초록 ▼

A mechanism for switching from independent to synchronous, or vice versa an operational setting of a dust collector with a receptacle for supplying another power tool with which the dust collector is to be operated synchronously. This mechanism comprises a first switch connected in series both to a

A mechanism for switching from independent to synchronous, or vice versa an operational setting of a dust collector with a receptacle for supplying another power tool with which the dust collector is to be operated synchronously. This mechanism comprises a first switch connected in series both to a power switch of the dust collector and to an electric motor thereof, a second switch connected in series both to said power switch and to said electric motor, but arranged in parallel with the first switch, a lid which can be closed to close said receptacle or opened to expose said receptacle, a rod which engages the lid to close the first switch when the lid is closed, thus conditioning the dust collector for independent operation, and which disengages from the lid to open the first switch when the lid is opened, and a second-switch activating member for closing the second switch to operate the dust collector synchronously with another power tool when the other power tool is supplied through the receptacle. The second-switch activating member includes a current detector provided in a circuit connecting the power switch and the receptacle and located between the power switch and the receptacle and a relay connected to the current detector and having the above-mentioned second switch as a contact.

대표청구항 ▼

In a mechanism for switching from independent to synchronous or vice versa an operational setting of a dust collector having a receptacle for supplying another power tool with which the dust collector is to be operated synchronously, said mechanism including (a) a first switch connected in series bo

In a mechanism for switching from independent to synchronous or vice versa an operational setting of a dust collector having a receptacle for supplying another power tool with which the dust collector is to be operated synchronously, said mechanism including (a) a first switch connected in series both to a power switch of the dust collector and to an electric motor thereof for independent operation of the dust collector, (b) a second, switch connected in series both to said power switch and to said electric motor, but arranged in parallel with the first switch, and (c) means for closing the second switch to operate the dust collector synchronously with the other power tool when electric current is supplied to the other power tool through the receptable, an improvement comprising safety means which is provided in conjunction with said receptacle and which can be operated to close the first switch when the other power tool is not plugged into said receptacle and to open the first switch when the other power tool is plugged into said receptacle.