' Mr. Justioe Matthews
delivered the opinion of the court.
This is a bill in equity filed by the appellant.to restrain the alleged infringement of the complainant’s rights, as the" assignee of Frank'Davis, of reissued letters-patent No. 9901, fo.r an improvement in door-bolts. The original patent was No. 202,158,‘.dated April 9, 1878. The application for the reissue was filed April 1, 1881, the reissued letters-patent being, dated October 18, 1881. The alleged, infringement is of the third’ and fourth claims. As the case turns wholly upon the validity of the reissued patent, it is important, for purposes of comparison, to set out the original and the reissue in parallel
columns. So much, of the original as is excluded from the reissue is'marked'in. brackets, and the additions made by- the reissue are in italics. They are as follows:
Original.
“ Specification forming part ■ of letters-patent No. 202,158, dated April 9, 1878. Application filed January 29, 1878.
To aU whom it may concern:
Be it known that I, FkaNx Davis, of North Adams, in the county of Berkshire and' state of Massachusetts, have invented certain new and useful improvements in door-bolts; [and I do hereby declare that] the following is a [full, clear, and exact] description [of my invention, which, will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to • letters of reference marked thereon, which form a part of this specification/]
[This invention is an' improvement] on letters-patent [No. 190,561,] granted to [the undersigned] May 8, 1877.
The [nature of said] invention consists [chiefly] in combining a cylindrical outer cas-
Seissüe.
'
“
Specification forming part of reissued letters-patent No. 9901, dated October 18, 1881. Original No. 202,158, dated-April 9, 1878. Application, for reissue filed April 1, 1881.
To all whom it may concern:
Be it known that I, FbaNjk' Davis, of North Adams, in the county of Berkshire and state of Massachusetts, have invented certain new and useful improvements in door-bolts, ■
of which
the following is a description.
The improvements -me
on
the door-holt, for which
letters-patent
were
granted to
me
May 8,. 1877.
The invention consists in combining a cylindrical outer case with an inner
case,
con
!ing with an inner [casing,] constructed, and recessed as hereinafter described, said [casings] combining to inclose the operating mechanism, and to form a fulcrum and guide ' therefor; [and] in combining, with said [casings,] a bolt, pit-man, and [hub, so constructed and arranged as to operate in the same without pivot-pins or any additional devices, all as] hereinafter more fully [described] and claimed.
In the accompanying drawings Fig. 1 [represents the device as a whole] in perspective. Fig. 2 [represents] a perspective viey of the inner [casing and contents.] Fig. 3 is , a [detail] view of the bolt [and its attachments.] Fig. 4 is a detail view of the inner [casing.] Fig. 5 is a detail view of the outer casing.
[A designates a cylindrical metalic outer casing or sleeve, which is provided with opposite openings
a a
near its rear end, and with a hole
a1,
for attachment by means of screw a2 to inner casing 33.
It is obvious that any known equivalent fastening may be structed and recessed as hereinafter ’described, said
oases
combining to inclose the operating mechanism, and to form a fulcrum and guide therefor; in -combining with said
cases
a bolt, pitman, and
cranh; and in a pitman or connecting rod, performing the functions of both pitman and spring, as the above are
hereinafter more fully
set forth
and claimed.
In the accompanying drawings Fig. 1
shows the bolt
in perspective. Fig. 2
is
a perspective view of the inner
case cmd portions of some of the working parts.
Fig. 3 is a view, of the bolt,
spring and cranh.
Fig. 4 is a detail view of the inner
case, and
Fig. 5 is a detail view of the outer cáse.
To enable others to make and use my improvements in door-
belts,
I will describe them in detail.
A, Figs.
1
and
5,
is a cylindrical metallic outer case, having the holes
a a
near its. r.ea/r end, and hole
a1,
through which a screw
a2,
Fig.
1,
passes ■ into the inner case B, to hold the two cases together. The inner cylindrical case, B, Figs.
