Improvements in Machinery for Grinding Surfaces or Edges.
Year: 1892

page_text: Date of Application, 11th June, 1892
Complete Specification Left, 25th Feb., 1893-Accepted, 27th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Grinding Surfaces or Edges.
ERNEST SAMUELSON, of Banbury, in the County of Oxon, Engineer do hereby
declare the nature of this invention to be as follows:-
My invention relates to machinery in which a rotating and traversing disc
is used for grinding rotating or stationary surfaces or edges, and it consists
of a rotating shaft with which the disc is connected by a feather sliding in a groove
on the shaft, so that the disc revolves with the shaft. The traversing motion is
derived from a screwed countershaft which is made to revolve alternately in opposite
directions by any convenient mechanical means. This countershaft carries a frame
fitted with screwed nuts at one end, which nuts cause the frame to move alternately
in opposite directions on the countershaft. The other end of the frame has eyes
into which the bushes of the disc are inserted, thus causing the disc to traverse as
well as to revolve. The screwed nuts are made adjustable so as to put and keep
them in proper contact with the screw.
Dated this 10th day of Tune 1900
COMPLETE SPECIFICATION.
Improvements in Machinery for Grinding Surfaces or Edges.
I, ERNEST SAMUELSON of Banbury in the County of Oxford, 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:-
My invention relates to machinery in which a rotating and traversing disc is
used for grinding rotating or stationary surfaces or edges, and it consists of a
rotating shaft with which the disc is connected by a feather sliding in a groove on
the shaft, so that the disc revolves with the shaft. The traversing motion is derived
from a screwed countershaft which is made to revolve alternately in opposite
directions by any convenient mechanical means. This countershaft carries a frame
fitted with screwed nuts at one end, which nuts cause the frame to move alternately
in opposite directions on the countershaft. The other end of the frame has eyes
or bearings into which the bushes of the disc are inserted, thus causing the disc to
traverse as well as to revolve. The screwed nuts are made adjustable so as to put
and keep them in proper contact with the screw. And in order that my invention
may be more clearly understood, I add the following figures showing the apparatus
employed.
+
Fig. 1. is a general view of the grinding machine in side elevation.
Fig. 2. is a general view in end elevation.
Fig. 3. a plan.
Fig. 4. shows a separate sectional plan of the rotating and traversing disc.
Fig. 5. shows a side elevation of same.
Fig. 6. shows one method of reversing the rotation of the screwed countershaft.
Fig. 7. being side elevation of same gear.
Similar letters refer to the same parts in the different figures.
As I do not confine myself to any particular method of actuating gear for the
reversing shaft I merely show this as one method which may be adopted.
In Fig. 2. I show a rotary cutter A which is to be ground by the rotating
[Price 8d.1

page_text: disc B. This rotary cutter A is suspended either on centres or in journals by means
of adjustable slide brackets C C which are carried upon moveable brackets D D
bolted to the main frame or pan P. The rotary cutter A may be either what is
known as the "flange roller" of a lawn mower, or any other rotary or cutting disc or
series of knives, or a stationary cutter or knife can be fixed on to the brackets CC
by any well known mechanical means and adjusted to the face of the rotating
disc B and ground true upon the edge or surface. The rotating and traversing
dise B is mounted upon a bush E by means of 2 washers F F which are bolted
together on each side of the disc B as shown and which are fixed to the bush E by
means of a feather or key G. The bush E slides upon the main shaft H which is
carried in suitable bearings II at each end of the main frame or pan P and caused
to rotate by means of the pulley J or other known means. In the bush E is fixed
a long feather K which slides in a corresponding groove in the main shaft H from
one end to the other of same; the disc B therefore rotates with the shaft H and is
traversed along the shaft H from one end to the other by means of the screwed
countershaft L which is carried in suitable bearings M M fixed at each end of the
pan P. The reversing mechanism shown in Figs. 6 and 7 consists of bevel
wheels W, W1, W2, W³, & W, two of which W' & W rotate upon an extension
of the main reversing shaft L and can be connected thereto by means of the double
clutch V which is capable of sliding on this extended portion of the shaft L and
rotates therewith by means of the feather X which is fixed upon this portion of
the shaft L. In Fig. 7 the bevel wheels W³ & W with clutch V are not shown
the extended portion of the. shaft L being shown in section. This clutch V is
thrown backwards and forwards so as to engage with corresponding clutch faces
on the bevel wheels W and W by means of the well known rod and tappet
motion, adjustable stops Y¹ Y' on the rod R coming into contact with a lug Y
fixed on to the frame Z which carries the bush E. This frame Z is fitted with
nuts Z Z as shown, through which passes the reversing screwed shaft L. These
nuts are fixed to the frame Z by means of bolts or studs S¹ S' S¹ and can be turned
round in the bored portion of the frame Z to the extent permitted by the circular
grooves S² S³ S in the flanges of the nuts. This permits of the screwed nuts
being adjusted so as to be put and fixed into proper contact with the reversing
screw, and so as to take up any wear either in the nut or screw, after the machine
has been in use. The other end of the frame Z carries the bush E by means of
eyes or bearings E¹ E. Thus, the main shaft H being put into motion by means
of the pulley a rotating movement is given to the grind-stone or disc B and
through the bevel wheel W which is fixed to one end of the main shaft H, to
the bevel wheels W', W2, W, or W, and the clutch V to the screwed reversing
shaft L which causes the disc B to traverse from one end of the main pan P and
back again.
66
In the case of the surfaces or edges to be ground being a circular one such as a
flange roller" of a lawn mower, motion is imparted to same from the main shaft H
by means of suitable gearing or chain connection, so that the flange roller is kept
rotating at the same time as the grinding disc B. On the 2 washers F F, I fix
rings of sheet iron or other material F1, F2 which project beyond the end of the
bearings or eyes E', E³, to prevent the ingress of dirt or moist grit from
entering the bearings, and so destroying the surface of same and the bush E.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
1st. In machines for grinding surfaces or edges the combination of a frame
carrying a grinding or rotating disc at one end, with a reversing traversing
mechanism at the other end, as shown and described.
2nd. I claim in machines for grinding surfaces or edges in which a frame
carrying a grinding or rotating disc at one end is combined with a reversing
traversing mechanism at the other, and in which the traversing motion is derived

page_text: from a screwed countershaft carrying a frame fitted with a screwed nut or nuts,
making the said nut or nuts adjustable, as shown and described.
3rd. I claim the combination of the various parts in machines having rotating
or cutting discs for the purpose specified, as shown and described in the annexed
drawings.
DL
1
1000
ERNEST SAMUELSON.