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 71Apr BLR P127 PICTUREPHONE For Business 850A PBX Popular

518 downloads

Download (pdf, 804 KB)

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 71Feb BLR P61 Card Dialer ANSI Cards Popular

585 downloads

Download (pdf, 268 KB)

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 59Jan BLR P23 PBX Crossbar Circuitry 756A Popular

380 downloads

Download (pdf, 1.52 MB)

59Jan_BLR_P23_PBX_Crossbar_Circuitry_756A.pdf

59Jan BLR P23 PBX Crossbar Circuitry 756A

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 63Nov BLR P374 101ESS Popular

430 downloads

Download (pdf, 2.01 MB)

63Nov_BLR_P374_101ESS.pdf

63Nov BLR P374 101ESS

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 66May BLR P159 Expanding 101ESS Popular

1099 downloads

Download (pdf, 1.71 MB)

66May_BLR_P159_Expanding_101ESS.pdf

66May BLR P159 Expanding 101ESS

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 68Aug BLR P238 Coin Level Detector Popular

364 downloads

Download (pdf, 562 KB)

68Aug_BLR_P238_Coin_Level_Detector.pdf

68Aug BLR P238 Coin Level Detector

Bell Laboratories Record.  Contributed by Chuck Hensley.

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

492 downloads

Download (pdf, 878 KB)

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

457 downloads

Download (pdf, 2.67 MB)

68Oct_BLR_P283_Evolution_Of_PICTUREPHONE.pdf

68Oct BLR P283 Evolution Of PICTUREPHONE

Bell Laboratories Record.  Contributed by Chuck Hensley.

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

433 downloads

Download (pdf, 294 KB)

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

443 downloads

Download (pdf, 1.47 MB)

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

413 downloads

Download (pdf, 1.24 MB)

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

816 downloads

Download (pdf, 2.81 MB)

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

426 downloads

Download (pdf, 1.67 MB)

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

612 downloads

Download (pdf, 1.11 MB)

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

432 downloads

Download (pdf, 1.08 MB)

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 58Aug BLR P352 Bedroom Set Prototype Princess Popular

362 downloads

Download (pdf, 215 KB)

58Aug_BLR_P352_Bedroom_Set_Prototype_Princess.pdf

58Aug BLR P352 Bedroom Set Prototype Princess

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 58Mar BLR P81 6A KTS Popular

446 downloads

Download (pdf, 1.62 MB)

58Mar_BLR_P81_6A_KTS.pdf

58Mar BLR P81 6A KTS

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 59Dec BLR P464 Single Slot Coin Phone Trial Woodbridge Popular

396 downloads

Download (pdf, 1.37 MB)

59Dec_BLR_P464_Single_Slot_Coin_Phone_Trial_Woodbridge.pdf

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 67Apr BLR P122 Jacketed Station Wire Popular

1009 downloads

Download (pdf, 648 KB)

67Apr_BLR_P122_Jacketed_Station_Wire.pdf

67Apr BLR P122 Jacketed Station Wire

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 67Dec BLR P374 New Picturephone Model II Popular

380 downloads

Download (pdf, 1.01 MB)

67Dec_BLR_P374_New_Picturephone_Model_II.pdf

67Dec BLR P374 New Picturephone Model II

Bell Laboratories Record.  Contributed by Chuck Hensley.

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