Method for making a maintube of a telescope

Details Method for making a maintube of a telescope Method for making a maintube of a telescope

1996-04-23

1998-09-29

Bryant, David P.

Metal working

Method of mechanical manufacture

Shaping one-piece blank by removing material

33245, 72370, B23P 1304

Patent

active

058131078

ABSTRACT:
A method manufactures an integral maintube of a telescope from a shaft. One end of the shaft is first machined to form a cylindrical member and the other end of the shaft is secured in a mold device. One or more tools are used for gradually enlarging the cylindrical member into a cone member. The other end of the shaft is then machined so as to form a cubic member in the middle portion. An upper mold includes a mold cavity corresponding to that of the cone member and is engaged around the cylindrical member so as to form the cone member.

REFERENCES:
patent: 1647447 (1927-11-01), Hartnett
patent: 2357110 (1944-08-01), Heineman
patent: 3696516 (1972-10-01), Thompson
patent: 4211103 (1980-07-01), Grimaldo
patent: 4982502 (1991-01-01), Weyrauch

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