Finally, compare the components of the clock to the options in that manufacturer category to figure out the best one. Again, 400-day clocks are different. In the final analysis, visually inspect the pendulum hook style, the crutch on the back of the movement, and the suspension hook. The shaft of the anchor, called the crutch ends in a fork which embraces the shaft of the pendulum, giving it transverse impulses. 400-day clocks have a reputation for poor time-keeping but again it is unjustified. Driven by the clock, it delivers the impulse that powers the swing of the pendulum. This arrangement results in a more stable pendulum support than simply … You won't need any tools but before you begin, you need to determine which side you need to move the crutch. 573 views 0 0 Share ... Pendulum Wall Clocks, How To Adjust A Pendulum Wall Clock, Cruthes 01, Pendulum Clock Adjustment. The clock pendulum. Kaiser recommends that you only turn the hands backwards. The frequent earth tremors in this region are enough to disturb the delicate balance of a 400-day movement and it will repeatedly stop. Many movements have a simple friction joint, which allows the crutch to be adjusted on its shaft (arbor) without bending. Again, a very light tug downwards will help avoid any misalignment and, if the Vienna is a striker, check there is no snagging of the coil gong. horologica - where only time will tell                                     (All Rights Reserved E&OE - Please see terms of use). For the rest, a combination of good hearing, a quiet room and perseverance is required to adjust the crutch. Contrary to popular belief it is extremely hard to over-wind a spring-driven clock and you'd have to be pretty determined to try. Invariably, I let down the springs completely before shipping for reasons of safety so when you first wind the clock, it will take more turns of the key than usual to run for a week. It sounds worse than it is but should only be attempted if the clock does not run at all, as then you cannot make it much worse! Then do the same on the opposite side. But construction material, temperature, the earth's rotation, height above sea-level and even the day of the week can also affect its performance. For instance, a pendulum clock hung above furniture is going to need more clearance, & the larger it is the higher up the wall it has to sit. The purpose of this setting is for all the needles to remain synced. For the same reason stud partition timber walls are not suitable. Only the tiniest adjustment is required - just a few degrees. it will go but only if the clock is raised on one side. Furthermore, temperature has little effect on a 400-day clock because of the development of modern alloys (Ni-Span C) that compensate by stiffening more as the temperature rises. Clock pendulum leader The objective of this webinar is to examine the interrelationship between the crutch and the pendulum rod. Also avoid any position where it is liable to be knocked as someone passes by. The likelihood is that you'd bend or break the key before you break the spring. Joe, UK. John Patterson says: January 18, 2018 at 9:18 AM I knew something was awry with my stalling Grandmother clock when it was going tick-tock—tick-tock—tick-tock. When a clock winds down (as it will before shipping), the strike train may stop before the going train and the strike therefore gets out of sync. Any clock with a balance wheel is easily identifiable as, unlike the rest below, they have no pendulum. Driven by the clock, it delivers the impulse that powers the swing of the pendulum. Lowering it has the opposite effect. Finally, move the minute hand just past the 12 and count the number of strikes. Ensure it is big enough to support the weight and small enough to fit the hole in the back of the clock. But fortunately they are self-correcting, providing you wait two hours while they go through the full cycle. Wall clocks may be given final adjustment simply by moving the bottom of the case very slightly to one side or the other until they can be heard to be in beat. Mantel clocks with a pendulum on the other hand like rigidity, especially 400-day clocks. An out of beat clocks sounds terrible, and may stop the clock as well. The pivot of the anchor is aligned with the bending point of the spring. An improperly aligned crutch will surely stop the clock! Raising it will shorten the swing and so make the clock run faster. On French clocks with a Brocot suspension, it is possible to alter the swing of the pendulum with a small watch key by turning the arbor that is just visible in a tiny hole above the Twelve on the dial. The central wheel also engages with the pallets fixed to the arbor. As you approach the 6 or 12 slow down to allow the strike train to engage. Ensure that the screw is driven almost fully home to hold the clock close to the wall. Additionally, the crutch is used to “put the clock into beat”. Once the pendulum is attached, it is well worth a very gentle two-fingered tug downwards to make certain that the suspension is straight. If the minute hand is on the 6 when this happens keep turning it while the strike is running until the hand is just past the 12. By slackening the two screws on the back door and rotating the whole movement from the front bezel one or two degrees to the left or right, it may be possible to put it in beat. Also avoid side tables which get knocked and any low position on a level with wagging tails and young inquisitive fingers. Lyre metal clock pendulums do not have the ability to come apart. Clock Repair & Replacement Parts - Pendulum Assemblies, Rods, Bobs, Etc. All these clocks are easy to site but avoid window ledges - if the sun doesn't harm any woodwork first, one day you might find it has been stolen. Stand with your head over the top of the clock an watch the escape wheel click one tooth as the pendulum nears the end of its rotation in one direction. In a weight-driven Vienna, the pendulum and suspension hang from the case itself, not from the movement. Copyright© 2017 American Watchmakers-Clockmakers Institute. (If it doesn't tick, move it to the left, instead). Are they even distance from a vertical center line? Only make a very small adjustment before re-testing. When you then fit the movement, be sure that the arm of the crutch engages in the cutout in the pendulum. So get into the habit of winding it the same day each week. If the crutch starts to flex, let go at once. No matter how well a clock movement has been overhauled, some final adjustment is almost always necessary. If such is the case, mechanical