2
and
4,
is made to fit closely into
substituted for said screw. Said casing A is preferably, a mere shell of steel, but both the material and thickness can be considerably varied without departing from my invention. ■
Inner casing B is of brass, cast-iron, or other cheap metal, and has such diameter as allows it to pass-readily into said outer casing or sleeve, and to be conveniently withdrawn therefrom. It is provided at the front end with a disk, which has a central opening,
l>,
for the passage of the bolt, and ah annular flange,
b1
which
the outer ease, and has on its' front end a dish in ,’which is
'
the central opening,
b.
On its
’
front end the flange
b1
is formed, agamst which the ■ outer case comes. A slot,
'b2,
Fig.
4,
extends from the dish on the. front end the whole ■ length of the case. Another ‘ slot,
b3,
opposite, the
slot'b2,
extends bachwa/rd from the-'end’, dish, as. shown in Fig.
4.
These slots lea/oe the parts
b4 b4
of the inner case,
as
shown m Fig.
4.
A
groove, b6,
extends across the case betioeen the parts
b5
and
b8
of the case. A longitudinal slot,
b7,
bisects this
prevents it from being forced back too far within said, exterior casing. The bottom of said inner casing E has a broad longitudinal slot,
b2,
extending from end to end, and communicating with a similar longitudinal slot,
Is,
in the top of said casing B, which extends about, two-thirds of the length of said casing, beginning Just behind, said, front disk.' The interior of the forward part-of said inner casing is thus entirely removed, leaving vertical walls
bA Ifi
on each side of the space thus produced. This . space is separated by a transverse partition, b6, from a transverse groove,
be,
in the bottom of which is a longitudinal slot,
b7.
A transverse partition,
bs,
at the rear of said groove and slot, forms part of the rear end of casing B, and has in its top.screw-threaded hole or socket
b,9
for the reception of fastening screw
a2.
C designates the door-bolt, having guide-pins
c
on its side, and near its fear end a recess¿
o',
in which' works' the lower end of cranlo-arm D', formed in one piece with flat hub D. Said lower end of crank-arm • D' is connected by pitman E to the front part of said bolt.' Said hub
D,
when in position
groove a/nd is cut through, the case.
0', Fig.
3,
is the bolt, made with the lugs
c c,
only one of which is used. The projecting end is round, the part within the case is recta/ngular, one of the 'narrower sides fitting into the slot
b2,
and the other into
b,3,
Its rear end-is made narrower and thinner to ■ malte room for the crank, as shown in Fig.
3.
The crank D is made in the usual form, a/nd is arranged in a position to bring the hole through its larger ■ end in line with the groom
b6
on the inner case and with the openings
a a
in the outer case.
The pitman and spring F, Fig.
3,
is a straight hard-d/ra/um wire, and is connected to the bolt and crank by suitable pivotal connections. As shown in the drawings, its'ends a/re bent alright angles to its length and pass into holes in the bolt and crank, the spring being made long enough for the purpose. The lug c on the bolt is .so arranged relative'to the connections of the spring as to gire it the required degree of tension or “ set up,” it is called. 'The tension bends the spring over the lug
c,
as shown in Fig.
3.
The key has its shank, square
for use, extends up through.. said slot
V,
so that its square or similarly shaped central hole is in a line with transverse groove
¥
of inner casing ' B; and opposite holes
a a
of' .outer casing A. The prismatic shank of the key is passed through said holes and groove, and operated as usual to shoot or draw the bolt'.
I do not confine myself to the exact details of construction shown, as these- may be somewhat modified in various ways without departing from the spirit of my invention. ;
The working parts of my mechanism are more firmly secured and more perfectly protected than in my former patent, as hereinbefore recited. I also deem the .shape of my new hub and crank preferable for practical working.]
Having [thus] described my [invention], what I claim as new, and desire to protect by letters-patent, is —
• 1. The -combination, with a door-bolt and operating mechanism, of a cylindrical exterior [casing,] and a recessed inner .[casing,] said [casings] combining to inclose the operating mechanism, and to form a-ful- .
to fit the hole in the crqnfo, with a.round ¡pa/rtnear the handle to turn in the caseras shown ■ in Fig.
