Improvements in or connected with Machinery or Apparatus for Finishing or Smoothing Curved or Rounded Surfaces or Edges of Artioles composed of Wood, Metal or other Materials.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Machinery or Apparatus for
Finishing or Smoothing Curved or Rounded Surfaces or Edges of
Artioles composed of Wood, Metal or other Materials.
I, EDWARD GODFREY BREWER, of 55, Curtain Road, in the County of London,
Mechanical Engineer, do hereby declare the nature of this invention to be as .
follows:-
The object of this invention is to provide efficient and economical mechanically-
acting means, for finishing or smoothing the rounded or curved edges or sur-
faces of articles composed of wood, metal, or other materials, and particularly
those inner rounded edges or surfaces of an open framework or structure,
although the apparatus is capable of acting upon the outer edges with equal
facility.
The machinery or apparatus constructed according to my invention is com-
posed substantially as follows:-
Upon a bed plate or foundation is fixed an upstanding bearing bracket or
brackets, to carry a main horizontal shaft, fitted with a pulley and revolved by
any convenient means.
Upon the face of one of the brackets I fit a radial arm extending upwards,
capable of circumferential adjustment concentrically with the main shaft, and
fitted with devices, such as segmental slots and bolts whereby after such adjust-
ment has taken place, the radius arm may be readily fixed in any required
angular position. The radius arm may be made straight or curved in accordance
with requirements.
At or near the upper end of the radial arm I joint or hinge one end of a second
arm, which I will term the carrier arm, and this latter carrics at its opposite
free end a bearing or stud axle to receive a freely running pulley.
Upon the horizontal shaft and adjacent to the radius arm, I fix a pulley in
such position that an endless band of cloth or other material having a suitable
outward abrading surface, composed of powdered glass or the like when the
machine is to be used for wood, and emery or a like substance when it is to be
used for metal, may extend around the pulley of the horizontal shaft and the
pulley of the carrier arm.
The radius arm is formed near its free end with a fixed or adjustable stop to
limit the angular movement which the hinged carrier arm may make with the
radius arm in the direction of the stop, and the carrier arm is further provided
with a counterbalance weight, spring, or equivalent, which tends to turn it
about its jointed end and draw the abrading belt taut between its pulleys.
Above the horizontal shaft I provide a work table having an aperture through
which the radius arm extends so that the carrier arm and its pulley are above
the table.

page_text: In operating with the machine, say upon the seat of a water closet with the
object of smoothing and finishing the rounded inner edge of the central aperture
the seat is placed on the table so that the carrier arm and upper pulley project
through the aperture of the seat, the machine being in motion and the abrading
belt stretched taut by the counterbalanced carrier arm.
The rounded edge to be operated upon is then pressed against the abrading
band and the pressure upon the latter draws downwards the carrier arm until
it reaches the stop upon the radius arm, and until the carrier pulley is situated
with its periphery adjacent to the upper surface of the seat while the abrading
band runs round the curve tangential with the upper flat surface of the work.
The article under treatment is held to the abrading band and moved in the
required direction by an operator.
The radius arm is adjusted and fixed in such a position, prior to commencing
the work, so that when the carrier arm reaches its controlling stop, the periphery
of the carrier pulley is at the proper distance above the surface of the work.
Preferably, and especially when the edge to be treated is of convex curvature,
the peripheries of the band pulleys are convexly curved.
Improvements in or connected with Machinery or Apparatus for
Finishing or Smoothing Curved or Rounded Surfaces or Edges of
Articles composed of Wood, Metal or other Materials.
I, EDWARD GODFREY BREWER, of 55, Curtain Road, in the County of London,
Mechanical Engineer, 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:-
The object of this invention is to provide efficient and economical mechanically-
acting means, for finishing or smoothing the rounded or curved edges or sur-
faces of articles composed of wood, metal, or other materials, and particularly
those inner rounded edges or surfaces of an open framework or structure,.
although the apparatus is capable of acting upon the outer edges with equal
facility.
In order that this invention may be readily understood, a construction of
apparatus, made in accordance with this invention, is illustrated in the accom-
panying drawings, of which Fig. 1 is a side view partly in section, and Fig. 2
is a sectional end elevation taken about the line XY of Fig. 1.
Upon a supporting framework A, bearing brackets B B are fixed, which
carry a main horizontal shaft C, fitted with fast and loose driving pulleys E E,
or other suitable means by which the shaft C may be driven.
Upon the face of the bearing bracket B', a radial arm F extending upwards is
fitted, capable of circumferential adjustment concentrically with the main
shaft, and fitted with devices, such as segmental slots and bolts, whereby after
such adjustment has taken place, the radial arm F may be readily fixed in any
required angular position. The radial arm F may be made straight or curved
in accordance with requirements.

