Abstract: A method for identifying video signal source is provided. The method includes the following steps. A first identification code is assigned to a first transmitter device by a receiver control unit of a receiver device. A first video data is transmitted by the first transmitter device. The first video data and a first identification image corresponding to the first identification code are combined as a first combined video data by the receiver control unit. The first combined video data is outputted to a display device by the receiver control unit.

Abstract: A gear puller includes a barrel having an orifice formed in one end, a pair of jaws received in the barrel and each having one end extended outward through the orifice of the barrel and each having a peripheral flange for engaging into a bearing to be pulled. An actuator rod may be engaged into the jaws for moving the jaws away from each other to solidly engage with the bearing to be pulled. A shank is secured to the barrel and has a block. A hammer is slidably engaged on the shank and movable to strike onto the block for forcing the jaws to remove the bearing from the object.

Abstract: A bearing removing device includes an elongated tubular member having an end receivable within an inner hole of a bearing is removed. A plurality of holes having a tapering configuration is spaced along a circumference of the end of the tubular member. The tubular member has a central through hole to receive therein a shaft member in such a manner to be movable between a first position and a second position. The end of the shaft member has one or more raised portions to be in contact engagement with the spherical members for driving the latter partially out of the holes. A support member is placed around the bearing to be removed. A nut member threadingly engaging a threaded section of the tubular member to abut against the support member is tightened against the support member such that the tubular member is moved relative to the support member.

Abstract: A socket wrench ratchet handle structure includes an elongated handle body having at least a ratchet head mounted to a first end thereof. The ratchet head has a through hole formed thereon to receive therein a driving member which a first driving plug and a second driving plug extending therefrom to respectively project out of two opposite faces of the ratchet head along opposite directions. The first and second driving plugs are of different specifications for engaging sockets of different specifications so as to allow a single ratchet handle to be used with sockets of two different specifications without the use of an adaptor. The ratchet head is also provided with a direction setting tab on each of the two opposite faces for the convenience of setting the driving direction for both the first and second driving plugs. Further, an orientation adjusting device may be provided between the ratchet head and the handle body to set the socket fit on the driving plugs toward any desired direction.