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A flip clock (also known as a "flap clock") is an electromechanical, digital time keeping device with the time indicated by numbers that are sequentially revealed by a split-flap display. The study, collection and repair of flip clocks is termed horopalettology (from horology – the study and measurement of time and palette – and the Italian ...
Photo of "split-flap" display mechanism Detail showing part of the internal mechanism Cifra 5 digital flip clock designed by Gino Valle (1954). Gino Valle's relationship with the Solari company began in 1954 with the design of the Cifra 5 electromechanical digit-snap clock (patented in 1957), consisting of 4 vertical pallets of 10 numbers each making up all the hours. [5]
The company eventually designed displays with 40 flaps, with the help of Belgian inventor John Myer. The new displays could include numbers and letters, allowing for a much wider use. [1] The company's Cifra 5 clock was awarded the Compasso d'Oro in 1956. [2] In this year, Solari sold its first moving sign to Liege railway station in Belgium ...
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The Signaltron main departure board at Praha-Smíchov station, Czech Republic (2012), manufactured by Pragotron Schematic of a split-flap display in a digital clock display An animation of how a split-flap display works Flap departure board at Gare du Nord, Paris (2007) Section of a split-flap display board at Frankfurt (Main) Hauptbahnhof (2005) Enlarged inner workings of a split-flap clock
An asynchronous (ripple) counter is a "chain" of toggle (T) flip-flops in which the least-significant flip-flop (bit 0) is clocked by an external signal (the counter input clock), and all other flip-flops are clocked by the output of the nearest, less significant flip-flop (e.g., bit 0 clocks the bit 1 flip-flop, bit 1 clocks the bit 2 flip ...
In evaluating a number of models of sunrise alarm clocks from several brands, we looked at features (especially brightness and light colors), ease of setup, overall design, price, buyer reviews ...
Twemco is the world's leading manufacturer of automatic flip clocks and its products became a symbol of Hong Kong precision engineering during the mid-20th century. [3] [4] The company claims to have sold almost 1 million clocks. [5] The design of Twemco's desk clocks resembles that of the world's first flip clock, the Cifra 3 designed in Italy ...