beat adjustment is as simple as over-swinging the pendulum. Initial start-up pendulum over-swing would be … Once set up, they should be screwed to the wall, particularly if standing on a carpet or where there is any likelihood of movement caused by loose-fitting or creaking floorboards. This causes a small change with each swing of the pendulum in the neighbouring clock until they eventually reach equilibrium. To make it easier to navigate, you can jump straight to the section you want by clicking on one of these headings: You'd probably do well to bookmark this page so that you can return to it again later but if you've bought your clock from me, I usually include a hard copy of some instructions specific to each clock when I pack it. 400-day clocks are an exception to this design - a fork fitted near to the top of the suspension engages with an anchor pin instead. The pendulum fits at the back of the clock movement, and slides through an opening called the fork within the suspended iron rod at the back of the movement, which is called the crutch. Please read through everything first and then return to this page to study the parts in sequence when you're ready to set it up. You should hear a consistent: .... tick .... tock .... tick .... tock .... tick .... tock .... tick .... tock. And they don't like vibration. How do pendulums work physics? When you look at a pendulum clock from the outside, you notice several different parts that are important to the mechanism of all pendulum clocks: There is the face of the clock, with its hour and minute hand (and sometimes even a "moon phase" dial). The Bird Of The Cuckoo Clock. Turn on your speakers and go to my HOME PAGE to hear the sound of a Longcase clock in beat. Instead, bend the crutch against the resistance of the other hand or between fingers of the same hand. To adjust these, move the crutch in the desired direction to the limit of its free travel and then apply slight pressure. The crutch on mine isn’t a piece of wire, so can’t be bent to adjust the beat. If it was not supplied by me, and you really want to try it yourself, there are plenty of useful websites explaining the process but here's my approach. If it's worse, place the coin under the other side instead and listen again. Don't try offering the clock up and then screwing it in place; instead, hang it like a painting. The crutch is the thin brass rod that connects the escapement to the pendulum. For mantle clocks with a pendulum, a temporary cure may be to place something under one side of the clock, such as a coin, and listen again to see if it's any better. It extends from the upper part of the clock movement down along the pendulum suspension rod and loops once around the suspension rod at its bottom point. CHECK IT'S IN BEAT: Listen carefully to it tick/tock. But as they unwind nearly fifty times slower than a French mantel clock, there are much more sensitive to error so be particularly careful. CLOCK REPAIR A Beginner’s Guide Ian Beilby Clocks Magazine Beginner’s Guide Series No 1. The clock-maker does this In common clocks by bending the crutch, but when the discrepancy is nut great, any one may produce the desired equality by tilting the frame a little; in table-clocks there are generally footecrews for the purpose, or if not, the feet may be propped by pieces of wood, card, /he. The development of these types of clocks were fist carried out by an English clockmaker in the late 17th century. Bend the crutch rod while supporting it with the other hand. It must be level and perfectly vertical or the pendulum may come into contact with the weights or backboard. To set the clock in beat, reposition the crutch of the pendulum. Then move the hour hand to correspond with the number of strikes. The quality of the movement will have a major influence on a clock's ability to keep good time. Hang it from a secure screw, preferably a dome head rather than a countersunk as there is less risk of it sliding off. I can understand the science behind this but I've not heard of any other clockmaker suggesting it so be warned. The origin of the name grandfather is unclear but a general assumption is, a pendulum clock above 6 ft. (1.5 m) is termed as a grandfather clock. A pendulum consists of a mass (known as a bob) attached by a string to a pivot point. The crutch is the thin brass rod that connects the escapement to the pendulum. document.write(new Date().getFullYear()); If a clock has a wobbly pendulum it is often caused by a twisted or partially torn spring. They should hang freely and vertically. We are a new Grandfather Clock Dealer and are not setup for repair, but occasionally we do have calls from grandfather clock owners who have recently moved their clocks or received one from a family member and during the move the grandfather clock pendulum hanger, crutch or something moved out of place. The reason a clock pendulum often stops swinging, after being moved, is because the clock case now leans at a slightly different angle then it did at its former location. When you need to turn the clock back an hour (to BST) in the Autumn, if it has a pendulum try just stopping it for an hour and then restarting it again. Like hand washers you can and should purchase a good assortment of suspension springs. 400-day clocks are an exception to this design - a fork fitted near to the top of the suspension engages with an anchor pin instead A three-train clock (one with three key holes) will sound the four quarters on chimes (usually Whittington or, more commonly, Westminster (Big Ben). If it gains or loses half an hour a day, you probably have the wrong suspension fitted so see the person you bought it from (it won't be me). A clock is "in beat" when the tick and the tock are evenly spaced. Moving it with the pendulum attached also places unnecessary strain on the delicate steel suspension from which it hangs and risks expensive damage to the escapement. SYNCHRONISING THE STRIKE: Never wind the hands backwards. Get a carriage clock instead. Weight-driven clocks are different; they exert a consistent force (which is one reason that they are often more accurate day by day). A shelf, mantelpiece, bracket or heavy unit on a concrete floor are infinitely better. Finally, ensure that the pendulum can swing freely and that the bob is straight. CLOCK REPAIR A Beginner’s Guide Ian Beilby Clocks Magazine Beginner’s Guide Series No 1. Additionally, these items are removable on wood stick pendulums only. Pendulum clock are usually more accurate than balance wheel clocks. 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