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 32sep BLR P15 Navy Dial Popular

623 downloads

Download (pdf, 395 KB)

32sep_BLR_p15_Navy_Dial.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 33apr BLR P244 15A and 23A Key Equipments, Residential, & E Handset Mounting Popular

637 downloads

Download (pdf, 436 KB)

33apr_BLR_p244_15A_23A_Key_Equip_Residental_E_Handset_Mounting.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 33jul BLR P330 Dial Stroboscope Popular

595 downloads

Download (pdf, 1.04 MB)

33jul_BLR_p330_Dial_Stroboscope_tci_ocr.pdf

33jul BLR P330 Dial Stroboscope

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 34jan BLR P160 Early Bells Popular

698 downloads

Download (pdf, 159 KB)

34jan_BLR_p160_Early_Bells.pdf

34jan BLR P160 Early Bells

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 34jul BLR P322 - Early Handsets Popular

903 downloads

Download (pdf, 973 KB)

34jul_BLR_p322_Early_Handsets.pdf

34jul BLR P322 - Early Handsets

Bell Labs Record. By H. A. FREDERICK, Transmission Instruments Director. Contributed by Chuck Hensley. 

pdf 34jul BLR P343 Jacks and Plugs for Portable Telephones Popular

673 downloads

Download (pdf, 1.16 MB)

34jul_BLR_p343_Portable_Telephones.pdf

34jul BLR P343 Jacks and Plugs for Portable Telephones

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 34jun BLR P297 Telephone Explosive Atmosphere Popular

554 downloads

Download (pdf, 1.15 MB)

34jun_BLR_p297_Telephone_Explosive_Atmosphere.pdf

34jun BLR P297 Telephone Explosive Atmosphere

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 34sep BLR P25 Switchboard Cord Popular

685 downloads

Download (pdf, 1014 KB)

34sep_BLR_p25_Switchboard_Cord.pdf

34sep BLR P25 Switchboard Cord

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 35may BLR P265 Outdoor Telephone 300 Type Popular

682 downloads

Download (pdf, 592 KB)

35may_BLR_p265_Outdoor_Telephone_300_Type.pdf

35may BLR P265 Outdoor Telephone 300 Type

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 35nov BLR P81 Flat Inside Wire Popular

625 downloads

Download (pdf, 169 KB)

35nov_BLR_p81_Flat_Inside_Wire.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 36aug BLR P381 Artificial Mouth Popular

621 downloads

Download (pdf, 155 KB)

36aug_BLR_p381_Artificial_Mouth.pdf

36aug BLR P381 Artificial Mouth

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 36aug BLR P399 Station Protector Popular

607 downloads

Download (pdf, 242 KB)

36aug_BLR_p399_Station_Protector.pdf

36aug BLR P399 Station Protector

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 36dec BLR P111 Selective Ringing Popular

772 downloads

Download (pdf, 1.06 MB)

36dec_BLR_p111_Selective_Ringing.pdf

36dec BLR P111 Selective Ringing

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 36jul BLR P359 300 Set Trial Popular

804 downloads

Download (pdf, 140 KB)

36jul_BLR_p359_300_Set_Trial.pdf

36jul BLR P359 300 Set Trial

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 36may BLR P297 Larger Telephone Booth Popular

644 downloads

Download (pdf, 323 KB)

36may_BLR_p297_Larger_Telephone_Booth.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 36may BLR P312 Telephone - Conference Aid Popular

653 downloads

Download (pdf, 1.52 MB)

36may_BLR_p312_Telephone_Conference.pdf

36may BLR P312 Telephone - Conference Aid

100-type loud speaker set, 1933, monitor speaker (early "Spokesman").  Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 36sep BLR P21 Hand Tools Popular

702 downloads

Download (pdf, 727 KB)

36sep_BLR_p21_Hand_Tools.pdf

36sep BLR P21 Hand Tools

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 37aug BLR P370 101-type Key Equipments Popular

741 downloads

Download (pdf, 1.74 MB)

37aug_BLR_p370_101_Key.pdf

37aug BLR P370 101-type Key Equipments

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 37feb BLR P190 Ringer Remagnitizer Popular

761 downloads

Download (pdf, 1003 KB)

37feb_BLR_p190_Ringer_Remagnitizer.pdf

37feb BLR P190 Ringer Remagnitizer

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 38apr BLR P282 Magnetic Telephone Popular

620 downloads

Download (pdf, 495 KB)

38apr_BLR_p282_Magnetic_Telephone.pdf

38apr BLR P282 Magnetic Telephone

Bell Labs Record.  Contributed by Chuck Hensley. 

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