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 were available here:
  http://www.americanradiohistory.com/Bell_Laboratories_Record_Issue_Key.htm

Categories

Documents

pdf 43jan BLR P113 Telephone Booth

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43jan_BLR_p113_Telephone_Booth.pdf

43jan BLR P113 Telephone Booth

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 43nov BLR P115 Steel Handset Parts

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43nov_BLR_p115_Steel_Handset_Parts.pdf

43nov BLR P115 Steel Handset Parts

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 44 Crossbar Toll Reprint BLR 1944 Ocr R Popular

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44_BLR_Reprint_Crossbar_Toll_ocr_r.pdf

44 Crossbar Toll Reprint BLR 1944 Ocr R

Articles from November 1943 thru October 1945 Bell Labs Record issues related to Crossbar Switching.  OCR by Clint Gilliland.

pdf 44apr BLR P371 Noisy Locations Telephone

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44apr_BLR_p371_Noisy_Locations_Telephone.pdf

44apr BLR P371 Noisy Locations Telephone

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 44aug BLR P491 Material Replacements

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44aug_BLR_p491_Material_Replacements.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 44jan BLR P214 Substitute Materials Booths Popular

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44jan_BLR_p214_Substitute_Materials_Booths.pdf

44jan BLR P214 Substitute Materials Booths

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 44jul BLR P476 Coin Shelves

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44jul_BLR_p476_Coin_Shelves.pdf

44jul BLR P476 Coin Shelves

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 47oct BLR P375 81A Toner Popular

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47oct_BLR_p375_81A_Toner.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 49Apr BLR P125 555 PBX Popular

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49Apr_BLR_p125_555_PBX.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 49Jan BLR P43 Color 300 Series Sets Popular

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49Jan_BLR_p43_Color_300_Series_Sets.pdf

49Jan BLR P43 Color 300 Series Sets

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 49May BLR P165 New 500 Popular

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49May_BLR_p165_New_500.pdf

49May BLR P165 New 500

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 50Feb BLR Cover 500Set

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50Feb_BLR_cover_500Set.pdf

50Feb BLR Cover 500Set

Contributed by Chuck Hensley.

pdf 50May BLR Cover Drop Test

By 90 downloads

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50May_BLR_cover_Drop_Test.pdf

50May BLR Cover Drop Test

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 51Dec BLR P545 Adjusting C Ringer

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51Dec_BLR_p545_Adjusting_C_Ringer.pdf

51Dec BLR P545 Adjusting C Ringer

Contributed by Chuck Hensley.

pdf 51Jan BLR P32 WECo Indianapolis Popular

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51Jan_BLR_p32_WECo_Indianapolis.pdf

Contributed by Chuck Hensley.

pdf 51Mar BLR P115 - W-R-J-M Ocr Popular

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51Mar_BLR_P115_W-R-J-M_ocr.pdf

51Mar BLR P115 - W-R-J-M Ocr

Standardized letters for party lines with two- and four-party service.  Bell Laboratories Record.  Contributed by Chuck Hensley.

pdf 51Nov BLR P511 500 Transmission 425A Network Popular

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51Nov_BLR_p511_500_Transmission_425A_Network.pdf

51Nov BLR P511 500 Transmission 425A Network

Contributed by Chuck Hensley.

pdf 51Oct BLR P460 740E PBX Popular

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51Oct_BLR_P460_740E_PBX_2.pdf

51Oct BLR P460 740E PBX

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 51Oct BLR P471 500 Ringer C-type Popular

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51Oct_BLR_p471_500_Ringer_C-type.pdf

51Oct BLR P471 500 Ringer C-type

Contributed by Chuck Hensley.

pdf 51Sep BLR P414 500 Set Tuffnell Popular

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51Sep_BLR_p414_500_Set_Tuffnell.pdf

Contributed by Chuck Hensley.

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Recent Contributors

Thanks for new documents from Chuck Hensley, John Gilbert, Chuck Batson, Alan David, Steve Flocke, Paul Wills, Dave Gruger, Jim Prather, John Stancliff, Sam Etler, John Novack, Clint Gilliland, Steve Cichorsky and Paul Fassbender.

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