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 68Mar BLR P77 Bell System History 2 Popular

By 522 downloads

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68Mar_BLR_P77_Bell_System_History_2.pdf

68Mar BLR P77 Bell System History 2

Bell Laboratories Record.  Contributed by Chuck Hensley.

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

By 557 downloads

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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

By 518 downloads

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68Oct_BLR_P283_Evolution_Of_PICTUREPHONE.pdf

68Oct BLR P283 Evolution Of PICTUREPHONE

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 69Feb BLR P44 - Bell Laboratories Material Research Popular

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69Feb_BLR_P44_Bell_Laboratories_Material_Research_TCI.pdf

69Feb BLR P44 - Bell Laboratories Material Research

Contributed by Chuck Hensley.

pdf 69Jan BLR P3 Role of Research Popular

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69Jan_BLR_P3_Role_of_Research_tci.pdf

69Jan BLR P3 Role of Research

Contributed by Chuck Hensley.

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

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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

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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

By 474 downloads

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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

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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

By 488 downloads

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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

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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

By 489 downloads

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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 70Aug BLR P195 Data Communications Popular

By 594 downloads

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70Aug_BLR_P195_Data_Communications.pdf

70Aug BLR P195 Data Communications

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 70Dec BLR P318 - A Decade Of ESS Popular

By 1008 downloads

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70Dec_BLR_P318_Decade_of_ESS_AUTOVON.pdf

70Dec BLR P318 - A Decade Of ESS

Bell Labs Record.  Includes AUTOVON.  Contributed by Chuck Hensley.

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

By 1517 downloads

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

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70Oct_BLR_P259_1A2_Key_Advances.pdf

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

1.4MB. Bell Labs Record.  OCR.  Contributed by Chuck Hensley.

pdf 71Apr BLR P127 PICTUREPHONE For Business 850A PBX Popular

By 574 downloads

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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 71Aug BLR P226 Improved Speakerphone Will Become 4A In 1974 Popular

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71Aug_BLR_P226_Improved_Speakerphone_will_become_4A_in_1974.pdf

71Aug BLR P226 Improved Speakerphone Will Become 4A In 1974

Bell Labs Record. Contributed by Chuck Hensley.

pdf 71Feb BLR P61 Card Dialer ANSI Cards Popular

By 627 downloads

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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 71Jan BLR P22 558A PBX Popular

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71Jan_BLR_P22_558A_PBX.pdf

71Jan BLR P22 558A PBX

Bell Labs Record.  Contributed by Chuck Hensley.

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