US Patent: 1,362,799
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| Collapsible tap
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Patentee:
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| Peter Jardine (exact or similar names) - Hespeler, ON Canada |
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Patent Dates:
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| Applied: |
Oct. 30, 1919 |
| Granted: |
Dec. 21, 1920 |
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Joel Havens
"Vintage Machinery" entry for A. B. Jardine Co.
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Description: |
| "My invention relates to improvements in collapsible taps, and relates more particularly to a tap of this class which can be used for threading parallel and tapered bores or holes, and one object of the invention is to securely lock the component parts of the tap in expanded position and to provide automatic means whereby the said component parts are unlocked and fully collapsed at the proper time irrespective of the character of the work the tool may be doing. Another object of the invention is to permit the component parts of the tap to be manually re-set by one operation and so quickly positioned for use, at which time the parts of the tap are locked. A still further object of the invention is to make the tool adjustable so that the component parts of the tap may be adjusted to tap holes or bores of different diameters..."See also patent 1,362,800. |
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