Improvements in Rotary Shafts, and Journal Boxes therefor.
Year: 1895

page_text: COMPLETE SPECIFICATION.
Improvements in Rotary Shafts, and Journal Boxes therefor.
I, AMBROSE STEVENS VOSE, of 13 High Street, Boston, State of Massachusetts,
United States of America, Manufacturer, 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 :-
This invention relates to a novel construction of rotary shaft and its journal boxes,
whereby lateral or radial motion or vibration of the shaft is avoided, and this
invention is especially adapted to machines in which an operating tool is secured
directly to the shaft to rotate therewith.
In the present instance, this invention is illustrated in a machine for treating the
heels of boots or shoes, and the said machine herein shown as provided with a
rotary cutter, which may be of any suitable or desired construction for trimming
the heels, or edges of the sole of boots and shoes.
In machines of the class referred to, as now commonly constructed and known to
me, the rotary cutter shaft is made cylindrical and is supported in cylindrical
journal boxes, and after running for a substantially short time, the journal box
becomes worn or enlarged, so that, the rotary shaft is afforded a slight radial or
lateral movement, which produces a vibration or trembling of the shaft and its
attached cutter or tool, and as a result, the work is imperfectly performed, that is,
the rotary cutter or tool chatters, and minutely gouges the leather or other material,
producing imperfections in the finished work, so that, after running a substantially
short time, the machine is rendered practically inoperative for perfect work,
until supplied with new journal boxes, which results in inconvenient delays and
expense.
.
This invention has for its object to obviate the above mentioned defects in
machines of the class referred to, and this result is accomplished in a manner as will
be described. In accordance with this invention, the shaft is provided at its
opposite ends with tapering or cone-shaped journals, the tapers of which extended
in opposite directions, and the bearings for the said shaft are provided with journal
boxes, having tapering or conical openings through which the tapering journals are
extended, the said conical or tapering openings corresponding to the taper of the
said journals. The journal boxes referred to, may be made cylindrical in form on
their outer circumference to fit cylindrical bearings on the machine, and the said
boxes are made adjustable as will be described to take up the wear, and thereby
maintain a true fit of the journals without liability of radial or lateral movement
thereof.
These and other features of this invention will be pointed out in the claim at the
end of this Specification.
Fig. 1 is a front elevation of a sufficient portion of a machine embodying this
invention to enable it to be understood.
Fig. 2, a longitudinal section of the machine shown in Fig. 1 on the line 2-2, and
Fig. 3, a sectional detail on the line 3-3, Fig. 1.
Referring to Fig. 1, A represents a yoke-shaped casting provided with arms a a¹
having hollow bearings a as, which parts may be of any suitable construction, such
as now commonly employed in boot and shoe trimming machines, the framework
described being usually supported upon an upright column or other suitable
foundation. The yoke-shaped piece or framework Ä supports a cylindrical shaft b
(see Fig. 2) which in accordance with this invention is made tapering or conical at

page_text: with screw-threads f" to receive a nut f, which locks the said fly wheel on the said
journal.
In the present construction of the machine, the journal box may be adjusted on
the journal 6' to take up the wear, by partially unscrewing the threaded collar c,
and then screwing up the collar c', which latter, acting against the bearing a³, draws
the journal box up on the tapering journal bi, after which the collar c is placed
against the box 6 and rendered fast on the shaft b.
To adjust the journal box 6, the operator unscrews the threaded collars c¹, cand
screws up the collar c, which latter acts against the bearing a and draws the
Cournal box 6' upon the journal b³.
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. The combination with a rotatable shaft provided with tapering or conical
journals extended in opposite directions, journal boxes having tapering holes through
which said journals extend, bearings for said boxes, and adjustable means at
opposite ends of the said bearings to adjust the said boxes on the tapering journals
and secure or lock the said boxes in their bearings in their adjusted positions, for the
purpose specified.
2. The combination with a rotatable shaft provided with oppositely extended
tapering or conical journals, journal boxes having tapering holes through which
said journals extend, and provided with screw threads on their outer peripheries,
hollow bearings through which said boxes extend, and threaded collars to engage
the screw threads of the journal boxes at opposite ends of their bearings,
substantially as and for the purpose specified.
3. The combination with a rotatable shaft provided with tapering journals,
tapering journal boxes for said journals, bearings for said boxes through which the
said boxes extend, means adjustable on the opposite ends of the said boxes
co-operating with the opposite ends of the bearings to adjust the boxes on their
tapering journals and lock the said boxes in their adjusted positions against
longitudinal movement in their bearings, substantially as described.
4. The combination with the shaft b provided with the oppositely extended
tapering journals 61 62, the tapering journal boxes 63 64 co-operating therewith
and provided at their ends with screw threads on their outer peripheries, the
bearings a² a³, and the threaded collars engaging the threaded peripheries of the
journal boxes and co-operating with the said bearings to adjust and lock the boxes
in their adjusted positions, substantially as described.
5. In a machine of the class described, the following instrumentalities, viz. :-
A yoke-shaped frame provided with arms a a¹ having bearings, oppositely tapered
journal boxes extended through said bearings, the shaft 6 provided with oppositely
tapering journals extended through the said journal boxes, and means secured to the
shaft 6 intermediate of its journals and by which rotation of the shaft in its journal
boxes, may be effected, substantially as described.
6. In a machine of the class described, the combination with a rotary shaft
provided with oppositely tapering journals, oppositely tapering journal boxes
through which said journals extend, bearings for said boxes, meaus to adjustably
secure the said boxes in their bearings, an operating tool secured to one of the
tapering journals beyond its box, and a fly or balance wheel provided with a tapered
bore to fit the tapered end of the other journal extended beyond its box, substantially
as described.
7. In a machine of the class described, the combination with the shaft b provided
at one end with the tapering journal 6¹ and at its other end with the oppositely
tapering journal 6 having its end adjacent to the shaft b provided with screw
threads c, journal boxes b b provided with tapering holes 66 6°, screw threads on
the peripheries of the said boxes at their opposite ends, bearings for said journal
boxes, threaded collars c, c', c², c³, the threaded collar c¹ engaging the screw-