1.
Having described my
im--proved iolt and its mode of
operation, what I claim as new, and desire to secure by letters-patent, is— •
1. The combination,- with á door-bolt and operating mechanism, of a cylindrical exterior
ease
and a recessed inner
case,
said
eases
combining to inclose the operating mechanism, and to form a fulcrum and guide
crum and guide therefor, substantially as set forth.
2. The combination of [casing] A, having opposite holes
a a,
with inner [casing] B, having transverse groove
¥
hnd slot
V,
[flat hub] D, [having crank-arm D',] and the .bolt and pitman, substantially as set forth.
3. [The combination of cylindrical outer casing A with inner casing B, having annular front flange
¥,■
side walls
¥ ¥,
transverse partitions
¥
and
¥,
transverse groove
¥,
and slot
V,
said casings being securely fastened together and adapted to receive the bolt and working mechanism, substantially as set forth.]
therefor, substantially as set forth.
' 2. The combination of
case
A, having opposite holes
a a,
with inner
case
B, having' transverse groove
¥
and slot
¥, crcmlc
D, and the' bolt and pitman, substantially as set' forth.
3.
The corribimation of
_
the bolt O, prometed with the lug
c,
pitnnan E, operating as a pitman and
spring,
and ergnh T) to hold the
bolt,
substantially as set forth.
4.
In a cylindrical
door-bolt,
the pitman E, mTanged'and adapted to operate as a pitman and-
spring,
substantially as set forth.”
It will be observed that the first and second claims of the reissued patent are substantially the same as the first and sec-_ ond claims of the original patent, but as there is no allegation or proof of any infringement by the appellee of either of these they may both, be dismissed from further consideration. The third claim of the original patent ,is omitted, from the reissue, its place being taken by the third and fourth claims of the -latter-. The whole question is, whether the patentee and his assignee are entitled, under the circumstances of the case, to claim the pitman E, operating as a pitman and spring in. a door-bolt, as a distinct and separate invention, irrespective of its combination with the exterior and interior cases mentioned in. the first and second claims. This right is affirmed by the appellant and dénied by the appellee.
The invalidity of the reissued patent. is maintained by the appellee on two grounds : 1st, that the reissue embraces a' difr
ferent invention in the third and fourth claims from any described or contained in the- original specification; and, 2d, that, if it were otherwise, the patentee and assignee had, at the time of the application for a reissue, lost their rights to correct the defects in the original by their own laches. It was upop the latter of these grounds' that the Circuit Court proceeded in dismissing the bill. The undisputed facts on this pprt of the case are stated by the Circuit Court in its opinion, and are as follows:
“ The inventor, a carpenter by trade and not an educated. man, invented the device in November, 1877, and applied, ,in January, 1878, to Mr. Terry, a patent solicitor in New Haven, to procure • him a patent, specifying, as the invention 'to' be patented, the pitman, which, in connection with the crank, held the bolt and answered the double purpose of pitman and spring. ‘Terry, being in ill health, and, therefore, not then doing business, sent the case to his agent in 'Washington,, with Davis’s instructions. In due time the' papers were returned to,, Terry and were signed by Davis, who read them and supposed-that the application ‘ covered the spring, which he intended to ■ be patented.’ Terry did not read the application. The patent' was received by Davis in April, 1878. It does not ;appear' whether it was then examined or not. The plaintiff, did not' see the patent until after it was assigned to him, on May 28,, 1879. Whether he then read it pr not he does not know; but in the latter part of 1880, after the defendant had begun to-infringe, he did read it, and supposed, from the drawings, that the pitman-spring, as a separate invention, Avas secured by the' patent, until he was undeceived by Mr. Terry. In the spring of 1878 the plaintiff received from Davis a license to use the' pitman-spring upon another than the patented bolt. In September, 1880, Sargent & Co. commenced work upon the.patterns for the infringing bolt, and made the first bolts Decern-', ber 1, 1880.”
