1959 - History of Ericsson - History of Ericsson

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Fig. 18 X8135 The locations of the milled slots for microphone and loudspeaker Fig. 19 x 8136 General appearance of the final prototype 116 In actual production the vacuum-forming method and milling of slots will be replaced by compression moulding. Finally, a few words about a designer's working methods in their application to telephony. At least as regards casings and similar types of design, his methods may be fairly similar to those of an architect when planning an industrial installation. If we consider a chemical plant, for example, the architect has to organize the supply systems and other apparatus in consultation with specialists on such problems, and to coordinate the whole within a casing of sound design. This casing is nothing else than the factory building itself. In the planning of telephone equipment, as of industrial buildings, the work should start with a study of component assembly diagrams, followed by the preparation of wiring diagrams and plan drawings, and the compilation of the necessary technical data. The importance of a penetrating study of the programme also within teletechnical design cannot be sufficiently emphasized. On the groundwork of comprehensive planning work one can proceed to preliminary sketches, consisting of perspective sketches supplemented by plan
Fig. 20 X813 The Ericovox loudspeaking telephone with the Ericofon and sectional drawings. The sketch proposals are then discussed with specialists from the planning office, and also from the workshop and sales departments. He then modifies his proposals to take account of the criticism offered and proceeds thereafter to an increasingly penetrating study of different aspects of the product. Detailed and main drawings and ciay mock-up models are finally followed by operating models. 117
Page 1: 4 1959
Page 4 and 5: Ericovox, the One-Piece Loudspeakin
Page 6 and 7: Fig. 3 X 8156 Block schematic of co
Page 8 and 9: Fig. 5 x 8163 The Ericovox, L M Eri
Page 10 and 11: Fig. 8 X 2443 Sending frequency res
Page 12 and 13: 108 The Ericovox meets the requirem
Page 14 and 15: Fig. 3 Grouping of components in wi
Page 16 and 17: Fig. 9 X 8132 Case with pyramid-sha
Page 18 and 19: Fig. 12 X8134 Instrument with base
Page 22 and 23: Gothenburg Automatic Transit Exchan
Page 24 and 25: Fig. 3 x 8181 Block schematic of gr
Page 26 and 27: Fig. 6 122 x 8180 Block schematic o
Page 28 and 29: Fig. 8 X 2472 Link circuits for ori
Page 30 and 31: Fig. 10 X8182 Traffic supervisor's
Page 32 and 33: Fig. 2 X8167 Relay switchboard AMD
Page 34 and 35: 130 Priority The switchboard is des
Page 36 and 37: Crossbar Exchange Installed on Larg
Page 38 and 39: L M Ericsson to Undertake First C.T
Page 40: The Ericsson Group Associated and c

1959 - History of Ericsson - History of Ericsson

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