Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator...

quartz clocks and watches. Currently, atomic clocks are the most accurate clocks in existence. They are considerably more accurate than quartz clocks...

included replacing the mechanical or electromechanical movement with a quartz clock movement as well as replacing analog displays with digital displays such...

Canadian engineer and inventor. Marrison was the co-inventor of the first Quartz clock in 1927. Marrison was born in Inverary, Frontenac county, Ontario. He...

one second per year before it was superseded as a time standard by the quartz clock in the 1930s. Pendulums are also used in scientific instruments such...

powered mechanical clocks that were used before quartz clocks were introduced in the 1980s. The first experimental electric clocks were constructed around...

pendulum clocks, accurate to about 10 milliseconds per day. In 1929 it switched to the Shortt-Synchronome free pendulum clock before phasing in quartz standards...

prismatic quartz Sceptered quartz Sceptered quartz (as aggregates: "Elestial quartz") Bipyramidal quartz Tessin or tapered quartz Twinned quartz (known as...

radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly) referred to as an "atomic clock", is a type of quartz clock or watch...

frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits, and to stabilize...

Odyssey. Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 32,768 hertz crystal oscillator as in a quartz clock to keep time....

chronometer. The electric clock, invented in 1840, was used to control the most accurate pendulum clocks until the 1940s, when quartz timers became the basis...

be based on quartz clocks that are corrected periodically by satellite time signals or radio time signals (see radio clock). These quartz chronometers...

quartz oscillator is less subject to drift due to manufacturing variances than the pendulum in a mechanical clock. Hence most everyday quartz clocks do...

atomic beam magnetic resonance frequency clocks. The accuracy of mechanical, electromechanical and quartz clocks is reduced by temperature fluctuations...

component Engineered quartz, a synthetic material used for countertops and the like, called "quartz" in the trade Quartz clock, a clock or watch using an...

with an internal atomic clock. Unlike the radio watches described above, which achieve atomic clock accuracy with quartz clock circuits which are corrected...

in electro-mechanical clocks and is a special kind of single-phase stepping motor. Both analog and stepped-movement quartz clocks use the Lavet-type stepping...

Chronometer, a dramatically smaller version of its previous quartz clock. The quartz clock Seiko had supplied to a broadcasting station in 1959 was about...

crystal frequency is usually 32.768 kHz, the same frequency used in quartz clocks and watches. Being exactly 215 cycles per second, it is a convenient...

Astron wristwatch, formally known as the Seiko Quartz-Astron 35SQ, was the world's first "quartz clock" wristwatch. It is now registered on the List of...

hour). Some musical quartz clocks in the chalet style also reproduce many of the popular automata found on mechanical musical clocks, such as beer drinkers...

A clock face is the part of an analog clock (or watch) that displays time through the use of a flat dial with reference marks, and revolving pointers...

This sound can often be heard as a rhythmic ticking, somewhat like a quartz clock, which fades in and out and can be heard by human ears in a relatively...

an 8192 Hz Electroquartz clock, this was Omega SA's first quartz production quartz clock and used a thermo-compensated quartz bar and integrated circuit...

plane Lever Pulley Screw Wedge Wheel and axle Clocks Atomic clock Chronometer Pendulum clock Quartz clock Compressors and pumps Archimedes' screw Eductor-jet...

ropeway conveyors have used the energy from moving water or rocks, and some clocks have a weight that falls under gravity. Other forms of potential energy...

standard timekeeper until it was superseded as a time standard by the quartz clock in the 1930s. In the mid-19th century, the need for a standard time zone...

The basic parts that all clock generators share are a resonant circuit and an amplifier. The resonant circuit is usually a quartz piezo-electric oscillator...

plane Lever Pulley Screw Wedge Wheel and axle Clocks Atomic clock Chronometer Pendulum clock Quartz clock Compressors and pumps Archimedes' screw Eductor-jet...