Ives
v.
Sargent,
21 Blatchford, 417.
The application for the reissue was nbt made 'until after .the lapse of nearly three years from the date of the original patent; that is, from April 9, 1878, until April 1, 1881. It may be assumed, as the effect of the evidence, that Davis, in
describing to Ms solicitor, - Tdrry, the -invention wMch he wished to have patented, specifically designated and described the pitman-spring as his.substantial invention, distinct from" , the combination of-wMch it formed a part in the first and second'claims of the patent. In-his testimony on this pomf, in answer to the question, “What did you'describe to him as the invention which you wished to have patented ? ” Davis states* “ I explained to Mr. Terry that I had got the spring, answering for a spring, and also for toning the bolt, a pitman-spring. ■ I didn’t know the term at that time; ” and also that he wished to have patented “ this pitman-spring, and tMs guard, lever, and that purchase it had in holding the bolt out or back; ■ also, ■ in moving the bolt out and back.” Terry, also, on the same . point, says, that Da-vis “ brought the invention or bolt to me ,and stated that he wanted to get it patented. He also stated what his invention was, as he considered it, that he wanted' patented,- and the thrng that he wanted patented particularly was the pitman or connecting-rod, which answered the . double purpose of pitman and spring, and in connection with the crank held the bolt when it was shoved out of the cáse and when it was drawn within the case.” Terry also states that, he sent “ a letter of instructions with the model, setting forth Mr. Davis’ wishes _ as he had expressed them to me.” The specification, as prepared by the solicitor in Washington, was retoned to Terry and-by him exhibited to Davis, who signed the application, as he states, after he had examined it and supposed it to be right, “covering the spring which I "intended to be patented.” Mr. Terry-states that he does not recollect whether he himself read over the specification and examined the claims at the tune Mr. Davis signed the papers, or not. On this application the patent was issued, and it does not appear to have been read or examined by any of the par-' ties in interest until after the appellee commenced making the • bolts now alleged to be an infringement. It was then discovered j!or the first time that the original patent did not cover the claim as now made, and the reissue was obtained to effect' that purpose.
- It is. admitted in argument- by the counsel for the appellant
that there was' negligence; it is contended, however, that it" was-not the negligence which in law is imputable to. the paten-’ .tee or- the.appellant, but the negligence of the solicitor em-' ployed by the patentee to obtain the patent. Counsel say, “it'wag the: Washington solicitor’s disobedience to instruction's which ■ caused the mistake, and Terry’s neglect to revise the.■application before sending.for Davis to sign it, which prevented its discovery.”
' The rule of diligence required in such cases, as the result of previous decisions of this court, is stated in
Wollensak
v. R
eiher,
115 U. S. 96, 99, in these words: “It follows from this, that if, at the date of the issue .of the original patent, the patentee had been conscious of the nature andi extent' of his invention, an inspection of the patent, when issued, and an! examination of its terms, made with that reasonable degree of care which is habitual to and expected of men, in thé manage-, ment of their own interests, in the ordinary affairs of lifej would have immediately informed him that the patent had failed fully to cover the area of his invention-. . And this must be deemed to be notice to him of the fact, for the law imputes knowledge when opportunity and interest, combined with reasonable care, would necessarily impart it. Not to improve such opportunity, under the stimulus of self-interest, with reasonable diligence, constitutes laches, which in equity disables the party who seeks to revive the right which he has allowed to he unclaimed from enforcing it to the /detriment of those who' have in consequence been allowed to' act as though it were abandoned.”
In
Mahn
v.
