Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Inventor
Alfred Herbert
John Milburn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Herbert Alfred Ltd
Original Assignee
Herbert Alfred Ltd
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Filing date
Publication date
Application filed by Herbert Alfred LtdfiledCriticalHerbert Alfred Ltd
Application grantedgrantedCritical
Publication of GB190408806ApublicationCriticalpatent/GB190408806A/en
Perforating, Stamping-Out Or Severing By Means Other Than Cutting
(AREA)
Forging
(AREA)
Abstract
8806. Herbert, A., and Milburn, J. April 16. Screwing. - A screwing-die or chaser with a guiding or pitch-preserving part has its straight teeth inclined at about the same angle D as the thread to be cut, and the surfaces of the teeth and thread are tangential along the centre line I-I of the die. A part G is removed to form a cutting- edge at the line of contact, and the leading teeth are topped as shown at H.
GB190408806D1904-04-161904-04-16Improvements in Screw Cutting Apparatus.
ExpiredGB190408806A
(en)