Geometrical instruments – Gauge – Screw thread
Patent
1978-01-23
1980-05-13
Little, Willis
Geometrical instruments
Gauge
Screw thread
33143M, G01B 338, G01B 340
Patent
active
042021090
ABSTRACT:
An attachment is slidably engaged with the blade of a caliper-type measuring device. The attachment carries a contact element which is sized to be inserted into the groove between adjacent threads and abut each thread. The pitch diameter of threads are measured by opposed attachments carried by the respective blades of the calipers. Axial alignment of the contact member within the thread groove is accommodated by sliding arrangement between the attachment and the blade.
REFERENCES:
patent: 2246066 (1941-07-01), Rothe
patent: 2941304 (1960-06-01), Man
patent: 3491452 (1970-01-01), Johnson
Flickinger Don J.
Little Willis
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