Which is the other important creation of abraham graham Bell which people in general do not kno?

Answer 1

ah, yes.......abraham graham bell.......non-identical twin step-brother to alexander graham bell. he invented the doofus whop.

Answer 2

Do you mean Alexander Graham Bell?

Answer 3

It is Alexander Graham Bell
http://www.gardenofpraise.com/ibdbell.htm

Answer 4

"abraham" graham Bell? You got me.


(I was gonna say the abraham graham cracker...)

Answer 5

The photophone

Another of Bell's inventions was the photophone, a device enabling the transmission of sound over a beam of light, which he developed together with Charles Sumner Tainter. The device employed light-sensitive cells of crystalline selenium, which has the property that its electrical resistance varies inversely with the illumination (i.e., the resistance is higher when the material is in the dark, and lower when it is lighted). The basic principle was to modulate a beam of light directed at a receiver made of crystalline selenium, to which a telephone was attached. The modulation was done either by means of a vibrating mirror, or a rotating disk periodically obscuring the light beam.

This idea was by no means new. Selenium had been discovered by Jöns Jakob Berzelius in 1817, and the peculiar properties of crystalline or granulate selenium were discovered by Willoughby Smith in 1873. In 1878, one writer with the initials J.F.W. from Kew described such an arrangement in Nature in a column appearing on June 13, asking the readers whether any experiments in that direction had already been done. In his paper on the photophone, Bell credited one A. C. Browne of London with the independent discovery in 1878—the same year Bell became aware of the idea. Bell and Tainter, however, were apparently the first to perform a successful experiment, by no means any easy task, as they even had to produce the selenium cells with the desired resistance characteristics themselves.

In one experiment in Washington, D.C. the sender and the receiver were placed on different buildings some 700 feet (213 metres) apart. The sender consisted of a mirror directing sunlight onto the mouthpiece, where the light beam was modulated by a vibrating mirror, focused by a lens and directed at the receiver, which was simply a parabolic reflector with the selenium cells in the focus and the telephone attached. With this setup, Bell and Tainter succeeded to communicate clearly.

The photophone was patented on December 18, 1880, but the quality of communication remained poor and the research was not pursued by Bell. Later on this helped in the discovery of fiber optics and laser communication systems.

Metal detector

Bell is also credited with the invention of the metal detector in 1881. The device was hurriedly put together in an attempt to find the bullet in the body of U.S. President James Garfield. The metal detector worked, but didn't find the bullet because the metal bedframe the President was lying on confused the instrument. Bell gave a full account of his experiments in a paper read before the American Association for the Advancement of Science in August 1882. Though unsuccessful in its first incarnation, this achievement would eventually change the nature of physical security.

The hydrofoil

The March 1906 Scientific American article by American hydrofoil pioneer William E. Meacham explained the basic principle of hydrofoils. Bell considered the invention of the hydroplane as a very significant achievement. Based on information gained from that article he began to sketch concepts of what is now called a hydrofoil boat.

Bell and Casey Baldwin began hydrofoil experimentation in the summer of 1908 as a possible aid to airplane takeoff from water. Baldwin studied the work of the Italian inventor Enrico Forlanini and began testing models. This led him and Bell to the development of practical hydrofoil watercraft.

During his world tour of 1910–1911 Bell and Baldwin met with Forlanini in Italy. They had rides in the Forlanini hydrofoil boat over Lake Maggiore. Baldwin described it as being as smooth as flying. On returning to Baddeck a number of designs were tried culminating in the HD-4, using Renault engines. A top speed of 54 miles per hour was achieved, with rapid acceleration, good stability and steering, and the ability to take waves without difficulty.In 1913, Dr. Bell hired Walter Pinaud, a Sydney yacht designer and builder as well as the proprietor of Pinaud's Yacht Yard in Westmount, Nova Scotia to work on the pontoons of the HD-4. Pinaud soon took over the boatyard at Bell Laboratories on Beinn Bhreagh, Bell's estate near Baddeck, Nova Scotia. Pinaud's experience in boatbuilding enabled him to make useful design changes to the HD-4 however soon WWI intervened. After WWI work began again on the HD-4. Bell's report to the navy permitted him to obtain two 350 horsepower (260 kW) engines in July 1919. On September 9, 1919 the HD-4 set a world's marine speed record of 70.86 miles per hour. This record stood for ten years.

Aeronautics

Bell was a supporter of aerospace engineering research through the Aerial Experiment Association, officially formed at Baddeck, Nova Scotia in October 1907 at the suggestion of Mrs. Mabel Bell and with her financial support. It was headed by the inventor himself. The founding members were four young men, American Glenn H. Curtiss, a motorcycle manufacturer who would later be awarded the Scientific American Trophy for the first official one-kilometre flight in the Western hemisphere and later be world-renowned as an airplane manufacturer; Frederick W. "Casey" Baldwin, the first Canadian and first British subject to pilot a public flight in Hammondsport, New York; J.A.D. McCurdy; and Lieutenant Thomas Selfridge, an official observer from the U.S. government. One of the project's inventions, the aileron, is a standard component of aircraft today. (The aileron was also invented independently by Robert Esnault-Pelterie.)

Bell experimented with box kites and wings constructed of multiple compound tetrahedral kites covered in silk. The tetrahedral wings were named Cygnet I, II and III, and were flown both unmanned and manned (Cygnet I crashed during a flight carrying Selfridge) in the period from 1907-1912. Some of Bell's kites are on display at the Alexander Graham Bell National Historic Site.

Other Inventions

Bell had made many other inventions in his life. They include the Metal vacuum jacket that assists in breathing, the Audiometer to detect minor hearing problems, a device that locates icebergs, investigated on how to separate salt from seawater, and also worked on finding alternative fuels.