Edison screw (English Wikipedia)

Historical American standards:
- ASME 1474(1915), ASA C44-1931: "10". American national rolled threads for screw shells of electric sockets and lamp bases. Screw-thread standards for federal services. National Bureau of Standards Handbook. Vol. H28(1942) (1942 ed.). National Bureau of Standards. 1942. pp. 140–142. Retrieved 8 September 2020.
- "20". Interior wiring. I.C.S. Reference Library. Vol. 4B. New York: Scranton International Textbook Company. 1908 [1905]. p. S43 p41 (web 215/632). Retrieved 8 September 2020.

bailey.nl

"E5.5" designation does not exist in IEC 60061 database. Examples of usage:
- "(advertisement) Pisello E5.5 Fused 3V 1.5W CL". Bailey - The lamp company. Archived from the original on 19 March 2021. Retrieved 19 March 2021.

"American Standard for Threads for Lamp Sockets and Bases". ASA Bulletin. 3 (2). American Standards Association.: 83 1932. Retrieved 7 September 2020.
"(p256)". The Engineer (UK magazine). No. 127. Morgan-Grampian. 14 March 1919. p. 256. Retrieved 8 September 2020. (snippet)
Yates, JoAnne; Murphy, Craig N. (30 March 2021). Engineering Rules: Global Standard Setting since 1880. JHU Press. p. 108. ISBN 978-1-4214-4003-3. Retrieved 7 September 2020.
Dettmar, Georg (13 March 2013). Wegweiser für die vorschriftsgemäße Ausführung von Starkstromanlagen: Im Einverständnis mit dem Verbande Deutscher Elektrotechniker (in German). Springer-Verlag. p. 130. ISBN 978-3-642-47446-0. Retrieved 7 September 2020.
"(drawings of screw threads)". IEC Report of Plenary Meetings. International Electrotechnical Commission. 1935. p. 160. Retrieved 8 September 2020. Medium screw cap E 27
McManus, Chris (2004). Right Hand, Left Hand: The origins of asymmetry in brains, bodies, atoms, and cultures. Harvard University Press. p. 46. ISBN 978-067401613-2. Retrieved 25 January 2015.
Schneier, B. (2003). Beyond Fear: Thinking sensibly about security in an uncertain world. Springer Science+Business Media. p. 221. ISBN 978-038702620-6. Retrieved 25 January 2015.

"Light Bulb Shape and Size Chart". Bulbs.com. Reference charts. Retrieved 5 February 2018.

"灯泡螺口规格、灯泡的选购技巧". 搜房网家居装修 (in Chinese). Retrieved 28 February 2017. 最长[常] [sic]的使用的螺口灯泡规格是：E14和E27

"IEC 60061 International Standard – Lamp caps and holders" (PDF) (in French and English) (3.51 ed.). Geneva: IEC. December 2014. Archived from the original (PDF) on 16 April 2013. Retrieved 22 March 2015.(subscription required)

"FAQ". LED waves (ledwaves.com). Retrieved 5 February 2018. The E26 is the standard 120 Volt American base.

Eisenbraun, Blair (24 March 2011). "Left handed incandescent light bulbs?". eLightBulbs (lightbulbs.com) (blog). Retrieved 27 July 2016.

ANSI C81 series:
- "Specifications for Bases (Caps) for Electric Lamps" (pdf). National Electrical Manufacturers Association (NEMA). 3 July 2019. ANSI C81.61 American National Standard. Retrieved 8 September 2020.

U.S. patent 0,251,554 (applied 1881, awarded 1881) Two examples of screw system appear, including the kerosene-can lid, but their overall formations are incompatible with today's Edison sockets. No explicit claims for the screw system. Beware patents.google.com's preview mode lacks several pages, must download full PDF.
U.S. patent 0,438,310 (applied 1890, awarded 1890) A lamp base that is compatible with 3 competing socket systems (Edison, Westinghouse, Thomson-Houston). This patent is not about Edison system itself. It rather is an enhancement to the already existing Edison system. Beware patents.google.com's preview mode lacks several pages, must download full PDF.

"E26: – 般電球、ボール電球の多くがこのサイズ。". support pages. Sharp Japan. Archived from the original on 10 February 2015. Retrieved 30 January 2015.

"E26: – 般電球、ボール電球の多くがこのサイズ。". support pages. Sharp Japan. Archived from the original on 10 February 2015. Retrieved 30 January 2015.
"C6 bulb sets". lamp evolution. Archived from the original on 20 October 2006.
"E5.5" designation does not exist in IEC 60061 database. Examples of usage:
- "(advertisement) Pisello E5.5 Fused 3V 1.5W CL". Bailey - The lamp company. Archived from the original on 19 March 2021. Retrieved 19 March 2021.
- "IEC 60061 International Standard – Lamp caps and holders" (PDF) (in French and English) (3.51 ed.). Geneva: IEC. December 2014. Archived from the original (PDF) on 16 April 2013. Retrieved 22 March 2015.(subscription required)
- Formisano, Bob. "2007 Energy Bill – Are They Phasing Out or Making Incandescent Bulbs Illegal? Incandescent Exemptions: Where You Can Still Use Existing Bulbs". About.com. Archived from the original on 27 April 2009. Retrieved 22 March 2015.