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US Patent: 1,168,143
Tapping Machine
Harry Weimer Alcorn - Barberton, OH
Frederick Reed Gravatt - Barberton, OH

USPTO Classifications:

Tool Categories:
metalworking machines : drilling and boring : tapping machines


Not known to have been produced

Guy Henry Ferguson
Charles Bryan Byers
Edward Thorpe
J. C. Larson

Patent Dates:
Applied: Mar. 27, 1915
Granted: Jan. 11, 1916

Patent Pictures:
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Munn & Co.- patent attorneys

Our invention relates to pipe tapping machines, as in water, gas, oil, or other systems, and the main object thereof is to provide an attachment for conventional tapping machines which renders the tapping operation much easier and quicker than is now possible. A further object is to provide such an attachment, which obviates the wear of a portion of the conventional machines, thereby avoiding the necessity for frequent and costly replacement of the worn portion. A further object is to provide such an attachment, which may be applied to a conventional machine by merely slipping the same thereon; and further objects are to provide such attachments which are of a size enabling the same to be carried in the pocket of a workman, which are formed of separable parts permitting easy cleansing, which are well adapted to the purpose for which they are designed, and which are comparatively inexpensive.

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