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Circuit diagram of a clock generator A desktop PC clock generator, based on the chip ICS 952018AF and 14.3 MHz resonator (on the left) A laptop PC clock generator, based on the Silego chip. A clock generator is an electronic oscillator that produces a clock signal for use in synchronizing a circuit's operation. The output clock signal can range ...
A time clock, sometimes known as a clock card machine, punch clock, or time recorder, is a device that records start and end times for hourly employees (or those on flexi-time) at a place of business. In mechanical time clocks, this was accomplished by inserting a heavy paper card, called a time card
Lorenz Lechler was a late 15th-century German master mason who composed Instructions, a booklet on gothic design, and who contributed to the Heidelberg Church. As a master mason, Lechler's writing gives insight into Gothic architecture from the perspective of a builder as opposed to the more common contemporary perspectives written by clerics.
A fusee (from the French fusée, wire wound around a spindle) is a cone-shaped pulley with a helical groove around it, wound with a cord or chain attached to the mainspring barrel of antique mechanical watches and clocks. It was used from the 15th century to the early 20th century to improve timekeeping by equalizing the uneven pull of the ...
The clock at its original location in May 1979, displaying 17:54 (5:54pm). The Mengenlehreuhr ( German for " Set Theory Clock") or Berlin-Uhr (" Berlin Clock") is the first public clock in the world that tells the time by means of illuminated, coloured fields, for which it entered the Guinness Book of Records upon its installation on 17 June 1975.
In 1889, the German company opened a subsidiary in Ponte Chiasso, Como.The Italian subsidiary was run by a German engineer, Ermanno Spindler.In the early years customers were small-sized non-specialist retailers, professional private users and businesses that employed Lechler products largely on iron and wood, e.g. coaches, railway wagons and carriages, tramway cars and furnishings.
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the cone of Dionysodorus: a concave, conical surface; the quiver of Apollonius of Perga; the conarachne; the conical plinthium; A replica of Parmenion's portable sundial clock (3rd c. B.C.), in Kotsanas Museum of Ancient Greek Technology, Athens, Greece. the antiboreum: a hemispherium that faces North, with the sunlight entering through a small ...