Improvements in Skiving Machines.
Year: 1892

page_text: Date of Application, 1st Mar., 1892-Accepted, 2nd Apr., 1892
COMPLETE SPECIFICATION.
Improvements in Skiving Machines.
I, HERBERT JOHN HADDAN, of the firm of Herbert & Co., Patent Agents, of
8, Buckingham Street, Strand, W.C., London, Civil Engineer, do hereby declare
he nature of this invention a communication to me from abroad by Jacob
Lookhard Scott, of New York, United States of America, Manufacturer, and in
hat manner the same is to be performed to be particularly described and ascer-
ined in and by the following statement :-
This invention relates to certain improvements in skiving machines pointed
ut in the following Specification and claims and illustrated in the accompanying
rawing in which,
COMPLETE SPECIFICATION.
Improvements in Skiving Machines.
I, HERBERT JOHN HADDAN, of the firm of Herbert & Co., Patent Agents, of
18, Buckingham Street, Strand, W.C., London, Civil Engineer, do hereby declare
the nature of this invention a communication to me from abroad by Jacob
Tookhard Scott, of New York, United States of America, Manufacturer, and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to certain improvements in skiving machines pointed
cut in the following Specification and claims and illustrated in the accompanying
drawing in which,
Fig. 1 represents a transverse vertical section in the plane a
Fig. 2 is a front elevation.
Fig. 3 is a transverse vertical section in the plane y y Fig. 2.
Fig. 2,
Fig. 4 is a face view of the roller die detached, showing the endgage and the
edgegage in position for feeding in the blank.
Fig. 5 is a central longitudinal section of the roller die.
Fig. 6 is a face view of one of the sections of the feed roller having teeth
extending partially around the circumference.
In this drawing the letter A designates the frame which forms the bearings
for the shaft B on which is mounted the roller die C, said shaft being provided
with a key a which engages a seat in the roller die, so that said roller die
can be readily removed and replaced by another as may be desired. The shaft B
is geared by cog wheels c d with a shaft D on which is mounted the feed
roller E. The shaft D has its bearings in hangers FF which are keyed to a
rod G mounted loosely in the standards A° A° of the frame A and one of the
hangers F is exposed to the action of a spring e which has a tendency to force
the feed roller up towards the roller die. A set screw serves to regulate the
position of the feed roller in regard to the roller die.
The feed roller is made in the form of a truncated cone and in order to bring its
face into proper relation towards the roller die, the shaft D is placed in an oblique
position as shown in Fig. 2.
H is the knife which is actuated in a plane slightly below the lowest portion of
the roller die. It is secured to a plate 'I which swings on a pin g and can be
adjusted up or down by means of set screws so that the cutting edge of the knife
can be readily brought into the required position towards the roller die.
This roller die is provided with a die i corresponding to the article to be skived
and it carries the endgage J which is fitted into a cavity (Fig. 1) and from
which projects a stud k into a cam groove formed in the outer surface of the
edgegage K (best seen in Fig. 3). This edgegage is firmly secured to the frame A
by screws mm (Fig. 2) which pass through slots in the shank n which extends
from the edgegage so that such edgegage can be adjusted towards and from the
roller die. The cam groove is formed in such a manner, that the endgage J is
caused to project beyond the circumference of the roller die during a certain
portion of the revolution of the same so that the operative can adjust the blank
over the die i with its end against the endgage and its edge against the edge-
gage and when the roller die has reached the position shown in Fig. 1, the
endgage is drawn inward while at the same time the blank is grasped by the
feed roller and carried against the edge of the knife. By the action of the knife
the blank is split and an article, such as a counterstiffener can be produced.
It has heretofore been remarked that the feed roller is conical so that the inner
edge of the blank is fed forward a little faster than the outer edge and consequently

page_text: the blank is caused to swing round during the operation of cutting, its inner edge
being retained in contact with the edgegage so that said inner edge is curved as is
required in forming such articles for instance as counterstiffeners.
In the example shown in the drawing the feed roller E is made in a number of
sections 1, 2, 3, 4, 5, and 6 and the outer sections 1 and 6 are provided with teeth
extending all round while the intermediate sections 2, 3, 4 and 5 are provided with
teeth only throughout a certain portion of their circumference (see Figs. 2 and 6).
Those portions of the blank which are acted upon by the teeth of the feed roller
sink into said teeth while those portions of the blank which are acted upon by the
plain untoothed sections of the feed roller are not permitted to sink down and con-
sequently a larger portion of the blank is split off by the knife at those portions
which sink into the teeth of the feed roller than at those portions which are
supported by the plain sections of the feed roller and the desired fullness or
thickness of certain portions of counterstiffeners or similar articles is preserved
while other portions are reduced to a smaller thickness.
The shaft B is geared with the belt pulley P¯mounted on a shaft which has its
bearings in the frame A.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In a skiving machine, the combination with the roller die, the feed roller,
mechanism for imparting motion to the roller die and the feed roller and the knife
of an edgegage secured to the frame of the machine, and an endgage carried by
the roller die and engaging a cam for moving it outward to its active position or
inward so as to clear the knife, substantially as described.
2. In a skiving machine, the combination with the roller die, the knife and the
edgegage of a conical feed roller and mechanisin for imparting motion to the roller
die and the feed roller, substantially as described.
3. In a skiving machine, the combination with the roller die and the knife,
of a feed roller composed of sections provided with teeth extending all round
and of sections having teeth only partially round their circumference, substantially
as described.
4. In a skiving machine, the combination with the roller die, the feed roller
and mechanism for imparting motion to these rollers of a plate I mounted on a
ping, set screwshh for adjusting this plate and a knife H secured to said plate,
substantially as described.
Dated 12 1
.1 1000
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.