CERTAIN IMPROVEMENTS IN LOCKS AND LATCHES, AND IN IRON ROOMS, DOORS, SAFES, CHESTS, AND OTHER REPOSITORIES
Year: 1843

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, we, EDWARD
TANN, senior, EDWARD TANN, junior, and JOHN TANN, of Minerva Terrace,
Hackney Road, in the County of Middlesex, Iron Safe Manufacturers, send
greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Twenty-fifth day of November (1843), in the seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Edward Tann, senior, Edward Tann, junior, and John Tann, Her
especial licence, full power, sole privilege and authority, that we, the said
Edward Tann, senior, Edward Tann, junior, and John Tann, our exors,
admors, and assigns, or such others as we, the said Edward Tann, senior,
Edward Tann, junior, and John Tann, our exors, admors, or assigns, should at
any time agree with, and no others, from time to time and at all times during
the term of years therein expressed, should and lawfully might make, use,
exercise, and vend, within England, Wales, and the Town of Berwick-upon-
Tweed, the Islands of Jersey, Guernsey, Alderney, Sark, and Man, and also in
all Her Majesty's Colonies and Plantations abroad, our Invention of "CERTAIN
IMPROVEMENTS IN LOCKS AND LATCHES, AND IN IRON ROOMS, DOORS, SAFES, CHESTS,
AND OTHER REPOSITORIES;" in which said Letters Patent is contained a proviso,
that we, the said Edward Tana, senior, Edward Tann, junior, and John
Tann, or some or one of us, shall cause a particular description of the nature
of our said Invention, and in what manner the same is to be performed,

page_text: to be inrolled in Her said Majesty's High Court of Chancery within six
calendar months next and immediately after the date of the said in part
recited Letters Patent, as in and by the same, reference being thereunto had,
will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, we, the said
Edward Tann, senior, Edward Tann, junior, and John Tann, do hereby declare
that the general nature and intention of our said Invention consists in or has
reference to the principle of construction and action, with the modes of arrange-
ment of the mechanical parts, and the several combinations thereof, as herein-
after described, applied to the forming and making, in an improved and more
efficacious manner than heretofore the same has been done, locks and latches
of security; and in the particular construction, the mode of fitting, and the
preparation of safety and fire-resisting chests, rooms, and other repositories of
security against the destructive effects of fire and of surreptitious attempts to
open such locks and latches, or such safety and fire-resisting chests, rooms,
and other repositories; and also in the particular application of such locks and
latches of security against surreptitious opening; to such safety chests, rooms,
and other repositories of security against the destructive effect of fire; and we
hereby further declare that the following detailed Specification, with reference
to the accompanying illustrative Drawings (which Drawings we declare to
form and be part of the said Specification), does truly describe and set forth
our modes of carrying the aforesaid several parts of our said Invention into
practical effect, that is to say:-
We declare the particular and practical nature and intention of our said
Invention to be the construction and the mode of fitting and preparing such
aforesaid safety and fire-resisting chests, rooms, and repositories of security, as
render them fire-proof as regards their interior area, chambers, or receptacles;
such said construction, and the mode of fitting and preparing the same,
consisting,―
Firstly, in the adaptation of an outer body or double body to the outer
side of a second or inner body of the said safety and fire-resisting chest or
room, and having its several sides each at a small distance from the cor-
responding sides of the second or inner body respectively, thus forming empty
spaces or cavities between them.
Secondly, in that having thus provided such empty spaces or cavities so
surrounding the said second or inner body, between itself and the enclosing
outer or double body, that such spaces or cavities are afterwards closely filled
up with a composition and mixture of certain chemical matters and substances

