Year: 1891

page_text: Date of Application, 11th Aug., 1891-Accepted, 12th Sept., 1891
Figure 5 is a front view;
Figure 4 is a sectional view on the line a, a, Figure 1;
Figure 5 is a detail plan view showing the spring and headed pin for preventing
the cutter shaft from rotating;
Figure 6 is a detail view of the attachment for grinding spiral or cylindrical
tools.
In the said drawing the reference numeral 1 designates the bed or base of the
machine having the horizontal flanges 2, which form guides for the movable
bracket 3, the sides of which are beveled to correspond with the said flanges.
Passing centrally through the lower part of this bracket is a screw threaded rod 4,
provided with a milled head 5. This rod also passes through an upwardly
projecting lug 6, secured to the base 1. By turning this screw the bracket can be
moved back and forth on the base. At the upper end the bracket is provided with
circular boxes 7, having lubricators 8, which form the journals of the driving
shaft 9, carrying at its forward end an emery or other grinding disk 10, secured
thereto in any suitable manner.
Formed with or secured to base 1 is an extension 12, having a circular recess in
line with the longitudinal centre of the machine. Within this recess seats a circular
disk 13, which is capable of rotating freely therein. The upper face of this disk is
flush with the upper surface of the extension and is provided with a transverse
dovetailed rib or projection 14. Engaging with this projection is a correspondingly
shaped slide 15, carrying a central annular disk 16, having curved slots 17. The
numeral 18 designates set screws passing through these slots into the slide 15, by.
means of which said disk is adjustably secured to the slide.
Projecting upwardly from the disk 16, is a hub 18, having a recess 20, about
midway of its length and with a vertical screw threaded bore with which engages a
screw 21, which also passes through and is secured to a milled nut 22, located in
said recess 20, so that said screw may be raised or lowered by rotating said nut.
The screw 21 is provided with a vertical groove 23 with which can be engaged the
set screw 24, passing through the upper part of the hub, for the purpose of rigidly
holding said screw. 21, and preventing it from rotating.
Mounted upon the upper end of screw 21, is a circular bearing 25, through which
passes the shaft 26, having collars or annular flanges 27 and 28 securely fixed
therein.. The collar 28 is provided on its periphery with a number of equi-distant

page_text: notches with which engage the correspondingly shaped end of a headed pin 29,
which passes through a slot 30 in a spring 31, secured to the bearing 25. When
the said pin engages with one of said notches the shaft 26 is prevented from rotating.
The numeral 32 designates a rotary sole trimming cutter secured to shaft 26, by
set screw 33.
Secured to the disk 13 is an arm 34, having an outwardly and upwardly
projecting portion 35, provided with a central bore within which is located a
vertically reciprocating rod 36, the movement of which is limited by the set
screw 37. The upper portion of this rod is cut away at 38, forming a lug 39 to
which is pivoted a bar 40. To this bar is secured a segment. 41, having a central
slot 42, through which passes a screw rod 43, having washer 44. To this bar 40
is secured a cylindrical or tapering tool 45, in any suitable manner.
The operation will be readily understood. The tool to be ground is secured on
the shaft 26, which forms the tool holder, and is properly adjusted with relation to
the grinding disk. Motion is imparted to the driving shaft which rotates the
grinding disk. After being properly ground the tool holder is rotated so as to
bring another cutter in position, by means of the spring actuated pins and the
notches in collar 28. By this means the tool holder will always properly present
the knives to the grinding disk. It will be noted that the tool holder can have a
. vertical, a horizontal, and an oscillating movement so as to accommodate the tool
being ground to all necessary requirements.
The manner of using the attachment for grinding tapering or cylindrical tools
will be obvious. By means of the pivoted bar and the segment which supports the
tool, the latter can be presented at any angle desired to the grinding disk, and by
means of the shaft supporting the bar it may also be adjusted laterally.
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 1
claim is
1. In a grinding machine, the combination with a driving shaft and grinding disk
carried by a longitudinally movable bracket, of an oscillating and vertically and
horizontally movable tool holder, substantially as described.
2. In a grinding machine, the combination with a driving shaft and grinding
disk carried by a longitudinally movable bracket, of a slide working on a dovetailed
rib or projection, a slotted disk secured to said slide by set screws and having an
upwardly projecting hub provided with a recess and a screw threaded bore, a screw
working in said hub, having a vertical groove, a set screw in the hub engaging with
said groove, a bearing carried by said screw and an oscillating shaft or tool holder,
substantially as described.
3. In a grinding machine the combination with a driving shaft and a grinding
disk carried by a longitudinally movable bracket, of a transverse slide, a hub
carried thereby, a screw rod carrying a shaft or tool holder, provided with a collar
having peripheral notches and a spring actuated rod or pin engaging with said
notches, substantially as described.
4. In a grinding machine the combination with a driving shaft and a grinding
disk, carried by a longitudinally movable bracket, of a transverse slide, a hub
mounted thereon having a recess, a screw working in said hub, a screw nut on said
screw located in the recess, a bearing upon the upper end of said screw, a shaft or
tool holder in said bearing having a collar with peripheral notches, a spring secured
to the bearings and having a slot, a pin or rod passing through said slot and
adapted to engage with said notches, substantially as described.
5. In a grinding machine the combination with the base, a bed, a driving shaft
and a grinding disk carried by a longitudinally movable bracket, of a disk seated in
a recess in the said base, having a rib or projection, a slide engaging with said disk,
an arm secured to said disk having an upwardly projecting hub, a shaft or rod
...working in said hub and a pivoted tool carrier, substantially as described.

page_text: 6. In a grinding machine the combination with a bed or base, a driving shaft and
a grinding disk, of a circular disk seated in a recess in said base, and having a rib
or projection, a slide engaging with said rib, an arm and hub secured to said disk
having a vertically adjustable rod or shaft, a tool holder pivoted to said rod, a
slotted segment attached to said rod by a set screw and secured to the tool holder,
substantially as described.
Dated this 10th day of August 1891.
FELL & WILDING,
Agents for the Applicant.