Improvements in Apparatus for Dressing, Grinding, or Cutting Stone, Applicable for Cutting or Forming a Moulding Edge, and for like Purposes.
Year: 1888

page_text: Date of Application, 7th Mar., 1858
Complete Specification Left, 7th Dec., 1888
Complete Specification Accepted, 8th Jan., 1889
Improvements in Apparatus for Dressing, Grinding, or Cutting
Stone, Applicable for Cutting or Forming a Moulding Edge, and
for like Purposes.
I, WILLIAM RIGBY, of Upholland near Wigan in the County of Lancaster, Mason,
do hereby declare the nature of this invention to be as folllows:-
This invention has chiefly for its object an apparatus for grinding or dressing stone,
applicable for making the moulding edge on stone blocks, such as cornices, architraves
etcetera, in which the action is due to a mutual attrition between the periphery of a
revolving grinder and the surface of the stone to be ground.
In carrying out the invention, a travelling frame is provided on which can be placed
the slab of stone to be operated upon. The bed of the frame carrying the stone may
Above this frame, a
be adjusted to the thickness of the slab by means of a screw.
revolving grinder or grinders are provided, preferably made of metal, and a shape the
converse of the moulding desired. The guider revolves with a horizontal shaft and
operates upon the face or edge of the slab. The shaft can be driven by a pulley or
other suitable means. A weight causes the travelling frame with the stone upon it to
be drawn under and in contact with the revolving grinder, the latter being constantly
supplied with an abradant.
The mouldings may be wrought on stones in pairs temporarily united together, or
the stone may be in one piece and afterwards cut into two pieces, if desired by a saw,
which can be mounted on the same frame as the revolving grinder.
The mode of action is as follows:-
The stone is mounted on the travelling frame, and its height adjusted by the screw
or screws. A weighted cord or other device being attached to the travelling carriage,
the face of the stone will come into contact with the guides supplied with an abradant,
such as sand and water. The slab is moved under the grinder until the desired depth
of moulding is formed.
If the stone is to be cut into two pieces, the stone comes into contact with a saw,
which is placed at a suitable distance from the grinder. The carriage with slab
mounted on it is moved under the grinder, until the required depth of moulding is
obtained, or the stone is cut through by the saw.
Dated this 6th day of March 1888
WM. P. THOMPSON & CO.,
Of 6, Lord Street, Liverpool,
Patent Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Dressing, Grinding, or Cutting
Stone, Applicable for Cutting or Forming a Moulding Edge, and
for like Purposes.
I, WILLIAM RIGBY, of Upholland near Wigan in the County of Lancaster Mason
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 has chiefly for its object an apparatus for grinding or dressing stone
or the like, applicable for making the moulding edge on stone blocks, such as cornices,
architraves etcetera, in which the action is due to a mutual attrition between the
periphery of a revolving grinder or grinders and the surface of the stone or other
substance to be ground.
In the drawings,
Figure 1 is a side elevation of a machine constructed in accordance with this
invention.
Figure 2 is an end elevation with the material under treatment shown in section.
Figure 3 is a plan.
In carrying out this invention a travelling frame A is provided, upon the adjustable
top A¹ of which the block of stone B B or similar material is placed. This frame is
preferably supported on wheels a which run on rails or similar supports as shown.
Guide rollers A2 which bear against a fixed frame G are also provided. The top A¹
of the frame A is vertically adjustable in said frame by means of the rigid screw a¹
which bears in the circular nut a². The outside of this nut a² is provided with a
bevel wheel a³ which engages with the bevel wheel at said wheel a' being keyed or
otherwise fastened onto a shaft a which may be turned by a hand wheel a. Although
this is the method I prefer for adjusting the height of the table A', I do not bind
myself to the details thereof, as more than one screw may be used or they may be
applied or actuated in different ways; or if preferred a wedge or wedges or their
equivalent might be substituted. The top A¹ of the frame A is steadied in its vertical
movement by means of guides A², preferably made of angle iron. These also serve to
hold said top A¹ square and prevent it shifting when the machine is in action. It is
also steadied by means of a sleeve a' in which the depending portion of the screw a¹
slides. Above the top A¹ of the travelling frame A a revolvable grinder or
grinders Care supported on a preferably square shaft D which receives a rotative
motion by means of a pulley D¹ or its equivalent. This shaft D turns in suitable
bearings on the top of the fixed frame G of the machine. The grinder or
grinders CC are preferably made of metal and are the converse shape of the
moulding which it is desired to form upon the stone or stones B B¹. Any number of
interchangeable grinders may be provided. When it is desired to produce two or
more mouldings from one piece of stone, I provide a circular saw or saws E which

page_text: will act in conjunction with the grinders C C¹. The saw or saws E may revolve on a
separate shaft, but I prefer to mount the grinders CC with the circular saw E
between them on one shaft D. By these means when the machine is in action the
slab of stone will be both moulded or ground and divided longitudinally into pieces B B².
Or two pieces of stone may be temporarily joined, and ground together. The material
is fed under the grinders C C and saw E, if used by means of the travelling frame A
which preferably has a constant tendency to advance under the influence of a weight
or weights F connected to said frame A by means of a cord or cords for their
equivalent, which passes over suitable guides such as the pulleys f¹ƒ¹.
The mode of action is as follows:-
The stone B B¹ is mounted on the top A' of the travelling frame A, and its height
adjusted by the screw or screws a and their gearing.
The weight or weights F being connected to the frame A by the cord or cords, or
other device, the face of the stone will be brought into contact with the grinders
which are supplied with an abradant, such as sand and water. The slab is moved
along under the grinder or grinders C C¹ one or more times until the desired depth
of moulding is formed.
If the stone is to be cut into pieces, the stone comes into contact with the saw E.
The carriage with the slab mounted on it is fed along one or more times until the
stone is cut through by the saw or saws 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 :-
1. A moulding machine consisting essentially of a revolving grinder or grinders
such as CC, adapted to operate in conjunction with a suitable abradant upon the
block of material under treatment, and of a carriage A supporting said block, and
preferably provided with an adjustable top, the said carriage being automatically
advanced underneath said grinders in such a manner that the said block is pressed
against the same substantially as described.
2. In a moulding machine the combination with the revolving grinder or
grinders C C and with means for automatically pressing the block of material under
treatment against the grinding surface of same, of a circular saw or saws E operated
synchronously with the said grinder or grinders by means of which the said
material may be divided longitudinally substantially as and for the purposes
set forth.
3. The combined moulding and sawing machine as a whole, substantially as
described and shown.
WILLIAM RIGBY.
Wm. P. Thompson & Co.,
Of 6, Lord Street, Liverpool,
Patent Agents for the Applicant.