Geometrical instruments – Area integrators – Electrical
Patent
1975-06-26
1976-10-19
Aegerter, Richard E.
Geometrical instruments
Area integrators
Electrical
33147H, 3320319, 3320316, 33176, G01B 520
Patent
active
039862674
ABSTRACT:
A tire measuring instrument is disclosed for measuring the diameter and bead-to-bead dimension of a tire casing and correlating such measurement to a particular retreading matrix. A frame carries a plurality of rotatable cylinders, the periphery of each cylinder containing designations of selected retreading matrices. A carriage is mounted on the frame for translational movement relative to the cylinders. The carriage carries a plurality of indicators, each indicator being associated with a particular nominal tire size. A pair of legs are pivotally mounted on the frame and include pulley-carrying outer foot portions extending into a tire measuring zone. A plunger is attached to the carriage and is mounted for translational movement. The lower end of the plunger extends between the legs and into the tire measuring zone for engaging the crown of a tire being measured. A measuring cable is anchored to the plunger and extends across the tire measuring zone and around the leg-mounted pulleys for engaging both side walls of a tire being measured. A driving wheel is mounted on each cylinder axle. An indexing cable is mounted on the frame for resilient displacement and is wrapped around the driving wheels. The indexing cable is operably coupled to the measuring cable so as to be displaced in response to shifting movement of the plunger and deflection of the measuring cable during tire measurement. In this fashion, the cylinders are rotated by an amount related to the bead-to-bead dimension of the tire. The carriage is translatable in response to shifting of the plunger by an amount related to the diameter of the tire. As a result of the combined translation of the indicator and rotation of the cylinders the indicator pertaining to the tire being measured provides an immediate and direct read-out of a proper retreading matrix.
REFERENCES:
patent: 2650437 (1953-09-01), Glynn
patent: 3633279 (1972-01-01), Frazier
Aegerter Richard E.
Little Willis
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