Folder Publications and Educational Documents (by Date)

Organized by year of publication (if known).

Categories

Folder AT&T Radio Notes

AT&T Radio Notes

by the Operation and Engineering Department. Began around 1946.
Thanks to Terry Michaels for contributing 29 issues to get this section started. More issues are welcome.

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

Folder BSTJ - Bell System Technical Journal

In addition to individual scans posted here, see the index to the on-line BSTJ Archive ...

   Bell System Technical Journal Index with Links - 1922 - 1983

Documents

pdf 1946ca WE - Thermistors - Nov46ca Popular

By 1216 downloads

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1946ca_WE_Thermistors_Nov46ca_ocr_tci.pdf

1946ca WE - Thermistors - Nov46ca

Contributed by John Novack.

pdf 1948 NYC (New York City) Exchange Areas Popular

By 1761 downloads

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NYC Exchange Areas.pdf

1948 NYC (New York City) Exchange Areas

From Bell Telephone Magazine, Spring 1948. Contributed by Steve Cichorsky.

pdf 1955ca WE - How does it work? - Telephones - The WE500 Popular

By 1121 downloads

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1955ca_WE_How_does_it_work_WE500_ocr_tci.pdf

1955ca WE - How does it work? - Telephones - The WE500

Contributed by John Novack.

pdf 1977 021B Terminology - Bell System Training Popular

By 1712 downloads

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Terminology-A.pdf

1977 021B Terminology - Bell System Training

171 pages.? Provides a reference to common terms used in the 021 series of courses.? Marked for internal use within the Bell System.

Topics include: CO Equipment, Apparatus, Equipment, Cable & Wiring, Engineering Aids, References (e.g. Standards, Technical Design Manual, BSPs), and Ordering Apparatus.

pdf 2023 - WECo Forsberg Dial Genealogy - by Karl Brose Popular

By 282 downloads

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WECo_Forsberg_Dial_Genealogy_Karl_Brose_2023-06-25_tci.pdf

2023 - WECo Forsberg Dial Genealogy - by Karl Brose

Version 2023-06-25. This chart documents the history of Western Electric dial generations of the lineage started by Oscar Forsberg in 1915. It traces the history of apparatus codes through generations No. 1 to 6.  The apparatus codes also trace the application area of each dial type.
This is a work in progress, a snapshot, and will be updated as new information and documentation continues to emerge.

Created and contributed by Karl Brose.

This document is covered by Creative Commons Attribution-ShareAlike 4.0 International Public License. For details, click on the link in the lower right corner of the pdf.

Note: Prints best on 11x17" paper. Printing on 8.5x11" paper results in very small font size.
Most Windows print drivers allow "poster" printing on multiple 8.5x11" pages. For example, to print on two pages, which may be taped together:
    Select: Print / Paper Size & Handling / Poster / Tile Scale: 125% / Landscape

pdf 20apr Bell Tel News - Cleveland Tel - Vol IX Apr20 - Machine Switching Popular

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20apr_Bell_Tel_News_Cleveland_Tel_Vol-IX-Apr20_-_Machine_Switching_tci-ocr.pdf

20apr Bell Tel News - Cleveland Tel - Vol IX Apr20 - Machine Switching

Special issue. Interesting early perspective on the adoption of Machine Switching in the Bell System. Contributed by the Connections Museum. Processing by Remco Enthoven and Paul Fassbender.

pdf 20apr Bell Telephone News - Chicago TelCo - Machine Switching Ocr R Popular

By 2416 downloads

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20apr_Bell_Telephone_News_-_Chicago_TelCo_Machine_Switching_ocr_r.pdf

20apr Bell Telephone News - Chicago TelCo - Machine Switching Ocr R

April 1920. Chicago Telephone Company. Feature article on Machine Switching in the Bell System.  Contributed by Steve Cichorsky. OCR by Clint Gilliland.

pdf 22 WE Railroad Tel Selective Apparatus P38 Bells And Gongs Popular

By 1505 downloads

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22_WE_Railroad_Tel_Selective_Apparatus_p38_Bells and Gongs.pdf

22 WE Railroad Tel Selective Apparatus P38 Bells And Gongs

Extract showing the WE 392 ringer and gong shapes.  Contributed by Steve Cichorsky.

pdf 24feb PTM - Interest-desire-enthusiasm-action Ocr R Popular

By 1296 downloads

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interest-desire-enthusiasm-action_ptm_Feb_1924_ocr_r.pdf

24feb PTM - Interest-desire-enthusiasm-action  Ocr R

February 1924.  Machine dialing demonstrations and equipment.  Contributed by Steve Cichorsky.  OCR by Clint Gilliland.

pdf 26 WE Elements of Communication - RC Glasier - 1926 Popular

By 1342 downloads

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26_WE_Elements_of_Communication_RC-Glasier_1926_tci-ocr.pdf

