Diameter gage for rings and round objects
First Claim
1. A gage apparatus for determining uniformity in the diameter of flexible rings and generally round objects based on the ratio of the circumference of a circle to its diameter comprising;
- a support for receiving and supporting an annular ring or generally round object,diametrically expansible and retractable ring engagement means on sad support engagable with a circumference of the ring or generally round object,lever means pivotally mounted on said support and operatively connected with said ring engagement means to pivot upon expansion or retraction thereof,controlled pressure means operatively connected with said lever means for controlling the pressure exerted on a circumference of the object being measured by said ring engagement means,indicator means on said support operatively connected with said lever to indicate the amount of pivotal movement thereof,said ring engagement means and said indicator means being spaced relative to the pivot point of said lever such that the ratio of the distance from the pivot point to the lever connection with said ring engagement means is pi (3.1416) times the distance from the pivot point to the lever connection with said indicator means whereby circumferential measurements are converted and indicated as diametric measurements, andsaid indicator means may be set to zero with said ring engagement means engaged on the circumference of a master ring of a known precise diameter and when said ring engagement means is engaged on the circumference of the object to be measured, the difference between the known diameter and the diameter of the object being measured will be indicated.
1 Assignment
0 Petitions
Accused Products
Abstract
A gage apparatus for determining uniformity in the inside or outside diameter of flexible rings and generally round objects based on the ratio of the circumference of a circle to its diameter. A spring biased lever pivotally mounted on a support plate has a releasable clamp at one end. An indicator is engaged with the lever to indicate the amount of pivotal movement thereof. A thin flexible band of stiff material has one end secured to a spool on the support plate and a portion of its length passes slidably through the clamp and forms a circular loop and its terminal end is fixed to the clamp. The ratio of the distance from the pivot point of the lever to the connection with the band is pi (3.1416) times the distance from the pivot point to the connection with the indicator whereby circumferential measurements are converted and indicated as diametric measurements. As the lever pivots, the diameter of the circular looped portion of the band will increase or decrease.
7 Citations
17 Claims
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1. A gage apparatus for determining uniformity in the diameter of flexible rings and generally round objects based on the ratio of the circumference of a circle to its diameter comprising;
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a support for receiving and supporting an annular ring or generally round object, diametrically expansible and retractable ring engagement means on sad support engagable with a circumference of the ring or generally round object, lever means pivotally mounted on said support and operatively connected with said ring engagement means to pivot upon expansion or retraction thereof, controlled pressure means operatively connected with said lever means for controlling the pressure exerted on a circumference of the object being measured by said ring engagement means, indicator means on said support operatively connected with said lever to indicate the amount of pivotal movement thereof, said ring engagement means and said indicator means being spaced relative to the pivot point of said lever such that the ratio of the distance from the pivot point to the lever connection with said ring engagement means is pi (3.1416) times the distance from the pivot point to the lever connection with said indicator means whereby circumferential measurements are converted and indicated as diametric measurements, and said indicator means may be set to zero with said ring engagement means engaged on the circumference of a master ring of a known precise diameter and when said ring engagement means is engaged on the circumference of the object to be measured, the difference between the known diameter and the diameter of the object being measured will be indicated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17)
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10. A gage apparatus according to claim including
a guide member secured on said support adapted to slidably receive a portion of said band and guide said band into a circular configuration to engage the circumference of a ring or other object to be measured.
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13. A gage apparatus according to claim including
an eccentric member pivotally mounted beneath said lever near its outer end and movable between an engaged position to maintain said lever in an intermediate position for setting the gage to a master ring and a disengaged position to serve as a down stop when said gage is used.
Specification