Clock Terms

Arabic Dial:

Most familiar numeral (1, 2, 3, 4, etc.) used on a dial for clocks as distinguished from Roman numerals (I, II, III, IV).

Ascending Alarm:

Alarm that increases volume.

Bezel:

The grooved rim around the dial into which the crystal is set.

Bob:

Polished round disk at the lower end of a pendulum.

Chapter Ring:

A decorative ring on the clock's dial upon which the hour markers are indicated.

Crystal:

A glass or plastic piece that covers the dial for both protection and decoration.

Dial:

The face of clocks.  A decorative plate on which the hours are indicated.

Finial:

Decorative ornament, usually in wood or brass, placed on top of the clock's cabinet.  Used most frequently in mantel, wall and long case clocks.

Hands:

Pointed metal indicators, usually decorative, which mark the hour, minutes and seconds on the clock's dial.

Liquid Crystal Display (LCD):

Time is displayed continuously in digits.  Electrical current is applied to a layer of liquid crystals between two layers of transparent material.  The crystals form the digits.

Light emitting Diode (LED):

Numbers telling the hour and minutes light up.  Electrical current transmits coded signals that translate into numbers.

Minute Track:

A square or circular track divided into 60 equal segments.  It may appear on the outer perimeter of the dial or in the dial center.

Movement:

The inner mechanism of clocks: may be weight-driven, spring-driven, battery-operated or electric.

Pendulum:

Swinging rod and weight (bob) suspended below the clock's movement.  The pendulum determines the rate at which the movement measures time.