The Machine Tool Division is currently producing Brown & Sharpe single spindle automatic screw machines, grinding machines of many types, and knee and bed-type milling machines.

it incorporates an automatic knot-tying device on each spindle, and it will knot a break in the yarn in 10 seconds as well as tie in new bobbins as the running end is exhausted.

The drill press consists of a vertical shaft ( spindle ) which is tapered or threaded on one end to hold a drill chuck, a tubular housing ( quill ) in which the spindle is mounted, a head in which the quill is mounted, a feed lever which moves the quill up or down, a power source, and a movable table upon which the work is placed.

The size of the press is usually expressed in terms of chuck capacity ( the maximum diameter tool shank it will hold ) or distance between the spindle center and the column.

Most drill presses have a quill return spring that raises the spindle automatically when the feed lever is released and holds the quill in the raised position.

* Mitosis: usually closed with an intranuclear spindle ; in some species it is open at the poles

Inside the bulb, on a low friction spindle, is a rotor with several ( usually four ) vertical lightweight metal vanes spaced equally around the axis.

binding microtubules and signalling to the cell cycle machinery when all chromosomes have adopted correct attachments to the spindle, so that it is safe for cell division to proceed to completion ( i. e. for cells to enter anaphase ).

It is now believed that this complex is mostly released from chromosome arms during prophase, so that by the time the chromosomes line up at the mid-plane of the mitotic spindle ( also known as the metaphase plate ), the last place where they are linked with one another is in the chromatin in and around the centromere.

In addition, researchers have identified three types of sleep ( SWS, sleep spindle and REM ) in which declarative memory is consolidated.

Critics point out that spindle activity is positively correlated with intelligence.

The spindle whorl itself is dated from the year 1000 to 1100 AD.

This reflex is easily studied because it consists of only two neurons: a sensory neuron ( the muscle spindle fiber ) and the motor neuron.

This is because later, in Anaphase I, the sister chromatids will remain together as the spindle fibers pull the pair toward the pole of the new cell.

A notable structure involving microtubules is the mitotic spindle used by most eukaryotic cells to segregate their chromosomes correctly during cell division.

This structure is rich in microtubules and is built up of microtubules which originally made part of the spindle.

Robert Berg ’ s theory is that the bannerstone was carried by hunters as a spindle weight to produce string from natural fibers gathered while hunting, for the purpose of tying on fletching and hafting stone or bone points.

As kinetochore microtubules from both centrioles attach to their respective kinetochores, the homologous chromosomes align along an equatorial plane that bisects the spindle, due to continuous counterbalancing forces exerted on the bivalents by the microtubules emanating from the two kinetochores of homologous chromosomes.

In vertebrate cells, " slippage " through the mitotic checkpoint leading to premature M phase exit can occur despite the delay of this exit by the spindle checkpoint.

The two joints are connected by a third shaft, called the spindle.

Although the original hand tool has a few advantages over the power tool equivalent and retains favour with some workers, since about 1960, it has all but been replaced by the modern spindle router, which was designed for the same work, although the first electric hand routers appeared in the years just after World War I.

The spindle router is positioned at the finer end of the scale of work done by a moulding spindle.

They do this by hand-reeling the threads onto a wooden spindle to produce a uniform strand of raw silk.

The first stage in mechanizing the process was mounting the spindle horizontally so it could be rotated by a cord encircling a large, hand-driven wheel.

The spun yarn was then wound onto the spindle by moving it so as to form a right angle with the spindle.

In 1533, a citizen of Brunswick is said to have added a treadle, by which the spinner could rotate her spindle with one foot and have both hands free to spin.

The charkha works similarly to the great wheel, with a drive wheel being turned by hand, while the yarn is spun off the tip of the spindle.

Once a sufficient amount of yarn has been made, the spinner turns the wheel backward a short distance to unwind the spiral on the spindle, then turns it clockwise again, and winds the newly made yarn onto the spindle, finishing the wind-on by spiraling back out to the tip again to make another draw.

When the centrioles are irradiated by a laser, mitosis proceeds normally with a morphologically normal spindle.

In the absence of the centrioles the microtubules of the spindle are focused by motors allowing the formation of a bipolar spindle.

The spindle, carved to reduce friction at one end and maximize it at the other, is held in a hole in the bottom of the bearing block, and at the other by the hearth ( fireboard ).

The hand drill is a similar method, but uses a longer, thinner spindle ; and instead of a bearing block and bow combination, the downward pressure and spinning is achieved by rubbing the hands together around the spindle.

Full-floating axle shafts are retained by the aforementioned flange bolted to the hub, while the hub and bearings are retained on the spindle by a large nut.

The runner stone is supported by a cross-shaped metal piece ( rind or rynd ) fixed to a " mace head " topping the main shaft or spindle leading to the driving mechanism of the mill ( wind, water ( including tide ) or other means ).

a = bed, b = carriage ( with cross-slide and toolpost ), c = headstock, d = back gear ( other geartrain nearby below drives leadscrew ), e = cone pulley for Line shaft | belt drive from an external power source, f = faceplate mounted on spindle, g = tailstock.

1. Hopper 2. Shoe 3. Crook string 4. Shoe handle 5. Damsel 6. Eye 7. Runner stone 8. Bedstone 9. Rind 10. Mace 11. Stone spindle 12. Millstone support 13. Wooden beam 14. Casing ( Tentering gear not shown )

Each gear hobbing machine typically consists of a chuck and tailstock, to hold the workpiece or a spindle, a spindle on which the hob is mounted, and a drive motor.

The aluminum disc is supported by a spindle which has a worm gear which drives the register.

The valve gear was insufficiently robust and the valve spindle guides ( originally cast iron ) had to be replaced in cast steel.

Drive from all three cylinders was concentrated on the middle coupled axle whilst the outside cranks were set at 120 °, with the inside crank displaced by about 7 degrees to allow for the 1: 8 inclination of the inside cylinder using Gresley conjugated valve gear to derive the motion of the inside valve spindle from the two outside valve spindles.

On older machines the spindle was directly driven by a flat belt pulley with lower speeds available by manipulating the bull gear.

Tumbler gears ( operated by H5 ) are provided between the spindle and gear train along with a quadrant plate that enables a gear train of the correct ratio and direction to be introduced.

The image shows a reduction gear box ( T2 ) between the handwheel and spindle, this is a feature found only in the larger center lathes, where large drills may necessitate the extra leverage.

At the same time the state of the art in gear and bearing practice was advancing to the point that manufacturers began to make fully geared headstocks, using gearboxes analogous to automobile transmissions to obtain various spindle speeds and feed rates while transmitting the higher amounts of power needed to take full advantage of high speed steel tools.