Abstract: A data channel for a digital tester includes a random access local memory containing a main vector sequence, a subroutine vector sequence, and a test vector list. An index register is loaded with the address of the first vector in the list of vectors that is to be inserted as a variable into a vector stream. A sequence instruction selects the index register as the source of a test vector address when a variable vector is to be inserted into the vector stream at a point in a subroutine. The sequence instruction also resets the index register to a state which determines the address of the next variable to be inserted into the test vector pattern.

Abstract: A method and system for loading test data into individual pin memories of an automatic digital test system, particularly of the in-circuit type. Test data in the form of test vectors are accessed from a test vector store simultaneously with the access of a digital test pin selection signal. The test pin selection signal accessed with the test data is then used to selectively load the test data into a pin memory identified by the pin selection signal, thereby permitting the loading of test data into any one of a group of individual pin memories. In the preferrred embodiment the test data, a test vector, is stored in a test vector store in association with a test pin selection signal. When the test vector is read from memory, the test pin selection signal is also read by the same address signal.

Abstract: A solids comminuter having a circular series of upright abrasive rolls with upper end drive defines a central chamber to receive solids to be comminuted. A centrally apertured stationary bottom plate supporting the rolls defines an orifice partially covered by a free-turning screening plate to define an annular passage adjustable in width to form a size restriction gap. Driven by the swirling mass of solids pressing down against it, the screening plate drives a particle impeller housed in a receiving chamber underlying the screening orifice to pump the descending comminuted particles outwardly through a discharge passage in the wall of the receiving chamber.

Abstract: In an apparatus and method for comminuting solid material a plurality of comminuting rollers are journalled for rotational motion in a generally circular arrangement to form a tubular enclosure. Solid pieces of material introduced into the enclosure are driven orbitally at a speed sufficient to be forced centrifugally outwardly against the comminuting rollers. Puncturing elements on the rotating rollers operate to comminute the pieces of material by a rolling, puncturing action. In a preferred embodiment, the rollers are powered and are rotated conjointly to engage and drive the solid material orbitally. Additionally, an impeller may be employed to drive the material within the enclosure, and in yet another embodiment, the entire enclosure, including the rollers, is rotated.

Abstract: A method of and apparatus for impregnating a fabric reinforcement structure with a liquid impregnant especially suited for impregnants which set rapidly under normal conditions. The reinforcement structure is continuously advanced through a column of liquid impregnant to which impregnant is continuously supplied so as to cause the impregnant to move in a direction opposite to that in which the reinforcement structure is advanced.

Abstract: A single operator shake mill having a frame adjoining a workman operating station is provided with a surface for supporting a pre-kerfed shake block. A stop member is inclined upwardly and rearwardly toward the operator station to apply a downward and rearward force on the block whereas a splitting bar at the operator station is pulled through a kerf in the block to split an uppermost shake from the block by the application of a downward and forward pulling force which holds the block tight against the stop member and supporting surface while splitting. A reversible motor rotates sprockets which pull chains connected to the forward end of the splitting bar for providing the pulling force on the splitting bar. The control for this motor is at the operator's station so that the operator is free to set the block in place, split the shakes, and trim and stack the shakes without leaving the operator station. A shake trimming apparatus is also shown.

Abstract: A large diameter rotary drum has an open top and a floor in which are mounted a plurality of freely rotating sprockets having sharpened teeth. Wood wastes, large blocks, trimmings from shake mill operations, broken shakes and the like are deposited into the drum and are carried over the sprockets. The rolling action of the teeth on the wastes grinds the wastes to much smaller pieces which fall through openings around the sprockets and are carried away by a conveyor.