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Darkwood

[ElectriciansForums.net] Mystery Item thread.... What am i?[ElectriciansForums.net] Mystery Item thread.... What am i? This is out of an old Russian lathe it has 4 contacts on it 2 x NC and 2 x NO it has a coil and on top it has a sealed oil filled reservoir.
What is its function!

Spoiler alert!!! Answer in post 9!!!
 
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It's very pretty,i could do with it in front of me......Is the oil filled resevoir affording cooling to the coil via structure? I have seen many devices fitted to old eastern european gear and they do not tend to have anything which is frilly or non-essential.
 
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No the oil reservoir provides a function and can be adjusted to suit its a mechanical operation and has nothing to do with cooling.
We can of course establish this is a relay of some nature but it affords an extra function when the coil is de-energised.
 
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Il let the cat out of the preverbial bag so to speak as any mor clues would give it away...

Its a timer relay with true off delay..... When the coil is energised it pushers a lever onto a micro switch to change the relay states, when the coil is de-energised the lever stays in position held by the suction of the oil reservoir which slowly releases in accordance with the speed at which the oil pressure is released (adjustable with a screw)

Its particular function on the lathe was to energise the Electromagnetic Brake after the stop button has been hit and the off delay is adjustable and requires no permanent power to relay.... The brake is DC and the control is 110v AC so a fault or loss of AC control would hopefully still allow the braking to function safely.

It oil reservoir works the same way the push button timer switches do normally used on stairwell lighting in flats.

[ElectriciansForums.net] Mystery Item thread.... What am i? Modern technology version although can't see this doing the 50yrs service the old one did.
 
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Me only been in the working life 25yrs sometimes seeing these old devices throws a curve ball at me as firstly before you can fault a machine you need to recognise what the hell some off the gear is .... with no wiring plans or any clues on the unit it took a good hour to work out its function and where its role was in the machine ..... once i sourced a modern replacement it took 10mins to replace..... Everydays a school day even for my experienced yrs....

Anybody got any old relics on their shelf that may fall within the nature of this thread then feel free to post them up for us to try and identify.
 
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Nice bit of traditional Soviet technology there Dark, what actually failed on it? Most of their industrial stuff seems to go on almost for ever.

While we're on machine tools I'll offer one from our own workshop. It's a 1957 Swiss-made Dixi jig-boring machine driven by its original Ward-Leonard variable voltage DC speed controller. The operator adjusts the speed over a wide range with a small dial on the control panel, it is reversible and has an inching mode. The controller feeds the drive motor with 0-320V 0-65A DC from the motor-generator set which is separate to the machine. The mystery item is part of this system, located inside the electrical cubicle on the machine. It has a laminated steel core with (IIRC) five windings on it, however the answer is not 'transformer'.

Lucien

[ElectriciansForums.net] Mystery Item thread.... What am i?[ElectriciansForums.net] Mystery Item thread.... What am i?[ElectriciansForums.net] Mystery Item thread.... What am i?
 
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Nope, not a choke. There is something a bit choke-ish and a bit transformer-ish about the way it works, yet it is neither a transformer nor a choke.
 
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Lucien Nunes said:
Nice bit of traditional Soviet technology there Dark, what actually failed on it? Most of their industrial stuff seems to go on almost for ever.
Click to expand...
50 plus years of a early hard mould plastic plunger eventually wears it away, its possible to probably do a makeshift repair but as its fuctio is braking related its best to replace for sake of £50 ....Electrically still sound.
 
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