Harwood,
112 U. S. 354, 362, it was stated, that, “ If a patentee bus not claimed as much as he is entitled to claim, he is bound to discover the fact in a reasonable time or he loses ah right to a reissue; and if the Commissioner of Patents, .after the-lapse of such reasonable time, undertakes to grant a reissue for the purpose of correcting the supposed mistake, he exceeds his power, and acts under a mistaken view of the law; the court, seeing this, has a right, and it is its duty, to declare the reissue
pro tamto
void in any suit founded upon it.”
It is also settled that,, while no invariable rule can be laid ..down as to what is a reasonable time within which the paten-tee should seek, for the correction of a claim which he con- ' siders too narrow, a delay' of two. year's, by analogy to the law of public use before an application for a patent, should be construed equally favorable to the public, and that excuse for any longer delay than that should be made manifest by .the special circumstances of the case.
Wollensak
v. Reiher, 115 U. S. 96, 100 ;
Mahn
v. Harwood, 112 U. S. 354, 363.
In the present case no special circumstances in excuse for-' the delay are alleged. The excuse proffered is simply an attempt to shift the i-esponsibility of the mistake, as originally made, from the. patentee to his solicitor; but no excuse is •offered why .the patentee .did not discover the negligence and error of his solicitor in due time. On the contrary, he assumed/ without examination, that the specification and. claims of his patent were just what he had desired and intended they should be, and rested quietly in ignorance of the error and of his rights for nearly three years, and then did not discover them .until after others had discovered that he had lost the right to repair his error by his neglect to assert it within a reason,able time.
We
are, therefore, of opinion that the Circuit Court was clearly in the right in deciding the reissue void as to the third and fourth claims, on the ground that the right to apply for it had been lost by the laches of the patentee and his assignee.
We are also of opinion, however,-that the reissue is void on the other ground, viz., that it contains new matter introduced into the specification, and that it is not for the same invention as that described in the original potent. In support of the reissued patent, on this ground, it is contended, on the part of the appellant, that the invention of the pitman-spring device is shown in ths drawings, which .^are the same both in the original and the reissued patents. Al. tjhat edn be said in respect to the drawings is, that .they show the pitman-spring device as a part of the bolt intended to be covered by the patent, and described as a combination of which that device forms a part. There is nothing whatever in the drawings to'
show that the patentee claimed to be the invento». of -that. part separate from the combination, as a distinct novelty, useful by itself, or in any other combination; neither is it so described in the specification. The operating mechanism of - the bolt, as distinct from the casings, which are described as forming a fulcrum and guide to it, is described as
“
a bolt, pit-man, and hub so constructed and arranged • as to operate in the saíne (said casings) without pivot pins or any adcL'i-.' tiónal devices.” It is argued,' on this language, that the only additional device usual in such cases is a spring, and that, - therefore, the meaning of the specification is that no separate spring was required, and from that the inference is-to be made that- the pitman should operate both as a pitman and h spring; but this inference is entirely too obscure and remote.' It is nqt obvious that the additional device referred to'was a sprihg, and there is nothing in the language to suggest, what is clearly and fully expressed in the amended specification, • that “the pitman and spring E, Fig. 3, is a straight hard-' drawn wire, and is connected to the bolt and crank by suitable-, pivotal connections.” So that in the original description there is nothing to show of what material the pitman is made1 so as to operate as a spring, and there is no assertion in it of 'its.- . performing the double function of pitman and* spring: .
In this view, therefore, the case comes within the rule as-', stated in
Coon
v.
Wilson, 113
U. S. 268,
277.
Thére, as here,, the lapse of time and laches based upon it were considered immaterial, because the reissued patent was for a different. invention from that described in the original. “ The description had to be changed, in the reissue, to warrant ‘the new claims in the reissue. The description in the reissue is" not a more clear and satisfactory statement of what is described in-the original patent, but is a description of a different thing.”
¥e áre, therefore, constrained to the conclusion that the addition of the third and fourth claims, with the corresponding' alterations in the specification, is such an expansion of the-' invention as originally described as to destroy its identity, and.. to that extent to avoid the reissued patent. •
For these reasons, the'decree of the Oircu-it Qourt is affirmed. '