page_text: with certain other substances, being non-conductors of heat (both of which are
herein-after described).
Thirdly, in constructing a third and interior casing or lining to the aforesaid
second or inner body, and formed of wood or of any of the known non-conductors
or imperfect conductors of heat, and having its outer side also placed at a
small distance from the inner side of the aforesaid second body, so as to
provide other empty spaces or cavities surrounding such third and interior
casing and lining between itself and the aforesaid second body, which said
empty spaces or cavities are also afterwards closely filled up with the same
composition and mixture of chemical with non-conductors or imperfect
conductors of heat, as already herein-mentioned as used to close and fill up the
empty spaces or cavities surrounding the second or inner body, as aforesaid;
and such interior casing or lining, being so constructed and arranged, forms the
immediate place of deposit for the valuables to be placed for security therein;
and being so protected by the surrounding composition and mixture of
chemical matters and substances, and other substances being non-conductors
or imperfect conductors of heat, as aforesaid, books, papers, and documents of
similar combustible and delicate character are effectually protected from being
burned, charred, or scorched, even should the outermost metal body of the chest
or room be heated to a white heat.
Fourthly, in the application of an outer door, to close and secure the afore-
said outer body, constructed and formed of the same fire-proof character as the
aforesaid outer body of the safety and fire-resisting chests, rooms, and
reposities in respect to such fire-proof security; and also of a peculiar
construction effecting and producing a perfect mechanical security against
surreptitious attempts to open the same by false keys or otherwise.
Fifthly, in the production and application of a composition and mixture of
certain chemical matters and substances with other substances, being themselves
and per se non-conductors or imperfect conductors of heat, and in such com-
position and mixture (the same being as herein-after particularly described)
being applied and used to close and fill up the empty spaces and cavities
aforesaid; such said composition and mixture being fusible under high degrees
of heat, such as would char, scorch, and destroy the combustible contents of
ordinary iron and safety chests, and which, by the process of such fusion,
neutralises a considerable portion of the heat received by the outer and exposed
chest or body, and in such fused state then possessing an increased power of
resistance to the conducting and the transmission of heat, and also in such
fused state closing and filling the empty spaces and cavities produced and

page_text: provided in the construction more completely and effectively than when in the
original or infused state.
Sixthly, in the principle of construction, and the peculiar modes of arrange-
ment of the mechanical parts, and the several combinations of such constructions
of lock and latches of security applicable to the aforesaid safety and fire-
resisting chests, rooms, and repositories, and also in the mode of applying and
fixing the same on such safety and fire-resisting chests, rooms, and repositories,
in manner as herein-after described; the practical result of such construc-
tions and combinations of mechanical parts being the manufacture of locks
and latches of security, which we apply thereto, and which are more perfect
than locks and latches of security hitherto made, both in their character of
inserutability or safety from surreptitious attempts to open the same by the
means of false keys or otherwise, and also in their character of firmness and
strength effectually to resist forcible entry or breaking into, and further also
affording a more commodious use and management thereof.
The following is a detailed Specification of our modes of carrying into
practical effect the objects of our said Invention as herein-above set forth, and
the Specification has reference to the accompanying illustrative Drawings,
respectively marked Drawing No. 1, Drawing No. 2, Drawing No. 3, that is
to say:-
The Drawing No. 1 contains, in eleven separate views, representations in
geometrical plans and sections of our aforesaid safety and fire-resisting chest,
exhibiting the construction of its several component parts, shewn as when
separated from each other, in order to shew their mode of combination and
fitting or putting together to compose the said safety and fire-resisting chest in
its complete state, and to explain the resulting effect in its mode of action.
The Drawing No. 2 contains, in twenty-five separate views, representations
in geometrical plans and sections of our aforesaid lock of security, having its
several component parts shewn as when separated from each other, in order to
shew the form of each such part respectively, and the mode of combination
thereof to compose the said lock in its complete state, and also to illustrate
and explain the principle of its construction, and the resulting effect in its
mode of action..
The Drawing No. 3 contains, in twenty-five separate views, representations
in geometrical plans and sections of our aforesaid latches of security, having
their several component parts shewn as when separated from each other, in
order to shew the particular form of each such part respectively, and the mode
of combination thereof to compose the said lock of security in its complete

