Abstract: In an imaging apparatus system, a first imaging apparatus includes a first front casing, a common rear casing, a first lens mount attached to the first front casing, and a common monitor attached to the common rear casing. A second imaging apparatus includes a second front casing, a common rear casing, a second lens mount attached to the second front casing and different from the first lens mount, and a common monitor. When the first and second front casings are respectively attached to the common rear casings and, the center of the first lens mount and the center of the second lens mount are identical, regarding the relative positions in the left-right direction with respect to the common rear casings and.

Abstract: An imaging apparatus system includes a first imaging apparatus, and a second imaging apparatus. The first imaging apparatus includes a first top casing including a casing top surface, and a common rear casing including a casing rear surface. The second imaging apparatus includes a second top casing including a casing top surface, and the common rear casing. The first top casing has a shape in which a vent hole is formed in the second top casing.

Abstract: The packaging box includes an inner box body 20 and an outer box body 10 each made of paper. In the inner box body 20, a protection box portion 21 for protecting the screw portions 3d and the outer side electrodes 3e of the spark plugs 3 is formed by being bent. Screw portion insertion holes 30 capable of passing the screw portions 3d of the spark plugs 3 therethrough and bent tabs 32 being bent at the inside of the protection box portion 21 are provided on the upper surface of the protection box portion 21. The lower surfaces of the large diameter portions 3c of the metallic shells of the spark plugs are supported by the upper surface of the protection box portion 21 including the bent edges 31b of the bent tabs 32.

Abstract: The packaging box includes an inner box body 20 and an outer box body 10 each made of paper. In the inner box body 20, a protection box portion 21 for protecting the screw portions 3d and the outer side electrodes 3e of the spark plugs 3 is formed by being bent. Screw portion insertion holes 30 capable of passing the screw portions 3d of the spark plugs 3 therethrough and bent tabs 32 being bent at the inside of the protection box portion 21 are provided on the upper surface of the protection box portion 21. The lower surfaces of the large diameter portions 3c of the metallic shells of the spark plugs are supported by the upper surface of the protection box portion 21 including the bent edges 31b of the bent tabs 32.

Abstract: In a package box for a plurality of spark plugs, a paper tray has an array of lower cellular boxes provided to accommodate lower portions of spark plugs to protect their spark gaps against dimensional alteration, and an array of upper cellular boxes provided to retain upper portions of the spark plugs in place. A casing package is provided to accommodate the paper tray. The lower cellular boxes have circular crease lines each about the size so that Individual thread portions of the spark plugs are to be inserted, and having a plurality of incision lines provided to be oriented radially toward central portions of the circular crease lines.

Abstract: In a spark plug, a tubular insulator has an axial bore in which a center electrode and a terminal electrode are axially aligned, the terminal electrode having a seal portion fixedly supported by partly filling the axial bore with a glass sealant. The insulator further has a tapered shoulder portion between a diameter-reduced portion and a diameter-increased portion, each provided on the insulator. A metallic shell is placed around the diameter-increased portion of the insulator, a rear end of the metallic shell being caulked against the diameter-reduced portion of the insulator, a space between the metallic shell and the diameter-reduced portion of the insulator being filled with a ceramic powder. An inclination of the tapered shoulder portion of the insulator ranges from 10 to 45 degrees against a plane perpendicular to the terminal electrode. A roulette is formed on an outer surface of the seal portion of the terminal electrode in which the glass sealant is filled.

Abstract: A spark plug with pressure sensor comprising; a center electrode; an insulator placed to enclose the center electrode to support the electrode; a metallic shell having a diameter-increased portion, a diameter-reduced portion and a male thread portion in turn, the male thread portion being diametrically smaller than the diameter-reduced portion; an annular-shaped pressure sensor inserted into an outer surface of the diameter-reduced portion; an annular flange inserted into the outer surface of the diameter-reduced portion to sandwich the pressure sensor with an overhang portion of the diameter-increased portion; a gasket ring being placed underside of the flange when the metallic shell is screwed through the thread portion to a cylinder block of an engine; the annular flange extending its inner rim to position at a central side of the pressure sensor, and welded to the metallic shell.

Abstract: A spark plug with pressure sensor comprising; a center electrode having a high voltage terminal; an insulator provided around said center electrode to securely support it; a tubular metallic shell provided to support said insulator at its inner side; a pressure sensor having a piezoelectrical element at least enclosed by a casing of a metallic hollow ring; the metallic shell having a diameter-increased portion and a diameter-reduced portion; the casing of the sensor being inserted into the diameter-reduced portion with an inner side of the casing tightly engaging the outer side of the diameter-reduced portion; a mount means having a ring portion and a flange portion; the ring portion tightly inserted into the diameter-reduced portion while the flange portion tightly sandwiching the casing with a step between the diameter-reduced portion and the diameter-increased portion; and the ring portion being welded to said diameter-reduced portion to maintain air-tight relationship between an innerside of the ring port