Abstract: A safety electronic lighter includes an ignition control switch, which is operated to drive a high voltage coil, causing it to discharge a high voltage in producing sparks, the ignition control switch being rotatable between the operative position and the non-operative position, a safety lock, which is operated to lock the ignition control switch, prohibiting the ignition control switch from operation, a first power control switch, which is operated to switch on/off the power supply circuit of the electronic lighter, a second power control switch adapted to control the operation of the first power control switch and being rotated between the operative position and the non-operative position.

Abstract: A safety electronic lighter includes an ignition control switch, which is operated to drive a high voltage coil, causing it to discharge a high voltage in producing sparks, the ignition control switch being rotatable between the operative position and the non-operative position, a safety lock, which is operated to lock the ignition control switch, prohibiting the ignition control switch from operation, a first power control switch, which is operated to switch on/off the power supply circuit of the electronic lighter, a second power control switch adapted to control the operation of the first power control switch and being rotated between the operative position and the non-operative position.

Abstract: A safety electronic lighter includes an ignition control switch, which is operated to drive a high voltage coil, causing it to discharge sparks, the ignition control switch being rotatable between the operative position and the non-operative position, a safety lock, which is operated to lock the ignition control switch, prohibiting the ignition control switch from operation, a first power control switch, which is operated to switch on/off the power supply circuit of the electronic lighter, a second power control switch connected in series to the first power control switch, the second power control switch being mounted inside the housing of the electronic lighter and kept from sight and accessible by a rod member through a hole at the housing of the electronic lighter, and a latch control device controlled by a combination of numbers to control the connection of the battery to the ignition control switch and the power control switch.

Abstract: An oil level detector includes a circular holder base installed in an oil tank of a vehicle to hold an insulative sleeve in a bottom tube thereof, a float floating with the level of oil along the bottom tube, and a circuit board mounted in the insulative sleeve to detect the elevation of the float, wherein the tube which holds the insulative sleeve inside the holder base is an anticorrosive close-end tube; the insulative sleeve has both ends sealed with a respective sealing cap, the sealing cap which seals the top end of the sleeve being forced into tight engagement with the inner diameter of the tube when the sleeve is installed in the tube, causing the top end of the tube to be water-tightly sealed.

Abstract: An engine oil level detector, which includes a casing, a cover covered on the casing and defining two communicated air chambers, a diaphragm covered on the air chambers of the cover, the diaphragm having first and second tubular coupling portions, an electromagnetic valve mounted in the casing and controlled to reciprocate the first tubular coupling portion, a solenoid switch controlling a signal lamp, a magnet moved with the second tubular coupling portion to turn on/off the solenoid switch, and a suction tube connected between the first air chamber and the engine oil tank in a vehicle engine, wherein the magnet is moved with the second tubular coupling portion of the diaphragm toward the solenoid switch, causing the solenoid switch to be turned off when the oil level in the engine oil tank drops below the suction tube and the electromagnetic valve is turned on; the magnet is moved with the tubular coupling portion of the diaphragm away from the solenoid switch, causing the solenoid switch to be turned on wh

Abstract: An oil level detector mounting arrangement, which includes a mount having a downward tube dipped in the oil in the oil tank of a vehicle, a float floating in the oil in the oil tank and moved along the downward tube, and a circuit board sealed in the downward tube and carrying a plurality of solenoids at different elevations for acting with magnets at the float to indicate the elevation of the float in the oil tank, wherein the solenoids each have a first end inserted through a respective hole at the circuit board and then welded to a contact at the circuit board, and a second end inserted through a respective hole at the circuit board and then welded to a common springy wire conductor suspended from the circuit board.

Abstract: A safety electronic lighter includes an ignition control switch, which is operated to drive a high voltage coil, causing it to discharge sparks, the ignition control switch being rotatable between the operative position and the non-operative position, a safety lock, which is operated to lock the ignition control switch, prohibiting the ignition control switch from operation, a first power control switch, which is operated to switch on/off the power supply circuit of the electronic lighter, a second power control switch connected in series to the first power control switch, the second power control switch being mounted inside the housing of the electronic lighter and kept from sight and accessible by a rod member through a hole at the housing of the electronic lighter.

Abstract: An oil supply and return tube system connected to an oil tank of a motor vehicle is provided. The system includes a base having an internally threaded oil intake hole and an internally threaded oil return hole, an oil intake pipe connected to the oil intake hole, an oil return pipe connected to the oil return hole, an air passage hole, an air discharge valve, and two lock devices respectively fastened to the oil intake hole and the oil return hole to lock the oil intake pipe and the oil return pipe in the oil intake hole and the oil return hole, respectively. The base has an open chamber at a top side thereof, two vertical coupling flanges bilaterally disposed at a side entrance of the open chamber, a cover plate covered on a top side of the open chamber, and a socket assembly mounted in the open chamber at one side and adapted for receiving an electric plug member.

Abstract: Both ends of a sensing probe are sealed by an assembly including a fixing disk, a sensing probe, a sensing circuit, a floating collar and an external tube is provided. The fixing disk is provided with a threaded opening in which one end of the sensing probe is fixedly attached. The sensing probe is built-in with a sensing circuit. A floating collar is movably enveloped onto the sensing probe. The external tube is further attached to the fixing disk and the inner diameter of the external tube is larger than the outer diameter of the floating collar. The other end of the sensing probe is provided with an inner threaded portion. A locking cover is provided with a pair of openings and a post in a central portion. The post is provided with an external threaded portion in which the inner threaded portion of the sensing probe can be engaged. The post further includes a threaded recess in which a bolt having a small collar can be attached. The fixing disk further includes an annular extension at its bottom.

Abstract: An oil supply and return tube structure for oil tanks in cars and ships includes a base having a large oil return hole, a large oil intake hole, a small oil intake hole, a small oil return hole, an air inlet and a float hole to allow dimensional and wavy filtering of oil in the oil tank. By means of a float in conjunction with a sensor in a float shaft, the oil level may be detected. An air discharge valve is provided for adjustment of air pressure in the oil tank. A sinuous tube is provided to protect the sensor in the float shaft.

Abstract: A waste level detector including a holder fixedly secured to a vehicle's cesspool by screws, an elongated probe extended downwards from the holder and disposed inside the cesspool, a float movable along the probe, a magnet fixedly secured to the float, a detecting circuit mounted inside the elongated probe to detect the elevation of the magnet, a perforated cylindrical casing having a top end threaded onto the outer thread on the holder and covered around the probe and a bottom end covered with a perforated end cap, and a cover covered on the holder above the cesspool.

Abstract: A cesspit water level indicator is provided. The water level indicator includes an expansible element which carries a sliding rod to move up and down relative to a fixed rod responsive to the change of water level in a cesspit. The sliding rod includes an electrical contact in the form of a pin. The pin slidably engages a resistive plate mounted to the fixed rod. The change in electrical resistance is indicative of the change of water level in the cesspit.

Abstract: A foldable safety lighter is provided having a locating block for securing a nozzle tube to a casing at either a first position, permitting the nozzle tube to be longitudinally extended outward from the casing, or a second position, permitting the nozzle tube to be rotated through 180.degree. angle relative to said first position, so as to lie parallel to the casing for reducing storage space. A control knob is rotatable to a triggering position, to trigger a gas tube to discharge gas and simultaneously trigger an electric igniter to discharge sparks to ignite discharged gas from the gas tube. The control knob can be rotated to a locking position to prevent accidental triggering thereof.