Improvement in worktable apparatus having X and Y drive units for producing relative table-to-tool movements along perpendicular X and Y axes, respectively; the improvement consisting of indexing and cycling mechanisms for controlling table-to-tool movement and cycling of a tool unit, comprising a template having at least one physical characteristic varying along both the axes in accordance with the desired pattern of the movement and the cycling; first and second sensors, the template and the s...

A new and improved indexing table for supporting a workpiece on a machine tool and the like includes a base with a workpiece supporting table carried on a support shaft journaled for rotation to index the workpiece for machine tool operations. A drive system is provided for rotating the table in one direction about a longitudinal axis of the support shaft and an indexing wheel is provided on the shaft having a plurality of index slots spaced angularly around the periphery for securing the table ...

An indexing mechanism includes an index output shaft connected to a table or other apparatus for rotation therewith. A pinion is operatively connected to the shaft for rotation therewith to transmit rotational force to the table or apparatus. The pinion is rotated to a preset angular position by first and second drive gears, each of which are in engagement with the pinion. At least one motor is provided for carrying out rotation of the drive gears. One of the drive gears is rotated relative to t...

An indexing device comprises an indexing table fixed to a table shaft rotatably supported on a body structure. A worm shaft is rotatably supported on the body structure and has a worm formed thereon. An indexing gear is fixed coaxially to the indexing table. The indexing device has a rotation correction device for stopping the rotation of the worm shaft prior to the indexing operation of the indexing table. The indexing device further has a positioning device for operating, after the worm shaft ...

Synthetic nucleic acid molecules are provided which are called indexing linkers and which can be selectively linked to unknown, or non-identical cohesive ends of nucleic acid fragments. Such indexing linkers are useful for the selective isolation, identification, amplification, labelling, and modification, of nucleic acid fragments, especially subsets of such fragments released by cleavage using Type IIS restriction endonucleases or restriction endonucleases recognizing interrupted palindromic s...

Disclosed is a machine for advancing bakery pans in a step wise fashion along a production line. A rotary indexer having three radially extending arms mounted on a common shaft and spaced apart 120.degree. relative to adjacent arms is used to advance the pans step-wise one cup at a time. Each arm has distal ends at which rollers are mounted which engage the upper portion extending about the perimeter of each cup. A single stroke air cylinder has a wedge mounted to its piston. The wedge engages a...

An indexing apparatus for a rotary table has a support shaft rotatably supported by a base member in which indexed terminal positions of the rotary table is determined by abutment of a stopper member provided on the rotary table against positioning members provided on the base member. The indexing apparatus comprises a rack-pinion mechanism comprising a rack and a pinion fixed around the support shaft of the rotary table for rotating the same, a feed screw shaft rotatably supported by the base m...

An indexing apparatus includes a casing, an indexing unit, a gripping unit, a dynamic unit and a driving unit. The indexing unit includes a connecting rod journalled in the casing and having a top portion extending out of the casing, an indexing disc sleeved rigidly on the connecting rod, and several circumferentially equidistant limiting devices provided along the periphery of the indexing disc. The gripping unit slides along the periphery of the indexing disc and can engage with one of the lim...

An indexing apparatus for indexing an article about an axis. The indexing apparatus is adapted to be removably attached to the article and is constructed to axially displace the article along the axis to a disengaged position upon the initial application of a rotary force to an indexing assembly housed within the indexing apparatus. When in the disengaged position, the article can be selectively rotated about the axis by the further application of rotary force to the indexing assembly so that th...

A universal indexing device is shown that is flexible in use to accommodate multiple storage configurations including, but not limited to, vertical and horizontal storage. The indexing device includes a number of copies of an indexing symbol to accommodate a number of viewer angles. The indexing symbols are further oriented for convenient comprehension by the user. The flexible indexing device can be manufactured simply, out of a single piece of starting material and one product can be used to r...