Improvements in Skiving Machines.
Year: 1899

page_text: Date of Application, 20th Apr., 1899-Accepted, 24th June, 1899
COMPLETE SPECIFICATION.
Improvements in Skiving Machines.
I, CHARLES HENRY BAYLEY, of No. 111, Lincoln Street, in the City of Boston,
State of Massachusetts, United States of America, Gentleman, 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:-
-
My invention has relation to skiving machines and particularly to that class
of skiving machines employing a rotary knife and a horizontally arranged feed-
roll, and is intended to so improve the construction of that class of machines as
to permit the use of a bearing sleeve for the knife-shaft and yet avoid all objec-
tions that have heretofore been urged by practical operators against the use of
a bearing sleeve.
To these ends my invention consists of certain features of construction by which
is secured a quick and absolutely accurate adjustment of the knife relative to
the feed-roll, simple and perfect provision being made throughout for compen-
sating for wear of engaging parts, and by which, also, the quick and easy re-
moval of the sleeve containing the knife-shaft is permitted without in the least
interfering with the adjusting device and the sleeve, or without in any other
way disconnecting or dismantling the machine.
In the accompanying drawings I have illustrated one of the modes in which
I have contemplated embodying my aforesaid improvements.
Figure 1 is a front elevation of a skiving machine, the feed-disk being removed
to more clearly show the parts affected by my invention.
Fig. 2 is a detail end elevation showing the grinder and the knife in proper
relationship to each other and illustrating clearly the means for adjusting the
sleeve and compensating for wear.
Fig. 3 is a detail view in vertical section illustrating the adjustable engage-
ment between the sleeve and the knife-shaft.
Fig. 4 is a plan view, partially in section, of the sleeve, knife-shaft and adjust-
ing device.
Fig. 5 is a sectional plan view on line of Fig. 2.
Fig. 6 is a plan view of that portion of the bracket that supports the bearing
sleeve.
I will now give a detailed description of the form of my invention illustrated
in the drawings.
a designates the main driving-shaft from which motion is communicated to
the feed-roll b, to the knife-shaft c, and to the grinder d in any suitable manner,
as will be understood by those skilled in the art.
The knife-shaft c is mounted in a supporting or bearing sleeve e. Said bearing
sleeve is mounted in a movable bracket f which may have such adjustments as
may be proper and suitable to secure the proper relationship between the knife
and the feed-roll. Upon this bracket f I have shown an additional bracket f¹
secured thereto and supporting the grinder d, so that the grinder d and the knife
may be simultaneously inclined or tipped by means of the adjusting screw f, as
will be readily understood by those skilled in the art.

page_text: By means of the straps or clamping members g, which are tightened to place
by means of the screws h, the sleeve e is held in said bracket in such a way as
to permit it to slide longitudinally in said bracket, while making it possible to
quickly and easily remove said sleeve by withdrawing said screws.
I form intermediate of the ends of said sleeve, so as not to interfere with the
vertical adjustment, a lug or shoulder which is recessed to permit the inser-
tion of a collar which is adjustably secured to the shaft c by means of a set-
screw or the like. The lower end of the knife-shaft is formed with a hub / which
abuts against the lower end of the sleeve and which, by bearing against the
lower end of said sleeve, prevents the upward movement of the shaft in the sleeve.
The collar j, secured to the shaft, engages with the interior face of the recessed
lug or shoulder so as to prevent longitudinal movement of the shaft in the sleeve.
It is obvious that as fast as these bearing surfaces become worn the set-screw
holding the collar may be loosened to permit the knife-shaft to be thrust upward
until it bears firmly against the lower end of the sleeve, and that while the knife-
shaft is held in that position the adjustable collar can be pressed firmly to its
seat and again secured to the shaft while held in that position, thus securing
perfect freedom from longitudinal play by simply loosening or tightening a
single set-screw.
The lug or shoulder is extended some little distance to the rear of the sleeve
and is slotted in order to form a pair of jaws which are adjustable toward or
away from each other by means of a screw, the purpose of which will be
presently described.
An adjusting screw m is mounted in the bracket f to the rear of the sleeve
and is provided with a collar or shoulder m'. This collar forms an open engage-
ment with the recess between the jaws . It is obvious that as the collar m¹ and
the opposite bearing faces of the jaws become worn the screw may be tight-
ened, thus drawing two jaws together and compensating for the wear of the en-
gaging parts. I also provide suitable means, such as a binding screw n, for
clamping the adjusting screw m against aocidental movement, which
caused by the constant jarring of the machinery.
may be
It will thus be seen that the parts of the mechanism under consideration are
so constructed as to absolutely prevent backlash at every point as fast as the parts
become worn.
Not only is the engagement between the sleeve-adjusting device
and the sleeve adjustable to compensate for wear, but it is so constructed as not
to interfere in the least with the instantaneous withdrawal of the sleeve from its
supporting bracket, so that by the mere removal of the screws h the sleeve and
knife-shaft may be withdrawn without making it necessary to loosen other con-
nections or in any way to dismantle the machine.
It will be obvious to the skilled artisan that by my invention I have completely
overcome the objections that have heretofore been made to the use of a bearing
sleeve for the rotary knife-shaft, as I secure absolute freedom from backlash or
play of the parts, and also secure a construction which permits the prompt and
easy removal of the sleeve without interfering with the adjusting mechanism
or in any other way dismantling the machine.
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. In a skiving machine, the combination, with a rotary knife-shaft, of a sleeve
surrounding and supporting said shaft, a movable bracket, means for detachably
holding said sleeve in said movable bracket, whereby the sleeve may be quickly
and easily withdrawn to permit the removal of the knife.
2. In a skiving machine, the combination of a rotary knife-shaft, a longitu-
dinally adjustable supporting sleeve surrounding said shaft, an adjusting device
having engagement with said sleeve, said engagement being itself adjustable
to compensate for wear, whereby any longitudinal play of the sleeve is prevented.

