British Domestic Synchronous Clocks 1930-1980: The Rise and by Leslie Philip Pook

By Leslie Philip Pook

This booklet enhances to be had one-make books on family synchronous clocks. it's also a heritage of technological know-how publication that units British household synchronous clocks, their brands and know-how of their social context.

Part I covers the ancient historical past, British family synchronous clock brands and types, how synchronous clocks paintings, family synchronous clock circumstances, useful recommendation at the servicing of household synchronous clocks and research of the promoting and reliability of British family synchronous clocks. This research presents a proof of the increase and eventual fall in their expertise. half II includes galleries of a range of British family synchronous clocks and of the events with which they're outfitted. there's a back and front view of every clock, including a short description. perspectives of every circulation contain perspectives with the stream partially dismantled, including a quick technical description of the movement.

This profusely illustrated publication is essentially for fellow fanatics and is predicated on an in depth archive of data on family synchronous clocks, their pursuits and their brands. present electric laws suggest that pro clockmakers are reluctant to fix synchronous clocks. actually, only if they've got now not been mistreated, synchronous clocks are typically trustworthy, and really effortless to keep up.

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These magnetic fields are invisible. By contrast, a mechanical clock has an escapement which can be seen operating (Pook 2011). A magnet is a material or object that produces a magnetic field (Davidge and Hutchinson 1909; Walker 2011; Wikipedia 2014). This magnetic field is responsible for the most notable property of a magnet: a magnetic force that attracts or repels other magnets. The strength of a magnetic field at any point is the magnetic flux. P. 1007/978-3-319-14388-0_3 33 34 3 How a Synchronous Clock Works Fig.

01 s for a rotor to move from opposite one stator pole to opposite the next stator pole. It follows immediately that a rotor with 30 poles rotates at 200 rpm. 2 Synchronous Motors 37 Fig. 2 Metamec Type 1 movement, (a) Front view, (b) Front view with the front plate and rotor assembly removed, (c) Rotor assembly Fig. 3 Variation of voltage with time for an alternating current supply for a frequency of 50 Hz 38 3 How a Synchronous Clock Works Fig. 4 Variation of magnetic force with time for an alternating current supply with a frequency of 50 Hz Fig.

Production of Temco synchronous clocks appears to have started in 1931 and ended sometime after about 1952. They used their own synchronous clock movements and sometimes used synchronous clock movements made by another manufacturer. 21 Westclox Ltd Westclox Ltd had its origin as the United Clock Company, formed by Charles Stahlberg and others, on 5 December 1885 in Peru, Illinois, USA (Wikipedia 2014). The intention was to manufacture clocks based on a patented technological innovation by Stahlberg.

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