Michael G
26th June 2013, 03:59 PM
A few days (weeks?) ago someone mentioned measuring small forces. It may have been in conjunction with indicators and measuring plunger forces - anyway, this is one way to do it. (NB that is a cm scale in both pics) Would have posted this earlier but...*
This is a Correx force gauge, Swiss made. The most common use for these in the past would have been measuring/ checking lift off forces on relays + slip ring contacts. Now that a lot of switching is done digitally there probably isn't as much call for something like this. This one goes from 10 to 100g in either direction and has a maximum force needle for catching instantaneous readings.
274420
Not sure I haven't mentioned this one already, but while making up the worm wheel hob it got used, so it gets a mention now. It's a gear tooth vernier - dated prior to 1950 I think (made in the UK). These days digital versions are available but an old vernier scale instrument is a thing of beauty. Finding one was hard, as there are a lot around for 2DP to 20DP but this one is sized for 4DP to 40DP; more my sizes. They are used for measuring tooth thickness. The vertical scale is for setting a moveable stop and the horizontal scale is for measuring the tooth thickness. There are corrections applied to the measurements to allow for gear and tooth size as these will change the reading slightly.
274419
Michael
*It was decided that we had to "get away for a few days". Funny how I can't take my shed with me but the books, crosswords and knitting are fine.
This is a Correx force gauge, Swiss made. The most common use for these in the past would have been measuring/ checking lift off forces on relays + slip ring contacts. Now that a lot of switching is done digitally there probably isn't as much call for something like this. This one goes from 10 to 100g in either direction and has a maximum force needle for catching instantaneous readings.
274420
Not sure I haven't mentioned this one already, but while making up the worm wheel hob it got used, so it gets a mention now. It's a gear tooth vernier - dated prior to 1950 I think (made in the UK). These days digital versions are available but an old vernier scale instrument is a thing of beauty. Finding one was hard, as there are a lot around for 2DP to 20DP but this one is sized for 4DP to 40DP; more my sizes. They are used for measuring tooth thickness. The vertical scale is for setting a moveable stop and the horizontal scale is for measuring the tooth thickness. There are corrections applied to the measurements to allow for gear and tooth size as these will change the reading slightly.
274419
Michael
*It was decided that we had to "get away for a few days". Funny how I can't take my shed with me but the books, crosswords and knitting are fine.