Ads
related to: battery operated backlit wall clock with timer
Search results
Results from the WOW.Com Content Network
Telechron—now the "Clock and Timer Division" of GE—declined in the 1950s, mainly because batteries had become much more long-lived and reliable. Battery-powered clocks have the obvious advantage of not depending on the proximity of a power outlet, and do not require the often somewhat unattractive electric cable.
These keep time by counting the oscillations of a calibrated tuning fork with a specific frequency. These were only made in battery-powered form. Battery-powered clocks have been made using the schemes above with the obvious exception of a synchronous movement. All battery-powered clocks have been largely replaced by the lower cost quartz movement.
It is also possible for quartz clocks and watches to have their quartz crystal oscillate at a higher frequency than 32 768 (= 2 15) Hz (high frequency quartz movements [4]) and/or generate digital pulses more than once per second, to drive a stepping motor powered second hand at a higher power of 2 than once every second, [5] but the electric ...
Keystone manufactured watches at the location signed "E. Howard Watch Co." These watches were of new designs and unlike those of the original Howard company. Clocks were manufactured at Roxbury, a section of Boston, but in the early 1930s those operations were also moved to Waltham, Massachusetts. A very small number of pre-existing Howard ...
The timer may switch equipment on, off, or both, at a preset time or times, after a preset interval, or cyclically. A countdown time switch switches power, usually off, after a preset time. A cyclical timer switches equipment both on and off at preset times over a period, then repeats the cycle; the period is usually 24 hours or 7 days.
A clock radio with three green dimmable backlit displays, one main display and two separate alarm displays. It has a white plastic body and silver blue faceplate, a PLL synthesized AM/FM tuner with five preset buttons, two alarms with either radio, beeper, or two selectable melodies as wake up chimes, and a nap button. It has no battery backup.
Ads
related to: battery operated backlit wall clock with timer