mittingly rotating nead in elevation.
Year: 1894

page_text: Date of Application, 6th Mar., 1894-Accepted, 14th Apr., 1894
mittingly rotating nead in elevation.
Figure 6 is a detached side elevation partly in section on the line rv of Fig. 5
showing one pair of holding jaws and one pilot together with their operating
devices.
Figure 7 is a section on the line ww of Fig. 6 showing said operating devices.
Figure 8 is a face view of the knockout together with a portion of the intermittent
head, and-
Figure 9 is a plan view of the knockout together with a sectional view of a nut
and elevation of the pilot.
A designates a driving shaft carrying a worm 10 for engaging the gear 11 of the
cam shaft 12. The nuts to be polished are hexagonal in form, as my machine is
arranged, and are placed in stacks in the chute or hopper 13 with two of their side
edges in a vertical position, while the angles formed by the other sides are at the
top and bottom of the nuts. At the lower end of the chute or hopper 13 is a space
large enough to permit the bottom nut to pass out in a sidewise direction, and
immediately opposite said space is a pusher or conveyor 14 arranged to slide in
suitable guides and acted upon by the angle lever 15 which is connected thereto by
a pin and slot connection as shown by full lines in Fig. 3 and by broken lines in
Fig. 1. This angle lever is pivoted to the frame of the machine at 16, Fig. 1, and
is pulled in one direction by means of the spring 17, as shown in Figs. 1 and 2,
while it is driven in the other direction by means of the cam 18 on the cam
shaft 12. When the projection of this cam 18 acts to move the pusher or
conveyor 14 against the bottom nut, it is pushed out of the hopper on to the
pointed pilot 19 which guides it into position between the jaws 20, said jaws being
carried by an intermittingly rotating head B. This head B is carried on the
shaft C, the end of which is provided with a pin wheel D that is engaged by the
worm E on the cam shaft 12, the thread of said worm being inclined for a portion
of its length to impart the necessary movement to the pin wheel and left straight
on the remaining portion so as to hold the pin wheel against rotation, all in a well-
known manner in mechanical movements. The jaws 20 are pivoted to the head B
at 21 as best shown in Figs. 3 and 6 and are drawn towards each other by means
of springs 23. The confronting faces of these jaws are made V shape to fit the
angular corners of a hexagonal nut as best shown by the end view of said jaws in
Figs. 5 and 8. In the disk or hub 24 of the head B, I arrange the rock shaft 25

page_text: .
16.
(Fig. 7) for each pair of jaws, and on one end of said rock shaft is an arm 26 having
a pin or projection 27 which rests upon the edge, of the stationary cam 28 (Fig. 2)
whereby as said arms are dragged past the projections of said cam the rock shafts
are operated. The nut is received. on, the pilot between the jaws when the rock
shaft arm 26 is held outwardly by the cam 28, thereby rocking the cross arm 29
and the links 30 that connect it with the jaws so as to force the jaws open and hold
} them in their open position until the intermittingly rotary head moves forward so
as to release the arm 26 from the cam and permit the springs to draw the jaws
together and hold the nut firmly thereon. At the first one-eight revolution of the
head from the point where the nut is received, no work is performed on the nut,
but during the next one-eight part of a revolution it is brought between the pair
of grinding or polishing wheels 31 and two of its opposite side edges pólished or
dressed off. At the next movement of the head, the rock shaft 25 is again thrown
outwardly by the succeeding point on the cam 28 thereby holding the jaws open.
The pilots are arranged to rotate in their mountings and provided with a ratchet
wheel 32 at their inner ends. Stationary trips 33 are arranged on the frame with
their ends in the path of these ratchet wheels so as to catch one of the teeth
thereof and rotate the pilot one-sixth of a revolution at a time when the jaws are
thus held open by the rock shaft and cam. The nuts are crowded on by the
conveyor with sufficient force to make them turn with said pilots. As the head
makes another movement, the jaws are released and the spring 23 draws them
together again, this time taking upon different corners of the nut and bringing two
other opposite sides into proper position to pass between the next pair of grinding
or polishing wheels 34. The third projecting point of the cam 28 will next act to
open the jaws and the ratchet wheel will be caught by the other one of the arms 33
to turn the pilot another one-sixth of a revolution and bring the two remaining
sides of the nut in position for passing through the third pair of polishing or
grinding wheels 35, thereby polishing the remaining two side edges of the six-sided
nut. The first and largest point on the cam 28 now again operates to move the
rock shaft and force the jaws open, and the knockout 36 is actuated by the arm 37
of the rock shaft 38 to force the nut off the pilot from between the jaws. The
rock shaft 38 is forced in one direction by means of the cam 39 on the cam
shaft 12 acting upon the arm 40 of said rock shaft, the spring 41 returning the
knockout and rock shaft to their former position after the arm 40 is released by
said cam.
.
:
The knockout is in the form of a curved lever shown in side view in Figure 2,
the end nearest the pilot being forked and provided with fingers 42 for extending
behind the nut 43 as shown in Figs. 8 and 9. The intermittingly rotating head
is supported on its shaft C by the hub 24, the jaws 20 being pivoted to the broad
side of said hub or disk as best shown in Fig. 3. This hub or disk is also grooved
as best shown in Figs 5 and 7 to make room for the cross arms and links of the jaw
opening rock shafts to work in. The pilots are mounted to rotate in blocks or
supports secured to the broad side of the disk or hub of the head B and a ring 44 is
secured to said blocks and over the jaws.. A portion of this ring is broken away in
Fig. 3.
The polishing wheels, mills, or dressers 31, 34 and 35 may be of any ordinary
construction either rotary or reciprocating. I prefer, however, to employ chuck
jaws to be compressed by the screw rings 45 to clamp within the chuck the
polishing, grinding or milling tools 46, and I prefer to make the working faces
thereof in the form of an annulus as shown. These wheels are mounted on the
shafts 47, 48 and 49 carrying suitable driving pulleys 50 for the application of a
driving belt, idle pulleys 51 being employed where desirable for giving the proper
belt contact.
.
In order to avoid crowding; I have not in all cases duplicated the figures of
"reference where a number of like parts are shown in the same view. In describing
"the operation of my machine. I have followed only one nut or piece of: work but it
will of course be understood that so long as nuts are supplied to the hopper, one

