Improvements in Machines for Refitting Valves.
Year: 1891

page_text: Complete Specification Left, 3rd July, 1891-Accepted, osn
COMPLETE SPECIFICATION.
Improvements in Machines for Refitting Valves.
I, CHARLES FRANKLIN HALL, of Skaneateles, in the County of Onandaga and
State of New York, United States of America, Manufacturer, do hereby declare
the nature of my invention for IMPROVEMENTS IN MACHINES FOR REFITTING
VALVES, 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 the class of valve-fitting machines in which a rotary
spindle is provided with a dog by which it holds the valve to be refitted and presses
said valve between cutters mounted on a face-plate or head.
The object of the invention is to provide a machine which shall afford greater
range of adjustment to operate on valves and valve-seats of different diameters, and
shall also be simple in construction and convenient and efficient in its operation;
and to that end the invention consists in the improved construction and combination
of parts hereinafter described, and specifically set forth in the claims.
In the annexed drawings,
Figure 1 is a side elevation of a machine embodying my improvements.
Fig. 2 is a vertical longitudinal section of that end of the machine on which is
mounted the cutter-head.
Fig. 3 is a vertical transverse section on line a x, Fig. 1,
Fig. 4 is a face view of the cutter-head.
Fig. 5 is a detached longitudinal section of a modification of the dead-spindle of
the machine, and
Fig. 6 is a face view of the cutter as used for fitting flat valve-seats.
Similar letters of reference indicate corresponding parts.
A represents the base of the machine. From one end of said base rises the
pedestal P, which is rigid in its position and preferably formed integral with said
base.
The top of said pedestal is formed with a rigid horizontal sleeve a, in which
is inserted movably longitudinally the dead-spindle d, which is secured adjustably
in its position by means of a set screw e, and preferably, also, by a jam-nut n
on the rear end of said spindle, which portion is screw-threaded for that
purpose.
To the exterior of the sleeve a are rigidly secured forwardly-extending arms bb,
to the extremities of which is rigidly attached the cutter head or main head C,
which is formed with a central aperture c The aforesaid dead-spindle d is axially
concentric with the aperture c, and has affixed to the end adjacent to the head Ca
supplemental head C', of the same shape and size as the aperture e, into which it
can be entered by sliding the spindle & toward the main head C. The centre d' of
the spindle d may be either rigid thereon or consist of a pin sliding in an axial
channel in the spindle, and held yieldingly protruding from the same by a spiral springs
back of the pin, as shown in Fig. 5 of the drawings, or said pin di may be otherwise
adjustably sustained in the spindle d-as, for instance, by screw-threads on the pin

page_text: working in corresponding screw-threads in the channel of the spindle. (Not necessary
to be shown.)
hh represent the cutters by which to trim and fit the valve, and for operating
on a globe-valve said cutters are formed conical and secured with their large ends
to the face of the cutter head C.
To adapt the machine to operate on valves of different diameters, I attach the
cutters adjustably in relation to their distances from the centre of the cutter head C,
and for this purpose I prefer to provide said cutter head with a series of bolt
holes i ii for each cutter, said bolt holes being arranged at various distances from the
centre of the cutter head and adapted to receive through them the attaching bolt el
of the cutter. The supplemental head C₁ may also be provided with such bolt
holes as shown in Fig. 4 of the drawings, in which one of the cutters is indicated
by dotted lines. For grinding or fitting a valve-seat the cutters are to be
reversed so as to set them with their small ends against the cutter head. In this
latter position the cutters are also placed for operating on a flat valve-scat, such
as is required for check-valves and others, and for which purpose I provide
the large end face of the cutter with cutting teeth, as shown in Fig. 6 of the
drawings.
Drepresents the rotary or live spindle, which is journalled in a sleeve D' on the
top of the pedestal or post P¹, which is mounted movably on a guide y, secured to
or formed on the base A, and one or more set screws &t, passing through the foot
of the pedestal and engaging the guide, holds the pedestal in its desired position.
Said pedestal can thus be set a greater or less distance from the cutter head C, as
may be required to bring the valve to be operated on in proper position against
the cutters. The end of the live spindle D adjacent to the cutter head is provided
with a suitable dog for engaging the valve-stem so as to compel the valve to
rotate with the spindle.
For operating on spindle, wing, and check valves the cutters are secured to the
main cutter-head, the supplemental head C₁ being in that case removed from the
main head to allow the end of the valve to pass through the aperture and
become centred on the supplemental head, as shown in Figs. 1 and 2 of the
drawings.
Fig. 1 also illustrates the method of operating the machine. The dotted lines
represent the valve and its stuffing box. The valve proper being of a conical form
is inserted between the correspondingly shaped cutters hhh which have been
adjusted on the cutter-head, so as to come in contact with the bevelled sides of the
valve disposed concentric with the cutter head C. The dead spindle d is pushed
toward the end of the valve-stem and centered thereon, while the dog engages
the handle of the valve so as to cause the same to turn with the spindle D. By
rotating this spindle and at the same time pushing it toward the cutter head C
the valve is rotated between the cutters and forced against the same with the
requisite force to cause the cutters to dress and refit the face of the valve.
For operating on small valves the dead-spindle d is pushed toward the main
head C to seat the supplemental head C' in the aperture c, where it is retained by
fastening the spindle d in the sleeve a. The cutters in this case are attached to said
supplemental head.
Having now particularly described and ascertained the nature of my inven
tion and in what manner the same is to be performed, I declare that what 1
claim is :-
1st. A valve-fitting machine comprising a rotary spindle, a work-holding dog on
the end of said spindle, a head facing said end of the spindle and secured stationary
in its position, and cutters attached to said head adjustably in relation to the centre
thereof, as set forth.
2nd. In combination with the rotary spindle and a work-holding dog attached
to the end of said spindle, a head facing said end of the spindle and provided with

page_text: a central aperture, cutters rigidly secured to said head, a dead-spindle disposed
axially concentric with the aforesaid aperture and movable longitudinally to and
from the same, and fastening devices holding the latter spindle adjustably in its
position, as set forth.
3rd. In combination with the rotary spindle provided with a work-holding dog
on its end, a main head facing said end of the spindle and formed with a central
aperture, cutters secured to said head, a dead-spindle disposed axially concentric
with the aforesaid aperture and movable longitudinally to and from the same, a
supplemental head of the shape and size of the aperture in the main head and
secured to the end of the said spindle adjacent to said main head, and fastening
devices holding said latter adjustably in its position, substantially as described
and shown.
4th. The combination, with the base A, of the pedestal P, formed integral with
said base and having the sleeve a affixed to it, arms bb, rigidly attached to and
extending from said sleeve, the main head C, secured to said arms remote from the
sleeve and provided with the central aperture c, the spindle d, sliding in said sleeve,
the supplemental head C₁, attached to said spindle, the set screw e for fastening
the spindle, cutters attached to the main head, and the rotary spindle D, provided
with the work holding dog, substantially as described and shown.
5th. In a machine for fitting valves, the combination, with the cutter-head, of
cutters of conical shape secured reversibly to the cutter-head and provided with
teeth on their bevelled sides and on their large end faces, substantially as described
and shown.
Dated this 2nd day of lul 1901
F. W. BARKER,
Applicant's Agent.