Abstract: A control head for remote actuators on a vehicle heater/air conditioner system comprises variable resistors operated by control knobs to provide variable motor control voltages to the actuators which comprise servo-actuators or a pulse width modulated blower motor. The control head has a molded plastic housing with embedded conductive runners terminating in wipers. A control disk rotatable with each knob has an arcuate resistive film and a pair of arcuate conductors connected to ends of the film. The wipers engage the arcuate elements to apply a supply voltage to the conductors and pick off a control voltage from the resistive film. Alternatively the arcuate elements are on the housing and the wiper is on the control disk.

Abstract: In automatic assembly apparatus operating under electronic vision control, features on components to be assembled must be recognized and located in position and orientation so that a gripper mechanism may be directed to one component to pick it up and move it into correct position and orientation relative to the other component for assembly. The invention provides a known parallel projection optical system 8, 9, at the location of each component which provides a plan view for an electronic camera 11 of the components 20, 22 at constant scale regardless of lateral or axial component movements. The grey-level picture of each component provided by the camera is thresholded into a binarized picture at a threshold level which selects a primary component feature 27 within a part of the camera field of view which is certain to contain this feature.

Abstract: An improved block and tackle type sash balance that can be installed in single and double-hung windows by a single workman without the necessity of removing the window sashes from the window frame and reassembling the window unit.

Abstract: Free-flowing polyolefin molding compositions having a very high filler content are obtained, if instead of the individual fillers there is used a mixture of wood flour and chalk or talc.

Abstract: An extender for a combined double hung, double sash guide and weather strip unit is disclosed. The extender is slidably received in the open upper end of the parting bead of the weather strip unit and carries at its upper end prongs. When the extender is driven upwardly, as by raising the window sashes, the extender closes the air gap between the upper edge of the weather strip unit and the head jamb and at the same time the prongs are driven into the head jamb so that the extender also serves to attach the weather strip unit into the window frame thus eliminating the need for top staples or nails.