Maudslay 's Lord Chancellor bench micrometer
1805
Watt's end measuring machine
1776
Palmer's micrometer (replica)
circa 1848
Dividing engine for making sextants and octants
Made late 1700s, modified 1800s
Micrometer type mechanical comparator
1855
Whitworth standard wire gauge
1869 to 1897
Lucien Sharpe sheet metal gauge
circa 1850
Set of Johansson gauge blocks, c 1900.
1896-1918
Micro 2000 electronic digital metric micrometer
circa 1980
Hirth minimeter
circa 1920; 1907
Stroboflash, Stroboscope
1950s-1960s
Automatic micrometer
1850-1900
early metric micrometer
1878
Circular instrument dividing engine
1778
Adjustable square
circa 1960
digital readout micrometer
1893
Pocket sheet metal gauge
1878-1867 (design)
Drawing of L. Palmer's micrometer or 'system palmer'
1848-original
Spring caliper, an early method of measuring diameters
N. K.
Steel straight edge
1969
Frame micrometer no. 30 by Troughton and Simms
1826-1894
Ship's plate thickness measuring gauge with vernier scale.
not known
Gap pattern thickness gauge
1869-1921
Metal factors ruler incorporating sliding caliper marked Thomas Bradburn and Sons
Lindley type extensometer for measuring the extension of samples under test strain
1950-1970
Pocket micrometer
circa 1885
Miniature micrometer by Borletti of Milan in a small pocket
Bench type micrometer for rolling mill gauging
1901
Circular Instrument Dividing Engine
1919
Vernier caliper for workshop use
circa 1830
Clockmaker's screw micrometer, by Gustav Horstmann
1856
Large Vernier Calliper for Manufacturing Large Calibre Weapons, 1826-1867
1826
Lindley type extensometer
1940-1960
High magnification fiducial indicator
1959
Surface plate; very smooth surface produced by lapping
1919
Direct digital display micrometer made by Brown and Sharpe
1922-1928
Horstmann adjustable thread caliper gauge for M8 threads
Robey-Smith bevel gear cutting machine
Four photographs of Ramsden's dividing engine
Fisher sub-sieve sizer
Shadow protractor in case
Straight line dividing engine, Ramsden type
Accessories for a horizontal optical comparator
0" to 4" micrometer
frame micrometer
1826-1894
digital readout micrometer
pat 1893.
Whitworth pitch-measuring machine, 1902
1902
internal and external gauges
1835-1865
Slocomb digital micrometer
1920-1939
