An apparatus and method for performing conic sectional operations on a workpiece is disclosed. The apparatus includes a conic surface generator which traces the surface of a cone and a cutting plane generator which traces a plane so that the plane intersects the surface of the cone. The conic surface and the cutting plane generator are connected by a conic section follower which traces the intersection of the cone and the plane. The apparatus also includes a working interface for working on a wo...

A precision tool is disclosed herein for locating the center of a workpiece having a shaft detachable coupled to the spindle or chuck of a drill press. Downwardly depending from the shaft is a housing enclosing either an electro-mechanical pendulum or an optical device having a bubble target. A holder is provided for the workpiece so that the workpiece may be positioned until the target lies along the central longitudinal axis of the pendulum or the optical axis whereby the workpiece is centered...

A message center comprises a housing having a plurality of compartments each of which would correspond to a particular individual. The front wall of the housing includes a plurality of openings one for each compartment to provide access to the compartment. Each compartment is provided with a pivotally mounted plate which may be selectively moved to and from a generally horizontal position and a generally vertical position. When the plate is in the generally horizontal position it functions as th...

A machining center for the machining of workpieces (26). It comprises at least one work unit (22) with a rotary tool (24) for machining a workpiece (26) arranged in a machining zone (28). The workpiece (26) is secured to a workpiece carrier (15), which for this purpose possesses a holding device (25). The workpiece carrier (15) may be moved into a workpiece change station (25), wherein workpiece change may take place. During workpiece change the workpieces (26) are picked up and put down from ab...

An apparatus comprising a center error creation circuit, a center error offset injection circuit and a center error controller. The center error creation circuit may be configured to generate a center error signal in response to one or more photo-diode signals. The center error offset injection circuit may be configured to (i) offset the center error signal and (ii) generate an offset signal. The lens controller may be configured to adjust a lens in a sled housing at a mechanical center is respo...

The PLAYTOWN CENTER is a design consisting of three upright panels which create three spaces for play. Each space provides a shelf to put things on or to work on, a window to look through or to use as a slot, and ample wall space. The structure includes accessories to help bring to life an ideal playing atmosphere for one or many more children.

A learning center for pre-school children comprising a worktable having attached perpendicularly to one face a supporting rod having arranged thereon a plurality of turntables and a plurality of display boards. The turntables, aligned parallel to the worktable, are free to revolve independently of one another in a clockwise or counter-clockwise direction about the supporting rod. The display boards can be constructed to revolve in conjunction with the turntables or to remain stationary. Attached...

A machining center has a tool change device provided above a horizontally mobile column that has a main spindle for holding a tool. A circular tool magazine for carrying a plurality of tools in a horizontal attitude is provided on a support base which is positioned above the region in which the mobile column moves. The support base is supported in a cantilever fashion by posts erected on a bed. The tool magazine rotates within a horizontal plane for indexing tools to a standby position. The tool...

A machining center comprises a plurality of machine tools arranged along a track, each of which has a working space, accessible through an operator door, for machining workpieces present in a receptacle. In addition, a loading system is provided for transporting the workpieces between the individual machine tools and for exchanging the workpieces on the machine tools through a loading opening that can be closed off by the respective operator door. At least some of the machine tools perform diffe...

A convenient easy-to-maneuver assembly provides a user-friendly gardening center, work bench and cart. The assembly can be readily arranged to fit the needs of the user. The preferred assembly features a table with an ergonomic handle, a wheeled base, and strong composite posts comprising metal tubes encased within impact-resistant plastic sleeves. Preferably, the versatile assembly has interchangeable modules or inserts, such as bins, grates and cutting boards, which can be placed on the table ...