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The Telephone Museum, Inc. (@thetelephonemuseum) Instagram Profile Photothetelephonemuseum

The Telephone Museum, Inc.

 image by The Telephone Museum, Inc. (@thetelephonemuseum) with caption : "On This Day in Telephone History December 15TH 1888 - Patent issued to Hammond V. Hayes, later chief engineer, AT&T Comp" - 1934815865880719910
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On This Day in Telephone History December 15TH 1888 - Patent issued to Hammond V. Hayes, later chief engineer, AT&T Company, on the common battery switchboard. In earlier telephone systems, each telephone was equipped with a set of batteries which required constant testing and replenishing. The common battery switchboard made it possible for one main battery at the central office to supply current for nearly all telephones connected to it. A few telephones at great distances from the office may need supplemental batteries. ••• ☎☎☎☎☎☎☎☎☎☎.. ☎☎☎☎☎☎☎☎☎☎ •••☎☎☎☎☎☎☎☎☎☎.. ☎☎☎☎☎☎☎☎☎☎ #electricalengineers

Marcus Eugênio de Almeida (@marcus.eugenio.almeida) Instagram Profile Photomarcus.eugenio.almeida

Marcus Eugênio de Almeida

 image by Marcus Eugênio de Almeida (@marcus.eugenio.almeida) with caption : "Pequena central hidrelétrica no Sul do Brasil... super compacta" - 1934371513966560335
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Pequena central hidrelétrica no Sul do Brasil... super compacta

The Telephone Museum, Inc. (@thetelephonemuseum) Instagram Profile Photothetelephonemuseum

The Telephone Museum, Inc.

 image by The Telephone Museum, Inc. (@thetelephonemuseum) with caption : "On This Day in Telephone History December 14TH 1967 - The Bell System's Picturephone® see-while-you-talk set was complet" - 1934115295511548690
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On This Day in Telephone History December 14TH 1967 - The Bell System's Picturephone® see-while-you-talk set was completely redesigned to incorporate additional features that earlier trials showed the public wanted. The new set was shown at a press demonstration in New York City. The improved Model II set will be given trials at the Westinghouse Corp. locations in Pittsburgh and New York in early 1969. ••• ☎☎☎☎☎☎☎☎☎☎.. ☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎.. ☎☎☎☎☎☎☎☎☎☎ ••• #electricalengineers

BNA Consulting (@bna.consulting) Instagram Profile Photobna.consulting

BNA Consulting

 Instagram Image by BNA Consulting (@bna.consulting) with caption : "The invitation to design the Vietnam Memorial Wall in Layton, Utah was an honor to accept for BNA. Central to the projec" at Layton Commons Park - 1933524033317744704

The invitation to design the Vietnam Memorial Wall in Layton, Utah was an honor to accept for BNA. Central to the project was illuminating the wall with a tasteful approach that provides an impactful experience to all who visit. Providing a safely illuminated area and illuminating the memorial wall so that it made a statement was achieved with post light fixtures and in-grade light fixtures. #electricalengineers

Marcus Eugênio de Almeida (@marcus.eugenio.almeida) Instagram Profile Photomarcus.eugenio.almeida

Marcus Eugênio de Almeida

 image by Marcus Eugênio de Almeida (@marcus.eugenio.almeida) with caption : "Rio cheio, barragem descarregando o excesso de água" - 1933465622291554548
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Rio cheio, barragem descarregando o excesso de água