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Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details. |
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18th Nov 2019, 10:05 pm | #21 |
Dekatron
Join Date: Nov 2011
Location: Surrey, UK.
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Re: Ship's Clock
You know, that rings a bell (OK, context...) with me, I do remember seeing a "72 minute" clock scale somewhere and being puzzled by it.
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18th Nov 2019, 10:09 pm | #22 | |
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Re: Ship's Clock
Quote:
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19th Nov 2019, 2:46 am | #23 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,676
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Re: Ship's Clock
You have five marine minutes, Troy Tempest!
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19th Nov 2019, 7:25 am | #24 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Re: Ship's Clock
The HP Baseband Analyser had, amongst others, a group of keys to select different measurement modes. One was called 'Noise Analysis' but that was too long to go on the keycap. Keycaps were made bearing the legend 'NOISE ANAL'. I kid you not.
It wasn't a mistake. Those managing the project thought it was the correct abbreviation. This makes it much funnier. The 72 minute clocks just seem sad. David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
19th Nov 2019, 9:43 am | #25 | ||
Dekatron
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 17,820
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Re: Ship's Clock
Quote:
Quote:
N. |
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23rd Nov 2019, 7:33 pm | #26 | |
Octode
Join Date: Jan 2012
Location: Wimbledon, London, UK.
Posts: 1,464
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Re: Ship's Clock
Quote:
Colin. |
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24th Nov 2019, 3:03 pm | #27 |
Rest in Peace
Join Date: Apr 2011
Location: Matlock, Derbyshire, UK.
Posts: 1,378
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Re: Ship's Clock
Is the backwards dial made to match a forwards dial fitted back to back with common shafts with no reverse gearbox.
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24th Nov 2019, 3:08 pm | #28 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Re: Ship's Clock
I think the stepper motor is assembled with some parts upside down.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
24th Nov 2019, 5:55 pm | #29 |
Dekatron
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,190
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Re: Ship's Clock
Yes. The asymmetric part is the core plate that goes through the drive coil (normally soldered to the PCB) and which surrounds the magnetised rotor. If you turn it over then the clock will run backwards. There is normally a little hole in the core which fits over a stud moulded into the case so they are assembled correctly at the factory. But if you shave this stud off with a knife blade you can turn the core over and get a backwards clock.
I did that to one of mine about 25 years ago. |