What is a fusee clock movement?

In a fusee clock, the barrel turns the fusee by pulling on the chain, and the fusee turns the clock’s gears. When the mainspring is wound up (Fig. 1), all the chain is wrapped around the fusee from bottom to top, and the end going to the barrel comes off the narrow top end of the fusee.

What means fusee?

Definition of fusee 1 : a conical spirally grooved pulley in a timepiece from which a cord or chain unwinds onto a cylinder containing the mainspring and which by its increasing diameter compensates for the lessening power of the spring. 2 : a red signal flare used especially for protecting stalled trains and trucks.

How does a fusee watch work?

When the watch is fully wound, the chain is completely wrapped around the fusée. As the spring relaxes, the entire barrel rotates and winds up the chain. In doing so, it turns the fusée, which transfers the torque to the going train via a drive wheel.

How can you tell if a clock is vintage?

An antique clock is at least 100 years old. If your clock is younger, it’s considered vintage. You can learn more about the age of your mantel clock, as well as its likely origins, on the DiscoverClocks.com website and clock forum.

What is a fusee made of?

Fusees are used by firefighters to light fires, often when burning fuel inside firelines or when igniting prescribed fires. The fusees contain perchlorates, which can contaminate water. This tech tip discusses how firefighters can use and dispose of fusees so they are less likely to contaminate water.

Can you use WD40 on clock movements?

Don’t use 3-in-One or even worse, WD40. Both will impair the clock’s ability to work; modern clock oil is synthetic so much longer lasting than mineral or vegetable oils, which break down over time. Clock oils also contain rust inhibitors to protect the clock.

What is a lighted fusee?

/ (fjuːˈziː) / noun. (in early clocks and watches) a spirally grooved spindle, functioning as an equalizing force on the unwinding of the mainspring. a friction match with a large head, capable of remaining alight in a wind.

What are Fusees used for?

In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its essential component is a metal wire or strip that melts when too much current flows through it, thereby stopping or interrupting the current.

How do you identify clock movements?

The first set of numbers (six or eight with a hyphen in the middle) tell us what type of the movement it is and any additional number identify the length of the gearing (pendulum). Please note that Hermle clock movements often have the name of the clock case maker stamped onto the brass plate of the movement.

How hot does a fusee burn?

1,400° F
Fusees burn at 1,400° F (760° C) and can burn you severely. Also, when fusees burn, they give off toxic fumes. Avoid these fumes as well as contact with hot splattering phosphorous slag. Sometimes firefighters may have to burn out without a drip torch or fusee.

Which lubricant is most suitable for clocks and watches?

Oils & Greases for Watch & Clock

• Oil for Escapements. Synthetic oil manufactured for use on pallets.
• Quartz Oil. Designed for quartz analog watches, particularly the rotor bearing, click wheel and gear train.
• Natural Watch Oil.
• Synta-Visco-Lube.
• Natural Clock Oil # 3A.
• Nyoil.
• Nye PML Oil.
• Regular Grease for Clocks.

Can I use 3in1 oil on my clock?

What is a fusee on a clock?

Fusees became the standard method of getting constant force from a mainspring, used in most spring-wound clocks, and watches when they appeared in the 17th century. At first the fusee cord was made of gut, or sometimes wire.

What is a going Fusée movement?

Many later fusée movements use a “maintaining power” mechanism (usually a planetary gear mechanism in the base of the fusée “cone”) which keeps the watch running during winding. Such a fusée movement is called a “going fusée.”

What is a winding stop on a fusee clock?

Most fusee clocks and watches include a ‘winding stop’ mechanism to prevent the mainspring and fusee from being wound up too far, possibly breaking the chain. As it is wound, the fusee chain rises toward the top of the fusee.

How does a fusee pulley change the shape of a clock?

As the movement ran, the tapering shape of the fusee pulley continuously changed the mechanical advantage of the pull from the mainspring, compensating for the diminishing spring force. Clockmakers apparently empirically discovered the correct shape for the fusee, which is not a simple cone but a hyperboloid.