Title: Device for measuring the pitch diameter of gears

Abstract: A device for use in measuring the pitch diameter of gears has first and second pin-holding units movable along a straight, inclined pathway with means to lock one unit thereto against movement in a predetermined position relative to a gauge. Each pin extends upwardly from its unit and is backed by a V-shaped projection. A support is adjustable to position a gear in a plane transversely of the exposed ends of the pins with one pin seated between a pair of gear teeth and with a diametrically opposed pair of gear teeth positioned to have the other pin seated between them when the other unit is moved in the appropriate direction. The pins are dimensioned to seat against the pitch line of the teeth against which they are seated with the distance between the pins reflected by the gauge to give the relation of the actual pitch diameter to the ideal.

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Inventors: Brookfield, Richard A. (Newton, MA, US)

Application Number: 543158
Filing Date: 1975-01-22
Publication_date: 1976-09-14
Assignee:
Primary Class(es): 33/501.14 33/501.18
Other Classes:
US Patent Ref:

1281805	Oct, 1918	Metzger et al.	33/147.
2295206	Sep, 1942	Fraumann et al.	33/179.
2367004	Jan, 1945	Chitwood	33/179.
2445402	Jul, 1948	Malmberg	33/179.
2623295	Dec, 1952	Orlandi	33/179.
2728144	Dec, 1955	Nilsson	33/147.
3771229	Nov, 1973	Reef	33/147.

Other Refs:
Primary Examiner: Aegerter, Richard E.
Assistant Examiner: Thaler, Michael H.
Attorney: