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 67Feb BLR P49 800A PBX Popular

525 downloads

Download (pdf, 1.66 MB)

67Feb_BLR_P49_800A_PBX.pdf

67Feb BLR P49 800A PBX

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 67Jun BLR P202 Experimental Lineless (Cordless) Telephone Popular

702 downloads

Download (pdf, 609 KB)

67Jun_BLR_P202_Lineless_Telephone.pdf

67Jun BLR P202 Experimental Lineless (Cordless) Telephone

Bell Laboratories Record.  Covers the development and plans for field trials of the cordless phone. Contributed by Chuck Hensley.

pdf 67May BLR P161 OSP Drop Closure Popular

452 downloads

Download (pdf, 395 KB)

67May_BLR_P161_OSP_Drop_Closure.pdf

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 68Apr BLR P130 Experimental Electronic Telephone Popular

397 downloads

Download (pdf, 415 KB)

68Apr_BLR_P130_Experimental_Electronic_Telephone.pdf

68Apr BLR P130 Experimental Electronic Telephone

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 68Feb BLR P40 Bell System History 1 Popular

395 downloads

Download (pdf, 2.57 MB)

68Feb_BLR_P40_Bell_System_History_1.pdf

68Feb BLR P40 Bell System History 1

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 68Jan BLR P9 60 Years Of PBX Development Popular

921 downloads

Download (pdf, 1.91 MB)

68Jan_BLR_P9_60Years_of_PBX.pdf

68Jan BLR P9 60 Years Of PBX Development

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 68Mar BLR P77 Bell System History 2 Popular

504 downloads

Download (pdf, 1.88 MB)

68Mar_BLR_P77_Bell_System_History_2.pdf

68Mar BLR P77 Bell System History 2

Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 57Sep BLR P348 500 Set Distinctive Ringing Popular

318 downloads

Download (pdf, 1.16 MB)

57Sep_BLR_P348_500_Set_Distinctive_Ringing.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 58Apr BLR P149 New Booth Popular

367 downloads

Download (pdf, 163 KB)

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

405 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 59Apr BLR P145 New Protector Popular

433 downloads

Download (pdf, 832 KB)

59Apr_BLR_P145_New_Protector.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 59Apr BLR P151 500 Set Design Honor Popular

364 downloads

Download (pdf, 142 KB)

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

415 downloads

Download (pdf, 181 KB)

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

336 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

345 downloads

Download (pdf, 453 KB)

59Aug_BLR_P313_Push_Button_500_Set_Dataphone_Card_Reader.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 59May BLR P187 Telephone Cords Popular

361 downloads

Download (pdf, 441 KB)

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

353 downloads

Download (pdf, 898 KB)

59Nov_BLR_P430_Coin_Disposal_Mechanism.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 60Dec BLR P470 All Number Calling Popular

475 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

337 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

377 downloads

Download (pdf, 745 KB)

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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