Mitutoyo Corporation

Hiroshi Koizumi

Kouji Sasaki

Seigo Takahashi

Yoshikazu Ooyama

Tamio Suzuki

Toru Kodato

Nobuyuki Shinpou

Mitsugu Sugawara

Toshiyuki Shirai

A scale for an apparatus for measuring displacement is enclosed. It comprises a scale member having a plurality of rectangular gratings arranged in a periodic pattern on the glass epoxy substrate and the like, a coating layer covered on the side of the scale member on which a plural of the rectangular gratings are formed, a scale cover (film layer) which functions as a protective layer, and a scale forming material bonded to the outer portion of the coating layer by an adhesive layer so as to keep contaminants, oil or particles from intruding between the rectangular grating and the adhesive layer, for example an adhesive tape and the like.

Scale on an apparatus for measuring displacement

An electrical capacitance instrument achieving high-volume production and a manufacturing method for the same. In a slide caliper detecting a change of electrical capacitance upon a displacement value of the slider 10 in relation to the base scale 1 having the main scale 20 of the measuring standard, the improved slide caliper is structured by the main scale 20 defined by plural electrodes 21 printed on a surface of the base plate 22 made of an insulator film at predetermined intervals with electrically conductive ink, and the base scale 1 is made by injection molding using a material of engineering plastics on which the main scale 20 is applied securely, so that the slide caliper can be manufactured in large numbers.

Electrical capacitance instrument and manufacturing method of the same

A tape measure device includes a belt tape member made of a flexible material. A cursor is slidably supported for movement on and along the belt tape member. The cursor includes a housing and an encoder which includes a relative displacement sensor for detecting a relative displacement value between the belt tape member and the cursor. The displacement sensor includes a first electrode made of a conductive ink and printed at predetermined and spaced intervals on and along the belt tape member. The conductive ink first electrode printed on the belt tape member is protectively coated by an electrically nonconductive insulative membrane. A second electrode is provided on the cursor and opposes the first electrode and the insulation membrane. A circuit is provided for creating an electrical capacitance value between the first and second electrodes and for issuing signals in response to a change of electrical capacitance between the first and second electrodes. A display responsive to the signals is provided for indicating the detected relative displacement value between the belt tape member and the cursor thereon.

Tape measure device

Growing community of inventors

Utsunomiya, Japan

Hiroshi Koizumi