Richard Broom Photography

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Posts from the ‘Engineering’ category

The Harrison Clocks

Without John Harrison’s clocks we would have been, quite literally, lost at sea. Nobody could underestimate the importance and brilliance of John Harrison’s clocks (or marine chronometers as we know them these days).

I satisfied a long-held ambition this morning when I went to see John Harrison’s beautifully made (and priceless) clocks at the Royal Greenwich Observatory. All the clocks Harrison designed and built are still working just fine……ticking away happily in glass display cages in a quiet corner of the observatory.

And, John Harrison (1693 – 1776) was a son of Lincolnshire. So am I but I have yet to knock out a clock or two!

The Harrison Clocks - Richard Broom Photography
The Harrison Clocks – Richard Broom Photography

The T1154 and R1155

The T1154 transmitter and the R1155 receiver were the first radios I used to transmit and receive signals (in my teens in the 1960s). These transmitters and receivers were used in Royal Air Force heavy bombers and other aircraft during World War 2. These transmitters and receivers used Morse code and the morse code signal used to ‘chirp’ (sounded a bit like a demented bird on drugs!). Some ‘chirping’ Morse code here.

Transmitter (top), receiver (bottom) – Richard Broom Photography
Courtesy Wikipedia and the Imperial War Museum
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