CALLIPER Russian patent published in 2016 - IPC G01B5/12 G01B3/22 F41A21/18 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring devices and can be used for measurement of diameters at fields and to cuts of channel gun barrels and deep holes. Calliper comprises housing 1 accommodating rod 2. To housing 1 are rigidly fixed by pin 3 bearing tube 4 and screw 5 casing 6 of indicator. Leg 7 of indicator is fixed by screw 8 via split bushing 9 in required position. On supporting pipe 4 is rigidly fixed measuring head 10 with functional cone angle 57°7′. In housing 1 there are slots, limiting excessive 2 rod stroke due to handle-limiter 11. On rod 2 there is wedge 12 with cone angle 57°7′, fixed by nut 13 and lock nut 14. On measuring head 10 there are protrusions 15 for direct measurement of diameters and guide protrusions 16 for orientation of device at fields and to cuts.

EFFECT: technical result obtained by implementation of invention consists in possibility of measurement of actual sizes at fields and to cuts channel gun barrels and deep holes.

1 cl, 3 dwg