Improvements in Apparatus for Shaping Clay Ware.
Year: 1897

page_text: Date of Application, 27th Oct., 1897-Accepted, 1st Jan., 1898
COMPLETE SPECIFICATION.
Improvements in Apparatus for Shaping Clay Ware.
I, FREDERIC GROSVENOR, of Eagle Pottery, Boden Street, Glasgow, in the County
of Lanark, Potter, 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 improvements in that class of apparatus for shaping
clay ware in which the articles are held upon a stationary mandril while the
shaping tool rotates.
The Invention is illustrated by the accompanying drawings, fig. 1 being a front
view of part of an improved machine for shaping clay ware showing the parts
upon which the improvements have been made, and fig. 2 is a part longitudinal
section of the same.
The apparatus comprises a framing A upon which a stationary spindle B is
carried, around which is caused to rotate a pulley C carrying on its face the arm D
of a shaping tool E. The arm ]) is secured on a spindle F on the face of the
pulley C and said spindle has at its other end a lever G the end of which is pro-
vided with a tailpiece H adapted to be acted upon by a movable cone I centred
upon the stationary spindle B. The cone I is advanced by the pressure of the
operator's arm upon a lever J, pivoted at K and so through the tail piece H the
shaping tool E is brought into contact with the clay ware upon a holding mandril L
at the outer end of the stationary spindle B, the cone is retracted by the action of
a spring K. The shaping tool E is returned to its normal position on the release
of the lever J by the action of a spring M coiled around the boss of the pulley C.
By thus pivoting the arm D of the cutting tool E the tool is advanced so that all
the points of its travel are in the same vertical plane by which means a greater
degree of accuracy in shaping the clay ware is obtained." A balance weight N is
placed upon the pulley C diametrically opposite the pivot of the lever arm D so
as to produce constant speed at all points of the rotation of the pulley.
Instead of pivoting the knife arm as described this arm may be adapted to slide
between guides D₁ on the pulley face as shown at figs. 3 and 4 or it may be formed
with a jaw adapted to slide over a guide piece as shown at fig. 5. In either case
a cam F¹ on the end of the spindle F works in a slot in the arm to effect the
advancement and retraction of the cutting tool E.
The holding mandril L instead of being of the usual tapering type may be
formed as shown at figs. 6 and 7 with an enlarged cylindrical portion L¹ joined by
a neck to a tapering portion L2, which portion L' in conjunction with the part L³
supports the clay ware during the cutting operation in such a position that its
axis is at right angles to the plane in which the cutting tool is advanced and at
the same time provides for readily placing the ware upon or removing it from the
mandril.
A collar secured upon the stationary shaft B is made conical and enters a
conical recess P in the eye of the pulley C which permits of the pulley being more
accurately centred when the wear upon the eye of the pulley renders adjustment
necessam

page_text: A conical enlarging knife Q is secured upon a rotating shaft R carried parallel
with the stationary shaft H which knife serves when necessary to enlarge the clay
ware receptacle to the size suitable to admit of such ware being placed upon the
mandril L, this shaft R being driven from any source of supply S. The shaft R
communicates motion by means of belts T and pulley U to a pulley V on an over-
head shaft W the centre line of which is situated in the same vertical plane as the
shaft B, which pulley V in turn drives the pulley C. The weight of the pulley C
is thus carried vertically which has the effect of producing a steady drive.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what I
claim is:
1. The improved apparatus for shaping clay ware constructed and arranged
substantially as described.
2. In apparatus for shaping clay ware the combination with a tool carrying
pulley of a shaping tool carried in an arm pivoted upon a spindle extending
through the face of the pulley or carried in an arm actuated by a cam on the said
spindle whereby said tool is advanced to its work in one vertical plane, substantially
as described.
3. In apparatus for shaping clay ware the combination with a tool carrying
pulley of a balance weight and a cone shaped collar substantially as and for the
purpose set forth.
4. In apparatus for shaping clay ware the improved arrangement of driving
gear substantially as and for the purpose set forth.
5. In apparatus for shaping clay ware a mandril constructed substantially as
described and adapted to truly support the clay ware during the cutting operation.
Dated this 26th. day of October, 1897.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62 Saint Vincent Street, Glasgow,
Agent for the Applicant.