Abstract: A memory bank switching apparatus equipped with a bank switching register, wherein a specific address signal within a prescribed address scope for access to ROMs is outputted onto an address bus, and data relative to the address of a memory bank to be used subsequently is outputted onto a data bus, so that a location in the bank switching register is selected by the address signal. Then the data on the data bus is written in the bank switching register, thereby enabling only the memory bank selected according to the content of the bank switching register.

Abstract: Chains are passed with a sagging round first sprockets incapable of movement and second and third sprockets capable of movement corresponding to the movement of the opposite free ends of a bellcrank rotatable in a vertical plane. The chains are moved to cause reversal of a billet supported by them. Also, the billet can be clamped by the same apparatus.

Abstract: An apparatus comprising a grinding unit supported on and movable along a transversal beam provided in a wagon which is movable along a pair of spaced rails. The grinding unit includes a stationary frame on which a transversal beam is movably supported. A shaft member is rotatably mounted in a hollow member secured to said transversal beam and has fork-shaped frames fixed to the lower end thereof. A frame is pivotably supported between the lower ends of the fork-shaped frames and has a shaft bearing sleeve secured to a front portion of said frame. A grinder wheel shaft carries a grinding wheel and is rotatably received in the shaft bearing sleeve. There is provided means for swinging said fork-shaped frames about an axis of said shaft member. Cam means are mounted on the underside of a base member secured to the top of the hollow member to define a gap therebetween.

Abstract: An apparatus comprising a grinding unit supported on and movable along a transversal beam provided in a wagon which is movable along a pair of spaced rails. The grinding unit includes a stationary frame on which a transversal beam is movably supported. A shaft member is rotatably mounted in a hollow member secured to said transversal beam and has fork-shaped frames fixed to the lower end thereof. A frame is pivotably supported between the lower ends of the fork-shaped frames and has a shaft bearing sleeve secured to a front portion of said frame. A grinder wheel shaft carries a grinding wheel and is rotatably received in the shaft bearing sleeve. There is provided means for swinging said fork-shaped frames about an axis of said shaft member. Cam means are mounted on the underside of a base member secured to the top of the hollow member to define a gap therebetween.