Geometrical instruments – Gauge – Circular size
Patent
1997-07-16
1999-11-23
Roskoski, Bernard
Geometrical instruments
Gauge
Circular size
33783, 33792, G01B 300
Patent
active
059877642
ABSTRACT:
A gage for measuring the external threads of a threaded body has a segment housing formed from a housing body. The housing body has a generally U-shaped cross section with a bottom extending between a pair of opposite, upright sidewalls so that a channel with a longitudinal axis is defined. First and second gage segments are configured to engage the threads of the threaded body when the threaded body is positioned between the first and second segments and the first and second segments are closed together. The first gage segment is fixed to the housing body, and the second gage segment is received within the channel of the housing body. The second gage segment moves linearly within the channel along the longitudinal axis to allow the first and second segments to be separated for insertion of the threaded body between the first and second segments. This also allows the first and second segments to be closed together for engagement with the threaded body. An indicator having a movable indicator shaft that actuates the indicator is mounted to the housing body. The indicator shaft is spring loaded so that the indicator shaft projects into the channel of the housing and engages the second gage segment, urging the second gage segment within the channel into engagement with the threaded body.
REFERENCES:
patent: 2609614 (1952-09-01), Johnson
patent: 2611970 (1952-09-01), Johnson
patent: 2725637 (1955-12-01), Johnson
patent: 3270424 (1966-09-01), Johnson
patent: 3318011 (1967-05-01), Johnson
patent: 3353277 (1967-11-01), Johnson
patent: 3354553 (1967-11-01), Heldmaier
patent: 3358376 (1967-12-01), Johnson
patent: 5056238 (1991-10-01), Chi
Johnson Ring-Snap, The Johnson Gage Company brochure, pp. 2-3.
Thread Dimensional Safety, The Johnson Gage Company brochure.
Variables Type External Thread Gaging System, The Johnson Gage Company brochure.
External Thread Gaging Systems, ITW Zero Systems brochure.
Bradley James E.
Roskoski Bernard
LandOfFree
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