Word: step-by-step
(lookup in dictionary)
(lookup stats)
Dates: during 1931-1931
Sort By: most recent first
(reverse)
...Alexander Graham Bell invented the telephone in 1876. Some 3,000 patents for machine-switching devices have been filed in the U. S. alone. Out of all these patents, two main systems have evolved, the step-by-step and the panel.* The telephone subscriber cannot tell the two systems apart; the dials and the act of dialing look identical. But in the step-by-step system the mechanical combination necessary to ring the desired number is built up directly, by separate impulses from the dial. In the panel system, a more complicated mechanism (in panels) receives...
...step-by-step dialing system is based on Inventor Almon B. Strowger's patents of 1891. These patents were developed and exploited by Automatic Electric Inc., manufacturers of Strowger Automatic Dial Systems...
Bell Laboratories developed the panel dialing system, first installed it extensively in 1919. The Bell telephone companies (16 million telephones) also use a step-by-step system, through certain patent agreements with Automatic Electric Inc. By other reciprocal patent agreements, other manufacturers are enabled to make variants of the basic dialing systems, offering their wares to independent telephone companies (four million instruments...