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 43feb BLR P168 Operator Ad Popular

421 downloads

Download (pdf, 223 KB)

43feb_BLR_p168_Operator_Ad.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 43jan BLR P113 Telephone Booth Popular

472 downloads

Download (pdf, 672 KB)

43jan_BLR_p113_Telephone_Booth.pdf

43jan BLR P113 Telephone Booth

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 43nov BLR P115 - Steel Handset Parts Popular

422 downloads

Download (pdf, 686 KB)

43nov_BLR_p115_Steel_Handset_Parts.pdf

43nov BLR P115 - Steel Handset Parts

WWII. Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 44apr BLR P371 Noisy Locations Telephone Popular

421 downloads

Download (pdf, 690 KB)

44apr_BLR_p371_Noisy_Locations_Telephone.pdf

44apr BLR P371 Noisy Locations Telephone

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 44aug BLR P491 Material Replacements Popular

444 downloads

Download (pdf, 194 KB)

44aug_BLR_p491_Material_Replacements.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 44jan BLR P214 Substitute Materials Booths Popular

531 downloads

Download (pdf, 746 KB)

44jan_BLR_p214_Substitute_Materials_Booths.pdf

44jan BLR P214 Substitute Materials Booths

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 44jul BLR P476 Coin Shelves Popular

502 downloads

Download (pdf, 662 KB)

44jul_BLR_p476_Coin_Shelves.pdf

44jul BLR P476 Coin Shelves

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 47oct BLR P375 81A Toner Popular

532 downloads

Download (pdf, 603 KB)

47oct_BLR_p375_81A_Toner.pdf

47oct BLR P375 81A Toner

Shown in transparent case. Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 49Apr BLR P125 555 PBX Popular

862 downloads

Download (pdf, 706 KB)

49Apr_BLR_p125_555_PBX.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 49Jan BLR P43 Color 300 Series Sets Popular

560 downloads

Download (pdf, 237 KB)

49Jan_BLR_p43_Color_300_Series_Sets.pdf

49Jan BLR P43 Color 300 Series Sets

Bell Labs Record.  Colored Telephone Sets. Announces resumed (after WWII) production of colored, molded plastic 300-type sets in ivory (first), followed by old rose, gray-green, dark blue and Pekin red.  Metallic colors to be applied in WE distributing house shops. Contributed by Chuck Hensley. 

pdf 49May BLR P165 New 500 Popular

451 downloads

Download (pdf, 763 KB)

49May_BLR_p165_New_500.pdf

49May BLR P165 New 500

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 43-45 BLR - Crossbar Toll Reprint Popular

791 downloads

Download (pdf, 14.06 MB)

43_BLR_Reprint_Crossbar_Toll_tci.pdf

43-45 BLR - Crossbar Toll Reprint

71 pages, 15 articles from Bell Labs Record issues, vol. 22-23, November 1943 thru October 1945, related to Crossbar Switching, multi-frequency pulsing and operator toll dialing.  OCR by Clint Gilliland. Bookmarks by Paul Fassbender.

pdf 41apr BLR p234 Remote Control For Reversible Program Circuits Popular

691 downloads

Download (pdf, 5.82 MB)

41apr_BLR_p234_Remote_Control_for_Reversible_Program_Circuits.pdf

41apr BLR p234 Remote Control For Reversible Program Circuits

April 1941 Bell Labs Record.

pdf 40aug BLR p369 321A Loudspeaking Tel Set and 2A Key Tel System Popular

726 downloads

Download (pdf, 6.73 MB)

40aug_BLR_p369_2A_Key_Tel_Sys_and_321_Loudspeaking_Tel_Set_A4.pdf

40aug BLR p369 321A Loudspeaking Tel Set and 2A Key Tel System

August 1941 Bell Labs Record.  Contributed by Steve Cichorsky.

pdf 41apr BLR National Defense And The Bell System Popular

806 downloads

Download (pdf, 26.92 MB)

41apr_BLR_National_Defense_and_the_Bell_System.pdf

41apr BLR National Defense And The Bell System

April 1941 Bell Labs Record.  Contributed by Steve Cichorsky.

pdf 41apr BLR "No Such Number: Tone for Dial Systems" Popular

1247 downloads

Download (pdf, 2.24 MB)

41apr_BLR_No_Such_Number_Tone_for_Dial_Systems.pdf

41apr BLR "No Such Number: Tone for Dial Systems"

April 1941 Bell Labs Record. Contributed by Steve Cichorsky

pdf 74dec BLR P361 - DUE - Detection of Unauthorized Equipment - BLR Popular

1090 downloads

Download (pdf, 479 KB)

74dec_BLR_P361_DUE_Detection_Of_Unauthorized_Equip.pdf

74dec BLR P361 - DUE - Detection of Unauthorized Equipment - BLR

December 1974 Bell Labs Record. "Unauthorized Phones Get Their Due"

pdf 70Oct BLR P259 - Advances in the 1A2 Key Telephone System Popular

1394 downloads

Download (pdf, 6.21 MB)

1A2 Advances - BLR 1970.pdf

70Oct BLR P259 - Advances in the 1A2 Key Telephone System

6.2MB. Oct 70, Bell Labs Record, Pages 259-263 plus cover. No OCR.

pdf 66mar BLR - 1A2 Key Telephone System Popular

1785 downloads

Download (pdf, 3.44 MB)

1A2 KTS - BLR 1966.pdf

66mar BLR -  1A2 Key Telephone System

Mar 1966, Bell Labs Review, Pages 85-88. "Key Telephone System: The Latest Chapter"

pdf 74nov BLR - p302 812A PBX Popular

1402 downloads

Download (pdf, 9.28 MB)

812A PBX (complete).pdf

74nov BLR - p302 812A PBX

November 1974 Bell Labs Record. Not OCRed.

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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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