Abstract: A table unit, in which table tops with pedestals can be joined to, and detached from, each other easily and without the need of tools, comprises at least one table top, which has at least one locking slot provided thereon; and at least one pedestal supporting the at least one table top, the pedestal having at least one locking bolt, which is movable into engagement with the at least one locking slot for connection of both, and an arresting device to be operated without tools for arresting the at least one locking bolt in the at least one locking slot.

Abstract: A motor, a clutch and a brake part are provided to drive a sewing machine. Two potentiometers are connected in series with individual ones of two respective switches and in parallel across two leads of a control cable which is connected to a control box. The control box supplies power to the motor under the control of a pedal. One of the switches is a contact switch controlled by a knee switch one of whose surfaces, swivelable about an axis, rests against the actuating member of the contact switch. The other switch is a position switch, such as a toggle switch, and is carried by another surface of the knee switch.