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

Documents

pdf 56Apr BLR P140 1A1 Key Tel Sys KTS Popular

1009 downloads

Download (pdf, 659 KB)

56Apr_BLR_P140_1A1_Key_Tel_Sys_KTS.pdf

56Apr BLR P140 1A1 Key Tel Sys KTS

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 56Aug BLR P294 Aluminum Booth Popular

687 downloads

Download (pdf, 778 KB)

56Aug_BLR_P294_Aluminum_Booth.pdf

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 56Aug BLR P298 Telephone Protectors Popular

670 downloads

Download (pdf, 1.20 MB)

56Aug_BLR_P298_Telephone_Protectors.pdf

56Aug BLR P298 Telephone Protectors

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 56Aug BLR P313 5300 Type Set Popular

380 downloads

Download (pdf, 224 KB)

56Aug_BLR_P313_5300_Type_Set.pdf

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 56Jun BLR P208 1A Speakerphone 592 Popular

649 downloads

Download (pdf, 1.55 MB)

56Jun_BLR_P208_1A_Speakerphone_592_r2.pdf

56Jun BLR P208 1A Speakerphone 592

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 56Mar BLR P116 Tone Ringer Trial Popular

374 downloads

Download (pdf, 558 KB)

56Mar_BLR_P116_Tone_Ringer_Trial.pdf

56Mar BLR P116 Tone Ringer Trial

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 56May BLR P165 Answer Set Popular

369 downloads

Download (pdf, 1.39 MB)

56May_BLR_P165_Answer_Set.pdf

56May BLR P165 Answer Set

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 71Jan BLR P22 558A PBX Popular

963 downloads

Download (pdf, 995 KB)

71Jan_BLR_P22_558A_PBX.pdf

71Jan BLR P22 558A PBX

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 54Feb BLR P69 Dial Governors Popular

443 downloads

Download (pdf, 961 KB)

54Feb_BLR_p69_Dial_Governors.pdf

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 54Mar BLR P96 Telephone Hazardous Areas KS14476 Popular

408 downloads

Download (pdf, 340 KB)

54Mar_BLR_p96_Telephone_Hazardous_Areas_KS14476.pdf

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 54May BLR P197 Coinless Payphone Popular

401 downloads

Download (pdf, 224 KB)

54May_BLR_p197_Coinless_Payphone.pdf

54May BLR P197 Coinless Payphone

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 54Nov BLR P439 Hard of Hearing 532 Popular

371 downloads

Download (pdf, 228 KB)

54Nov_BLR_p439_Hard_Hearing_532.pdf

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 54Oct BLR P366 Universal Ringer C4A Popular

576 downloads

Download (pdf, 1.53 MB)

54Oct_BLR_p366_Universal_Ringer_C4A.pdf

54Oct BLR P366 Universal Ringer C4A

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 52dec BLR P456 Telephone Repair Reuse Popular

411 downloads

Download (pdf, 620 KB)

52dec_BLR_p456_Telephone_Repair_Reuse.pdf

52dec BLR P456 Telephone Repair Reuse

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 53apr BLR P130 U1 Receivers Adjustment Popular

395 downloads

Download (pdf, 1.13 MB)

53apr_BLR_p130_U1_Receivers_Adjustment.pdf

53apr BLR P130 U1 Receivers Adjustment

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 53apr BLR P158 Installers Tool Case Popular

410 downloads

Download (pdf, 156 KB)

53apr_BLR_p158_Installers_Tool_Case.pdf

53apr BLR P158 Installers Tool Case

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 53jan BLR P9 Lag Linemans Wrench Popular

455 downloads

Download (pdf, 267 KB)

53jan_BLR_p9_Lag_Linemans_Wrench.pdf

53jan BLR P9 Lag Linemans Wrench

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 53jan BLR P22 Early Dial Systems Popular

570 downloads

Download (pdf, 1.35 MB)

53jan_BLR_p22_Early_Dial_Systems.pdf

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 53jun BLR P236 Robot Secretary Popular

346 downloads

Download (pdf, 237 KB)

53jun_BLR_p236_Robot_Secretary.pdf

53jun BLR P236 Robot Secretary

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 53nov BLR P439 1A Answering Set Popular

383 downloads

Download (pdf, 1.35 MB)

53nov_BLR_p439_1A_Answering_Set.pdf

53nov BLR P439 1A Answering Set

Bell Labs Record.  Contributed by Chuck Hensley.

New User?

Read the articles under "Introduction" in the black menu bar above.

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.

Please send a file to add your name to this list!

Who's online

We have 1059 guests online

Hints for using the TCI Library

"Menu Bar" for site navigation.
Many menu choices are hidden until you mouse over words in the black Menu Bar (above).  If you want help getting started, see the links under the word "Introduction" in the Menu Bar.
 
The user interface is oriented toward the user’s choice to either Browse or Search for information.  The Browse the Library menu entry offers many quick links to move around the Library quickly.  Try it!

Three search options.
The Library’s keyword-based searches, called Basic Search and Advanced Search, accept keywords as short as 2 characters (WE, AE, etc.) and search strings up to 255 characters.  If you get more than 1,000 items, refine your search or try the Google Search option.
 
When selected from the Menu Bar, Google only searches for files in the TCI Library.
 
Library INBOX.
The INBOX may hold some files that have been submitted but not fully processed into the Library.  These are often topics of current discussion on the TCI Email Group. Items in the INBOX are not found using Basic or advanced searches, but ARE found by a Google Search.
 
Remember to check the INBOX if you don't find something with the other searches.
 
Finding BSPs.
Many BSPs are currently only identified by BSP number. If a text search doesn’t produce a BSP, try looking in one of the many BSP index documents to find a BSP number for the product you are researching just as you would do if referencing a paper library of the BSPs. Then enter the BSP number in the search box.
 
Finding CDs and SDs.
Some related CDs and SDs are filed in different areas. Try searching for just the numeric portion of the name.  Remember to check the INBOX if you don't find something with the Basic or Advanced searches -- or use the Google search.
 
Compact Category Listing.
When browsing, to change the category listing view from normal to compact, click on Browse the Library in the black menu bar.
 
To change from compact to normal view, click on Document Repository in the drop down under Browse the Library.