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US 4,489,523 AGranted
Apparatus for regrinding step drills
AssigneeThe Boeing Company
InventorFrank R. Webster
Life of this patent
Estimating the term…
Abstract
A drill bit pointer machine includes a laser micrometer for measuring the pilot diameter and transmitting the data to a microprocessor through a digital readout. The microprocessor is programmed to manipulate the data and define the operation of a stepper motor which produces the required motion necessary for adjusting the machine workhead stop for utilization in the subsequently performed semi-automatic grinding cycle.
Claims1
A drill bit pointer machine having a workhead stop for regrinding step drills comprising in combination:
- a microprocessor;
- a digital readout device;
- a laser optical microscope for measuring pilot diameter of said step drills and coupling pilot diameter data to said microprocessor through said digital readout device;
- and,
- a stepper motor responsive to said microprocessor for adjusting said workhead stop to control said regrinding of said step drills.
2 more elements
Dependencies are inferred from the claim text.