Abstract:
An internal bore gauge comprises a body portion 12 having radial slots 20 carrying a pair of diametrically opposed anvils 22 capable of controlled movement in the radial direction, the anvils 22 having rounded end faces 36 of radius of curvature close to the radius of the bore being measured. By having only two anvils, and give the bore contacting faces of the anvils a radius of curvature close to the radius of the bore being measured, range of movement of the anvils, and therefore the range of measurement of the device, can be increased since any tilting of the gauge in the bore is compensated for by the curved faces of the anvils.
Abstract:
An apparatus for indicating inside dimensions comprises a base plate (11) and a supporting plate (12) spaced above the base plate for the object to be measured. Aligned rails (34) displaceable in relation to each other are provided on the base plate (11) and extend along slots (15) in the supporting plate (12), said slots extending radially in relation to a centre. Measuring arms (35) project upwards from the rails through the slots which also form guides for securing supports for the object to be measured on the supporting plate (12). The rails are operatively connected to indicating members (43) for transmitting measuring motion from the measuring arms to the indicating members.
Abstract:
A gauging head, for use in measuring internal dimensions of a bottle neck bore, comprises a probe (10) which is arranged to be introduced a predetermined distance into the bore. The probe bears eight radially movable gauging elements (16, 20) positioned at the opposite ends of four diameters in a common plane. Each element comprises a blade (16) which is accommodated for radial movement in a slot (18) of the probe. A cam face (26) presented on an arm (22) extending from the blade is engaged by a transducer probe (28) for sensing radial movements of the gauging element. In use of the head, signals from the transducer probes are recorded at each of a plurality of different axial positions during withdrawal of the probe from the bore.
Abstract:
A gauge for measuring out-of-roundness of a circular part has a table (40) upwardly from which project 3 posts (72, 74 and 76) arranged substantially at the apices of an equilateral triangle with the post (76) moveable toward and away from an imaginary line extending between post (72) and post (74). A dial indicator (70) is responsive to movement of post (76) to detect out-of-roundness as a part (10) resting on the table and in engagement with the posts is rotated relative thereto.