Abstract: A modularized metal-air battery includes a metal-plate module, a first air-plate module and a second air-plate module. The metal-plate module has a metal anode enclosed in a frame that is thicker than the metal anode. Each of the first and second air-plate modules has an air cathode enclosed in a frame that is thicker than the air cathode. The first air-plate module, the metal-plate module and the second air-plate module are combined to constitute the metal-air battery in such a manner that the frames thereof are securely attached together thereby defining at least two chambers which are selectively filled with liquid electrolyte.

Abstract: A miniature electron emitter is disclosed. The miniature electron emitter includes a substrate, a first pattern of electrical conductor formed upon the substrate and a second pattern of electrical conductor insulatedly arranged to the first pattern of electrical conductor. An electron emitting part is electrically ohmic connected to the first pattern of electrical conductor and the second pattern of electrical conductor. A dielectric layer may also be mounted on the electron emitting part. A vacuum electronic device comprising the miniature electron emitter is also disclosed.

Abstract: A power supply having a high energy capacity battery module and a high energy power battery module for providing power to a load is disclosed. The high energy capacity battery module is connected to a DC to DC converter via a first switch for selectively providing power to the load. The high energy power battery module is connected to the DC to DC converter via a second switch for selectively providing power to the load. A charger is provided for connection to the high energy capacity battery module and the high energy power battery module via a third switch and a forth switch respectively for selectively enabling the high energy capacity battery module to charge the high energy power battery module. A controller is provided for performing switching operations on the first, second, third and fourth switches based on the operation conditions of the power supply.

Abstract: A tool display assembly includes a card having a dove-tailed flange formed to a lower edge thereof, at least one connecting member having a dove-tailed groove defined in a top thereof sa as to receive the dove-tailed flange therein and a lower end having four walls extending downwardly therefrom so as to form a rectangular portion to be received in a socket. An aperture is defined through a top of the lower end of the connecting member. A hook member has a hook formed on a top thereof and a stop bar extending transversely from a lower end thereof such that the hook extends through the socket and the rectangular portion and is engaged with the aperture.

Abstract: An eyebrow tattooing tool for marking make-up designs on the eyebrow. The eyebrow tattooing tool is composed of multiple disposable parts that can be easily assembled and disassembled in case any parts are tainted with blood from the person being tattooed so as to prevent blood-transmitted diseases from transmitting from person to person. In the eyebrow tattooing tool, the pigment liquid can be prevented from flowing backward to the motor so as to protect the motor from being damaged thereby. The multiple disposable parts allow the eyebrow tattooing tool to be used in a sanitary way and also allow long-term economic use of the eyebrow tattooing tool by replacing only the parts that are tainted without having to dispose of the whole of the eyebrow tattooing tool.

Abstract: A display pack having a security device includes a hanging portion with a disk extending laterally therefrom which has at least two opposite walls extending therefrom, and a securing member. The hanging portion has a first hole defined therethrough and the disk has a second hole defined therethrough, each of the side walls has a protrusion extending therefrom so that the two side walls are securely inserted into a socket with the protrusion engaging with a recess defined in an inner periphery of the socket. The securing member has a flange extending radially from a lower end thereof and a hook member extending from an upper end thereof so that the securing member extends through the socket and the hook member is engaged with the second hole of the disk.