escape wheel

For this period the escape wheel is "locked" and unable to turn.

Check the escape wheel for straight teeth and also that they are the same length.

The escape wheel, except in unusual cases, has 15 teeth and is made of steel.

The two three-legged escape wheels are also coloured blue and red.

At rest one of the escape wheel teeth will be locked against a pallet.

The rotation of the escape wheel is controlled by the pallets.

The Riefler escape wheel and pallets are of a special design.

It can also cause the points of the escape wheel teeth to dig into the pallet surface.

Another reason the escape wheel teeth are slanted backward is as a safety measure.

Alternatively a 19 jewel watch will have additional cap jewels on the escape wheel.

Each time the pendulum swings through its centre position, it releases one tooth of the escape wheel '.

When the pendulum lifted one arm far enough its pallet would release the escape wheel.

In this watch the driving escape wheel had 5 impulse teeth and the driven had 4.

The drive- and tensioning-weights were made much smaller and drove the escape wheel directly.

The early forms had two escape wheels.

As the escape wheel turns, the pallet is in just the right position to receive a push from an impulse tooth.

The periphery of the fourth wheel is just visible below the escape wheel.

A solution is to make the escape wheel and other parts out of harder materials than steel, eliminating the need for lubrication.

Another later refinement added by Breguet was the reduction in size of the second (driven) escape wheel.

The hinged pallets both pointed the same way, opposing the rotation of the escape wheel.

Instead of using teeth, the escape wheel has round pins that are stopped and released by a scissors-like anchor.

The escape wheel tooth then imparts its energy on a second roller on the balance staff.

The fourth wheel also turns the escape wheel pinion.

When the pallet is pushing the escape wheel backwards it is also being driven hard against its stop.

Once rotating, the escape wheel's speed is locked to the vibrations of the horse-shoe magnet.