Abstract: The present invention provides a method and an apparatus for playing multi-function device are offered to enable an data processor to amplify the broadcasting power and perform stereophony by the means of a speaker set. This apparatus for playing multi-function device includes an data processor, a monitor, a modulation circuit, an amplification circuit, a speaker set, an audio output plug, a first universal serial bus socket, a second universal serial bus socket, a control panel, and a housing. The connecting method of this invention is to insert an data processor into a rectangle tank, conjoin a universal serial bus connector and a universal serial bus socket, and then, connect an audio output plug to an audio output socket. A back-to-forth of the forgoing connecting method can remove the data processor.

Abstract: A machine for the mechanical working of band saws is provided whose frame carries an appliance for gripping the saw on the sides, a mechanism for the pitch feed of the saw, tooth-setting tools secured on the ends of the arms which are kinematically linked with the machine drive, and a pair of knives for cutting off the saw blade. The knives are located after the tooth-setting tools in the direction of pitch feed. One of these knives is secured on the saw-gripping appliance, while the other one is kinematically linked with one of the arms carrying the tooth-setting tool for joint movement with the latter. The machine provides for manufacturing saws with any required number of teeth.