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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 60Mar BLR P82 Push Button Dialing Media Hamden Elgin (372 downloads) Popular Download (pdf, 2.03 MB)
pdf 60Nov BLR P433 Spring Cords (332 downloads) Popular Download (pdf, 298 KB)
pdf 61Jan BLR P14 Field Testing Electronic Tone Ringer Tel Crystal Lake (322 downloads) Popular Download (pdf, 1000 KB)
pdf 61Jul BLR P240 Overseas Dialing (329 downloads) Popular Download (pdf, 1.81 MB)
pdf 61May BLR P161 Pushbutton PBX 608A (648 downloads) Popular Download (pdf, 1.54 MB)
pdf 61May BLR P185 Trimline Contour Field Trial Richmond VA (399 downloads) Popular Download (pdf, 223 KB)
pdf 61Oct BLR P350 Automatic Card Dialer 40A (599 downloads) Popular Download (pdf, 905 KB)
pdf 61Sep BLR P313 Touch-Tone Calling Versatility (362 downloads) Popular Download (pdf, 1.04 MB)
pdf 62Jun BLR P220 Single Slot Coin Set Trial Norfolk (325 downloads) Popular Download (pdf, 308 KB)
pdf 62Mar BLR P74 - Low Speed Data Set (369 downloads) Popular Download (pdf, 2.02 MB)
pdf 63Aug BLR P269 TouchTone Card Dialer Trial Greensburg Findlay (462 downloads) Popular Download (pdf, 1.36 MB)
pdf 63Aug BLR P273 Trimline Ending Dial In Handset Trials (421 downloads) Popular Download (pdf, 153 KB)
pdf 63Jan BLR P2 FM Data Set (380 downloads) Popular Download (pdf, 1.86 MB)
pdf 63Jan BLR P12 PBX Range Charts (438 downloads) Popular Download (pdf, 1.35 MB)
pdf 63Jun BLR P218 Home Interphone (445 downloads) Popular Download (pdf, 1.56 MB)
pdf 63Jun BLR P237 PBX Consoles (1146 downloads) Popular Download (pdf, 1.13 MB)
pdf 63Oct BLR P354 Testing TouchTone Set (570 downloads) Popular Download (pdf, 1.62 MB)
pdf 64Aug BLR P247 761A PBX Small Hotel Motel (473 downloads) Popular Download (pdf, 1.58 MB)
pdf 64May BLR P159 Handsets With Amplifiers G6 G7 G8 (410 downloads) Popular Download (pdf, 1.22 MB)
pdf 65Nov BLR P395 Designing Telephone Ringers (681 downloads) Popular Download (pdf, 1.06 MB)

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Recent Contributors

Thanks for new documents from Ed Palazzo, 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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