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 57Jan BLR P6 Answering Service Switchboards Popular

By 933 downloads

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57Jan_BLR_P6_Answering_Service_Switchboards.pdf

57Jan BLR P6 Answering Service Switchboards

Bell Laboratories Record, January 1957.  557A (secretary and PBX) and 557B (answering service).  Contributed by Chuck Hensley.

pdf 57Jun BLR P219 Operator Chairs Popular

By 632 downloads

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57Jun_BLR_P219_Operator_Chairs.pdf

57Jun BLR P219 Operator Chairs

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 57Jun BLR P231 Experimental Drive In Payphone Popular

By 396 downloads

Download (pdf, 281 KB)

57Jun_BLR_P231_Experimental_Drive_in_Payphone.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 57Sep BLR P348 500 Set Distinctive Ringing Popular

By 320 downloads

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57Sep_BLR_P348_500_Set_Distinctive_Ringing.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 58Apr BLR P149 New Booth Popular

By 369 downloads

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58Apr_BLR_P149_New_Booth.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 58Aug BLR P308 New Station Apparatus Tests: Single Slot Payphone & Repertory Dialer Popular

By 407 downloads

Download (pdf, 1.26 MB)

58Aug_BLR_P308_New_Station_Apparatus_Single_SlotCoin_Reperatory_Dialer.pdf

58Aug BLR P308 New Station Apparatus Tests: Single Slot Payphone & Repertory Dialer

Dialer capacity is 50 thirteen-digit numbers on dotched circular discs.  Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 58Aug BLR P352 Bedroom Set Prototype Princess Popular

By 381 downloads

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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

By 467 downloads

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58Mar_BLR_P81_6A_KTS.pdf

58Mar BLR P81 6A KTS

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 59Apr BLR P145 New Protector Popular

By 438 downloads

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59Apr_BLR_P145_New_Protector.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 59Apr BLR P151 500 Set Design Honor Popular

By 366 downloads

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59Apr_BLR_P151_500_Set_Design_Honor.pdf

59Apr BLR P151 500 Set Design Honor

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 59Aug BLR Cover Push Button Telephone Popular

By 417 downloads

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59Aug_BLR_Cover_Push_Button_Telephone.pdf

59Aug BLR Cover Push Button Telephone

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 59aug BLR P313 Experimental Pushbutton Set Popular

By 338 downloads

Download (pdf, 592 KB)

59aug_BLR_p313_Experimental_Pushbutton_Set.pdf

59aug BLR P313 Experimental Pushbutton Set

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 59Aug BLR P313 Push Button 500 Set Dataphone Card Reader Popular

By 347 downloads

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59Aug_BLR_P313_Push_Button_500_Set_Dataphone_Card_Reader.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

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

By 447 downloads

Download (pdf, 1.37 MB)

59Dec_BLR_P464_Single_Slot_Coin_Phone_Trial_Woodbridge.pdf

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 59Jan BLR P23 PBX Crossbar Circuitry 756A Popular

By 426 downloads

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59Jan_BLR_P23_PBX_Crossbar_Circuitry_756A.pdf

59Jan BLR P23 PBX Crossbar Circuitry 756A

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 59May BLR P187 Telephone Cords Popular

By 361 downloads

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59May_BLR_P187_Telephone_Cords.pdf

59May BLR P187 Telephone Cords

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 59Nov BLR P430 Coin Disposal Mechanism Popular

By 355 downloads

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59Nov_BLR_P430_Coin_Disposal_Mechanism.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 60Dec BLR P470 All Number Calling Popular

By 477 downloads

Download (pdf, 864 KB)

60Dec_BLR_P470_All_Number_Calling.pdf

60Dec BLR P470 All Number Calling

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 60Feb BLR P71 WECo Production 1959 Popular

By 338 downloads

Download (pdf, 235 KB)

60Feb_BLR_P71_WECo_Production_1959.pdf

60Feb BLR P71 WECo Production 1959

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 60Jan BLR P23 Experimental Dial In Handset Phone Popular

By 379 downloads

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60Jan_BLR_P23_Experimental_Dial_in_Handset_phone.pdf

60Jan BLR P23 Experimental Dial In Handset Phone

Bell Laboratories Record. Contributed by Chuck Hensley.

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