Year: 1897

page_text: Date of Application, 29th June, 1897-Accepted, 31st July, 1897
Fig. 4 a plan.
The apparatus consists of a casting or base a resembling somewhat the headstock
of a lathe in which is mounted in suitable bearings bb a shaft or spindle c carrying
a pulley d and dises e eƒ ƒ between which are held emery or other suitable
grinding discs g h.
The outside disc of the discs e e ff is loose on the shaft and can be brought up
against the disc g or h, by a nut i or which are carried on the screwed ends of the
shaft c.
The base a has an extension a' which supports a slotted bracket having a
forked end or arm k set in a slanting position as shown. By means of the slot in
the bracket and a bolt and thumb nut & the position of the bracket can be varied.
In the fork of the bracket is carried a block the sides of which are grooved to
engage with the sides of the fork so that the block may be held in the fork but be
capable of a sliding motion therein,
The portions m of the sides of the block which engage with the faces of the fork
are cut at opposite angles as shown in Figs. 1 and 2 so that a rocking movement
may be given to the block. Attached to the block is a box or support
carrying
a screw on the end of which is supported the spindle n of a cutter holder a movement
of the screw enabling the spindle to be pushed in or out. The cutter holder consists of
two discs n¹n between which is clamped the cutter a nut working on the
screwed end of the spindle serving to tighten the upper disc n¹ upon the cutter.
The block is supported in the fork by means of an adjusting screw so that it
may be raised or lowered thereby.
On another extension a' is a slotted bracket o similar to the bracket & and having
a forked end o¹ but which is horizontal in its position. The position of the bracket
may be adjusted by a bolt and thumb nut o²
The forked end of the bracket is adapted to receive the block box l¹ and
cutter holder such as previously described such a one being shown in position
in the drawings but for the sake of clearness without any letters of reference
thereon.
The position of the block is adjusted in the forked arm o¹ by means of a spring »

page_text: Fig. 4 and an adjusting screw which enables the block to be moved to and from
the grinding disc . This disc is preferably provided with a bevelled edge as shown.
At the end of the forked end of is secured a small upright piece which acts as a
support for the edge of the cutter.
When in use a cutter is first preferably ground circular by placing it in the
cutter holder in the horizontal fork so that the bevelled edge of the grinding disc h
acts upon it and is then removed and the holder placed on the slanting fork so that
the grinding disc g acts upon and bevels or sharpens the edgo as shown in
Figs. 1, 3 and 4. By rocking the cutter slightly when in the slanting position the
necessary finish may be given to the edge. Each cutter revolves slowly as
the grinding disc acts upon it by reason of the manner in which the spindle on
which it is supported is carried.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be perforined, I declare that what
I claim is
-
1. In apparatus for grinding disc cutters a headstock or support a pair of
grinding discs carried by a shaft in same and a bracket adjustable with respect to
each grinding disc one bracket being arranged to present the cutter in a slanting
position to its grinding disc and the other to present the edge horizontally
substantially as described.
2. In apparatus for grinding disc cutlers a cutter holder consisting of a
spindle clumping discs carried thereby a block and a support or box in which said
spindle is loosely held an adjusting screw in said box to raise or lower the spindle
and means for carrying said block and box substantially as and for the purpose
described.
3. In apparatus for grinding disc cutters a bracket having a slanting fork a
block and box or support adapted to slide in some and to bave a rocking movement.
therein and a spindle adapted to be loosely rotated in the block and box means for
adjusting such spindle in same and means carried by the spindle for holding the
dise cutter substantially as described.
4. The general arrangement and construction of apparatus for grinding
disc cutters substantially as described and illustrated.
Dil the 1 of 1007