Abstract: Electrolytic solution which contains sulfuric acid and is stored in an electrolytic solution storage 2 of a case 3 is caused to be retained in an electrolytic solution retainer 25. A reference electrode 18 and a counter electrode 19 are printed on the underside of the electrolytic solution retainer 25. The reference electrode 18, the counter electrode 19, and the electrolytic solution retainer 25 are thus formed into a single component, with the reference electrode 18 and the counter electrode 19 being formed simultaneously. Electrode pins 32,33,34 are brought into contact with the reference electrode 18, the counter electrode 19, and a detection electrode 17. The electrode pins 32,33,34 are made of tantalum. A contact portion 32b,33b,34b and a lead portion 32a,33a,34a of each electrode pin 32,33,34 are formed as a seamless, integral body.

Abstract: Electrolytic solution which contains sulfuric acid and is stored in an electrolytic solution storage 2 of a case 3 is caused to be retained in an electrolytic solution retainer 25. A reference electrode 18 and a counter electrode 19 are printed on the underside of the electrolytic solution retainer 25. The reference electrode 18, the counter electrode 19, and the electrolytic solution retainer 25 are thus formed into a single component, with the reference electrode 18 and the counter electrode 19 being formed simultaneously. Electrode pins 32,33,34 are brought into contact with the reference electrode 18, the counter electrode 19, and a detection electrode 17. The electrode pins 32,33,34 are made of tantalum. A contact portion 32b,33b,34b and a lead portion 32a,33a,34a of each electrode pin 32,33,34 are formed as a seamless, integral body.

Abstract: Cam follower includes a cantilevered stud, and a bearing unit mounted on a head portion of the stud and having rollers and an outer ring. The outer peripheral surface of the outer ring constitutes a cam-driven surface. The cam-driven surface includes a central load-bearing region substantially parallel to the axis of the cantilevered stud, and a couple of load-reducing bearing regions indented radially inward from the central load-bearing region and located on opposite sides of the central load-bearing region axially symmetrically to each other. Mechanical stress acting on the inner surface of the outer ring, outer surface of the roller and outer surface of the stud's head portion presents a maximum intensity level at their respective points corresponding to a point of the outer ring which is subjected to maximum mechanical contact stress from a cam.

Abstract: Cam follower includes a cantilevered stud, and a bearing unit mounted on a head portion of the stud and having rollers and an outer ring. The outer peripheral surface of the outer ring constitutes a cam-driven surface. The cam-driven surface includes a central load-bearing region substantially parallel to the axis of the cantilevered stud, and a couple of non-load-bearing regions indented radially inward from the central load-bearing region and located on opposite sides of the central load-bearing region axially symmetrically to each other. Mechanical stress acting on the inner surface of the outer ring, outer surface of the roller and outer surface of the stud's head portion presents a maximum intensity level at their respective points corresponding to a point of the outer ring which is subjected to maximum mechanical contact stress from a cam.

Abstract: A copy-proof sheet having a longitudinal axis, and being constituted by a background and at least one latent mark, at least one of the background and the latent mark being formed of multi-line images of about 65-line 10% which are reproducible on a copy obtained from the sheet, the other of the background and the latent mark being formed of fine mesh images of about 150-line 10% which are not reproducible on a copy obtained from the sheet; the background and latent mark being distinguishable on the obtained copy due to a difference in color tone; the multi-line images being made up of longitudinal line-containing and lateral line-containing square areas each having sides of about 3 mm long; each longitudinal line-containing square area being made up of lines oriented parallel to the longitudinal axis of the sheet, and each lateral line-containing square area being made up of lines oriented normal to the longitudinal axis; and the longitudinal line-containing and lateral line-containing squares being juxtapose