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Patent for the new ringer

Started by McHeath, December 30, 2008, 10:29:20 AM

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McHeath

December 30, 2008, 10:29:20 AM
Here is the text of Cortelco's patent for their new ringer that replaced the standard C type ringers in the 500s and 554s.  There is a very interesting discussion of bell tap and an early electromagnet ringer about halfway down the page.


http://www.freepatentsonline.com/4823379.html

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