An account of his invention was published on October 10, 1877, by which date Cros had devised a more direct procedure: the recording stylus could scribe its tracing through a thin coating of acid-resistant material on a metal surface and the surface could then be etched in an acid bath, producing the desired groove without the complication of an intermediate photographic procedure.

Edison's early patents show that he also considered the idea that sound could be recorded as a spiral onto a disc, but Edison concentrated his efforts on cylinders, since the groove on the outside of a rotating cylinder provides a constant velocity to the stylus in the groove, which Edison considered more " scientifically correct ".

The zinc disc was immersed in a bath of chromic acid ; this etched the groove into the disc where the stylus had removed the coating, after which the recording could be played.

The elastomeric belt absorbs motor vibrations and noise which could otherwise be picked up by the stylus.

In theory, it seems nearly ideal ; a stylus replicating the motion of the recording lathe used to cut the " master " record could result in minimal wear and maximum sound reproduction.

Modern touchscreens could be used in conjunction with stylus pointing devices, while those powered by infrared do not require physical touch, but just recognize the movement of hand and fingers in some minimum range distance from the real screen.

With the advent of the compact cassette and the compact disc in the 1980s, the easy reproduction of deep and loud bass was no longer limited by the ability of a phonograph record stylus to track a groove, and producers could add more low frequency content to recordings.

The stylus would receive the magnetic signal, which could then be decoded back as coordinate information.

* A tablet and stylus for written annotation of any file that could be displayed on the PC

24 more records were added to the first group in two additional containers in 1912, along with a hand-crank gramophone with spare stylus needles to insure the records could be played when unsealed.

Instead of the drawing stylus, the pad could as easily be operated by the user's fingers for less precision-demanding work, such as selecting between menu items ( i. e. using the pad as a kind of " indirect touch screen ").

In an interview on British TV show Something for the Weekend Reeves stated there were benefits to doing a radio show, as even more bizarre and outlandish images could be conjured, which could not be replicated using props on a television programme-such as balancing the whole of Ireland on a record stylus to stop it from skipping.

By mid-April 1877, Charles Cros had realized that a phonautograph recording could be converted back into sound by photoengraving the tracing into a metal surface to create a playable groove, then using a stylus and diaphragm similar to those of the phonautograph to reverse the recording process and recreate the sound.

Furthermore, due to the insecure clip holding the stylus, they could be knocked loose and potentially lost.

The application of hydraulics to cam-based automation resulted in tracing machines that used a stylus to trace a template, such as the enormous Pratt & Whitney " Keller Machine ", which could copy templates several feet across.

Romans used wax-coated wooden tablets ( pugillares ) upon which they could write and erase by using a stylus.

Commercial and naval fathometers of yesteryear used a strip chart recorder where an advancing roll of paper was marked by a stylus to make a permanent copy of the depth, usually with some means of also recording time ( Each mark or time ' tic ' is proportional to distance traveled ) so that the strip charts could be readily compared to navigation charts and maneuvering logs ( speed changes ).

Therefore the stylus could not be applied with the same degree of dexterity as a pen.

The term may also be used for information that is hand-recorded in other ways than writing, for example inscriptions that are chiselled upon a hard material or scratched ( the original meaning of graffiti ) as with a knife point in plaster or with a stylus on a waxed tablet ( the way Romans made notes ), or are in cuneiform writing, impressed with a pointed stylus in a flat tablet of unbaked clay.

A stylus linked to a diaphragm would be made to ride in the groove or on the ridge so that the stylus would be moved back and forth in accordance with the recorded vibrations.

Recording with his tinfoil phonograph was too difficult to be practical, as the tinfoil tore easily, and even when the stylus was properly adjusted, its reproduction of sound was distorted and squeaky, and good for only a few playbacks ; nevertheless Edison had hit upon the secret of sound recording.

* The arm must not resonate with vibrations induced by the stylus or from the turntable motor or plinth, so it must be heavy enough to be immune to those vibrations, or it must be damped to absorb them.

After perfectly balancing the arm, the dial itself is " zeroed "; the stylus force can then be dialed in by screwing the counterweight towards the fulcrum.

The original Mesopotamian writing system ( believed to be the world's oldest ) was derived from this method of keeping accounts circa 3600 BC, and by the end of the 4th millennium BC, this had evolved into using a triangular-shaped stylus pressed into soft clay for recording numbers.

For example, a mouse and stylus may both be used for pointing, but have different constants a and b associated with them.

Each character design can be traced by a stylus on a digitizing board, or modified from a scanned drawing of somewhat smaller size than that once used for the pantograph, or composed entirely within the computer graphics program itself.

Compared to touch-sensitive touchscreens, a graphics tablet generally offers much higher precision, the ability to track an object which is not touching the tablet, and can gather much more information about the stylus, but is typically more expensive, and can only be used with the special stylus or other accessories.

An inside start also had the advantage that the thread of material cut from the disc's surface, which had to be kept out of the path of the cutting stylus, was naturally thrown toward the center of the disc so was automatically out of the way.

In this case, however, the image is on the computer screen and the instrument you draw with might be a tablet stylus or a mouse.

Babylonian numerals were written in cuneiform, using a wedge-tipped reed stylus to make a mark on a soft clay tablet which would be exposed in the sun to harden to create a permanent record.

Cuneiform literally means " wedge-shaped ", due to the triangular tip of the stylus used for impressing signs on wet clay.

The earliest Edison phonographs used horizontal, spring-powered drives to carry the stylus across the recording at a pre-determined rate.

Though the archetypal pencil was an artist's brush, the stylus, a thin metal stick used for scratching in papyrus or wax tablets, was used extensively by the Romans, and for palm-leaf manuscripts.

A graphics tablet or digitizing tablet is a special tablet similar to a touchpad, but controlled with a pen or stylus that is held and used like a normal pen or pencil.

A stylus is a small pen-shaped instrument that is used to input commands to a computer screen, mobile device or graphics tablet.

The Student Electronic Notebook consisted of the Private Eye, Toshiba diskless AIX notebook computers ( prototypes ) and a stylus based input system plus virtual keyboard, and used direct-sequence spread spectrum radio links to provide all the usual TCP / IP based services, including NFS mounted file systems and X11, all running in the Andrew Project environment.

Clay tablets were used as the first known writing medium, inscribed with cuneiform script through the use of a blunt reed called a stylus.

When that mixture has dried, the metal stylus is used on the plate and thereby removes some of the grit particles, so that minuscule areas of copper are exposed to the acid and etched ; they will eventually hold the ink for the printing process.

Traditionally this has been interpreted as referring to the rod of the scribe, an object that in Assyrian monuments was a stylus of wood or metal used to inscribe clay tablets, or to write on papyrus ; as such, the ones who wielded it would have been the associates / assistants of lawgivers.

The acoustic tablet, or spark tablet, used a stylus that generated clicks with a spark plug.

These tablets used a magnetostriction technology which used wires made of a special alloy stretched over a solid substrate to accurately locate the tip of a stylus or the center of a digitizer cursor on the surface of the tablet.

By using electromagnetic signals, the tablet is able to sense the stylus position without the stylus having to even touch the surface, and powering the pen with this signal means that devices used with the tablet never need batteries.

; Active tablets: Active tablets differ in that the stylus used contains self-powered electronics that generate and transmit a signal to the tablet.

Some tablets, especially inexpensive ones aimed at young children, come with a corded stylus, using technology similar to older RAND tablets, although this design is no longer used on any normal tablets.