The micrometer heads are large diameter high precision ones. Commonly found in some sort of mounting frame. Often used as part of special test equipment. Bench micrometers are probably the most common commercially supplied items using these. Very expensive new.

The device with a micrometer and sprit level is a clinometer. Set it on a nominally level surface, adjust the micrometer so the level bubble is central, turn through 180° and red-adjust the micrometer until the bubble is again central. Movement distance of the micrometer lets you calculate the tilt of the surface.

Last picture in the album is a precision AvoMeter. Probably very rare now so may have collector value. Generally used with other equipment as part of electrical calibration set-ups.

Thermocouple test set probably came from the same lab as the Avo.

Four magnetic bases of the type commonly used to hold indicators et al. Medium quality when new. Commodity things these days. Maybe £10 – £20 'cos they have nice boxes.

Rethreading files have teeth the same shape as the specified thread so a damaged thread can be filed back to shape close enough to allow a nut to run down it or a bolt to be screwed in. Bodgers tool but sometimes essential. Can be found new for maybe £10 ish, yours are proper brand names so probably better quality. Box should give sizes.

The Mitutoyo indicator would be used in a test stand to verify whether components are within specifications. Two moveable arms set the limits. If the indicator needle is between them the component is OK. High quality meter but not of great value now. Mitutoyo still supply such things so a search should find a representative new price. Maybe get 10-15% of that on E-Bay.

Clive

Edited By Clive Foster on 10/09/2021 10:30:02

The micrometers are Drum types. The large diameter barrel allows the graduations to be wide apart, so that they can be subdivided, probably into tenths of a thou instead of thous on an normal micrometer barrel.

Possibly, they came from Height Micrometers.

The Budenberg tester is used to calibrate pressure gauges.

The various pressures are obtained by loading a disc of known specific weight onto the plunger with the gauge to be calibrated fitted to the connection. The pump is then used to increase the pressure, until the weight just "floats"

This allows the gauge reading to be compared with what it should be, and corrected if need be..

This procedure is repeated for each increment of the gauge graduations; probably in 10 psi steps.

It is very good piece of kit, if all the weights are there. There should be at least ten, to cover from 10 psi upto 100 psi.

The electrical device, Pye Scientific Instruments is used to check Thermocouples, to measure their ouput, and again, to calibrate a electronic temperature measuring set up (Thermocouple connected to a sensitive moving coil meter, measuring milliVolts, but probably graduated in degrees C. )

All this stuff, including the Toolmakers cabinet should be quite valuable. Most of it would have come from a Standards Room, or Cakibration Room, and would have been very carefully looked after..

The kind of kit that one would be a joy to own, but have no actual immediate use for it! (On a shelf, I have two drum micrometers for which I have yet to find a use )

Howard  Fat fingers strike again!

Edited By Howard Lewis on 10/09/2021 19:14:55

Edited By Bo’sun on 10/09/2021 21:54:38

The Bundenburg dead weight tester should have a matching set of weights. normally thes are paired to the tester. Unfortunatly they often go missing…
With the weights it has some value.

Robert G8RPI.

1985 was the last time I used a dead weight pressure tester.

Martin C