Abstract: An article accumulation conveyor in which the drive for moving the articles is automatically discontinued for a selected section of the conveyor when an article is stopped on another section of the conveyor and is started again automatically when the article moves. The power for activating the starting and stopping instrumentalities is furnished in its entirety by the conveyor drive so that all need for extraneous power sources or forces exerted by a moving article is entirely eliminated. The activating power is transmitted by a "screw-jack" type of device so that enormous force can be furnished to the article carrying rollers which makes it possible to carry both small and large, light or heavy articles on the same conveyor at the same time.

Abstract: This invention comprises a conveyor chain linkage which is especially well adapted for tubular type bulk handling conveyors wherein it is very important that the linkage be very strong but take up as little space as possible in order not to diminish the volumetric capacity of the conveyor and also be very accurate in pitch dimensions so as to operate properly on the sprocket which drives the chain. Structurally the preferred form of the invention comprises a rod, each end of which has a slightly increased diameter area which is threaded and a ball having a central opening threaded to fit onto a threaded area and a ball so threaded on each end of the rod.

Abstract: An a.c. regulator is disclosed including series and shunt choppers connected between a source of alternating current and an output, each chopper including a pair of unidirectional controlled rectifying paths connected in parallel opposition. The invention is characterized by the provision of a control circuit including a load current sensor for sensing the direction of flow of load current, the control being connected to render conductive a selected one of the transistors in the shunt chopper alternately with a selected one of the transistors in the series chopper, the alternation occurring at a frequency that is high relative to the supply voltage frequency.

Abstract: This invention comprises a machine such as a conveyor having a chain and a powered sprocket for driving the chain. The sprocket comprises a circular main plate, individual chain-contacting teeth around the periphery thereof and each tooth being pivotally connected to the main plate for rotation relative thereto and each tooth having a cam contacting surface. An individual cam-stop is also pivotally mounted on the main plate for rotation relative thereto and adjacent to each tooth and each cam-stop has two cam areas capable of selectively contacting the cam contacting surface on its adjacent tooth, and means for positioning each of said cam-stops so that a cam area thereon will rotate its adjacent tooth towards contact with the chain as the chain enters the sprocket, and so that the other cam area will enable said tooth to rotate so as to release contact with said tooth with said chain at the desired release point between the chain and sprocket.

Abstract: The present invention relates to an article accumulation conveyor in which the drive for moving the articles is automatically discontinued for a selected section of the conveyor when an article is stopped for any reason on another certain section of the conveyor and is started again automatically when the article moves for any reason. The power for activating and deactivating the drive for moving the articles is furnished substantially in its entirety by the conveyor drive so that all need for extraneous power sporces or the force exerted by a moving article is entirely eliminated.

Abstract: The present invention relates to an article accumulation conveyor in which the drive for moving the articles is automatically discontinued for a selected section of the conveyor when an article is stopped on another certain section of the conveyor and is started again automatically when the article moves, and the power for activating the stopping and starting instrumentalities is furnished in its entirety by the conveyor drive so that all need for extraneous power sources or force exerted by a moving article is entirely eliminated.

Abstract: A power supply apparatus is disclosed including a device for producing an oscillatory signal, and an output circuit for producing from said oscillatory signal an alternating-current output voltage, characterized by the provision of a regulating unit connected in series with the output circuit for producing a controllable voltage drop. The regulating unit includes a control device operable in response to a signal derived from the output circuit for controlling the voltage drop in response to a change in an output parameter of the output circuit.

Abstract: An article accumulation conveyor in which the drive for moving the articles is automatically discontinued for a selected section of the conveyor when an article is stopped on another certain section of the conveyor and is started again automatically when the article moves. The power for activating the stopping and starting instrumentalities is furnished in its entirety by the conveyor drive so that all need for extraneous power sources or force exerted by a moving article is entirely eliminated.