An Improved Appliance for Shaping Curves or Portions of Circles.
Year: 1895

page_text: Date of Application, 10th Apr., 1895-Accepted, 4th Jan., 1896
.COMPLETE SPECIFICATION.
An Improved Appliance for Shaping Curves or Portions of
Circles.
HENRY GUY, 107 High Street West Cowes Isle of Wight Engineer, Boiler--
maker and Steam Launch Builder, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
This invention relates to an appliance for shaping curves which are portions of circles
of large radius, it is more especially adapted for shaping the curved links of link-
motions for slide-valves; and is arranged for attachment to the bed of an ordinary
shaping-machine, in the same manner as the usual table, for holding, the work
operated upon.
The ordinary feeding screw of the machine is disconnected from its driving gear,
and this gear attached to the feed screw of the above appliance, thereby imparting
the feed motion to the work being shaped, the saddle carrying the tool arm is.
secured to its bed for the time being and the tool actuated in the ordinary
manner.
DESCRIPTION OF ACCOMPANYING DRAWINGS.
Fig. 1. Sheet 1. Front elevation of the appliance a aa a, bb bb, and q, fixed to
the bed E E. of an ordinary shaping machine; L. being the tool-holder carrying
the rotating milling or other tool.
n. Table for holding vice or angle plate cast with and forming part of b b b b.
1. Screw for adjusting the work to be shaped to any required radius.
oo. Feed screw and shaft of my appliance, which, when actuated by the feed
gear of the shaping machine causes the object being shaped to traverse from right
to left and vice versa.
P. Universal joint.
Bracket carrying feed-screw of my appliance.
k. Pin to receive gab-ended rod of feed motion of shaping machine.
8. Bracket fixed to table n. for carrying nut of feed-screw t.
m. m. Slot in bb bb, to allow this part when actuated by the feed-screw o. to
traverse past the bolt which secures it with a sliding fit to the part a a aa, this
alot being of sufficient width to allow its moving freely when set to any radius from
the centre c.
Fig. 1. Sheet 2. Front elevation of my appliance as in Fig. 1. Sheet 1.
showing bbin half view of the part b b b b. and also a half view of its attachments,
viz.; g. the work to be shaped, d the vice or angle plate, n, table for carrying
vice, s, bracket fixed to table n, for carrying nut of feed-screw, and t the nut.
The letters of reference are exactly the same in this fig. as in Fig. 1,
Sheet 1.
Fig. 1. Sheet 2, also shows in dotted lines the part 6 b, at one extremity of its
travel.
This appliance consists of two principle parts, the one a a a a. Figs. 1. Sheets 1
and 2, having a square base a a, for fixing to the machine and carrying the screw I.
the other bbbb, is slotted to receive a block, k. which pivots on c. the pivot c.
being a part of the nut actuated by the screw I. this part also carries the vice or
angle-plate d. for carrying the link or work g.

page_text: The manner of using this appliance is as follows; the object to be shaped being
fixed in the vice d. the pivot casset to any desired distance or radius from the
centre line of the object, the-feed-screw o o. being set in motion will cause the
part bb bb, to pivot on the centre c, thereby moving the object to be shaped in
the curve due to the radius to which it is set.
Having now particularly described and ascertained the nature of my said inve -
tion, and in what manner the same is to be. performed, I declare that what I
claim is
The construction of the appliance as heretofore described and shewn in the
drawings as an adjunct to a shaping machine, for shaping curves which are
portions of circles.
Dated this Nineteenth day of November 1895.