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Folder BLR

See Chuck Hensley's comprehensive index to articles in the BLR in the folder below.  It can be used to locate articles to research, whether found in the TCI LIbrary or elsewhere.

Chuck has offered to scan a limited number of pages from his collection (at his convenience).  Send requests using the "Contact Us" link in the Menu Bar above.

HINT:  Search for "BLR" followed by a topic keyword to find a series of related articles.  Use alphabetic sort to display them in chronological order.  e.g.  BLR PBX  or  BLR Picturephone.

When posted, complete scanned BLR issues from Sept. 1925 - Dec. 1961 were available here:
  https://worldradiohistory.com/Bell_Laboratories_Record_Issue_Key.htm

Categories

Folder BLR Collections
Folder BLR Index

Documents

Select Toggle Title Date Download
pdf 77Nov BLR P276 HORIZON PBX Design Development (2302 downloads) Popular Download (pdf, 1.33 MB)
pdf 76Apr BLR P91 First 50 Years (975 downloads) Popular Download (pdf, 2.68 MB)
pdf 76May BLR P115 Telephone After 50 (1495 downloads) Popular Download (pdf, 2.51 MB)
pdf 76Nov BLR P274 DIMENSION Custom Service (927 downloads) Popular Download (pdf, 1.78 MB)
pdf 75Aug BLR P288 G36 Handset (965 downloads) Popular Download (pdf, 1.95 MB)
pdf 75Dec BLR P427 Recycling Plastic (1230 downloads) Popular Download (pdf, 757 KB)
pdf 75Oct BLR P377 Transaction Telephone (936 downloads) Popular Download (pdf, 1.40 MB)
pdf 75Sep BLR P316 DIMENSION PBX (2881 downloads) Popular Download (pdf, 2.26 MB)
pdf 76Jan BLR P3 Touch A Matic 32 (1235 downloads) Popular Download (pdf, 1.30 MB)
pdf 76Mar BLR P61 Centalized Attendant Service (1060 downloads) Popular Download (pdf, 2.16 MB)
pdf 75Jan BLR P18 Customer Products Evolution (2395 downloads) Popular Download (pdf, 3.53 MB)
pdf 75Mar BLR P175 FlatScreen Video (628 downloads) Popular Download (pdf, 259 KB)
pdf 75May BLR P235 Design Line Telephones (999 downloads) Popular Download (pdf, 2.88 MB)
pdf 75May BLR P243 770A PBX New Features (1015 downloads) Popular Download (pdf, 2.69 MB)
pdf 73Apr BLR P99 Portable Conference Telephone - 50A Speakerphone (557 downloads) Popular Download (pdf, 1.98 MB)
pdf 33Mar BLR P210 Large Establishment PBX - 702A (583 downloads) Popular Download (pdf, 1.14 MB)
pdf 43Feb BLR P130 PBX For War (627 downloads) Popular Download (pdf, 1.15 MB)
pdf 64Apr BLR P114 PICTUREPHONE Service Experiments (352 downloads) Popular Download (pdf, 1.40 MB)
pdf 67Jun BLR P175 PICTUREPHONE Electron Tube (330 downloads) Popular Download (pdf, 1.43 MB)
pdf 68Jun BLR P206 PICTUREPHONE On Executive Desks (350 downloads) Popular Download (pdf, 351 KB)

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Recent Contributors

Thanks for new documents from Bruce Patterson, Jon Kolger, Paul Ivester, Len Hicken, Paul Fassbender, Fred Haynes, Kurt Rudolph, Wade ("Kellogg KITT"), the Connections Museum, Rick Walsh, Jeff Lamb, Jeremy Walters, Mark Cuccia, Alan David, Harry Joseph, Charlie Terry, Karl Brose, Dennis Hock, Tim Griffin, Remco Enthoven, and Steve Cichorsky.

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