Geometrical instruments – Gauge – Movable contact probe – per se
Patent
1992-03-19
1993-05-11
Will, Thomas B.
Geometrical instruments
Gauge
Movable contact probe, per se
33561, 33558, G01B 520
Patent
active
052089932
ABSTRACT:
A touch probe (10) has a housing (12) and stylus-supporting member (14) biased into a kinematic rest position relative to the housing (12) by a biasing mechanism. The biasing mechanism includes a first helical spring (40) which acts between a movable shuttle (44) and an intermediate member (48). The shuttle (44) is movable within a bore (46) and the position of the shuttle within the bore may be adjusted by the action of an adjusting screw (74). A second helical spring (42) acts between intermediate member (48) and the supporting member (14). The first spring (40) has a low spring rate and is pre-loaded such that the second spring (42), which has a high spring rate, will deflect first upon movement of the shuttle (44) or supporting member (14). Once the pre-load of spring (40) has been overcome the two springs (40,42) co-operate to act as a single spring whose spring rate is the sum of the reciprocals of the spring rates of springs (40,42). This provides adjustment of the biasing force with only a small movement of the shuttle (44) while simultaneously providing large deflections of the stylus-supporting member (14) opposed with a low rate of increase of biasing force.
REFERENCES:
patent: 4153998 (1979-05-01), McMurtry
patent: 4187614 (1980-02-01), Abiru et al.
patent: 4360973 (1982-11-01), McMurtry
patent: 4462162 (1984-07-01), McMurtry
patent: 4516327 (1985-05-01), Kanda et al.
patent: 4661037 (1987-04-01), Sugino et al.
patent: 4815214 (1989-03-01), Enderle et al.
patent: 4916825 (1990-04-01), Breyer
patent: 4934065 (1990-06-01), Hajdukiewicz et al.
patent: 5048194 (1991-09-01), McMurtry
patent: 5146691 (1992-09-01), McMurtry
Renishaw Metrology Limited
Will Thomas B.
LandOfFree
Touch probe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Touch probe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Touch probe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1342392