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 38aug BLR P391 Station Cord Popular

600 downloads

Download (pdf, 1.20 MB)

38aug_BLR_p391_Station_Cord.pdf

38aug BLR P391 Station Cord

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 38jun BLR P336 755PBX Popular

777 downloads

Download (pdf, 1.40 MB)

38jun_BLR_p336_755PBX.pdf

38jun BLR P336 755PBX

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 38oct BLR P52 Enamel Number Plate Popular

608 downloads

Download (pdf, 1.13 MB)

38oct_BLR_p52_Enamel_Number_Plate.pdf

38oct BLR P52 Enamel Number Plate

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 38sep BLR P11 Operator Mouthpiece Popular

644 downloads

Download (pdf, 194 KB)

38sep_BLR_p11_Operator_Mouthpiece.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 39dec BLR P97 Lucite Handset Popular

634 downloads

Download (pdf, 122 KB)

39dec_BLR_p97_Lucite_Handset.pdf

39dec BLR P97 Lucite Handset

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 39jul BLR P347 Antisidetone Circuit Popular

1936 downloads

Download (pdf, 819 KB)

39jul_BLR_p347_Antisidetone_Circuit.pdf

39jul BLR P347 Antisidetone Circuit

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 39mar BLR P212 Molded Design F Handset Popular

722 downloads

Download (pdf, 987 KB)

39mar_BLR_p212_Molded_Design_F_Handset.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 39mar BLR P230 Wire Toner Popular

642 downloads

Download (pdf, 185 KB)

39mar_BLR_p230_Wire_Toner.pdf

39mar BLR P230 Wire Toner

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 40jul BLR P332 Drop Wire Popular

443 downloads

Download (pdf, 1007 KB)

40jul_BLR_p332_Drop_Wire.pdf

40jul BLR P332 Drop Wire

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 40jul BLR P342 Sound Tests of Dials and Ringers Popular

458 downloads

Download (pdf, 467 KB)

40jul_BLR_p342_Sound_Tests_of_Dials_and_Ringers.pdf

40jul BLR P342 Sound Tests of Dials and Ringers

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 40jun BLR P315 1A Key Telephone System Popular

565 downloads

Download (pdf, 1.25 MB)

40jun_BLR_p315_1A_Key.pdf

40jun BLR P315 1A Key Telephone System

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 40oct BLR P41 Telephone Explosive Atmosphere 320 Popular

428 downloads

Download (pdf, 711 KB)

40oct_BLR_p41_Telephone_Explosive_Atmosphere_320.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 41aug BLR P380 Telephone Cords Popular

466 downloads

Download (pdf, 620 KB)

41aug_BLR_p380_Telephone_Cords.pdf

41aug BLR P380 Telephone Cords

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 41dec BLR P106 Station Keys Popular

418 downloads

Download (pdf, 1.42 MB)

41dec_BLR_p106_Station_Keys.pdf

41dec BLR P106 Station Keys

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 41nov BLR P76 Lineman Handset Popular

523 downloads

Download (pdf, 279 KB)

41nov_BLR_p76_Lineman_Handset.pdf

41nov BLR P76 Lineman Handset

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 41nov BLR P77 Repairman's Test Set ''Pin'' Dial Popular

532 downloads

Download (pdf, 303 KB)

41nov_BLR_p77_Buttin_Dial.pdf

41nov BLR P77 Repairman's Test Set ''Pin'' Dial

Description of the 103A dial created for use in the 1011 test set. Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 41oct BLR P34 Coin Collector Popular

490 downloads

Download (pdf, 644 KB)

41oct_BLR_p34_Coin_Collector.pdf

41oct BLR P34 Coin Collector

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 42aug BLR P295 Telephone Cords Popular

451 downloads

Download (pdf, 1.04 MB)

42aug_BLR_p295_Telephone_Cords.pdf

42aug BLR P295 Telephone Cords

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 42mar BLR P178 300G Outdoor Set Popular

519 downloads

Download (pdf, 671 KB)

42mar_BLR_p178_300G_Outdoor_Set.pdf

42mar BLR P178 300G Outdoor Set

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 42oct BLR P45 Hard of Hearing - 332 set Popular

489 downloads

Download (pdf, 748 KB)

42oct_BLR_p45_Hard_Hearing.pdf

42oct BLR P45 Hard of Hearing - 332 set

Bell Labs Record.  Contributed by Chuck Hensley. 

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