Pallet:
Part of the pallet arm on the pallet arbor, made of hardened steel or jewel. The pallets are ring segments inserted in the pallet arm. The centre of the ring segments is identical with the rotation centre of the pallet arbor. The polished inclined planes are called impulse faces.

Pallet arbor bridge:
Bearing of the pallet arbor on the back plate.

Pendulum:
Still today’s best mechanical oscillation device. The period is determined by the length of the pendulum and the force of gravity.

Pendulum bob:
Heavy cylindrical weight at the lower end of the pendulum rod

Pillar:
Also movement pillar. Keeps distance between the plates.

Pinion:
Gear with less than 20 teeth. Manufactured in most cases of hardened steel. In the Sattler Clocks are mostly 5 hardened pinions. Intermediate wheel pinion, centre wheel pinion, fourth wheel pinion, escapement wheel pinion, minute wheel pinion.

Pitch:
The distance between two tips of teeth, i.e. the circumference of the pitch circle divided by the number of teeth.

Pivot:
Thin end of a shaft. Part of the shaft which turns in the bearing holes of the plates. The pivots are made of hardened steel.

Plates:
Hold the bearings and are the base for all other movement parts.

Precision pendulum clock:
Sophisticated timekeeper with extremely high accuracy. Clocks with compensated pendulums were used until the late 60´s as reference time for science and official standard time.

PVD = Physical Vapour Deposition

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