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

467 downloads

Download (pdf, 394 KB)

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 71Oct BLR P270 PICTUREPHONE Key Systems Popular

519 downloads

Download (pdf, 2.24 MB)

71Oct_BLR_P270_PICTUREPHONE_Key_Systems.pdf

71Oct BLR P270 PICTUREPHONE Key Systems

Bell Labs Record. Contributed by Chuck Hensley.

pdf 71Oct BLR P293 Operator Chairs Popular

489 downloads

Download (pdf, 287 KB)

71Oct_BLR_P293_Operator_Chairs.pdf

71Oct BLR P293 Operator Chairs

Bell Labs Record. Contributed by Chuck Hensley.

pdf 71Sep BLR P231 Switching for Multilocation Customers Popular

573 downloads

Download (pdf, 1.78 MB)

71Sep_BLR_P231_Multilocation_Customers.pdf

71Sep BLR P231 Switching for Multilocation Customers

Bell Labs Record. Contributed by Chuck Hensley.

pdf 72Apr BLR P110 Helping Handicapped Dial Payphones Popular

460 downloads

Download (pdf, 707 KB)

72Apr_BLR_P110_Helping_Handicapped_Dial.pdf

72Apr BLR P110 Helping Handicapped Dial Payphones

Bell Labs Record. Contributed by Chuck Hensley.

pdf 72Aug BLR P217 Customer Premises Connective System Popular

515 downloads

Download (pdf, 1.08 MB)

72Aug_BLR_P217_Customer_Premises_Connective_System.pdf

72Aug BLR P217 Customer Premises Connective System

Bell Labs Record. Contributed by Chuck Hensley.

pdf 72Jul BLR P167 Public Coin Telephone Enclosures Popular

553 downloads

Download (pdf, 2.89 MB)

72Jul_BLR_P167_Public_Telephone_Enclosures.pdf

72Jul BLR P167 Public Coin Telephone Enclosures

Bell Labs Record. Contributed by Chuck Hensley.

pdf 72May BLR P134 801A Midi PBX Popular

743 downloads

Download (pdf, 1.79 MB)

72May_BLR_P134_801A_Midi_PBX.pdf

72May BLR P134 801A Midi PBX

Bell Labs Record. Contributed by Chuck Hensley.

pdf 72May BLR P140 New Telephone Headsets 60A 61A Popular

543 downloads

Download (pdf, 746 KB)

72May_BLR_P140_New_Telephone_Headsets_60A_61A.pdf

Bell Labs Record. Contributed by Chuck Hensley.

pdf 72Sep BLR P249 Checkless Society Telephones Card Dialer Popular

523 downloads

Download (pdf, 1.34 MB)

72Sep_BLR_P249_Checkless_Society_Telephones_Card_Dialer.pdf

72Sep BLR P249 Checkless Society Telephones Card Dialer

Bell Labs Record. Contributed by Chuck Hensley.

pdf 72Sep BLR P266 Vandal Resistant Payphone Mount Popular

467 downloads

Download (pdf, 797 KB)

72Sep_BLR_P266_Vandal_Resistant_Payphone_Mount.pdf

72Sep BLR P266 Vandal Resistant Payphone Mount

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Dec BLR P353 PICTUREPHONE Big Picture Popular

567 downloads

Download (pdf, 1.96 MB)

73Dec_BLR_P353_PICTUREPHONE_Big_Picture.pdf

73Dec BLR P353 PICTUREPHONE Big Picture

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Jan BLR P9 Key Telephone 4A Call Distributor Popular

639 downloads

Download (pdf, 1.44 MB)

73Jan_BLR_P9_Key_Telephone_4A_Call_Distributor.pdf

73Jan BLR P9 Key Telephone 4A Call Distributor

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Jun BLR P187 Payphone Sentry Mounts Popular

504 downloads

Download (pdf, 334 KB)

73Jun_BLR_P187_Payphone_Sentry_Mounts.pdf

73Jun BLR P187 Payphone Sentry Mounts

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Mar BLR P94 TouchTone Dial Foil Popular

480 downloads

Download (pdf, 815 KB)

73Mar_BLR_P94_TouchTone_Dial_Foil.pdf

73Mar BLR P94 TouchTone Dial Foil

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73May BLR P158 TOUCH A MATIC 32 - Dialer Keyset 2872 Popular

899 downloads

Download (pdf, 336 KB)

73May_BLR_P158_TOUCH_A_MATIC_Keyset_2872.pdf

73May BLR P158 TOUCH A MATIC 32 - Dialer Keyset 2872

Bell Labs Record. Touch-a-matic 32. Contributed by Chuck Hensley.

pdf 73May BLR P136 805A PBX Popular

1338 downloads

Download (pdf, 1.85 MB)

73May_BLR_P136_805A_PBX.pdf

73May BLR P136 805A PBX

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Oct BLR P273 Handicapped Voice Dialing Popular

594 downloads

Download (pdf, 1.70 MB)

73Oct_BLR_P273_Handicapped_Voice_Dialing.pdf

73Oct BLR P273 Handicapped Voice Dialing

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Sep BLR P233 4A Speakerphone Popular

1261 downloads

Download (pdf, 1.21 MB)

73Sep_BLR_P233_4A_Speakerphone.pdf

73Sep BLR P233 4A Speakerphone

Bell Labs Record. Contributed by Chuck Hensley.

pdf 74Dec BLR P358 Credit Authorization Transaction Telephone Popular

609 downloads

Download (pdf, 917 KB)

74Dec_BLR_P358_Credit_Authorization_Transaction_Telephone.pdf

74Dec BLR P358 Credit Authorization Transaction Telephone

Bell Labs Record. Contributed by Chuck Hensley.

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