Who was the designer of the bakelite telephone?
The management chose the new soft material Bakelite and the skilful designer Johan Christian Bjerknes was picked to solve the problem together with artist Jean Heiberg. For the telephone manufacturers the move from plate to Bakelite was a total revolution.
Who was the first person to make Bakelite?
Bakelite is a generic named material based on the thermosetting phenol formaldehyde resin polyoxybenzylmethylenglycolanhydride, developed in 1907-1909 by Dr. Leo Baekeland. Formed by the reaction under heat and pressure of phenol and formaldehyde, generally with a wood flour filler, it was the first plastic made from synthetic polymers.
When did the Ericsson bakelite telephone become standard?
The authority had its own manufacturing right and in 1933 the phone became standard on the Swedish telenet with the model number m33.
When did the bakelite telephone replace the standing candle holder?
It also became an important prototype for the giant Bell Group’s new 300-model that in 1937 began to replace the unpractical, standing candle holder telephones prevalent in the US. In 1947 the Bakelite telephone was redesigned, using more plastic and American design.
How long did it take to make Bakelite casing?
It has been suggested that the time needed to make the casing was reduced from one week to around seven minutes. That is about how long it took for the hot moulding compound to cure and then, when the Bakelite press spit the casing out, it was ready to assemble over all components on the bottom metal plate.
Where did the Ericsson Bakelite phone come from?
Actually it was a Swedish-Norwegian collaboration since it was both developed and designed in Oslo by the historic manufacturer Elektrisk Bureau A/S. But Ericsson had bought that company in 1928 and asked AB Alpha in Sundbyberg in Sweden, another subsidiary, to make and distribute the Bakelite phone.