Patent holder; demonstrated a working telephone in 1876
Thomas A. Watson
Bell’s assistant, who built the apparatus
Elisha Gray
Filed a caveat for a similar device on the same day as Bell’s patent application
Antonio Meucci
Italian inventor who developed voice-transmission devices in the 1850s–60s
Philipp Reis
German teacher who transmitted musical tones in 1861
Illustrative photograph, not the original artifact. Photograph: ebuyıldız / Pexels
About this date
The patent (U.S. No. 174,465) was granted to Alexander Graham Bell on 7 March 1876, and the first intelligible words were transmitted on 10 March 1876. Priority has been contested.
About credit
Bell received the patent. Gray filed a caveat on the same day, Reis and Meucci had earlier prototypes, and in 2002 the U.S. House of Representatives passed a resolution honouring Meucci’s contributions. Historians weigh the competing claims differently.
Chapter II
The world before
Messages travelled at the speed of people
Until the 1830s, a message could move no faster than a horse, a ship or a train. The electric telegraph, developed from the 1830s and 1840s, sent coded signals across wires but needed trained operators and offices.
Ordinary people could not talk to someone in another town in the moment. Business and personal communication depended on letters.
II
The human achievement
Teaching speech, transmitting speech
Alexander Graham Bell, a Scottish-born teacher of speech to deaf students, was working on ways to send several telegraph messages over one wire, and on devices to represent sound visually. His mother and, later, his wife Mabel Hubbard were deaf.
With his assistant Thomas Watson, Bell built a transmitter and receiver. On 10 March 1876 he recorded in his notebook that he called to Watson from another room: “Mr. Watson, come here – I want to see you.” Watson heard the words through the apparatus.
Bell’s patent application was filed on 14 February 1876, the same day Elisha Gray filed a caveat describing a similar liquid transmitter. The priority dispute went to the courts, and Bell’s patent was upheld.
III
Understanding the invention
How it works
A telephone turns sound into electricity and back into sound.
01
Step 01 of 04
Speech vibrates a diaphragm
Sound waves from a voice push a thin disc back and forth.
Speech vibrates a diaphragm
Vibration varies a current
The signal travels along the wire
A receiver rebuilds the sound
IV
The transformation
What changed for humanity
Business
Merchants, brokers and offices could coordinate instantly. By the 1880s telephone exchanges linked entire cities.
Emergency response
Doctors, fire brigades and police could be reached directly.
Home life
Families and friends could keep in touch across long distances, and the telephone became a household object over the 20th century.
Networks
The need for switching and signal quality fuelled research at Bell Laboratories, where the transistor was invented in 1947.
It collapsed distance for conversation. For the first time, people could hear one another’s voices in real time, regardless of how far apart they were.
V
Before and after
Life before and after The Telephone
Before
Send a messenger and wait for a reply.
After
Call and describe symptoms immediately.
On larger screens, drag the divider (or use the arrow keys) to give more room to the world before or after.
Bell Labs produced the transistor, the foundation of modern computing.
Beyond the collection
Mobile phones
The first handheld cellular call was made in 1973 by Martin Cooper of Motorola.
Beyond the collection
Radio and broadcasting
The same principles of transducing sound underpin microphones, speakers and recording.
VII
Human stories
The people and the moments
A teacher of the deaf
Bell’s work grew from a lifelong interest in speech and hearing. It is a reminder that major inventions often come from people trying to solve a human problem rather than build a business.
A crowded field
Several inventors came close to a working telephone within a few years. The patent decided who owned the idea, but history records many contributors.
Where accounts differ, this museum follows the documented record and says so.
