Abstract: A locking mechanism for the control cords of a window blind extends partially into the headrail of a window blind, and a cord separation member on the portion of the mechanism within the headrail has discrete openings through which the cords pass and are separated as they enter the mechanism. A guide pin is positioned transversely across the upper end of the mechanism with one end of the guide pin being disposed nearer the separation member and lower than the other end, so that the cords passing over the pin may be rotated to a selected side of this portion of the mechanism. A cord gripping means is mounted below the guide pin, and includes a fixed gripping member disposed centrally within the second portion of the mechanism, and a movable gripping member is mounted within this second portion of the mechanism for gripping the cords therebetween. The separation member, guide pin and movable gripping member are all positionable alternatively for either left hand or right hand operation of the locking mechanism.

Abstract: A breakaway tamper evident cover for a container such as a spray can is provided with a cap portion and a locking ring portion, the two portions being connected by a frangible tear line. The frangible tear line is ruptured by striking a sharp axial blow to the top of the cap, driving the cap downward into the closure of the container and away from the locking ring. The rim of the cap is provided with an outwardly extending flange which snaps under the interior portion of the container's closure bead to secure the cap to the container while the locking ring remains in place.

Abstract: The disclosed dampening system employs rolls which are frictionally driven by the plate roll of an offset printing press to distribute a dampening fluid over the surface of the plate roll. The system employs a rubber form roll which is in frictional engagement with the peripheral surface of the plate roll and is thus frictionally driven by the plate roll. A water feed roll having a ceramic surface is in frictional engagement with the form roll so that the feed roll will be frictionally driven by the form roll. Dampening fluid is sprayed onto the surface of the feed roll by spray nozzles, flickers or slingers, and the feed roll is axially reciprocated relative to the form roll while it is being frictionally driven by the form roll and while the dampening fluid is being applied to its surface so that the dampening fluid will be transferred to and distributed over the surface of the form roll by the feed roll and will in turn be transferred to and distributed over the surface of the plate roll by the form roll.

Abstract: The high voltage electrically insulative safety coupler for moling or earth augering equipment prevents high voltage electric shock to the equipment operator. The coupler is composed of first and second coupler elements, with the second coupler element including a shaft surrounded by an elastomeric retention member formed of a dielectric material such as polyurethane capable of withstanding high voltages of on the order of 50 kilovolts without breaking down. The retention member is compressed within a cavity in the first coupler element and frictionally engages the interior walls of the cavity. A hard dielectric guide bearing member fixed in position at the bottom of the cavity partially surrounds the second coupler element and prevents lateral movement of the shaft at the cavity bottom, and a second hard dielectric collar closely surrounds the shaft at the top of the cavity and fits at least partially within the cavity to prevent lateral movement of the shaft at the cavity top.