page_text: nut will be received on one of the pilots.at every period of rest of the head B so-
that after one complete rotation of said head the various operations described will
each be performed at their appropriate place on each of the several pilots. While
I have shown and described my machine as arranged for dressing or. edging
hexagonal nuts, I consider that there would be no departure from my invention by
arranging it for dressing or edging four or eight sided pieces. I have also
described the best known means for imparting the movements to the various parts,
but I do not wish to thereby waive any right to equivalents. For example, the
pin wheel and worm are a known means for imparting an intermittent movement to
a rotary device, and therefore I consider other means for giving a like movement
to the head an equivalent therefor.
Some of the most important features of my machine are a conveyor to transfer
the work from the hopper, a pilot to receive and guide the work into place on the
head, the head for carrying the work, dressing devices located in the path of the
work and means for turning the work to present different edges to the different.
dressing devices.
Having now particularly described and ascertained the nature of my said.
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. The combination of the intermittingly rotating head, the pilots mounted
thereon for receiving the work and guiding it to its position on said head, the
chute or hopper, and the conveyor for pushing the work from said hopper to the
pilots on said head, substantially as described and for the purpose specified.
2. The combination of the head, the pilots mounted on said head and the
conveyor for presenting the work to said pilot, substantially as described and for
the purpose specified.
3. The combination of the head, the pilots and holding jaws mounted thereon
and the conveyor for presenting the work to said pilots and jaws, substantially as.
described and for the purpose specified.
4. The combination of the jaws or holders and the pilot between said jaw³,.
substantially as described and for the purpose specified.
5. The combination of the head, the pilots mounted thereon, dressing devices.
located in the path of the work on said head and means for partially rotating said
pilots when not in position for presenting the work to said dressing devices and for
permitting them to remain non-rotative when said pilots are in position for
presenting the work to said dressing devices, substantially as described and for the
purpose specified.
6. The combination of the head, the pilot and jaws mounted thereon, means for
opening and closing said jaws and means for partially rotating said pilot when said
jaws are opened, substantially as described and for the purpose specified.
7. The combination of the head, the pilots mounted thereon, a ratchet mounted
on said pilot and a trip acting to engage said ratchet and partially rotate said pilot
within the head, substantially as described and for the purpose specified.
8. The combination of the head, the jaws pivoted thereon, the rock shaft also
mounted on said head, the tripping arm of said shaft, devices for connecting said
rock shaft with said jaws and the cam with which said rock shaft arm is engaged
for moving said jaws, substantially as described and for the purpose specified.
9. The combination of the intermittingly moving head, dressing devices located
in the path of the work as carried by said head, and means for holding the work
against independent movement on said head when the work is presented to said
dressing device, substantially as described and for the purpose specified.
10. The combination of the intermittingly moving head, devices for holding the
work in a fixed position with reference to said head when presented to said dressing
devices and means for turning the work while passing from one dressing device to
another to present different sides to the different dressing devices, substantially as
described and for the purpose specified.

page_text: 11. The combination of an intermittingly rotating head, a conveyor for presenting
the work to said head, devices for holding the work thereon, dressing devices
located in the path of the work as carried by said head, means for releasing the
work-holding-devices and a knock off for ejecting the work from the head,
substantially as described and for the purpose specified.
12. The combination of the jaws or holders, the pilot between said jaws and the
knock off, substantially as described and for the purpose specified.
Dated this 31st day of January 1894.
GEORGE
DUNHAM.
W. P. Thompson & Boult,
Agents for the Applicant.