Orthographic projection drawing of an arm-chair. An orthographic projection is the method of representing the exact form of an object in two or more views on planes generally at right angles to each other, by dropping perpendiculars from the object to the planes.

Orthographic Projection of Arm-Chair

Orthographic projection drawing of an arm-chair. An orthographic projection is the method of representing…

Boy with telephone.

Boy

Boy with telephone.

Girl with telephone.

Girl

Girl with telephone.

An illustration of a jester using a phone which is attached to a phonograph.

Jester & Phone

An illustration of a jester using a phone which is attached to a phonograph.

Samuel F. B. Morse's original model of the telegraph insrument.

Telegraph

Samuel F. B. Morse's original model of the telegraph insrument.

A telegraph in which the letters of the alphabet or figures are placed on a circular plate in such a manner that they can be brought to succession to an opening, or indicated in sucession in some other way, as by a pointer.

Disc Telegraph

A telegraph in which the letters of the alphabet or figures are placed on a circular plate in such a…

Alexander Graham Bell's original model of the telephone reciever and transmitter.

telephone

Alexander Graham Bell's original model of the telephone reciever and transmitter.

A typical phone call, traditionally, is placed by picking the phone handset up off the base and holding the handset so that the hearing end is next to the user's ear and the speaking end is within range of the mouth. The caller would then rotary dial or press buttons for the phone numbers needed to complete the call.

Placing a Phone Call

A typical phone call, traditionally, is placed by picking the phone handset up off the base and holding…

Credit for the invention of the electric telephone is frequently disputed, and new controversies over the issue have arisen from time-to-time. As with other great inventions such as radio, television, light bulb, and computer, there were several inventors who did pioneering experimental work on voice transmission over a wire and improved on each other's ideas.

Telephone Transmitting Device

Credit for the invention of the electric telephone is frequently disputed, and new controversies over…

This sign indicates that a telephone is located nearby.

Telephone, Black and White

This sign indicates that a telephone is located nearby.

The candlestick or upright telephone was used in the early to mid-twentieth century.

Candlestick Telephone

The candlestick or upright telephone was used in the early to mid-twentieth century.

Orthographic projection drawing of a candlestick or upright telephone. An orthographic projection is the method of representing the exact form of an object in two or more views on planes generally at right angles to each other, by dropping perpendiculars fro the object to the planes.

Orthographic Projection of Candlestick Telephone

Orthographic projection drawing of a candlestick or upright telephone. An orthographic projection is…

An illustration of one of the early telephones, known as a chemical telephone. Some used a liquid transmitter, some had a metal diaphragm that induced current in an electromagnet wound around a permanent magnet, and some were "dynamic" - their diaphragm vibrated a coil of wire in the field of a permanent magnet or the coil vibrated the diaphragm.

Chemical Telephone

An illustration of one of the early telephones, known as a chemical telephone. Some used a liquid transmitter,…

This sign indicates that a telephone is located nearby.

Telephone, Color

This sign indicates that a telephone is located nearby.

An instrument that converts voice and other sound signals into a form that can be transmitted to remote locations and that receives and reconverts waves into sound signals.

Early Model Telephone

An instrument that converts voice and other sound signals into a form that can be transmitted to remote…

An instrument that converts voice and other sound signals into a form that can be transmitted to remote locations and that receives and reconverts waves into sound signals.

Early Use Telephone

An instrument that converts voice and other sound signals into a form that can be transmitted to remote…

This telephone uses magnets that converts sound into electrical signals to be transmitted over distances and then converts the signals back.

First uses of the Telephone

This telephone uses magnets that converts sound into electrical signals to be transmitted over distances…

This sign indicates that a telephone is located nearby.

Telephone, Outline

This sign indicates that a telephone is located nearby.

This sign indicates that a telephone is located nearby.

Telephone, Silhouette

This sign indicates that a telephone is located nearby.

A tin can telephone is a type of voice-transmitting device made up of two tin cans, paper cups or similar articles attached to either end of a string.

Tin Can Telephone

A tin can telephone is a type of voice-transmitting device made up of two tin cans, paper cups or similar…