page_text: the resulting effect in its mode of action.
DESCRIPTION OF THE DRAWING, No. 1.
This Drawing has all its separate Figures drawn to a scale of three inches
to one foot. The Figure 1 represents a view of the upper side or top of the
aforesaid safety and fire-resisting chest, in which A, B, C, D, are the upper
edges of its outer body; E, E, two of the edges of the second or inner body;
F, F, its lid, moving in an upward and outward direction on the joints G, G;
H marks the escutcheon of the lock, sunken below the general surface of the
upper face of the lid; I, the handle, by which the lid is raised. Figure 2
represents the plan or horizontal upper view of the outer body of the chest,
A, B, C, D, marking the upper edge thereof, as in Figure 1; E, E, its cavity,
or entire area, in which the second or inner body is placed; and V, a metal
cover, placed over an outlet from the spaces left between the outer and the
second bodies for a purpose herein-after explained. Figure 3 is a transverse
vertical section, taken through the Figure 2, in the direction of the line X, X.
Figure 4 represents a top or horizontal view of the inner or second body of
the chest, in which E, E, marks its upper edges, as in the Figure 1; F, F, is
the inner side of the lid, the lid being thrown open; and G, G, a metal frame,
attached to its inner side, enclosing a hollow space at H, H, which is closed
and filled with the aforesaid composition and mixture of chemical with non-
conducting substances; I is a plate, screwed upon the front of the frame G, G,
to secure and hold such application of the composition in its place. A portion
of the plate I is shewn in this Figure as if broken off, to shew the application
of the composition K in the inner part of the body. E, E, is a second lid or
cover, hung upon the joints e, e; this lid closes upon the interior casing or
chamber which forms the receptacle for the deposits in the chest; L is the
escutcheon of the lock of security of this interior chamber, and M is a lifting
ring, for opening the lid. The lid is represented in a cross section at the
Figure 5, against the adjoining, Figure 6. As in the Figure 4, H shews the
composition with which the hollow space of this lid is filled; I, its upper or
outer iron plate; and i, i, i, an inner lining or casing of wood. The Figure 7
is a cap or cover, which is applied over the plate I of the Figure 4, to hold the
lock of security in its place. C, D, are pieces attached to the inner side of the
cover, on them the lock is screwed; A, B, is the inner surface of the cover;
and C, D, are openings cut in the edge sides of this cover, to admit the passage
of the double-armed bolt; and E a projecting piece, which serves to give addi-
tional holding and security to the lid, when it is closed, by then entering into a

page_text: corresponding recess or socket, seen also at L* in the Figures 8 and 9; F is
a view of the edge C, D, of this Figure, in which C and D represent the
openings for the passage of the double-armed bolt of the lock. Figure 8 is a
vertical section of the chest and its lid, as shewn in the Figure 4, taken in the
direction of the line X, X, in which the several parts seen in the Figure 4 are
respectively marked with the same letters of reference. H, H, represent the
portion of the composition with which the inner lid of the interior receptacle
K is filled. In the lid F, F, of the second body, H, H, also marks the com-
position applied to fill the hollow space of that lid; O, O, marks the com-
position applied to fill and close the hollow space on each vertical side of the
chest; and P the portion of composition with which the hollow space beneath
the interior chamber is filled and closed; Q and R are two compartments of
the interior chamber, which is formed or lined with wood, as designated in the
Figure at V, V, V ; S is the sunken portion of the escutcheon of the lock.
The Figure 9 represents a longitudinal vertical section of the Figure 4, taken
in the direction of a line drawn through Z, Z, of that Figure, in which the
several corresponding parts are marked with the same letters of reference
respectively. H, O, O, and P, respectively designate the portions of the com-
position filling the spaces about the several sides of the body, W, W, W,
marking the sides of the body, and W*, W*, W*, W*, are edge plates, pro-
jecting from the sides of the inner body, and by which it is kept at the proper
distance from the outer body, to allow sufficient space for the necessary quan-
tity of composition to be used in filling up the space thus provided between the
inner and the outer bodies. The Figure 10 represents a horizontal section of
the Figure 9, taken in the direction of the line Y, Y, in which also the several
corresponding parts are respectively marked with the same letters of reference.
The Figure 11 represents a horizontal section of the Figure 9, taken in the
direction of the line Y, Y, having all the same parts that are shewn in the
Figure 10, with the addition of the horizontal edge view of the outer body
drawn in the Figure 2.