page_text: At or near the upper end of the radial arm F I joint or hinge one end of a
second arm, which I will term the carrier arm G, and this latter carries at its
opposite free end a bearing or stud axle, to receive a freely running pulley H.
Upon the horizontal shaft C and adjacent to the radial arm F, I fix a
pulley J, in such position that an endless band, or abrading belt K, of cloth or
other material, having a suitable outward abrading surface, (composed of pow-
dered glass, or the like, when the machine is to be used for wood, and emery or
a like substance when it is to be used for metal,) may extend around the pulley J,
and the pulley H, of the carrier arm G.
The radial arm F is formed near its free end with a stop M, and the carrier
arm G is fitted with an adjustable stop bolt N which is arranged to engage with
the stop M, so as to limit the angular movement which the carrier arm G may
make with the radial arm F', in the direction of the stop M. The carrier arm &
is further provided with a counterbalance weight P, which tends to turn it
about its jointed end, and to draw the abrading belt K taut, between its pulleys H
and J; in lieu of a counterbalance weight being employed, a spring or equiva-
lent device might be substituted to effect the desired object.
Above the horizontal shaft C, I provide a work-table R, having an aperture
through which the radial arm F extends, so that the carrier arm G and its
pulley H are above the work-table R.
In operating with the machine, say upon a water closet seat T, with the object
of smoothing and finishing the rounded inner edge of the central aperture, the
seat T is placed on the table R, so that the carrier arm G and upper pulley H
project through the aperture of the seat T, the machine being in motion and
the abrading belt K stretched taut by the counterbalanced carrier arm Ģ.
The rounded edge to be operated upon, is then pressed against the abrading
belt K, and the pressure upon the latter draws downwards the carrier arm G,
until the stop bolt N comes into contact with the stop M, the adjustment having
been so arranged that the carrier pulley H is situated with its periphery adjacent
to the upper surface of the seat T, while the abrading belt K runs round the
curve, tangential with the upper flat surface of the work. The article under
treatment is held to the abrading band K, and moved in the required direction
by an operator.
The radial arm F and the adjustable stop bolt N, are adjusted and fixed in
such a position, prior to commencing the work, so that when the carrier arm G
reaches its controlling stop, the periphery of the carrier pulley H is at the proper
distance above the surface of the work.
Preferably, and especially when the edge to be treated is of convex curvature,
the peripheries of the band pulleys H and J are convexly curved.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. Machinery or apparatus for finishing or smoothing curved or rounded sur-
faces or edges of articles, composed of wood, metal, or other materials, consisting
of a rotatably driven shaft, carried in bearings mounted upon a framework, an
adjustable radial arm carried by one of the bearings, a counterbalance carrier
arm pivotally carried upon the upper end of the radial arm, and an adjustable
stop to control the angular movement of the carrier arm towards the radial arm,
a pulley carried by the carrier arm, an endless abrading belt passing around such
pulley, and around a pulley fixed upon the rotatably driven shaft, and a table
arranged to carry the work, all substantially as herein before described.
2. Machinery or apparatus for finishing or smoothing curved or rounded sur-
faces or edges of articles, wherein an endless abrading bolt is employed; the
arrangement of two pulleys, one, a driving pulley, and the second a guiding
pulley, which latter is carried by arms, whereby the guiding pulley, when the
work is applied to the machine, assumes a position adjacent to the upper surface

page_text: of the work, while the abrading belt runs in a curve tangential with the upper
flat surface of the work.
3. The general arrangement, construction, and combination of the parts com-
posing the machine, all substantially as and for the purposes herein before
described with reference to the accompanying drawings.
Dated th: 09111000
BREWER & SON,
London and Leeds, Agents for the Applicant.