Patent · US Expired

Device for measuring feed movement

US4819546A · kind A · utility

10Cited by

11References

6Claims

0Family size

Assignee

DR. JOHANNES HEIDENHAIN GMBH · DE

Inventors

Alfons Ernst · Traunreut, DE
Alfons Spies · Munich, DE

Key dates

Filing date	Apr 7, 1987
Grant date	Apr 11, 1989
Priority date	—
Expiry date	Apr 7, 2007

Classification

Technology area (CPC G)Physics
CPC primaryG01B7/02
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A measuring system is disclosed which is integrated into a feed arrangement in such a way that the structural size of the feed arrangement is not increased significantly. In the disclosed embodiments, the feed arrangement includes a compressed air cylinder which includes a hollow profile and a piston movable within a cylinder defined by the profile. In one embodiment, a measuring scale is positioned within a groove formed within the hollow profile and this measuring scale defines a magnetic measuring graduation which is scanned by a scanning unit accommodated in the piston of the air cylinder.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.