Abstract: A card file device has a base board, a jacket, an envelopement, and a plurality of envelopes. The base board has a plurality of creases to define a flap plate, a first connection plate, a first main panel, a second connection plate, and a second main panel. A first fastener is disposed on the flap plate. A second fastener is disposed on the second main panel to match the first fastener. The flap plate has a circular aperture and a round aperture to receive a rope. A hook engages with the rope. A handle is disposed on the first connection plate. The jacket is disposed on the first main panel. The envelopes are disposed between the jacket and the envelopement. The second main panel covers the envelopement.

Abstract: A vehicle mat has a main plate and a treading plate disposed on the main plate. The main plate has a recessed chamber to receive the treading plate, a plurality of protrusions, a plurality of crossed channels, and a plurality of fastening posts. The treading plate has a plurality of crossed lattices, a plurality of holes defined by the crossed lattices, a plurality of dirt scrape blocks disposed on the crossed lattices, and a plurality of fastening blocks matching the fastening posts. Each fastening post is inserted in the corresponding hole of the treading plate. Each fastening block engages with an annular groove of the corresponding fastening post.

Abstract: A control device for activating an electric appliance includes a conductive thread connected to and hanged on an induction control switch. An end piece which is a conductive member is connected to the conductive thread. A wire with a plug extends from a first end of the induction control switch so as to be plugged in a plug on a wall, and an electrical appliance is connected to a second end of the induction control switch. The electric appliance is activated by petting the conductive thread or the end piece.

Abstract: A drill bit sharpener includes a motor assembly and a drill bit grinding assembly. The motor assembly has a motor with a drive shaft to drive the drill bit grinding assembly, which includes a driven assembly, a sharpener housing, a grinding wheel assembly and a bit guide assembly. The sharpener housing is attached to the motor assembly, and the grinding wheel assembly is rotatably mounted in the sharpener housing and is rotated by the driven assembly. The bit guide assembly is mounted in the sharpener housing above the grinding wheel assembly. An adjusting screw in the bit guide assembly is used to adjust the grinding wheel assembly relative to the bit guide assembly. Multiple bit guide holes correspond to the grinding wheel assembly are defined in the bit guide assembly and allow a drill bit to pass through to abut the grinding wheel.

Abstract: A note holder for holding a notepaper, card, etc. The note holder has a foldable capability and includes a body pivotally mounted in a base. The base has an inner space for receiving the body when the note holder is folded. A slot adapted to hold a piece of paper is defined in the body and several fins are formed in the slot on the body. The fins hold the paper that is inserted in the slot in position.

Abstract: A BBQ grill with ignition system comprises a furnace seating on a base through a post which is connected to the base by connecting devices. Each connecting device is formed with a thread portion at one end and a block at the other end. The top portion of the post has a subsidiary ignition device which comprises a sliding bed and a support. The support is inserted through the post and secured by bolts thereat.

Abstract: A fastener includes a main body having a number of spaced ridges formed on an outer periphery thereof. The ridges are arranged along a helix. At least one of the ridges has a retainer extending in a direction that is at an angle with an extending direction of the ridge. In another embodiment, a fastener includes a main body having a number of spaced ridges formed on an outer periphery thereof. Each ridge extends along a direction that is parallel to a longitudinal direction of the main body. At least one of the ridges has a retainer extending in a direction that is at an angle with an extending direction of the ridge.

Abstract: The present invention relates to a nonreturn warning device for an intravenous drip infusion which includes a top member and a bottom member both of which forms an accommodation which has an inlet pipe and an outlet pipe at the top and bottom thereof. The outlet pipe includes a flange around which a recess is provided. A conic valve with a middle hole is arranged onto the flange. A float with a cylindrical stopper is received in the accommodation formed after connection of the top member and the bottom member. The middle section of the float contains a magnetic element, and a warning device is fitted beside the top member. Besides, a magnetic reed switch is installed in the warning device. As the float sinks with the fluid surface in the accommodation, the magnetic element approaches the magnetic reed switch and the magnetic force of the float will activate a buzzer for giving out a warning sound which is transmitted through a headphone jack or a radio transmitter to the nurses' call station.

Abstract: A frequency tracking and locking system of a wireless microphone has a frequency selection unit selecting a predetermined frequency and outputting the predetermined frequency to the frequency data storage unit, a frequency data storage unit storing a predetermined frequency data and outputting the predetermined frequency data to the data encoding unit, the data encoding unit encoding the predetermined frequency data and outputting the predetermined frequency data to the infrared modulation transmitter, an infrared modulation transmitter transforming the predetermined frequency data to the infrared frequency data and transmitting the infrared frequency data to the data decoding unit, a data decoding unit decoding the infrared frequency data to a first radio frequency and outputting the first radio frequency to the frequency transformation unit, a frequency transformation unit transforming the first radio frequency to a second radio frequency and outputting the second radio frequency to the radio emission unit,

Abstract: A one-handed hypodermic syringe is a renovated structure that allows users to push and pull the syringe by one hand. The medical personnel may place their thumbs inside the ring disposed in the distal end of the plunger and may press the concave objects disposed in the distal end of the barrel by their index fingers and middle fingers. Thus, the syringe may be held steadily, and the pull-push action of the injection manipulated with one band. The convenience for the medical personnel's use of hypodermic syringe is thereby enhanced.