Method of Casting Chilled Valve-Seats Page: 2 of 2
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UNTE STATES PATENT OFFICE
BURWELL BOYKIN, TR., OF BEAUNONT, TEXAS.
METHOD OF CASTING CHILLED VALVE-SEATS.Speoilcation of Letters Patent.
Patented Mar. 11, 1919.
Application filed December 16, 1918. Serial No. 267,014.
To all whom it may concern:
Be it known that I, Buewnu BoYKIN,
Jr., a citizen of the United States, residing
at Beaumont, in the county of Jefferson and
5 State of. Texas, have invented a new and use-
ful Method of Casting Chilled Valve-Seats.
of which the following is a specification.
This invention relates to valve seats and
to a method of casting the same, one of its
10 objects being to provide a one-piece seat the
active face of which is hardened by chilling
during the casting operation, thereby to in-
crease its wearing qualities.
A further object is to provide means
15 whereby, when the molten metal is poured
into the mold, a portion thereof will be
chilled, the chilling means being retained
in the mold for use in successive casting op-
erations.
20 With the foregoing and other objects in
view which will appear as the description
proceeds, the invention consists of certain
novel features and in the novel steps in the
method of making the seats, as will be here-
25 inafter more fully described and claimed, it
being understood that various changes may
be made in the apparatus used and in the
method pursued, without departing from
the spirit or sacrificing any of the advan-
SO tages of the invention as set forth in the
appended claim.
In the accompanying drawings the pre-
ferred form of the invention and the ap-
paratus used in carrying out the method
15 have been shown.
In said drawings
Figure 1 is a plan view of the drag of the
mold with the chills therein.
Fig. 2 is a bottom plan view of the cope.
co Fig. 3 is a vertical section through the
assembled mold ready to receive'the molten
metal.
Fig. 4 is a section through a valve seat
such as produced by the mold.Referring to the figures by characters of 45
reference, 1 designates the drag filled .with
sand, as ordinarily. Embedded in the sand
2, at desired points, are chills 3 which can
be circular plates, as shown, the upper faces
of the chills, if desired,-being raised slightly 50
above the surface of the sand 2. Patterns,
not shown, are adapted to be placed on the
chills, after which sand is placed in the cope
4 and thoroughly packed. The cope is lifted,
the patterns removed, and- the cope replaced 55
on the drag. Molten metal is then poured
into the gate 5 and will be distributed to the
various runways 6 and the blanks 7, com-
pletely filling them. The hot metal, comes
into contact with the chills before the blanks 60
are filled and when the operation ,is com-
pleted, the cope is removed, the cast articles
lifted from the mold, and the foregoing op-
eration repeated. It is to be understood that
the chills are not removed from the mold. 65
A valve seat, such as produced in the man-
ner described is - formed with a hardened
wear portion, as shown at 8 in Fig. 4 and
will be superior to seats made in the usual
manner. 70
What is claimed.is
The hereindescribed method of producing
valve seats which consists in embedding a
chill plate in the sand of a drag with its face
exposed, placing a pattern on the chill plate, 75
packing sand in a cope and about the pat-
tern, removing the pattern to form a blank
closed at the bottom by the chill plate, and
supplying molten metal to the blank.
In testimony that I claim the foregoing 80
as my own, I have hereto affixed my signa-
ture in the presence of two witnesses.
BTRWELL BOYKIN, JR.
Witnesses:
Txos. F. NEESON,
E. L. BoxIN.1,296,751.
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Boykin, Burwell, Jr. Method of Casting Chilled Valve-Seats, patent, March 11, 1919; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258436/m1/2/?q=%22%22~1: accessed June 29, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.