Abstract: An assembly for coupling an implement to an operating arm of a machine comprising a first component fixedly mountable on the implement, a second component connectable to the operating arm, one of the components having a slot in a side and bottom thereof, disposed substantially radially relative to a given axis, and the other of the components having a section receivable into the slot to position the components in coupling relation, the components having engageable surfaces permitting angular displacement and precluding axial displacement relative to the given axis when the components are disposed in coupling relation and retaining means disposable in abutting relation relative to the components when disposed in coupled relation for precluding angular displacement between the components relative to the axis.

Abstract: An attachment for a vehicle generally consisting of a support frame mountable on the vehicle, a swing frame pivotally mounted on the support frame about an axis disposed laterally of a longitudinal centerline of the vehicle when the support frame is mounted on the vehicle, the swing frame being angularly displaceable relative to the support frame, a moldboard universally mounted on the swing frame, the support frame and the moldboard operatively connected for angularly displacing the moldboard relative to the swing frame about a first axis and a second operative connection for angularly displacing the moldboard relative to the swing frame about a second axis.

Abstract: An attachment for a tractor generally consisting of a main support frame mountable on a tractor, a tool support member mounted on the main support frame for pivotal movement about a first axis, a tool mounted on the tool support member for pivotal movement about a second axis, means operatively interconnecting the main support frame and the tool support member for angularly displacing the tool support member relative to the main support frame about the first axis, and means operatively interconnecting the tool support member and the tool for angularly displacing the tool relative to the tool support member about the second axis.

Abstract: An implement snubbing device positionable between a boom and an implement including a compressible member positioned generally between, and having a longitudinal axis extending generally between, the boom and the implement. A boom connecting mechanism connects the compressible member to the boom, and an implement connecting mechanism connects the implement to the compressible member. The compressible member has a compressing mechanism which comprises the compressible member along the longitudinal axis and is actuated by the swinging movement of the implement about a lateral axis generally perpendicular to the longitudinal axis. A second compressing mechanism compresses the compressible device along the longitudinal axis and is actuated by the movement of the implement about a second lateral axis generally perpendicular to the first lateral axis.

Abstract: A spectrum analyzer for FFT analyzing and displaying the frequency spectrum of a digital signal over a given frequency band (background), as well as over a more limited frequency band (foreground). The spectrum of the signal over each frequency band is calculated and displayed so as to appear on a screen as a simultaneous display. The position of the limited frequency band as well as the width thereof, may be varied.

Abstract: A system for detachably coupling an attachment to a prime mover provided with a mounting means and an actuating means generally comprising a female device mountable on the attachment and a collapsible male assembly mountable on the mounting means of the prime mover, cooperatively engageable with the female device, the male assembly being operatively connectible to the actuating means and movable thereby between a collapsed, inoperative condition and an extended, operative condition operatively engageable with the female device in coupling relation therewith when the male assembly is positioned adjacent the female device in registry therewith, and means mounted on the male assembly for selectively locking the male assembly in the extended, operative condition.