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 ?
A number of motorists expressed resentment at the move by the traffic department to remove digital timers at all traffic lights and intersections.
Testing Timers watches allow students to control pace and reduce anxiety.
8220;We are pleased to add Time Timer to our list of Teachers' Choice Award-winning companies,” said Anne Sumpter, publisher of Learning.
Mr Koutsantonis said the introduction of the first timer at North Terrace has shown most pedestrians understand the purpose of the countdown timers and how to use the information.
Milleman said the utility will encourage developers to use cost-effective conservation measures -- including smart timers -- to reduce water consumption by 10 percent per capita.
A freephone helpline (0800 408 0048) has also been created for UK customers to contact the firm for advice and to arrange an appointment for the timer to be replaced.
Become an illusionist: Homeowners c ate the illusion that someone is in the home by using timers on lights, radios, and televisions--making a residence appear occupied, even when no one is home.
Mechatronics"/Mechanical Functions: The PIC10F devices are an ideal solution to replace traditional mechanical functions, such as smart switches, mode selectors, remote I/Os, timers, LED flashers, and any other form of mechanical timers and switches.
But there's a simpler option for small or isolated areas of the garden that can be irrigated from a single hose bibb: a battery-operated timer.
Bollier also testified to having personally delivered timers to the Libyan embassy in former East Germany as well as giving timers to the East German Secret Service - the Stasi.
Both tutors and students appreciate Testing Timers simple design which shows at-a-glance exactly how much time remains to complete each section of the ACT or SAT examinations.
For household missions and specific jobs, the timer is set.