page_text: to shew the form of each separately, and to explain more distinctly their com-
bination, or the order in which they are placed as regards each other, and the
fixed and the acting or moveable parts of the lock. The Figure 2 is an edge
view or profile of the Figure 1, as it would be seen from its upper side in the
Figures. In the Figure 1, A is a sliding bar, which has a direct and easy
back and forward sliding motion, in the direction of its length, on the fixed
stubs or pins B and C, guided by the slots D and E, which move freely on B.
F is a bolt or lever, which we term the reliance bolt; this is lightly hung, so
as to move easily on a fixed centre pin G. At its opposite extremity it has a
crotch or hook H, and at I an upright standing cross bar, fixed at right angles
to the length of the bolt; the upper extremity of this is shaped as in the
Figure, and works against a pallet k, at the extremity of a short spring K
fixed at K*. The crotch or hook H is by the action of one of the levers made
to drop into the notch L of the sliding bar A, by the pressure of the spring
K, K. Two springs M, M*, fixed at their lower extremeties, as shewn in
the Figure, hold two sets of working levers to their required action. N is the
pin which receives the pipe of the key. The Figure 3 is a plan or direct view
of the outer or front side of the box of the lock, being the front plate described
under the Figure 1 as being removed, in order to shew the interior of the box.
X, X, X, X, in the Figures 1 and 2, shew the screw holes by which the box
of the lock is attached to the lid of the box Y, Y, Y. In the Figure 3 are the
countersunk holes, to receive the screws by which the front of the box is
attached to its back plate, answering to the corresponding holes Y, Y, Y, in
the Figure 1. In the Figure 3, B shews the key applied to its place. The
Figure 4 represents an edge view or profile of the edge C, C, of the Figure
3, corresponding parts being marked with the same letters. Figure 5 is
an edge view or profile of the side D of the Figure 3. Figure 6 repre-
sents a sliding plate, which is the first placed on the square stub S of the
Figure 1, by its corresponding opening, shewn in Figure 6, and which attaches
it to the sliding bar A of Figure 1, and which is repeated in this Figure;
corresponding parts are respectively marked with the same letters of reference
in both these Figures. The reliance bolt I, F, II, is here repeated, and is
seen engaged in the notch of the plate at L. The pierced lever shewn at
Figure 9, is the first placed on the stud B, by its corresponding aperture B;
the pierced lever at Figure 10 is next placed on the stud C, also by its
aperture C; next, the pierced lever, Figure 11, is placed in the same way
on the stub C, also by its aperture C; and next, the lever, Figure 12, is placed
on the stub. The lever, Figure 13, is next placed on the stub B, and then the
lever, Figure 14, is placed on the stub C. The profile Figures or edge views,

page_text: placed above and immediately contiguous to the representation of each of these
Figures, shew the configuration of each of these levers, in their thickness or
depth, and so explain the mode in which they are applied over each other; the
whole number of these levers, combined in the manner above described, is
shewn in Figure 8, where the several levers as far as they can be seen in the
Figure, are respectively marked with numeral figures in the order in which
they have been described and are placed. The Figure 7 is a profile view of
the entire combination shewn in plan in the Figure 8, having each lever
respectively numbered to correspond with the representation of the same lever
in the Figure 8. In Figure 8, the reliance bolt F, I, H, is seen engaged in
the notch L of the bar, shewn at Figure 6, and also in a corresponding notch
in each of the levers, Figures 10, 12, and 14. The action of the lock is as
follows: The key being applied to its pin N, it operates by its configuration
on the lower edges of the wards of the lock, which are formed by the shapes
and the combination of the differently formed levers above described, and the
lock is complete. If a surreptitious attempt be made to open the lock with a
false key or other instrument, the configuration of the false key or instrument
used not strictly agreeing with the character of the levers in their peculiar
combination, the upright piece I of the reliance bolt passes the extremity of
the small spring K, k, and its crotch H engages in the lever, Figure 10, 12,
and 14, when the action of the lock is immediately and entirely stopt, and it
cannot be opened. The possessor of the true key introduces it, and turning
it in the reverse direction to that employed for opening the lock, or from
the right hand towards the left hand, the form of the notch in which the
crotch H is engaged, with the form of the crotch itself, acts to disengage it,
and cause the upright piece I to pass on the other side of the point k
of the spring; the disengagement being thus made, if the key be turned
from the direction of the left hand towards the right, the lock being now
in correct and free action, it is opened. The upright springs M and M* hold
the levers to the requisite precision of action. Figure 16 is a side view or
elevation of the key, in which all its wards are shewn, with their application
to the pierced levers, which are shewn in section in the Figure, and engaged
in the key. The piece ✗ of this Figure is an end view of the key. The
Figures 17, 18, and 19, are separate views of the small spring K, k, explaining
its figure, 17 being its side elevation; 18, its plan view; and 19, an end
elevation of the same. Figures 23, 24, and 25 are similar views of the large
side springs M. and M*; the Figures 20, 21, and 22 are respectively views
in side elevation, in plan, and in front elevation.

