Other

Gp Technology & Innovation Ltd.

Ping Hung Tang

Wei Zhang

Philip Y W Tsui

Gallen Ka Leung Tsui

Chun Bong Leung

Gallen Ka-Leung Tsui

A battery of a preselected type advantageously has a beveled edge formed between a front-end surface and a lateral surface of the battery. In a battery charger, a slot has a cap formed with an interior channel for receiving a front-end portion of the preselected-type battery. The cap has a stopping member for stopping the preselected-type battery so as to receive recharging. Advantageously, the stopping member may be shaped to complement the beveled edge for seamlessly receiving the beveled edge when the preselected-type battery is inserted into the slot. A mismatch between the stopping member and a line edge of an unaccepted-type battery causes the stopping member to block the unaccepted-type battery from reaching deeper into the channel than the preselected-type battery when the unaccepted-type battery is inserted, disconnecting a positive charging terminal from the unaccepted-type battery to avoid the charger from accidentally recharging the unaccepted-type battery.

Mechanical foolproof design of battery charger and rechargeable battery

A communication protocol is employed between a movable barrier operator and an associated wall button using the traditional signaling wires connecting them. Implementing the communication protocol using the existing signaling wires also allows backward compatibility with the traditional push wall buttons that have a physical contact switch. In one embodiment, the communication protocol allows bi-directional communication between the moveable barrier operator and the wall button. The bi-directional embodiment of the protocol allows further communications, such as handshaking, signal confirmation and more advanced control between the wall unit and the barrier operator.

System and method for a moveable barrier operator

Growing community of inventors

Hong Kong, China

Ping Hung Tang