Abstract: An extension arm (11) can be fixed to a column (2) at any height and with different inclinations. A foot holder (15, 16) is displaceably mounted on the extension arm and can be moved against the force of a traction cable (8) over the extension arm (11). A loading unit (4) programmable by means of an operating device (21) for selecting the load characteristics acts upon the traction cable. Alternatively, another extension arm for arm training can be mounted. Thus, different training varieties can be selected without the need of adjusting any weights or mechanisms. Different extension arms (11) may be provided which allow the adaptation of the apparatus to different training modes, such as leg, arm or body training.

Abstract: A foot control of the sewing machine can be actuated from a neutral position in two directions. In one case, a variable resistance becomes effective which produces regulating voltages within a determined range. A logic circuit with comparators produces for this voltage range a condition in which the driving motor of the sewing machine is controlled to operate with a number of turns corresponding to the voltage range. When the machine is stopped the needle is automatically positioned in its upper stop position. By repetitive actuation backward of the foot pedal the needle may be positioned in its bottom stop position and again in its upper stop position and so on. The logic treatment of the control signals from the foot control permits to transmit these signals for all required instructions through a two wire cable which is already required for the speed control.

Abstract: In the method the auxiliary nozzles are used individually or in groups to form a pressure wave travelling together with the front end of the weft thread through the weaving shed. Individual auxiliary nozzles or groups of auxiliary nozzles are maintained in a cut-off position for a certain amount of time after the front end of the weft thread has passed, however, are again cut-in, particularly prior to the moment of time at which the weft insertion operation ends, so that a trailing travelling wave is formed. Using such method the air consumption can be maintained at low levels. Particularly when individual auxiliary nozzles are cut-in only for short intervals of time in the trailing travelling wave, a particularly low air consumption can be achieved. By employing a trailing travelling wave, a lower air pressure also can be used for generating the pressure wave travelling with the front end of the weft thread.