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 30jun BLR P418 Die Casting

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30jun_BLR_p418_Die_Casting.pdf

30jun BLR P418 Die Casting

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 30may BLR P416 Residence PBX - 740-C Popular

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30may_BLR_p416_Residence_PBX.pdf

Bell Labs Record.  740C PBX.  Contributed by Chuck Hensley. 

pdf 30may BLR P421 Telephone Booth Popular

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30may_BLR_p421_Telephone_Booth.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 31jun BLR P470 Insulating Material

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31jun_BLR_p470_Insulating_Material.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 31may BLR P426 Wear Test

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31may_BLR_p426_Wear_Test.pdf

31may BLR P426 Wear Test

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 31oct BLR P46 Hard of Hearing

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31oct_BLR_p46_Hard_Hearing.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 32apr BLR P275 Condenser

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32apr_BLR_p275_Condenser.pdf

32apr BLR P275 Condenser

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 32aug BLR P421 Inside Wire

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32aug_BLR_p421_Inside_Wire.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 32feb BLR P182 Operator Transmitter

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32feb_BLR_p182_Operator_Transmitter.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 32jul BLR P385 Station Ringer

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32jul_BLR_p385_Station_Ringer.pdf

32jul BLR P385 Station Ringer

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 32nov BLR P80 Prorector Block Popular

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32nov_BLR_p80_Prorector_Block.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 32sep BLR P15 Navy Dial

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32sep_BLR_p15_Navy_Dial.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 33apr BLR P244 15A and 23A Key Equipments, Residential, & E Handset Mounting

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33apr_BLR_p244_15A_23A_Key_Equip_Residental_E_Handset_Mounting.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 33jul BLR P330 Dial Stroboscope

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33jul_BLR_p330_Dial_Stroboscope.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 33Mar BLR P210 Large Establishment PBX - 702A Popular

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33Mar_BLR_P210_Large_Establishment_PBX.pdf

33Mar BLR P210 Large Establishment PBX - 702A

Bell Labs Record. Contributed by Chuck Hensley.

pdf 34jan BLR P160 Early Bells

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34jan_BLR_p160_Early_Bells.pdf

34jan BLR P160 Early Bells

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 34jul BLR P322 Early Handsets

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34jul_BLR_p322_Early_Handsets.pdf

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 34jul BLR P343 Jacks and Plugs for Portable Telephones Popular

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34jul_BLR_p343_Portable_Telephones.pdf

34jul BLR P343 Jacks and Plugs for Portable Telephones

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 34jun BLR P297 Telephone Explosive Atmosphere

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34jun_BLR_p297_Telephone_Explosive_Atmosphere.pdf

34jun BLR P297 Telephone Explosive Atmosphere

Bell Labs Record.  Contributed by Chuck Hensley. 

pdf 34sep BLR P25 Switchboard Cord

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34sep_BLR_p25_Switchboard_Cord.pdf

34sep BLR P25 Switchboard Cord

Bell Labs Record.  Contributed by Chuck Hensley. 

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