page_text: Contains, in separate views, representations in geometrical plans and edge views of
the several component parts of our aforesaid latches of security, the Figures being
drawn of the full size. Figure 1 is a plan view of the inner side of one of our
latches; A, B, is the back plate, and C, C, C, edge plates, forming the box of
the latch; D is an upright lever, hung upon the box by the stub E, receiving
on the stubs E, G, and H, the pierced levers or latch pieces shewn in the
Figures 6, 12, 8, and 9; and in combination and combined action therewith,
applied on the stub F, and hung on the centre pin G, the pierced levers or
latches shewn in the Figures 7, 13, 10, and 11 are placed; and on the studs E
and F is placed the lever, Figure 6, immediately upon which are placed in
succession the levers marked Figure 12, Figure 8, and Figure 9, as they are
partially seen in plan in Figure 2, and altogether in section in Figure 4,
laying in the order of the numeral figures thereon, placed next on the centre
stub or pin H, and the square-headed stub G, are placed in succession; the
levers seen at Figures 7, 13, 10, and 11, the key is applied to its pin at I, and
acts directly by the configuration of its wards on the curved lower edges of the
levers B, and those situated below it, as above described. These levers act
upon the undermost edges of the sliding lever A, and those latches situated
below it throwing the extremity K of the lever A, and those situate below it
forcing them into the channel L, and engaging the latch in its box; the
spring M acts by its tension to maintain the steadiness and precision of
action of these levers and latches.
The Figure 4 is a transverse section of these combinations, in which the
levers are respectively marked with the same numeral figures that mark them
in their separate Figures, as above described. A profile Figure is placed im-
mediately above each of the Figures 6, 7, 8, 9, 10, 11, 12, and 13. Figure 3
is a profile view of the Figure 1.
Figure 14 shews another modification of our latch of simple form, in which
the arrangement and combination is manifest by reference to the separate
Figures, and the Figures 14 and 15, in which the whole combination is shewn
inserted in the latch and ready for action.
The Figure 16 shews an edge view of the Figure 14, and the Figure 17 a
separate view of the key of this latch. The latch shewn in the Figure 14, we
term our perpendicular lifting latch. The latch shewn in the Figure 2, we
term our perpendicular lock latch.
At the Figure 25 is shewn two views of the spring M of Figure 1.

page_text: The composition and mixture of chemical matters or substances with other
substances being imperfect conductors of heat, and the mode of applying the
same, we thus describe and set forth. We take ground allum, finely sifted,
and Austin's cement or gypsum, also finely sifted; we mix either of the latter
substances, in equal quantities with the ground and finely sifted alum, in an
iron vessel, and then expose it to a heat sufficient to produce liquifaction and
ebullition of the mass; it is necessary that the mixture should be constantly
stirred during the heating, and when it is thus liquified and heated, the mix-
ture is in that state poured into a flat iron tray to cool, it is then in a caked
and compact form, and is to be coarsely pounded when required for use.
The chamber and empty spaces are to be carefully filled and pressed or
rammed down, and when the mass is heated by the exposure of the chest to the
action of the fire, the composition liquifies and completely fills the smallest
fissures in the work, and becomes greatly more compact and dense than before
such fusion. Its power of resistance to the transmission of heat is by its
fusion greatly increased, and it emits no steam.
The apertures described as being provided on the outer body of the chest in
the Figures 2 and 3 of Drawing No. 1, are for the purpose of ventilation or
affording the means of escape for the heat held by the composition. This
composition and mixture is what we prefer in practice, but any non-con-
ductors of heat may be used with useful effect; as, for alum, there may be
substituted the following substances:-Sulphate of potash, muriate of ammonia,
borax, impure potash, nitrate of soda, soda in cake, pearl ash, or any of the
known alkalies.
We declare that we claim as of our Invention, as regards the said composi-
tion and mixture for filling the spaces between the several bodies of our safety
and fire-resisting chests, rooms, and repositories, the combination herein stated,
having the property of liquifying under exposure to high degrees of tem-
perature, without steam or expansion prejudicial to the safety of the apparatus
to which we apply it, and possessing in its fused state an encreased power of
resisting the transmission of heat, and also our modes of arrangement for the
application of the same, as we have herein specified and set forth.
We declare that we claim as of our Invention, the construction and adap-
tation of compound and double or triple bodies or cases, placed one within the
other in succession, leaving separating spaces between the contiguous bodies,
and closing and filling such spaces with the heat-resisting composition, herein
described, and these arrangements and constructions as herein specified.
We further claim as of our Invention, the improvement in locks and latches

