Abstract: A cooking and/or heat-maintaining unit comprises a main heating element and an auxiliary element adjacent thereto. A control therefor comprises a regulating or control device having a rotary setting member with a shaft for adjusting the power or temperature, as well as a switching member for switching an additional heating system on or off, the switching member having a switching shaft arranged coaxially with the shaft on the setting member. The switching member is operable by rotation of the setting member to a given angular setting, the setting member and switching member being independent until the angular setting is reached. The switching member preferably further comprises a quick-action switch with stable limiting positions, operable by the setting member, and which in one of the limiting positions operates a contact for switching the additional heating system on.

Abstract: A sewing machine includes a material engaging part such as a dog which is engageable with a material workpiece to selectively feed it in a forward and a reverse direction. In addition, the sewing machine includes the usual mechanism for raising and lowering the dog so as to complete an advancing or reverse movement of the material. The dog is driven preferably by a mechanism which includes an eccentric which may be adjusted so as to vary the length of horizontal feeding movement of the dog while the elevational changes of the dog remain constant by a separate feeding control mechanism. The magnitude of movement of the dog is controlled in accordance with a stitch length to be sewed by a stitch setting device which includes a movable contacting member which is connected to the eccentric mechanism and is movable between two end positions in order to adjust by a selected amount the movement of the eccentric in driving the dog by a selected amount.