Abstract: An industrial robot of the horizontal multi-articulation type includes a vertical shaft providing an articulation between a first arm and a second arm. The shaft is supported for rotation at a fixed vertical position on the first arm while the second arm is removably secured through clamping to an end portion of the vertical shaft second arm which projects downwardly from the first arm. The bottom end of the shaft is supported by a removable bearing plate. A pulley operatively connected to a motor is mounted for rotation on the shaft, and a speed reduction gear is interposed between the pulley and the shaft so that the shaft and hence the second arm are angularly rotated by the motor at a very low speed relative to the speed of the motor. In this arrangement, the second arm can be easily mounted and removed on and from the shaft and hence the first arm.

Abstract: A carriage for a hand-operated knitting machine is disclosed which is suitable for knitting with a thick or heavy yarn. A brush wheel is supported on a support plate for rotation substantially in a vertical or acutely inclined plane and extends at a lower end thereof between a sinker and a forward edge of a needle bed and below a lower face of a knitting needle in the needle bed so that it may push down loops suspended from the knitting needles.

Abstract: A coded electric signal generating keyboard for a single element typewriter is disclosed which has a keylever signal storing function and includes an interlock mechanism for permitting only one interposer at a time to be moved out of its normal position. Thus after depression of a particular key another key is prevented from being depressed until the interposer moved to an operative position is restored to the normal position during an initial part of a printing cycle initiated in response to depression of the particular key. It further includes an arresting mechanism operable to arrest another subsequently released interposer to an intermediate stored position during the remaining part of the printing cycle whereby another printing cycle may be initiated at the end of such printing cycle.