What is it

[WindyParticipant @windy30762]

I got 2 of these at a car boot years ago would like to know what they are.

The manufacturer was taken over by AVO is it part of some test equipment or motor, generator.

One is brand new in a sealed package.

Evershed & Vignoles Ltd London W4

FBRX6A/H3/C

No H6532

Edited By Windy on 16/12/2019 12:28:01

Edited By Windy on 16/12/2019 12:28:38

[WindyParticipant @windy30762]

What is it

[BazyleParticipant @bazyle]

Does the axle rotate freely or just a part turn? Probably some kind of position sensor but a syncro normally has more connections. Have you put an ohm meter across it and rotated the shaft?

[Ex contributorParticipant @mgnbuk]

Possibly a tacho generator ? Colour & painted on markings look like those seen on military equipment, so maybe a TG from an engine to drive a tachometer remotely on an instrument panel. If you have a DC meter, try connecting to the terminals & spin the shaft to see if it generates a small voltage – the voltage will be proportional to the speed.

I've used similar looking devices for speed feedback on machine tool spindle motors – usually 60v/1000rpm in that application. No real current available, though – the windings are optimised to provide an accurate voltage with low ripple.

Nigel B

[Bill Davies 2Participant @billdavies2]

I know it can't be an aircraft flight display instrument, but the mounting looks similar. Also, the white markings on the side are similar to those on some instruments I have. I think they are written on after maintenance.

Bill

[Stuart BridgerParticipant @stuartbridger82290]

I would also say tacho generator and aviation related. Evershed were acquired in 1965, so it is older than that.

The part number does show up on google with FBRT1051015 as an associated part, bit no real detail other than hits on aviation part sourcing websites.

A search on ebay for "evershed tacho generator" does bring back some more modern variants

[WindyParticipant @windy30762]

Posted by mgnbuk on 16/12/2019 12:45:13:

Possibly a tacho generator ? Colour & painted on markings look like those seen on military equipment, so maybe a TG from an engine to drive a tachometer remotely on an instrument panel. If you have a DC meter, try connecting to the terminals & spin the shaft to see if it generates a small voltage – the voltage will be proportional to the speed.

I've used similar looking devices for speed feedback on machine tool spindle motors – usually 60v/1000rpm in that application. No real current available, though – the windings are optimised to provide an accurate voltage with low ripple.

Nigel B

              Just rotated it at about 500rpm on the lathe and got 1.47v.

Edited By Windy on 16/12/2019 13:38:40

[Speedy Builder5Participant @speedybuilder5]

Search results for: 101C031189

https://www.iso-group.com/NSN/6105-99-622-2336

NSN 6105-99-622-2336, 6105996222336
MOTOR,DIRECT CURREN

Federal Supply Classification

FSC 6105 – Motors, Electrical

National Item Identification Number

NIIN 996222336

Codification Country

United Kingdom

[Andrew TinsleyParticipant @andrewtinsley63637]

I believe it is a stelson, used to transmit rotation via a shaft to an inaccessible location. The rotation was usually a control input.

They were used on submarines and later to control very high voltage sources such as pressurised Van der Graafs and other linear accelerators.

I had some on a 3Mev Van der Graaf that I used to produce proton and alpha particle beams.

Andrew.

[Phil WhitleyParticipant @philwhitley94135]

I believe it is a DC motor or perhaps even a solenoid? start with 6V across it, probably runs fine on 12V. I can find no reference to a "stelson", and firmly believe that Mr Tinsley may be giving us a yuletide yanking!

Edited By Phil Whitley on 16/12/2019 15:51:37

[Keith LongParticipant @keithlong89920]

I think Andrew might be thinking of a "selsyn"

[Phil WhitleyParticipant @philwhitley94135]

Ah, a selsyn, I take it all back, not a wind up after all!

Selsyn or synchro is an electro-mechanical device used for the easy and precise transmission of angular data between two or more remote points. The readings may be provided in terms of mechanical position or as an electrical signal. Selsyn is a portmanteau of 'self-synchronous'.

TY Mr Long!

[Phil WhitleyParticipant @philwhitley94135]

Ah, a selsyn, I take it all back, not a wind up after all!

Selsyn or synchro is an electro-mechanical device used for the easy and precise transmission of angular data between two or more remote points. The readings may be provided in terms of mechanical position or as an electrical signal. Selsyn is a portmanteau of 'self-synchronous'.

TY Mr Long!

[Andrew TinsleyParticipant @andrewtinsley63637]

Hello Keith,

A very senior moment. I did intend to type selsyn. However I just happen to be doing some plumbing and using a stelson! A red face and apologies to all.

Andrew.

[Robert Atkinson 2Participant @robertatkinson2]

Speedy builder 5 is correct, t's a DC motor.

Robert G8RPI.

[Phil WhitleyParticipant @philwhitley94135]

you mean "Stilsons" pipe wrench!

[Nicholas FarrParticipant @nicholasfarr14254]

Posted by Phil Whitley on 16/12/2019 18:04:34:

you mean "Stilsons" pipe wrench!

Hi, or even Stillson, see Stillson wrench

Regards Nick.

Edited By Nicholas Farr on 16/12/2019 19:09:35

[Neil WyattModerator @neilwyatt]

No, yopu are all wrong.

He means a Stetson, he's a cowboy plumber…

Neil

[WindyParticipant @windy30762]

Have run it on 12v and seems to be ok will be seeing a club member who is into electrics and Vignoles

[Author]

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