METHOD OF MEASUREMENT OF PARAMETERS OF THREAD AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 1996 - IPC

FIELD: measurement technology. SUBSTANCE: threaded roller is put and based on measured thread, it is rolled over measured thread with measurement of span of its radial beats. Average diameter of thread is determined by sum of average diameter of threaded roller and span of its beats. To determine pitch of thread one measures axial displacement of threaded roller for specified number of rolls and pitch is found by average diameter of measured thread, axial displacement and number of rolls. Length of thread is found by sum of length of thread of threaded roller and its axial displacement when span of its beats achieves specified threshold. Device for implementation of method has drive with shaft 3 and handle 4 mounted on base 1 in support 2, carrier 5 put on shaft 3 with clearance and capability of relative movement, ball 6 loaded with spring 9, arrester 11, threaded roller 12, transducers 13, 16 of linear movements. Threaded roller 12 is placed on to measured thread with the use of arrester 11 and is rolled over measured thread with the aid of drive. In this case transducer 13 measures span of beats during each revolution of threaded roller 12. EFFECT: expanded functional capabilities: measurement of average, diameter, diameter reduced to average, pitch and length of thread.