A patent for a soda-water fountain, with a specification
describing a fountain consisting of a tin lining, with an outer
shell of steel, having end caps fastened on,
"without flanges or projections, by tin joints, made by
soldering with pure tin, which, being a ringing metal, unites
closely with the steel exterior to make a firm and durable joint,
as other solders having lead in them will not do,"
and a claim for "the tin vessel, incased by a steel cylinder,
and ends soldered to the latter, in the manner substantially as
described," was reissued seven years afterwards, with a similar
specification and claim except in omitting from the claim the words
"steel" and "soldered to the latter."
Held that the
original patent was limited to a fountain whose outer cylinder and
end caps were united by a solder of pure tin, without rivets or
flanges; that if the reissue was equally limited, it was not
infringed by a fountain with end caps fastened to the
Page 124 U. S. 348
outer shell by a solder of half tin and half lead, as well as by
rivets, and with vertical flanges at one end through which the
rivets passed, and that if the reissue was not so limited, it was
void.
Bill in equity for infringement of letters patent. The case is
stated in the opinion of the Court.
MR. JUSTICE GRAY delivered the opinion of the Court.
This was a bill in equity for the infringement of letters patent
issued June 25, 1872, and reissued August 5, 1879, for an
improvement in soda-water fountains. The opinion delivered by the
circuit court in dismissing the bill is reported, and drawings of
the fountain of each party given, in 21 F. 641. The only claim
relied on at the argument of this appeal was the second claim of
the reissue; being the one most like the single claim of the
original patent. The specifications, the drawings therein referred
to, and the claims in question were alike in the two patents,
differing only, as shown below, by omitting in the reissue the
words of the original patent which are printed in brackets, and by
inserting the words printed in italics, and three additional claims
immaterial to the present inquiry. After a general reference to the
drawings, the specification proceeds as follows:
"My invention consists in a novel construction of a tin-lined
steel fountain for soda-water, and other aerated or gaseous
liquids, such fountain combining lightness with strength and being
of cylindrical form and uniform dimensions, or thereabout,
throughout its length, thereby adding to the convenience of packing
and handling; also being exempt from expansion or permanent lateral
distension by the interior pressure to which it is subjected, thus
preserving its form and contributing to its durability. Fountains
for the like purpose, as previously
Page 124 U. S. 349
made, have been largely expansive, and retained the set given to
them by extension, and being otherwise objectionable."
"In the accompanying drawing, A represents a block-tin interior
body of cylindrical form, with hemispherical or reduced ends, the
same constituting the tin lining of the fountain, and being
provided at one of its ends with a neck
b for introduction
of the usual or any suitable connections by which the fountain is
charged, and its contents drawn off, said neck receiving, or having
screwed into it a screw-coupling
c secured by a nut and
washer
d e on the exterior of an outer endcap B for making
the connection. C is the exterior shell or body proper, made of
galvanized sheet steel, as may also be the endcaps B B', which are
soldered to or over the extremities of the same and constitute, as
it were, parts of said body C that [closely] surrounds or fits over
the tin lining A. The endcaps B B' are united to the body C,
without flanges or projections, by tin joints, as at
f f,
made by soldering with pure tin, which, being a ringing metal,
unites closely with the steel exterior to make a firm and durable
joint, as other solders having lead in them will not do. Bands
g g of brown paper or other nonconducting material are
introduced between the tin lining A and steel body C at the ends of
the latter, to prevent the tin of the lining from being melted by
the heat used in making the pure tin joints
f f. The
fountain is also filled with water for the same purpose, prior to
making said joints. "
"The nonstretching character of the body C, by reason of the
same being of steel, insures the fountain preserving its shape, and
the absence of end flanges provides for the close packing of a
series of such formations when transporting or storing them. "
"[What is here claimed, and desired to be secured by letters
patent, is -- ]
I claim"
"The tin vessel A, encased by a [steel] cylinder C and ends B B'
[soldered to the latter] in the manner substantially as described,
as a new and improved article of manufacture, for the purpose
specified."
It has been argued for the plaintiff that the patent is for the
combination of an inner flexible vessel of tin or its
equivalent,
Page 124 U. S. 350
with an outer vessel of steel, or its equivalent, the outer
vessel being composed of a central cylinder, and of endcaps that
are slipped on to the cylinder and united thereto by tin solder, or
its equivalent.
But the only claim of the original patent is for "the tin
vessel, encased by a steel cylinder, and ends soldered to the
latter, in the manner substantially as described," and the manner
described in the specification of fastening the endcaps to the body
of the outer shell is
"without flanges or projections, by tin joints, made by
soldering with pure tin, which, being a ringing metal, unites
closely with the steel exterior to make a firm and durable joint,
as other solders having lead in them will not do."
The patentee himself testified that when he made his invention
he knew of others having used iron fountains lined with sheet block
tin; that the first fountains he made were soldered with tin and
lead solder, usually known as soft solder, and he found that would
not do, and therefore adopted a solder of pure tin, and that he
dispensed with rivets because they prevented the fountain being
repaired without tearing the shell in taking out the rivets.
In short, by the terms of the specification and claim, in the
then existing state of the art, and according to the intention of
the patentee, his patent was limited to a fountain in which the
caps were connected with the outer cylinder by pure tin solder,
without rivets or flanges.
In the fountain made by the defendant, on the other hand, the
caps are fastened to the body at both ends by a solder of half tin
and half lead, as well as by rivets, and there are vertical flanges
at one end, through which the rivets pass. It is quite clear,
therefore, that if the original patent had remained unaltered,
there would have been no infringement.
The reissue was taken out seven years after the original patent
and a year or two after the patentee knew that the defendant was
making such a fountain as is now alleged to be an infringement.
The repetition of the original specification in the reissue,
word for word (except only in the unimportant variation of
Page 124 U. S. 351
omitting the word "closely" in speaking of the fitting of the
shell to the lining), as well as the testimony of the patentee,
proves that there was no defect or insufficiency in the original
specification, and no error, inadvertence, or mistake in framing
it.
If the omission in the claim of the reissue, after the mention
of the outer cylinder and the ends, of the words "soldered to the
latter," before the words "in the manner substantially as
described," still leaves the claim to be construed and limited by
the previous description in the specification, the patentee is no
better off than if he had not taken out a reissue.
But if the effect of omitting the words in question is to extend
the claim to a fountain the outer cylinder and ends of which are
fastened together in any other manner than by a solder of pure tin,
the claim is enlarged by omitting an essential element of the
patentee's invention, and the reissue is invalid by the settled law
of this Court.
Miller v. Brass Co., 104 U.
S. 350;
Mahn v. Harwood, 112 U.
S. 354;
Parker & Whipple Co. v. Yale Clock
Co., 123 U. S. 87.
Decree affirmed.