Kabushiki Kaisha Mitutoyo Seisakusho

Kozo Shibukawa

Goro Nishikata

Two-leg vernier calipers characterized in that it consists of a main beam assembly comprising two legs parallel to each other, a vernier assembly supported on the main beam assembly and separate measuring jaws for the main beam and the vernier fitted thereto; each measuring jaw can be selected depending on the type of instrument to be assembled, thereby making it possible to standardize the main beam assembly and the vernier assembly; and accordingly the main beam assembly and the vernier assembly can be made of different materials from the measuring jaws; and the manufacturing method of this two-leg calipers, in which the measuring jaws are fixed at right angles to the two legs of the main beam and the vernier, thus rendering it needless to fit together their measuring surfaces after assembling.

Two-leg vernier calipers and its manufacturing method

A vernier caliper includes a main beam body consisting of two round rods parallel to each other and connected together at one end by a jaw, and at the other end by a rear frame. A vernier is supported freely and slidably on the rods. The rods can be hollow and can have their respective ends inserted into openings of the jaw and rear frame and secured in the openings with adhesive, solder, or screws. A rack can be formed on one of the rods to drive, for example, a dial indicator, and graduations can be provided on a rod to read the measurement taken with the vernier. This construction provides a more accurate vernier caliper which can be precisely assembled without grinding, for example, jaw faces, after assembly to calibrate the caliper.

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Kawasaki, Japan

Kozo Shibukawa