronger to drive the much higher gearing introduced by an extra wheel and the fact that a single swing of the pendulum typically takes seven and a half seconds instead of a fraction of a second in many other mantel clocks. 400 day clocks also have a reputation for poor time-keeping but that's partly because they are left uncorrected for weeks as they don't need frequent winds, so it's often just a gradual accumulation of a lost half-minute each day.Īlmost exclusively German in origin, a great many Anniversary clocks are very well machined, on a par with French carriage clocks.
Even when you know what you're doing, these torsion clocks can be a problem. Testing also takes longer and so they can be labour-intensive to set up. Also, the pallet depth is different and setting them in beat can be a challenge. The majority of repairers avoid them because they need additional effort and focus. An advantage to the collector is that 400 day clocks are largely unloved and under-rated and often, therefore, ridiculously cheap, but there is a reason for this. The humble 400 day clock is also known as an Anniversary clock (as it's supposed to run for a year on one winding), or a Torsion clock (a term I prefer but which is not widely recognised outside clock making circles) but all three terms are interchangeable. After reducing the number of hours I can devote to this hobby, I'm afraid I no longer take repair enquiries for these clocks, but here's a bit about them.
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