This fan clutch has an external stationary electromagnet energized in response to cooling signal to axially move an armature operatively connected to a valve member that controls the circulation of fluid into a rotatable viscous clutch. With the fluid circulating, the fan blading is hydraulically driven to draw cooling air through the vehicle radiator. When fan operation is no longer required, the electromagnet is automatically deenergized so that an internal spring moves the valve member to a c...

A magnetic clutch has a driving-side rotating member for holding one of a magnetic substance member and a hysteresis member and rotating in asynchronization with a rotary shaft; a driven-side rotating member for holding the other of the magnetic substance member and the hysteresis member and rotating in synchronization with the shaft, the driven-side and driving-side rotating members being spaced apart on the shaft; and a device for regulating the rotation of the shaft with sliding friction caus...

A work table extension system for a machine tool which is arranged with an existing work table of a machine in order to enlarge its workpiece capacity, i.e. to enable the machine to handle large diameter and/or heavier workpieces. The system includes a work table extension adapted to fit onto the existing work table of a machine, outrigger support members positioned to support the peripheral edge of the work table extension, and a hydraulic system for equalizing the load between the outrigger su...

A milling machine comprising a base, a milling head mounted on the base for movement relative thereto about a horizontal pivot axis, means for holding the milling head in a selected angular position about said axis and drive means for transmission of drive to a milling cutter held, in use, by holding means on the head, said holding means and pivot axis being so disposed relative to one another that said pivot axis intersects the axis of rotation of the milling cutter at the cutting location.

The contact surfaces between a seat and a base member are planar. This base member defines a shouldered bore for a retaining plate connected to the seat by locking and unlocking screws. This seat is integral with a pivot which is in two parts, whereof one is slidingly mounted in the said plate parallel to its rotation axis, while the other is off-centered relative to this axis in order to support at least one central bearing for the table. These improvements are applicable to machine tools havin...

A tool holder damped against vibrations having a wide range of frequencies comprises a tool support member provided with tool mounting means. The support member has a recess containing a segmental vibration damping member. The latter includes a plurality of nesting pieces. The meeting faces of the pieces are in frictional contact with each other. At least come of the pieces are spaced from the recess sidewall. Resilient means bear against the pieces, maintaining them wedged together in normally ...

An exercise apparatus for use in developing abdominal muscle. The exercise apparatus includes a supporting structure adjustably mounted on a platform and a lever structure mounted on the upper end of the supporting structure for pivoting about a horizontal axis. The lever structure has a first arm which is connected to a handle and a second arm which supports an impact member such as a medicine ball. The exercise apparatus is used by an individual by standing on the platform and pulling the hand...

An apparatus for playing and a method of playing the ball type game called "Buntball" is disclosed. The game is characterized as being suitable for play by persons of differing skill, gender, or age and of being safe to play indoors or outdoors. The apparatus comprises a rectangular playing field without walls or ceiling, a homeplate in front of the playing field, a bat, and a ball. The playing field includes four subareas, and is preferably sixteen feet wide and twenty-four feet deep. Homeplate...

A fluid friction clutch, especially for driving the cooling fan of an internal combustion engine. The rotating clutch housing has a separating wall defining a fluid reservoir chamber and a drive chamber and the separating wall has a passage which is opened and closed by a valve. The valve is actuated by an electromagnet disposed substantially coaxially with the clutch. A permanent magnet is attached to the valve assembly coaxially with the electromagnet and of opposite polarity to the magnetic f...

The table of a vertical boring mill has a trough surrounding it; and a plurality of paddles are mounted on paddle carriers to be driven around said trough to sweep chips before them. The paddle carriers are secured to an endless circularly arranged chain driven by a sprocket; and the bottom of the trough has a slot or slots therein through which the paddles sweep the chips out of the trough.