Abstract: A stop for stopping articles moving along a conveyor includes a stop arm mounted for rotation about a cam shaft, which, when rotated, moves said stop arm from an extended position to a retracted position.

Abstract: A pallet rack has carts which can nest and un-nest while running on the same sets of rails.

Abstract: A vacuum cleaner includes two blowers connected in series, one upstream of the filter and the other downstream.

Abstract: A chimney cap to selectively cover the outlet from the flue of a chimney which includes an open frame of selected geometric configuration located at the top of the chimney flue around the outlet, a cap to substantially cover the opening defined by the frame, bias device to bias the cap to a position separated by the frame, where a seal is provided to seal the cap and the frame when the cap is located contiguous to the frame. A guide arrangement can be provided to guide the cap toward the frame to selectively locate the seal of the cap and seal surface of the frame. A draw device can be provided to pass through the chimney flue to allow the cap to be drawn to engagement with the frame and a latch can be provided to receive the draw device to hold the cap in engagement with the frame against the bias force.

Abstract: A rack includes a shelf in which the means for connecting the shelf members together and for locking the shelf members together are integral with the shelf members.

Abstract: A chain link has load-carrying wheels and at least one guide wheel, and the axis of rotation of the load-carrying wheels intersects the axis of rotation of the guide wheel at a single point.

Abstract: A control arrangement for an accumulating conveyor having a plurality of zones includes an electrically-powered sensor in each zone, and a logic circuit associated with each sensor, each logic circuit comprising a first input, a second input from the sensor of its zone, a first output which sends a signal to the activator for that zone, and a second output to send a signal to the input for the next zone.

Abstract: A conveyor designed for high speed operations includes a drive shaft, a first friction wheel having a beveled end and mounted on the drive shaft, a second friction wheel mounted on the conveyor frame and having a beveled end which mates with the beveled end of the first friction wheel, and a drive wheel mounted on the same shaft as the second friction wheel, wherein the drive wheel contacts at least one of the conveyor rollers.

Abstract: A lineshaft-driven accumulation conveyor includes a plurality of intermediate shafts which run parallel to the drive shaft and are independently driven from the drive shaft, each of the intermediate shafts driving a zone of conveyor rollers.

Abstract: An accumulating conveyor is driven by a single, long drive shaft and a plurality of clutch shafts driven off of the drive shaft.