Watt's end measuring machine
1776
Maudslay 's Lord Chancellor bench micrometer
1805
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
Hirth minimeter
circa 1920; 1907
Micro 2000 electronic digital metric micrometer
circa 1980
Automatic micrometer
1850-1900
Stroboflash, Stroboscope
1950s-1960s
Circular instrument dividing engine
1778
early metric micrometer
1878
"0-2" Bench Micrometer
1944
digital readout micrometer
1893
Adjustable square
circa 1960
Pocket sheet metal gauge
1878-1867 (design)
Steel straight edge
1969
Drawing of L. Palmer's micrometer or 'system palmer'
1848-original
Pocket micrometer
circa 1885
Metal factors ruler incorporating sliding caliper marked Thomas Bradburn and Sons
Frame micrometer no. 30 by Troughton and Simms
1826-1894
Ship's plate thickness measuring gauge with vernier scale.
not known
Spring caliper, an early method of measuring diameters
N. K.
Clockmaker's screw micrometer, by Gustav Horstmann
1856
Circular Instrument Dividing Engine
1919
Gap pattern thickness gauge
1869-1921
Miniature micrometer by Borletti of Milan in a small pocket
Bench type micrometer for rolling mill gauging
1901
Lindley type extensometer for measuring the extension of samples under test strain
1950-1970
Lindley type extensometer
1940-1960
High magnification fiducial indicator
1959
Large Vernier Calliper for Manufacturing Large Calibre Weapons, 1826-1867
1826
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
Vernier caliper for workshop use
circa 1830
Four photographs of Ramsden's dividing engine
Fisher sub-sieve sizer
0" to 4" micrometer
Surface plate; very smooth surface produced by lapping
1919
digital readout micrometer
pat 1893.
Slocomb digital micrometer
1920-1939
Straight line dividing engine, Ramsden type
Bursting tester no LT1550
1960-1969
Accessories for a horizontal optical comparator
frame micrometer
1826-1894
Experimental screw diameter measuring machine
1915
Vernier External Callipers, 1800-1825
1800-1825