timer

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timer

(tīm′ĕr)
A device for measuring, signaling, recording, or otherwise indicating elapsed time. Various forms of timers are used in radiographic, surgical, and laboratory work.

timer,

n radiographic timing device that functions as an automatic exposure timer and a switch to control the current to the high-tension transformer and filament transformer. The face of the timer is calibrated in seconds and fractions of seconds. The timer controls the total time that the current passes through the radiographic tube and thus the time during which the roentgen rays are emitted. The timer activates a switch or contractor that closes and opens the low-voltage circuit of the high voltage.
timer, electronic,
n an electronic vacuum tube device, with no moving parts, that covers a time range of 1/20 to 10 seconds. It automatically sets itself, is more accurate than mechanical timers, and meets all the needs of modern high-speed dental techniques.
timer, foot,
n a timer with an attachment that permits the timing device to be activated by foot pressure. This is the preferred type of timer.
timer, hand,
n an attachment to or part of a timer that requires thumb or finger pressure to activate the timing device.
timer, mechanical,
n a timer using a spring mechanism for determination of length of exposure. Accuracy of timing is not assumed in exposures of less than 1 second with a mechanical timer.

timer

the device on the x-ray machine that controls the period of exposure to the beam. It may be a simple clockwork, wind-back timer, or one of two electronic timers which are capable of fast and repeated exposures. Only electronic timers are allowed on modern machines.
References in periodicals archive ?
Use an electronic timer to determine which, if any, prove more effective.
11 /PRNewswire/ -- LCR Electronics, a leading manufacturer of EMI filters and electronic control products as well as high-end enclosures for military, telecom and commercial applications, now offers OEMs two electronic timers in an open board style that provide a classic or modern look to a major cooking appliance.
A window series with full-function remote control offers and electronic timer which can be programmed.
Seven alarm LEDs, PID temperature control and an electronic timer for auto-starting are provided.
Mind you, help of a sort is on the way in the form of a pounds 20 bikini which has an electronic timer that beeps every 15 minutes to remind its wearer to roll over or seek shade.
The R45 has a built in electronic timer and pulse, which ensures that beans can be ground to the correct consistency for each individual pate recipe.
Normally one of sport's most impassive stars, he danced with delight on the track, posed by the electronic timer for scores of photographers and proudly brandished the Stars and Stripes.
Webtech says the unit can load as much as 400 lb/hr of virgin or regrind and uses an electronic timer to regulate filling.
Julian will take a photograph every minute prompted by an electronic timer that beeps every 60 seconds.
The clock radio has a large LED electronic timer display and can be set to wake to either music or an alarm.
Players may explain or act out the word however they wish and the electronic timer keeps the game full of suspense.

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