Improvements in Grinding, Milling, and Burnishing Machines.
Year: 1890

page_text: Date of Application, 10th Nov., 1890-Accepted, 13th Dec.. 1890
COMPLETE SPECIFICATION.
Improvements in Grinding, Milling, and Burnishing Machines.
We, WILLIAM Joseph Hands of 30 Wellington Road, Harborne, in the County of
Stafford, Manufacturer, and ARTHUR PRICE, of 187 Ladypool Road. Sparkbrook,
Birmingham in the County of Warwick, Engineer and Tool Maker, 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 :—
Usually metal articles that are stamped, cast or pressed, have points, fins, burs or
other sharp elges or parts projecting therefrom which require removal to fit the
articles for the market and this has heretofore been usually accomplished by filing
or grinding and burnishing tools operated by hand.
Now this invention has for its object to dispense with hand labour for filing or
grinding and burnishing (hereinafter called dressing) articles of the kind mentioned.
For this purpose we employ a machine constructed with a vertically movable rotary
tool shaped to suit the article to be operated upon and having an abrading or
polishing surface suitable for the work to be done. For grinding or milling, a rotary
metal disc is employed, that is cut or roughened after the manner of a file or milling
tool, at one or both sides, or at the periphery, or at each of these parts if necessary;
or an emery or other cutting stone can be used. For burnishing a smooth disc of
polished steel, or a disc of suitable material covered with material such as leather
can be employed.
In order that the invention may he readily understood we will proceed to describe
the same more fully by reference to the accompanying sheet of drawings in which,
Fig. 1 is a front elevation ;
Fig. 2 an end view ; and
Fig. 3 a plan of a machine or apparatus constructed according to this invention.
Fig. 4 is a front elevation; and
Fig. 5 a plan of a rest for holding an article whilst being dressed, and which may
for example be a fork as shown.
1 is a removable rotary grinding or burnishing tool of the kind herein before
described for the purposes specified. It is fixed upon a spindle 2 that rotates in bearings 3
carried by a pair of triangular shaped frames 4 that are mounted to turn upon a
driving shaft 5 for the purpose of raising and lowering the cutter spindle. The shaft 5
is mounted to run in bearings 6 carried by standards 7 on a base plate 8 and is
provided with fast and loose pulleys 9 and 10 respectively. To the cutter spindle 2
is fixed a toothed wheel 11 that gears with another toothed wheel 12 fixed to the
driving shaft and by which the cutter spindle is driven. By arranging the frames 4
to turn about the shaft 5 the toothed wheels 11 and 12 remain in gear whilst the frames
are being partly rotated to raise and lower the cutter spindle. To enable the frames
to be thus readily raised and lowered to suit the work to be done, they are connected
by a rod 13 to which is jointed one end of a connecting rod 14 the other end of
which is jointed to a lever arm 15 fixed on a shaft 16 working in bearings 17 and
operated by a lever 18 that may be actuated either by hand or foot. By these means
the rotary cutter or burnisher 1 can be readily raised and lowered to any required
position while the machine is in motion. 19 is an adjustable stop screw to limit the
pward movement of the frames 4 and consequently of the cutter or burnisher. 20 is
bollow support for a vertically adjustable rest 21 upon which the work to be dressed
s placed. This rest is formed with a slot 22 for the passage of the rotary cutter
or burnisher, and is provided with suitable pegs or stops 23 and with a holding down
gauge 24 to hold an article in position and prevent the same springing or lifting
whilst being dressed. The special form of rest shewn in Figs. 4 and 5 is suitable for
upporting and holding a fork 25, whilst dressing the same to remove the fins, points,
[Price 6d.]

page_text: or burs produced thereon by the cutting out or stamping operation necessary to make
the prongs 26 and intermediate slots 27. 23 23 are the set-pegs or stops to hold the
prongs in position whilst being acted upon by the cutter or burnisher which works
through the slot 22 in the rest.
As will be obvious a number of rests can be provided each adapted to suit a
particular kind of article to be dressed and each provided with suitably arranged
set-pegs to suit the class of work for which the rest is intended.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what
we claim is
1. A grinding milling and burnishing machine constructed with a rotary cutter
spindle carried in pivoted frames and capable of being raised and lowered whilst
it is rotating about its axis and mechanism capable of being actuated by hand or
foot power for raising and lowering the said cutter spindle substantially as herein-
before described and shown.
2. In a machine of the kind referred to in the preceding claim, a slotted rest
adapted to support the article to be dressed and provided with suitable gauge or
stop pegs substantially as hereinbefore described with reference to and shown in
Figs. 4 and 5 of the drawings annexed.
W. J. HANDS,
By L. W., per F. B.
A. PRICE,
By L. W., per F. B.