Hand held pitch diameter gauge

A pitch diameter gauge comprising:

• a. a frame including an elongated frame member and a stationary arm connected to said frame member and extending perpendicular outward therefrom;
• b. an elongated adjustable arm connected to and moveable along said elongated frame member and including means for locking said adjustable arm to said elongated frame member in a desired location, with said adjustable arm extending perpendicular outward from said elongated frame member from the same side as, parallel to and spaced from said stationary arm;
• c. indicator means mounted to one of said arms;
• d. a single ball contact connected by moveable means to said indicator means to permit movement in a plane parallel to said arms and along a line perpendicular to both arms, whereby movement of said single ball contact is detected by said indicator means;
• and
• e. a base pivotally mounted near an end of the other of said arms and having a pair of spaced ball contacts mounted thereto along a surface opposite said associated arm, with said single ball contact and said pair of ball contacts either both oriented toward each other or both oriented away from each other, with said pair of ball contacts positioned along a line parallel to a longitudinal axis of said associated arm, with said base pivotable about an axis perpendicular to a plane parallel to said first and second arms, and with said pivot axis of said base located in a line extending perpendicular to said first and second arms through said single ball contact and passing between said pair of ball contacts.

A pitch diameter gauge comprising:

• a. a cylindrical body having a closed end and an outwardly biased, moveable center shaft;
• b. a moveable arm fastened to said center shaft and moveable therewith, said moveable arm extending perpendicular outward therefrom;
• c. an adjustable arm connected to and moveable along said body and including means for locking said adjustable arm to said body in a desired location, with said adjustable arm extending perpendicular outward from said body from the same side as, parallel to and spaced from said moveable arm;
• d. a single ball contact connected to an end of said moveable arm and oriented in a plane parallel to said arms and along a line perpendicular to both of said arms;
• e. a base pivotally mounted near an end of said adjustable arm and having a pair of spaced ball contacts mounted thereto along a surface opposite said adjustable arm, with said sing)e ball contact and said pair of ball contacts either both oriented toward each other or both oriented away from each other, with said pair of ball contacts positioned along a line parallel to a longitudinal axis of said adjustable arm, with said base pivotable about an axis perpendicular to a plane parallel to said arms, and with said pivot axis of said base located in a line extending perpendicular to said arms through said single ball contact and passing between said pair of ball contacts;
• and
• f. indicator means connected to and detecting movement of said moveable arm and said single ball contact mounted thereto as said center shaft moves within said body.