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 71Apr BLR P127 PICTUREPHONE For Business 850A PBX Popular

557 downloads

Download (pdf, 804 KB)

71Apr_BLR_P127_PICTUREPHONE_For_Business_850A_PBX.pdf

71Apr BLR P127 PICTUREPHONE For Business 850A PBX

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 71Feb BLR P61 Card Dialer ANSI Cards Popular

609 downloads

Download (pdf, 268 KB)

71Feb_BLR_P61_Card_Dialer_ANSI_Cards.pdf

71Feb BLR P61 Card Dialer ANSI Cards

Bell Labs Record.  The dialer shown is probably a F-58555. (Single line version was F-58554.) Contributed by Chuck Hensley.

pdf 59Jan BLR P23 PBX Crossbar Circuitry 756A Popular

424 downloads

Download (pdf, 1.52 MB)

59Jan_BLR_P23_PBX_Crossbar_Circuitry_756A.pdf

59Jan BLR P23 PBX Crossbar Circuitry 756A

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 63Nov BLR P374 101ESS Popular

454 downloads

Download (pdf, 2.01 MB)

63Nov_BLR_P374_101ESS.pdf

63Nov BLR P374 101ESS

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 66May BLR P159 Expanding 101ESS Popular

1215 downloads

Download (pdf, 1.71 MB)

66May_BLR_P159_Expanding_101ESS.pdf

66May BLR P159 Expanding 101ESS

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 68Aug BLR P238 Coin Level Detector Popular

385 downloads

Download (pdf, 562 KB)

68Aug_BLR_P238_Coin_Level_Detector.pdf

68Aug BLR P238 Coin Level Detector

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 68Nov BLR P346 Protection For Receivers 104A Varistor Popular

532 downloads

Download (pdf, 878 KB)

68Nov_BLR_P346_Protection_For_Receivers_104A_Varistor.pdf

68Nov BLR P346 Protection For Receivers 104A Varistor

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 68Oct BLR P283 Evolution Of PICTUREPHONE Popular

501 downloads

Download (pdf, 2.67 MB)

68Oct_BLR_P283_Evolution_Of_PICTUREPHONE.pdf

68Oct BLR P283 Evolution Of PICTUREPHONE

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 69Jul BLR P220 New Lightweight Receiver LB For Trimline Popular

460 downloads

Download (pdf, 294 KB)

69Jul_BLR_P220_New_Lightweight_Receiver_LB_for_Trimline.pdf

69Jul BLR P220 New Lightweight Receiver LB For Trimline

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 69Jun BLR P138 PICTUREPHONE Popular

481 downloads

Download (pdf, 1.47 MB)

69Jun_BLR_P138_PICTUREPHONE.pdf

69Jun BLR P138 PICTUREPHONE

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 69Jun BLR P143 PICTUREPHONE Picture Model II Popular

454 downloads

Download (pdf, 1.24 MB)

69Jun_BLR_P143_PICTUREPHONE_Picture_ModII.pdf

69Jun BLR P143 PICTUREPHONE Picture Model II

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 69Mar BLR P77 Metroliner Train Telephones Popular

892 downloads

Download (pdf, 2.81 MB)

69Mar_BLR_P77_Metroliner_Train_Telephones_tci_ocr.pdf

69Mar BLR P77 Metroliner Train Telephones

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 69Nov BLR P320 LED Telephone Lamps Popular

464 downloads

Download (pdf, 1.67 MB)

69Nov_BLR_P320_LED_Telephone_Lamps.pdf

69Nov BLR P320 LED Telephone Lamps

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 69Oct BLR P293 Dialtone First Popular

690 downloads

Download (pdf, 1.11 MB)

69Oct_BLR_P293_Dialtone_First.pdf

69Oct BLR P293 Dialtone First

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 69Sep BLR P280 Code-Com Telephone For Handicapped Popular

478 downloads

Download (pdf, 1.08 MB)

69Sep_BLR_P280_Code-Com_Telephone_For_Handicapped.pdf

69Sep BLR P280 Code-Com Telephone For Handicapped

And volume control (three steps) handset for coin phones.  Field trials.  Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 58Aug BLR P352 Bedroom Set Prototype Princess Popular

381 downloads

Download (pdf, 215 KB)

58Aug_BLR_P352_Bedroom_Set_Prototype_Princess.pdf

58Aug BLR P352 Bedroom Set Prototype Princess

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 58Mar BLR P81 6A KTS Popular

465 downloads

Download (pdf, 1.62 MB)

58Mar_BLR_P81_6A_KTS.pdf

58Mar BLR P81 6A KTS

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 59Dec BLR P464 Single Slot Coin Phone Trial Woodbridge Popular

445 downloads

Download (pdf, 1.37 MB)

59Dec_BLR_P464_Single_Slot_Coin_Phone_Trial_Woodbridge.pdf

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 67Apr BLR P122 Jacketed Station Wire Popular

1136 downloads

Download (pdf, 648 KB)

67Apr_BLR_P122_Jacketed_Station_Wire.pdf

67Apr BLR P122 Jacketed Station Wire

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 67Dec BLR P374 New Picturephone Model II Popular

405 downloads

Download (pdf, 1.01 MB)

67Dec_BLR_P374_New_Picturephone_Model_II.pdf

67Dec BLR P374 New Picturephone Model II

Bell Laboratories 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 894 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.