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Edwin Waddington
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Length-Measuring Instruments Using Mechanical Means
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Abstract
14,086. Waddington, E. June 22. Calliper and like gauges.-Callipers and like instruments have joints which can be locked by means of a lever A, which is either fixed to a screw, as shown, or screws on a loose bolt forming the pivot of the joint.
GB190414086D1904-06-221904-06-22A Locking Lever for Compasses, Calipers & like Instruments
ExpiredGB190414086A
(en)