A New Device for Cutting Key Seats in the Bosses of Wheels, Pullies, and the like.
Year: 1890

page_text: Date of Application, 7th Nov., 1890
Complete Specification Left, 5th Aug., 1891-Accepted, 19th Sept., 1891
PROVISIONAL SPECIFICATION.
A New Device for Cutting Key Seats in the Bosses of Wheels,
Pullies, and the like.
JAMES BARBOUR of Falls Foundry Belfast Ireland Engineer do hereby declare
the nature of this invention to be as follows:-
:-
This device for cutting key seats in the bosses of wheels pullies and the like is
designed for attaching to boring or turning lathes and it is arranged to occupy
little space so that key seats can be cut by mechanism while the object is on the
face plate of the boring or turning lathe.
The device consists of one or two milling tools or rotary cutters driven by an
endless chain carried upon a sliding ram or bar moving endwise in bearings attached
to the cross slide of the lathe motion being communicated to the apparatus by a
pulley at the opposite end of the ram to the cutter.
The rotary cutter or cutters are fixed to a spindle or socket carried in two bearings
on the end of the ram or slide. On this spindle or socket and between the bearings is
a toothed wheel driven by an endless chain which receives its motion from a similarly
toothed wheel carried on the outer end of the ram which is driven by a belt pulley
from any convenient source.
The ram or slide is trenched on two sides to receive the endless chain which
communicates motion to the rotary cutter so that the driving gear is kept within
the area of the ram and by this means a key seat can be cut in a hole practically
the same diameter as the ram.
The ram or slide is moved endwise at such an angle as to give the required taper
to the key seats.
The ram or slide is moved end wise automatically while the rotary cutter is in
operation by means of the usual arrangement employed on boring bars viz.: a screw
and nut revolving at different speeds so as to give a slow traverse with a
comparatively quick revolution of the screw.
Dated this 6th day of November 1890.
JAMES BAKBUUK.
COMPLETE SPECIFICATION.
A New Device for Cutting Key Seats in the Bosses of Wheels,
Pullies, and the like.
JAMES BARBOUR of Falls Foundry Belfast Ireland Engineer 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 device for cutting key seats in the bosses of wheels pullies and the like is
designed for attaching to boring or turning lathes and it is arranged to occupy little
space so that key seats can be cut by mechanism while the object is on the face
plate of the boring or turning lathe.
This new device for cutting key seats is shewn in the drawing herewith in
which

page_text: Fig. 6 shews the socket and wheel to carry and drive the cutter.
The same letters and figures of reference always apply to the same or like parts
in all the views and in the following description.
The device consists of one or two milling tools or rotary cutters (c) driven by an
endless chain (a) carried upon a sliding ram cr bar (b) moving end wise in
bearings ( attached to the cross slide of the lathe motion being communicated to
the apparatus by a pulley (d) at the opposite end of the ram (b) to the cutters (c)..
The rotary cutter or cutters (c) are fixed to a hollow spindle or socket (c')
carried in two bearings on the end of the ram or slide (b).
On the hollow spindle or socket (c) and between the bearings is a toothed
wheel (c) driven by an endless chain (a) which receives its motion from a similarly
toothed wheel (a) carried on the opposite end of the ram (b) to the cutter and
which is driven by a belt pulley (d) through a worm (d') and wheel (2) from any
convenient source.
The ram or slide (b) is trenched on two sides to receive the endless chain (a)
which communicates motion to the rotary cutter (c) so that the driving gear is kept
within the area of the ram (6) and by this means a key seat can be cut in a hole
practically the same diameter as the ram (b).
The ram or slide (6) is moved endwise at such an angle as to give the required
taper to the key seats.
The ram or slide () is moved end wise automatically while the rotary cutter (c)
is in operation by means of the usual arrangement employed on boring bars
viz. a screw (e) and nut (f) revolving at different speeds so as to give a slow
traverse with a comparatively quick revolution of the screw (e).
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
The device for cutting key seats consisting of rotary cutters driven by an
endless chain carried by a ram or sliding bar as herein described and illustrated.
Dated this 4th day of August 1891.
JAMES BARBOUR.