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US 4,063,362 AGranted
Measuring instrument
AssigneeROLLS-ROYCE plc
InventorsClifford Roy Amsbury, Eric Warren
Life of this patent
Estimating the term…
Abstract
A measuring instrument of the caliper type which can be extended out, by means of extension pieces, to cover a wide range of linear dimensions. A mechanical scale gives the most significant figures of the measurement and the scale indicates a different range to match each extension piece employed. An electrical circuit gives the least significant figures of the measurement and the figures are presented together so that they can be read as a composite reading.
Claims8
An instrument for measuring linear dimensions comprising:
- a pair of anvils for contacting a work piece across a dimension to be measured;
- a longitudinal bar extending the length of the instrument;
- a first of said anvils being secured to said bar;
- a carriage member movable along said bar;
- detent means operatively positioning said carriage on said bar at any one of a series of equally spaced positions along said bar, said positions corresponding to units of measurement relative to said first anvil;
- a second of said anvils being mounted on said carriage for movement parallel to a longitudinal length of said bar over a distance of at least one of said units;
- a first means provided for indicating the position of said carriage relative to said first anvil
- a second means for indicating the position of said second anvil relative to said carriage, said second means being electronically operable, said first means and said second means being in said units of measurement and having the indicating portions thereof juxtaposed to provide a composite indication of measurement;
- said longitudinal bar comprising a first portion on which said carriage is movable over a first range of said units of measurement, and a series of extension portions, each capable of being detachably secured respectively to the first portion of said bar and to said first anvil whereby said first anvil is capable of being positioned at any one of a series of different distances from said first portion dependent upon the one of said extension portions used to give the instrument a facility to measure a series of different ranges of said units of measurement.
6 more elements
An instrument for measuring linear dimensions comprising:
- a pair of anvils for contacting a work piece across a dimension to be measured;
- a longitudinal bar extending the length of the instrument;
- a first of said anvils being secured to said bar;
- a carriage member movable along said bar;
- detent means operatively positioning said carriage on said bar at any one of a series of equally spaced positions along said bar, said positions corresponding to units of measurement relative to said first anvil;
- said longitudinal bar comprising a first portion on which said carriage is movable over a first range of said units of measurement, and a series of extension portions, each capable of being detachably secured respectively to the first portion of said bar and to said first anvil whereby said first anvil is capable of being positioned at any one of a series of different distances from said first portion dependent upon the one of said extension portions used to give the instrument a facility to measure a series of different ranges of said units of measurement;
- a second of said anvils being mounted on said carriage for movement parallel to a longitudinal length of said bar over a distance of at least one of said units;
- a first means provided for indicating the position of said carriage relative to said first anvil, said first means for indicating the position of the carriage relative to the first anvil comprising a member carrying a series of scales and means for automatically selecting the appropriate scale, said selection means being operable upon securing the selected extension portion to the first portion of the longitudinal bar whereby the select the appropriate scale for the selected extension portion;
- a second means for indicating the position of said second anvil relative to said carriage, both of the indications of said first means and said second means being in said units of measurement to thereby indicate the dimension to be measured in a form of a composite indication.
6 more elements
Dependencies are inferred from the claim text.