Abstract: An illuminative clipper structure contains a body including a first and a second support arms axially connected together, the first support arm including a recessed area arranged on an outer wall thereof, a first and a second recesses communicating with the recessed area; a first sleeve fitted on the first support arm and including a chamber formed on an inner wall thereof, and an aperture to communicate with the chamber; an illuminating assembly including a holder placed in the chamber to receive cells and supply power toward a bulb to emit lights, a wire coupled with the holder and the bulb, the wire being inserted into the aperture from the first recess so that the bulb is located at a second recess of the body; a protective cover covered onto the recessed area to fix the bulb so that the bulb emits lights to a movable opening of a clipper.

Abstract: A dual-electrode spark igniter (spark plug), which has two electrodes extending from the plug body. During a spark event, electricity flows across a first spark gap from a first electrode to a second electrode. Electricity also flows across a second spark gap from the second electrode to ground.

Abstract: A spark plug including a cylindrical insulator having an axial hole extending in an axial direction; a center electrode held in the axial hole on a leading end side; a connecting terminal held in the axial hole on a trailing end side; and a sealing layer provided in the axial hole and including a glass sealing material containing a glass component and a metallic component, the sealing layer including a first sealing layer containing a first glass sealing material and a second sealing layer containing a second glass sealing material laminated in an axial direction of the axial hole, the first sealing layer contacting the center electrode, and the second sealing layer contacting the connecting terminal, wherein the second glass sealing material has a fluidity higher than that of the first glass sealing material at a temperature higher than a softening point of a glass component in the sealing layer.

Abstract: A spark plug fabricating method and a spark plug fabricated by the same are provided. The spark plug is equipped with a piezoelectric sensor working to measure the pressure of combustion of fuel in an engine and required to apply a given preload to the piezoelectric sensor at all the time. The piezoelectric sensor is disposed within a holder and retained between the holder and a porcelain insulator. The fabrication method includes the steps of pressing the holder to apply a required preload to the piezoelectric sensor in a longitudinal direction of the porcelain insulator and joining the holder to a metal shell while maintaining the preload applied to the piezoelectric sensor as it is.

Abstract: An optical pressure sensor assembly integrated with a spark plug (16) and spark plug boot (12). The pressure sensor comprises an optical fiber (34) with a pressure diaphragm (36) at the tip to sense pressure and pressure changes within the combustion chamber (32) of a spark ignition engine. A channel (30) is provided in the spark plug to hold the sensor. The diaphragm (36) of the sensor is located closer to the spark electrode than to the electric conductor which is encased by the boot (12). The optical fiber (34) is contained within a shaft that is routed through the boot (12) and into the channel (30). The optical fiber (34) is operatively and electrically connected to the vehicle's engine controller. The opto-electric connection to the vehicle's engine controller is made adjacent a coil (72) in the boot (12) or removed from the coil (72). The fiber (34) is surrounded by a nonmetallic shaft (22) outside the engine. Inside the spark plug (16), the shaft is metallic.

Abstract: A threaded portion is formed on a metal shell of a spark plug. Within a mounting base of the metal shell, a pressure sensor is arranged in such a direction that it generates an electrical signal in response to a variation in a tightening load of the spark plug. A slit is formed as a pressure-introducing channel along an axis of the spark plug in the threaded portion of the metal shell so that the slit is communicated with an interior of the mounting base.

Abstract: A lithotripter is provided with an upwardly opening reflector filled with water. A valve is secured to the undersurface of the member providing the reflector. A bore extends axially through the valve body in alignment with a bore in the reflector member to accommodate an electrode assembly. A disc is mounted in the body and also has a bore aligned with the first two mentioned bores to accommodate the electrode assembly. The electrode assembly can be partially withdrawn to clear the bore in the reflector member and also the bore in the disc, but blocking the passage of water through the valve body bore. The disc is then rotated to move the valve disc out of alignment with the reflector member body to prevent further loss of water from the reflector.