Measuring and testing – Miscellaneous
Patent
1996-11-27
1998-02-03
Dombroske, George M.
Measuring and testing
Miscellaneous
33536, G01F 1514, G01B 356
Patent
active
057146861
ABSTRACT:
This invention relates to an instrument for measuring the degree of an internal chamfer and comprises a cylinder (5) which is moved axially within a housing (1) and having three equally spaced longitudinal slots (16) therethrough; a knurled handle (3) for sliding the cylinder within the housing; a set screw (4) in the handle for selectively locking and unlocking an indicator gage to the cylinder; a piston (6) slidably disposed in the cylinder and contacting the indicator gage point (7); a spring (11) biasing the piston from the indicator stem (15); three equally spaced link blades (8) extendable through the corresponding slots in the cylinder of which one end of each link blade is pivotally mounted to piston and the other end of the link blade of the respective set is pivotally attached to one end of one corresponding blade of a set of three measuring blades (9) and the other end of the respective blade of the set of measuring blades being pivotally fastened to the lower end (10) of the cylinder which is reduced to the same diameter as the piston. Three dog point set screws (12), equally spaced, are aligned with corresponding slots in the cylinder. A plate (13) having three radial slots in alignment with the three sets of link and measuring blades is disposed on lower end of housing.
REFERENCES:
patent: 2472306 (1949-06-01), Minuto
patent: 2642670 (1953-06-01), Dow
patent: 2975524 (1961-03-01), Field
patent: 4905378 (1990-03-01), Culver et al.
patent: 5251381 (1993-10-01), Turner et al.
patent: 5410818 (1995-05-01), Chalk
Amrozowicz Paul D.
Dombroske George M.
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