Geometrical instruments – Gauge – Comparator
Reexamination Certificate
1999-03-25
2001-10-09
Fulton, Christopher W. (Department: 2859)
Geometrical instruments
Gauge
Comparator
C033S645000, C033S549000
Reexamination Certificate
active
06298568
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to mechanical measurement apparatus.
DESCRIPTION OF THE RELATED ART
Feeler gages are well known. A feeler gage is a body having at least one predetermined dimension that is used as a standard. The feeler gage is inserted into an opening or gap that is to be measured. A determination is made as to whether the feeler gage fits into the opening or gap. If the gage is capable of insertion, then the dimension of the opening or gap is greater than that of the gage; if the gage is not capable of insertion, the dimension of the opening or gap is less than that of the gage. A first gage that is smaller than the opening and a second gage that is larger than the opening define a range of possible actual values for the dimension of the opening. By testing additional gages having intermediate sizes, it is possible to reduce the range of possible values of the dimension to be within any desired maximum tolerance.
In many applications, it is desirable to measure dimensions that are inaccessible. A method and device are desired for handling and insertion of feeler gages in locations that are difficult to reach manually.
SUMMARY OF THE INVENTION
The present invention is an apparatus for holding a feeler gage, including a shaft having an end to which the feeler gage is attached, and a fixture that aligns the shaft with an opening into which the feeler gage is inserted.
REFERENCES:
patent: 2582679 (1952-01-01), Carroll
patent: 2861347 (1958-11-01), Tarnik
patent: 4862598 (1989-09-01), Barlow et al.
patent: 5408755 (1995-04-01), Russell
Johnson Charles E.
Pongracz David John
Rush Nancy Susan
Duane Morris & Heckscher LLP
Fulton Christopher W.
Koffs Steven E.
Lucent Technologies - Inc.
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