26 WE Elements of Communication - RC Glasier - 1926

103 pages. Components, Calling, Machine Switching, SxS, Long Distance. Contributed by the Connections Museum. Processing by Remco Enthoven and Paul Fassbender.

pdf 32apr BSTJ - "Cohering" - Capacitors in Handsets Popular

By 1334 downloads

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Cohering__Capacitors_In_Handsets.pdf

32apr BSTJ - "Cohering" - Capacitors in Handsets

Extracts from the Bell System Technical Journal (April 1932) and several BSPs highlight reasons for adding capacitors to handsets.  BSPs referenced include C30.002, C32.203 and C32.275.  Contributed by Steve Cichorsky.

pdf 35feb Pacific Telephone Magazine Tci Ocr R Popular

By 1500 downloads

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35feb_Pacific_Telephone_Magazine_tci_ocr_r.pdf

35feb Pacific Telephone Magazine Tci Ocr R

Contributed by Steve Cichorsky.  OCR by Clint Gilliland.

pdf 38dec - 1938 Kearny Works Open House - Telephone Review Popular

By 2410 downloads

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38dec_Tel_Rev_WE_Kearny_Works_Open_House_tci_ocr.pdf

38dec - 1938 Kearny Works Open House - Telephone Review

"Thousands Visit Kearney's Wonder Workshop," Telephone Review, Dec 38, Starts on page 7.

pdf 38jan IndianaTelNews P5 Crossbar Switch For Dial Central Offices Popular

By 1256 downloads

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38jan_IndianaTelNews_p5_Crossbar_Switch_for_Dial_Central_Offices.pdf

38jan IndianaTelNews P5 Crossbar Switch For Dial Central Offices
Contributed by Steve Cichorsky.

pdf 38jan IndianaTelNews P7 Culver 740-AX PBX First Tel Exchange New Haven Popular

By 1428 downloads

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38jan_IndianaTelNews_p7_Culver_740-AX_PBX __First_Tel_Exchange_New_Haven.pdf

38jan IndianaTelNews P7 Culver 740-AX PBX   First Tel Exchange New Haven
Contributed by Steve Cichorsky.

pdf 39jul BTL Monograph B-1166 Cold-Cathode Gas-Filled Tubes Popular

By 1513 downloads

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39jul_BTL_Monograph_B-1166_Cold-Cathode_Gas-Filled_Tubes.pdf

pdf 39Mar BLR p212 - Molded Telephone Apparatus Design Popular

By 1091 downloads

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Molded Telephone Apparatus Design_BLR_3_39.pdf

39Mar BLR p212 - Molded Telephone Apparatus Design

"Grooved handset article" from Bell Laboratories Record March, 1939? Vol. XVII No. 7, by T S Huxman, Insulating Materials Development.

Contributed by Jim Stettler.

pdf 43dec Pacific Tel Magazine - Christmas - TCI Ocr Op R Popular

By 1340 downloads

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43dec_Pacific_Tel_Magazine_-_Christmas_-_TCI_ocr_op_r.pdf

43dec Pacific Tel Magazine - Christmas - TCI Ocr Op R

Contributed by Steve Cichorsky.  OCR by Clint Gilliland.

pdf 47may - 1947-1950 - 500 Telephone Pre-introduction Planning Memos Ocr Popular

By 1330 downloads

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500_Telephone_Pre-introduction_Planning_1947-50_ocr_tci.pdf

47may - 1947-1950 - 500 Telephone Pre-introduction Planning Memos Ocr

Several internal memos discussing transmission and zoning implications of the new 500-type sets.  Includes a mention of the 4,000 unit 1949 trial and projected production quantities for the 500B:  50Q2 - 23K, 50Q3 - 49K and 50Q4 - 49K; and for the 401B: 50Q4 - 20K.  Price for a 500B = $14.30.  Also see AB43.910  Contributed by Clint Gilliland.

pdf 47spring Telephone Pioneer Newsletter - George S Ladd Chapter PTT - AGB Issue Popular

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Telephone_Pioneer_Newsletter_George_S_Ladd_Chapter_PTT_Spring_1947_AG_Bell_Issue_ocr_tci.pdf

47spring Telephone Pioneer Newsletter - George S Ladd Chapter PTT - AGB Issue

51 pages. Alexander Graham Bell Commemorative issue. Contributed, scanned and bookmarked by Steve Cichorsky. OCR by John Novack.

New User?

Read the articles under "Introduction" in the black menu bar above.

Recent Contributors

Thanks for new documents from Bruce Patterson, Jon Kolger, Paul Ivester, Len Hicken, Paul Fassbender, Fred Haynes, Kurt Rudolph, Wade ("Kellogg KITT"), the Connections Museum, Rick Walsh, Jeff Lamb, Jeremy Walters, Mark Cuccia, Alan David, Harry Joseph, Charlie Terry, Karl Brose, Dennis Hock, Tim Griffin, Remco Enthoven, and Steve Cichorsky.

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