Improvements in Apparatus and Means for Grinding and Polishing.
Year: 1888

page_text: Date of Application, 10th Sept., 1888
Complete Specification Left, 11th June, 1889-Accepted, 20th July. 1889
PROVISIONAL SPECIFICATION.
Improvements in Apparatus and Means for Grinding and Polishing.
I THOMAS HUNT of Gorton Foundry Manchester in the County of Lancaster
Engineer do hereby declare the nature of this Invention to be as follows:-
My Invention has for its object to provide a grinding and polishing apparatus by
which the grinding or polishing device acts very efficiently and accommodates itself
readily to the shape of the various articles which are submitted to its action.
I mount the grinding or polishing device upon one end of a lever or to a suitable
frame or carrier capable of vibrating upon a spindle or centre carried by the frame of
the machine so that the grinding or polishing device adjusts itself or can be adjusted
to irregularities in the shape of the article being operated upon. The grinding or
polishing device I prefer shall be in the form of a roller disc or wheel rotating at a
high speed. The articles to be submitted to their action are mounted upon a bed in
convenient proximity to the grinding and polishing device and this bed is provided
with means by which its movement can be adjusted to suit the article operated upon.
Or the necessary adjustment of the articles in a circular or straight path may be
effected in any other suitable way.
I use as the grinding or polishing medium asbestos, wood, or leather preferably
secured or mounted in such a manner that the edges of the wood, leather, or sheets
or discs of asbestos are applied on edge to the articles operated upon.
may however be applied in any other suitable way.
Dated this 10th day of September 1888.
The materials
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus and Means for Grinding and Polishing.
I THOMAS HUNT of Gorton Foundry Manchester in the County- of Lancaster
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 has for its object to provide a grinding and polishing apparatus by
which the grinding or polishing device acts very efficiently and accommodates itself
readily to the shape of the various articles which are submitted to its action.
I mount the grinding or polishing device upon one end of a lever or swing frame or
to a suitable frame or carrier capable of vibrating upon a spindle or centre carried
by the frame of the machine so that the grinding or polishing device adjusts itself or
can be adjusted to irregularities in the shape of the article being operated upon.
The grinding or polishing device I prefer shall be in the form of a roller disc or
wheel rotating at a high speed. The articles to be submitted to its action are mounted
upon a bed in convenient proximity to the grinding and polishing device and this
bed is provided with means by which its movement can be adjusted to suit the article
operated upon. Or the necessary adjustment of the articles in a circular or straight
path may be effected in any other suitable way.
I use as the grinding or polishing medium asbestos, wood, leather, or the like
preferably consisting of thin sheets or discs secured or mounted in such a manner
that the edges of the sheets or discs of wood, leather, asbestos or the like are applied
to the articles operated upon. The materials may however be applied in any other
suitable way.

page_text: In order that my Invention may be properly understood I will describe with
reference to the accompanying drawings the manner in which it can be practically
carried into effect premising that I do not limit myself to the precise details shewn.
Figure shews an elevation and Figure 2 a plan of a machine or apparatus made
according to my invention. Figure 3 illustrates an arrangement for grinding or
polishing circular work.
D are
Referring to Figures 1 and 2 A is the bed of machine and B the feet upon which
it is supported. Cis the table shewing the adjustable reciprocating motion.
the adjusting stops and D¹ the tripper lever. D' is the rod connecting the lever D¹
with the reversing lever D³. D₁ is a balance weight with handles for ensuring the
reversing or stopping of the table and D' is a catch for holding the reversing lever in
position. De is the bell crank for the strap bar D' provided with strap forks for
shifting the strap as usual on the driving pulleys E. E' E' and E³ shew gearing
transmitting movement to the table. F are brackets carrying the swing frame or
levers G, and G¹ is a long bush upon which the said swing frame or lever turns on the
driving shaft G³. H is the pulley which is affixed to one end of the shaft G² and
may be driven from an over head counter shaft. The pulley His affixed to the
other end of the shaft G2 and by a belt drives the pulley H2 on the spindle of the
grinder or polisher I. At the outer end of the frame G is the cross stay K through
which the tie bolt K¹ passes one end forming a handle for raising and lowering the
swing frame or lever. To this handle or to the cross stay is attached one end of a
spiral spring K³ the other end being attached to the link K³ which has a slot and
locking screw and handle K for holding the swing frame or lever in the required
position with a variable elastic pressure on the work, A handle K³ is placed in the
link K³ for giving the requisite tension by hand to the spiral spring K². L is a
balance weight forming a stay for the swing frame or lever and equilizing the weight
on the grinder or polisher.
In Figure 3 C is the table to which the head stocks N and N¹ are bolted for
carrying the circular work O. I is the grinder or polisher. On the headstock N is
the circular gear for rotating the work. P is the worm wheel. P¹ the worm. P³ the
ratchet wheel P³ ratchet lever and P+ the feed rod. The other parts connected with
the grinder or polisher may be like those shown in Figures 1 and 2.
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. In apparatus for grinding and polishing a frame or lever carrying the grinding
or polishing device and capable of vibrating or swinging in proximity to a bed or
support substantially as hereinbefore described.
2. The arrangement and combination of parts constituting the grinding and
polishing machine substantially as herein before described and illustrated in the
accompanying drawings whether arranged as in Figures 1 and 2 or as in Figure 3.
3. In devices for grinding or polishing a grinder or polisher proper made of a
number of thin sheets or discs of wood leather asbestos or the like placed side by
side so as to present their edges to the work substantially as hereinbefore described.
Dated this 11th day of June 188a