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 were available here:
  http://www.americanradiohistory.com/Bell_Laboratories_Record_Issue_Key.htm

Categories

Documents

pdf 55Feb BLR P70 Drop Wire Clamp Popular

By 165 downloads

Download (pdf, 496 KB)

55Feb_BLR_P70_Drop_Wire_Clamp.pdf

55Feb BLR P70 Drop Wire Clamp

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 55Oct BLR P361 Volume Control Telephone 532 151A Amp Popular

By 124 downloads

Download (pdf, 723 KB)

55Oct_BLR_p361_Volume_Control_Telephone_532_151A_amp.pdf

Bell Labs Record.  Contributed by Chuck Hensley.

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

By 184 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

By 377 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

By 328 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 P302 Small Dial PBX Attendant Popular

By 137 downloads

Download (pdf, 1.25 MB)

56Aug_BLR_P302_Small_Dial_PBX_Attendant.pdf

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 56Aug BLR P313 5300 Type Set Popular

By 112 downloads

Download (pdf, 224 KB)

56Aug_BLR_P313_5300_Type_Set.pdf

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 56Dec BLR P473 Drop Wire Cap Popular

By 100 downloads

Download (pdf, 211 KB)

56Dec_BLR_P473_Drop_Wire_Cap.pdf

56Dec BLR P473 Drop Wire Cap

Bell Labs Record. Contributed by Chuck Hensley.

pdf 56Jul BLR P252 Color Telephones 500 Type Popular

By 146 downloads

Download (pdf, 789 KB)

56Jul_BLR_P252_Color_Telephones_500_type.pdf

56Jul BLR P252 Color Telephones 500 Type

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 56Jun BLR P208 1A Speakerphone 592 Popular

By 120 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 56June BLR P201 Mechanized Memory Popular

By 115 downloads

Download (pdf, 1.49 MB)

56June_BLR_P201_Mechanized_Memory.pdf

56June BLR P201 Mechanized Memory

Bell Laboratories Record Magazine.  Contributed by Chuck Hensley

pdf 56Mar BLR P116 Tone Ringer Trial Popular

By 104 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

By 104 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 56Oct BLR P381 Military Telephone TA43PT Popular

By 263 downloads

Download (pdf, 1.62 MB)

56Oct_BLR_P381_Military_Telephone_TA43PT.pdf

56Oct BLR P381 Military Telephone TA43PT

Bell Labs Record. Contributed by Chuck Hensley.

pdf 56Sep BLR P334 Experimental Picturephone Popular

By 112 downloads

Download (pdf, 424 KB)

56Sep_BLR_P334_Experimental_Picturephone.pdf

56Sep BLR P334 Experimental Picturephone

Bell Labs Record. Contributed by Chuck Hensley.

pdf 57Dec BLR P485 Modern Crossbar PBX 756A Popular

By 214 downloads

Download (pdf, 801 KB)

57Dec_BLR_P485_Modern_Crossbar_PBX_756A.pdf

57Dec BLR P485 Modern Crossbar PBX 756A

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 57Feb BLR P48 Tone Ringer Popular

By 155 downloads

Download (pdf, 1.70 MB)

57Feb_BLR_P48_Tone_Ringer.pdf

57Feb BLR P48 Tone Ringer

Bell Laboratories Record, February 1957.  Field Trials in Americus, GA and Crystal Lake, IL. Contributed by Chuck Hensley.

pdf 57Jan BLR P15 Dial Testing Popular

By 149 downloads

Download (pdf, 1.00 MB)

57Jan_BLR_P15_Dial_Testing.pdf

57Jan BLR P15 Dial Testing

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 57Jan BLR P22 Testing Cords

By 85 downloads

Download (pdf, 848 KB)

57Jan_BLR_P22_Testing_Cords.pdf

57Jan BLR P22 Testing Cords

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 57Jan BLR P6 Answering Service Switchboards Popular

By 275 downloads

Download (pdf, 893 KB)

57Jan_BLR_P6_Answering_Service_Switchboards.pdf

57Jan BLR P6 Answering Service Switchboards

Bell Laboratories Record, January 1957.  557A (secretary and PBX) and 557B (answering service).  Contributed by Chuck Hensley.

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