A method and a device are provided for achieving a step-by-step feeding, based on a rotary shaft which optionally can be made to execute one or more well-defined, whole rotation turns. The step-by-step feeding is achieved by mechanical connection between a driver joined to an output shaft and the inner periphery of a drive drum directly driven by a drive motor and arranged concentrically relative to both the driving and the driven shaft. The system is based upon the driver being adjustable betwe...

A turret tool rest (14) includes a turret (24) movably supported on a base (22), on which desired tools can be mounted at predetermined indexable angled positions. A pair of coupling elements (66, 68), which can be engaged with each other, are arranged between the base (22) and the turret (24). The coupling elements (66, 68) are moved between an engaged position at which they are mutually engaged to fixedly hold the turret at respective indexed positions on the base, and a disengaged position at...

The invention is directed to an indexing attachment for a numerically controlled milling machine, comprising an indexing spindle rotatably supported in the casing for receiving a workpiece chuck, a bottom plate for fixing the casing on a worktable, and clamping means for fixing the indexing spindle in the various indexing positions. The indexing attachment is to be of simple and inexpensive structure and intended to permit--without any drive means of its own--programme-controlled indexing operat...

A microfilm card adapted to be used with a microfilm reading device. The card has an image area having a plurality of images arranged in rows and columns, at least one of the images containing an expanded index of the location of the images. An index area adjacent to the image area contains a plurality of indexes thereon, with the index area precisely and accurately positioned with respect to the image area. The indexes relate to their respective expanded index on the image area, the index viewa...

An indexing head has a plurality of co-axial discs rotatable relative to each other. A first disc carries an indexing pin receivable in a series of equi-angularly spaced recesses of a second disc. A third disc is angularly settable relative to the second disc by means of gauge blocks, and is lockable after setting by locking means. A tool shank can be releasably held in an axial bore of the first disc. When used in an oil bath of an erosion machine, the head is fitted with a bellows skirt to pre...

For use in a multi-page book, an index system comprising elongated flat transparent plastic index tabs each affixed by a strip of transparent adhesive tape. The tab overlies one edge of an associated page, projecting slightly outward therefrom so as to present an indicia bearing end and projecting a substantially greater distance inwardly thereof, terminating in an inner end. The transparent adhesive tape overlies the inner end, overlapping both the adjacent inner portion of the tab and the page...

An indexing chuck assembly to hold a work piece so work may be performed on it in differently rotated positions, as on a lathe. The chuck block is rotated between a lifting arm and a table member, the bottom of the chuck block having a cammed shaft which moves both rotationally and linearly as the chuck block is raised and lowered by the lifting arm. The cam shaft has a plurality of yoke cam grooves which engage a biased cam follower in the table member whereby the cam follower follows a reversi...

An indexing mechanism for a machine tool, comprising toolholding means for supporting a plurality of tools mounted for rotation, the toolholding means including first and second face coupling means for positioning and preventing rotation of the toolholding means, hydraulic cylinder means for raising and lowering said toolholding means in order to separate and bring together said first and second face coupling means, said toolholding means being rotatable when said first and second face coupling ...

An indexing apparatus for a machine tool or the like and having a rotatable index table, a compact rack and pinion drive mechanism including a unitary clutch for indexably moving said table to a plurality of approximate index positions relative to a work station, and mechanism for accurate positioning and holding the table in its various index positions and comprising a plurality of circumaxially spaced pins projecting from the table and one or more pin-engaging elements or yokes for selective e...

Indexing apparatus comprising, in combination: adjustment apparatus having a rotatable carrier, a rotatable mounting member supported by the carrier eccentrically to the axis of the carrier, a shaft nonrotatably connected to one side of the mounting member, eccentrically of the axis of the mounting member, the carrier and shaft axes being parallel to and equidistant from the axis of the mounting member, and on the other side of the mounting member, a pinion coaxial with the mounting member and n...