Another what is it?

[Nick Clarke 3Participant @nickclarke3]

A couple of days ago I was given some items by the son of a late engineer – A foot candle meter with a dead cell, a handheld mechanical tachometer with three ranges 0-500rpm, 0-5000 rpm and 0-50000rpm and this which I don't know the purpose of.:-

It seems to measure force in grams when the pointer which is ball ended is pressed from side to side, it has an adjustable pointer but it cannot be used like that as there is no means of mounting it and no signs of there ever has been. It must be hand held and if so it cannot produce an accurate reading as far as I can see. The tool maker who originally owned it was born in 1918 and was working to within a couple of years of his death in 2009 if that time window helps. 

Edited By Nick Clarke 3 on 04/10/2021 12:02:17

Edited By Nick Clarke 3 on 04/10/2021 12:02:47

[Nick Clarke 3Participant @nickclarke3]

[BizibilderParticipant @bizibilder]

Correx Gauge – they still make 'em!!: Here

Edited By Bizibilder on 04/10/2021 12:07:14

[Robert Atkinson 2Participant @robertatkinson2]

A typical use is setting spring tension. You apply the force by hand to a position or stop dictated by the application. Another is to measure the tripping force of a sear or similar. There is a "tell-tale" pointer that stays at th maximum force reading.

Robert G8RPI.

[Jeff DaymanParticipant @jeffdayman43397]

I have one of these force gauges. It was part of my late father's tools, used in his 50 years as an automotive mechanic. It was originally bought in the 1970's to adjust the force of a particular sprung plunger in some models of carburetors. (on British cars as I remember)

[Clive HartlandParticipant @clivehartland94829]

If you have a spring loaded spindle, perhaps the main pivot of and optical level you use this gauge to test the turning force that is specified.

[Nigel Graham 2Participant @nigelgraham2]

Similar instruments were also used for testing relay contact springs.

[Dave HalfordParticipant @davehalford22513]

Similar to a BT/ GPO phones 3000 type relay spring tension gauge except those were set-able like a torque wrench and so had no dial.

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