IMPROVEMENTS IN THE GLANDS OF STUFFING BOXES FOR PISTON AND OTHER RODS
Year: 1872

page_text: LETTERS PATENT to John Newton Colby, of Mystic, State of Con-
.
necticut, in the United States of America, but at present of
Glasgow, in the County of Lanark, North Britain, for the In-
vention of "IMPROVEMENTS IN THE GLANDS OF STUFFING BOXES FOR PISTON
AND OTHER RODS."
Scaled the 3rd December 1872, and dated the 7th June 1872.
PROVISIONAL SPECIFICATION left by the said John Newton Colby at
the Office of the Commissioners of Patents, with his Petition, on
the 7th June 1872.
I, JOHN NEWTON COLBY, of Mystic, State of Connecticut, in the
United States of America, but at present of Glasgow, in the County
of Lanark, North Britain, do hereby declare the nature of the said
Invention of "IMPROVEMENTS IN THE GLANDS OF STUFFING BOXES FOR PISTON
AND OTHER RODS," to be as follows, that is to say:-
This Invention, which relates to improvements in the glands of
stuffing boxes for piston rods, valve rods, pump plungers, and for
stuffing boxes when used in other situations, consists in forming the

page_text: lower interior part of the gland of a long conical hollow shape, into
which the packing in the stuffing box enters as the gland is screwed
down. The effect of forming the gland in the manner described is to
compress the packing both circumferentially as well as endwise, thus
keeping it more closely around the piston rod than is obtained by end-
wise pressure alone. For the purpose of still further preventing leakage
a cap is placed at the outside end of the gland, and a portion of which
fits a groove formed thereon; into this an additional packing is placed
which becomes compressed by screwing up the cap.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 1
filed by the said John Newton Colby in the Great Seal Patent
Office on the 6th December 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
NEWTON COLBY, of Mystic, State of Connecticut, in the United States
of America, but at present of Glasgow, in the County of Lanark, North
Britain, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of June, in the year of
our Lord One thousand eight hundred and seventy-two, in the 35th
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said John Newton Colby, Her special license
that I, the said John Newton Colby, my executors, administrators,
and assigns, or such others as I, the said John Newton Colby, my
executors, administrators, or assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN THE GLANDS OF STUFFING BOXES FOR PISTON AND OTHER RODS," upon the
condition (amongst others) that I, the said John Newton Colby, by
an instrument in writing under my hand and seal, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.

page_text: NOW KNOW YE, that I, the said John Newton Colby, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying
Drawings, and to the letters and figures marked thereon, that is to
say :-
-
My said Invention, which relates to improvements in the glands of
stuffing boxes for piston rods, valve rods, pump plungers, and for
stuffing boxes when used in other situations, consists in forming. the
lower interior part of the gland of a long conical hollow shape, into
which the packing in the stuffing box enters as the gland is screwed
down. The effect of forming the gland in the manner described is to
compress the packing both circumferentially as well as endwise, thus
keeping it more closely around the piston rod than is obtained by end-
wise pressure alone. For the purpose of still further preventing leakage
a cap is placed at tlic outside end of the gland, and a portion of which
fits a groove formed thereon; into this an additional packing is placed,
which becomes compressed by screwing up the cap.
And in order that my said Invention may be properly understood, I
now proceed more particularly to set forth the system, mode, or manner
in or under which the same is or may be used or practically carried into
effect, that is to say :-
On the Sheet of Drawings hereunto appended my improved gland for
stuffing boxes, as constructed in accordance with this Invention, is
shown at Figure 1 in vertical section on the line a, a, Figure 2, which
is a plan of the same.
The gland A, as shewn more particularly at Figure 1 of the Drawings,
is formed at the lower interior part thereof with a conical hollow B, into
which the packing in the stuffing box C enters, when the gland A is
screwed down by means of bolts or studs, and nuts D and D' respectively.
The conical hollow B is preferably constructed in a series of rings c,
which gradually diminish in their internal diameter, the least diameter
being at the top or upper part.
In place of forming the conical hollow with rings as aforesaid, it
may
be made a continuous surface. The interior surface of the conical
hollow B being thus rendered uneven or stepped allows of a better grip

page_text: or hold of the packing being obtained when forced into it, and on the
gland A. being screwed down it compresses the packing circumferentially
as well as endwise, thus keeping it more closely around the piston rod E
than is obtained by endwise pressure alone as when ordinary glands are
employed. For the purpose of still further preventing leakage a cap {
or secondary gland F is placed at the outside end of the gland A. and
the lower part of which fits a groove d formed therein. That portion of
the cap F which fits into the groove d is also constructed at the lower
interior part thereof, with a conical hollow e formed in a similar manner to
the conical hollow B in the gland A, into which an additional packing is
placed, which becomes compressed around the piston rod E on the cap F,
being screwed down by means of bolts or studs and nuts ƒ and ƒ¹
respectively, and thus any leakage that may occur from the gland A
is stopped. The improved gland may however be used without the
cap F.
Having now described and particularly ascertained the nature of my
said Invention, and the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, I would
observe in conclusion that what I consider to be novel and original, and
therefore claim as the Invention secured to me by the herein-before in 2
part recited Letters Patent is, the arrangement and construction of
glands with a conic hollow and with or without a cap or secondary gland,
as herein-before described.
In witness whereof, I, the said John Newton Colby, have here-
unto set my hand and seal, this Fifth day of December One 2
thousand eight hundred and seventy-two.