Abstract: A programmable-sequencing valve assembly for controlling plural fluid-operated motors, which includes a series of valve housing modules, sealably joined to one another thereby forming an elongate valve housing which receives plural valve inserts. The valve housing modules collectively form manifolds which may be connected to a pressurized source of fluid and an exhaust line. The assembly is mechanically programmable and provides a visible, non-volatile program to control multiple motors. Individual valves are actuated by cam-operated rocker arms. A cam shaft includes removable adjustable cams, a program may be quickly changed by replacing or rearranging the shaft, its associated cams, or nodules on the cams.

Abstract: Saw-advancing apparatus in a grinder for circular saws which includes a pad brought into engagement with the edge of the saw by extension of a fluid-operated ram. The pad and ram are swung as a unit to produce rotation of a saw engaged by the pad.

Abstract: Grinding apparatus which includes a clamp for holding an article to be ground. The clamp is swung, in orbital fashion, to move the clamp from a position located under a lower edge portion of a grinding wheel located on one side of the wheel's rotation axis, to a position located under a lower edge portion of the grinding wheel located on the opposite side of the wheel's rotation axis. In the sharpening of saw chain, the clamp is used in holding chain during the sharpening of cutter links of one hand when occupying one position, and is used in holding chain during the sharpening of cutter links of opposite hand when occupying its outer position.

Abstract: Apparatus for storing, retrieving and replacing information contained within discrete magnetic tape information bearing cartridges comprising a storage area for storing a plurality of said cartridges each having a predetermined and designated location in the storage area; at least one processing station for extracting information from individual cartridges; computer memory means for storing a play schedule for sequential movement of said cartridges through said processing station; mechanical selection means operatively connected to said computer memory means operable in response to signals received therefrom to retrieve an individual cartridge and transferring it to the processing station and for returning same to its designated location in the storage area; servo motor means driving said mechanical selection means, said servo motor means being driven by power transmitted to it as a result of said computer signals; current feed back loop interconnecting said servo motor output and said computer output whereby

Abstract: A grinder for sharpening saw chain cutting teeth includes a base, an arcuate guide arranged on the base, a power-driven rotary grinding wheel mounted on a pivotal motor arm movable with a mounting bracket along the arcuate guide and a releasable, self-centering clamp for holding a segment of a saw chain in position beneath the grinding wheel. The clamp includes laterally opposed elongate bars which support a saw chain and which are each simultaneously displaceable at equal rates toward a preselected datum line. The preselected datum line intersects a fixed, reference axis about which the mounting bracket is angularly displaced. Because the elongate bars are movable equally with respect to the preselected datum line, the lengthwise centerline of a saw chain will always be maintained substantially aligned on the preselected datum line regardless of the width of the chain. The arcuate guide is an elongate bar having an arcuate guide track which receives the motor arm mounting bracket.