page_text: 3. In a skiving machine, the combination of a rotary knife-shaft, a supporting
sleeve surrounding the same, said knife-shaft having engagement with said sleeve
to prevent longitudinal play in the sleeve, while permitting the free rotation of
the shaft, the engagement between said knife-shaft and said sleeve being adjust-
able to prevent any play as the engaging parts become worn.
4. In a skiving machine, the combination of a rotary knife-shaft, a supporting
sleeve surounding the same, said sleeve being recessed intermediate of its
ends to receive a collar, said collar being adjustably secured to said shaft so as
to permit free rotation of the collar and the shaft, while preventing longitudinal
play in the sleeve.
5. In a skiving machine, the combination of a rotary knife-shaft, a bearing
sleeve surrounding the same, a lug or shoulder formed on said sleeve interme-
diate of its ends, said shoulder being recessed to receive an adjustable collar
secured to the shaft, and an adjusting device having engagement with the lug
or shoulder to secure longitudinal adjustment of the sleeve and knife-shaft.
6. In a skiving machine, the combination of a rotary knife-shaft, a bearing
sleeve surrounding the same, said bearing sleeve being detachably mounted in
a movable bracket, a lug projecting from said sleeve and an adjusting device
arranged to engage with said lug without interfering with the removal of the
sleeve.
7. In a skiving machine, the combination of a rotary knife-shaft, a bearing
sleeve therefor, a supporting bracket for said bearing sleeve, a lug projecting
from said sleeve, an adjusting screw having detachable engagement with said
lug, substantially as described.
8. A device for securing vertical adjustment of the knife and its shaft relative
to the feed-roll, comprising a bearing sleeve, a lug thereon, said lug being slotted
to form clamping jaws, an adjusting screw having a collar arranged to pass
between said jaws, and means for drawing said jaws together to form a close
engagement with the collar, substantially as described.
9. In a skiving machine, the combination of a rotary knife-shaft, a bearing
sleeve therefor, said bearing sleeve being mounted to slide longitudinally in a
supporting bracket, an adjusting device for controlling said sliding movement.
and means for positively fastening the device against accidental movement while
the machine is in operation.
10. In a skiving machine, the combination of an adjustable bracket, means
for securing a positive and accurate adjustment thereof, a rotary knife-shaft and
a cooperating grinder carried by said bracket, said knife-shaft being surrounded
and supported by a sliding detachable sleeve, substantially as described.
11. In a skiving machine, the combination of a rotary knife-shaft, a bearing
sleeve therefor, said bearing sleeve being mounted to slide longitudinally in a
supporting bracket, an adjusting device for controlling said sliding movement,
the engagement between said adjusting device and said sleeve being detachable
to permit the quick and easy removal of the knife-shaft with its sleeve.
Dated this 20th day of April 1899
BOULT & WADE,
Agents for the Applicant.