File:Design of a universal portable electric drill (1920) (14781124732).jpg

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Identifier: designofuniversa00conn (find matches)
Title: Design of a universal portable electric drill
Year: 1920 (1920s)
Authors: Connell, Edwin Lewis
Subjects: Electric drills Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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U. or 1. 9. 8. FORM 3
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U. OF 1. S. 8. FORM S CHAPTER VII 58 GONGLUSlOU 1. COMPARATIVE PERFORMSCE It is interesting to compare the performance of the newmachine with t^ at of the one it is to supersede. Figure 30 shouldbe coupared with Figure 28 bearing in mind the fact that the arma-ture size and speed are the same in both machines. The data onthe old motor is given at the beginning of Chapter IV, Case II.The increase in power available on alternating current from .26to .37 JlP maximum must be attributed to the superiority of thenew design. The na,/ tool weighs the seme as the old one, 20f-pounds. All perfoimance data on alternating current is made onthe basis of 60 cycles frequency which is the highest frequencyfor which the tool is recommended. On lower frequencies the al-terna-ting current perfoimance would, of course, approach moreclosely the direct current perfoimance. 2. PATEIIT STATUS The patent status of this motor is very important in viev/ ofthe present litigation over the Burke patent. The use of

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https://www.flickr.com/photos/internetarchivebookimages/14781124732/

Author Connell, Edwin Lewis
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Flickr tags
InfoField
  • bookid:designofuniversa00conn
  • bookyear:1920
  • bookdecade:1920
  • bookcentury:1900
  • bookauthor:Connell__Edwin_Lewis
  • booksubject:Electric_drills
  • booksubject:Theses
  • bookcontributor:University_of_Illinois_Urbana_Champaign
  • booksponsor:University_of_Illinois_Urbana_Champaign
  • bookleafnumber:128
  • bookcollection:university_of_illinois_urbana-champaign
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014


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current17:19, 28 October 2015Thumbnail for version as of 17:19, 28 October 20153,520 × 2,460 (1.5 MB)SteinsplitterBot (talk | contribs)Bot: Image rotated by 90°
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