page_text: of security, by and through the constructions and combinations as we have
herein described them in this our Specification, and as we have set them forth
in the accompanying Drawings.
In witness whereof, I, the said Edward Tann, senior, have hereunto set
my hands and seal, this Twenty-fifth day of May, in the year of our
EDWARD (L.s.) TANN, Sen'.
AND BE IT REMEMBERED, that on the Twenty-fifth day of May, in the
year of our Lord 1844, the aforesaid Edward Tann, senior, on behalf of
himself and the within-named Edward Tann, junior, and John Tann, came
before our said Lady the Queen in Her Chancery, and acknowledged the
Specification aforesaid, and all and every thing therein contained and specified,
in form above written. And also the Specification aforesaid was stamped
according to the tenor of the Statute made for that purpose.
Enrolled the Twenty-fifth day of May, in the year of our Lord One
thousand eight hundred and forty-four.

page_text: DISCLAIMER AND MEMORANDUM OF ALTERATION proposed
to be entered by the said Patentees with the Clerk of the Patents of
England, according to the Statute in that case made and provided.
WHEREAS, in our said Specification, we, amongst other things, claimed the
making iron rooms, doors, safes, chests, and other repositories, with spaces for
receiving non-conducting matters or substances, and we have since found that
that part of our Invention is not new, for which reason we wish to disclaim,
and we do hereby disclaim, all parts of the said Specification which describe
and claim the making of such articles with separate spaces between the con-
tiguous bodies. And we did, amongst other matters or substances, also describe
and claim the use of "muriate of ammonia," also "impure potash, nitrate of
soda, soda in cakes, pearl ash, or any of the known alkalies;" and we have found
that such matters or substances are not useful for such purposes, for which
reason we wish to disclaim, and we do hereby disclaim, all parts of the said
Specification, which describe or claim the use of such matters or substances.
And we have, since the enrolling of our said Specification, been advised that
the following paragraph, which occurs near the end of the said Specification,
viz:"Its power of resistance to the transmission of heat is by its fusion
greatly encreased, and it emits no steam," is not strictly correct, for which reason
we wish to alter, and we do hereby alter, the said Specification, by striking out

page_text: the words "and it emits no steam," and we also for the same reason strike out
the words "steam or," where it occurs in the subsequent paragraph.
In witness whereof, we, the said Edward Tann, senior, Edward Tann,
junior, and John Tann, have hereunto set our hands and seals, this
First day of December, in the year of our Lord One thousand eight
hundred and fifty-one.
To the Clerk of the Patents of England.
This is to certify, That the above-named Edward Tann, senior, Edward
Tann, junior, and John Tann, of Minerva Terrace, Hackney Road, in the
County of Middx., Iron Safe Manufacturers, have applied to me for leave to
enter with you the above-written Disclaimer & Memorandum of Alteration of
part of the Specification of a certain Invention, for which Letters Patent were
granted to them under the Great Seal of Great Britain, dated at Westminster,
the 25th day of Nov, 1843, and to which a Specification was duly enrolled;
and on considering the said application, I directed them to advertise their said
Disclaimer & Memorandum of Alteration in the Times and Morning
Chronicle newspapers, and in a Liverpool newspaper, and such advertisements
having been published, viz., in the Times on Nov 3d, 1851, in the Morning
Chronicle on the 1st of Nov 1851, and in the Liverpool newspaper, the
Albion, Nov 3d, 1851, and no valid opposition having been made to
the same, I hereby grant leave to the said applicants to file their said Dis-
claimer & Memorandum of Alteration, pursuant to the Statute passed in the
fifth & sixth years of the reign of His late Majesty King William the
Fourth, entituled "An Act to amend the Law touching Letters Patent for
Inventions."
Lincoln's Inn, Nov 29th, 1851.
W. P. WOOD.

page_text: AND BE IT REMEMBERED, that on the First day of December, in the
year of our Lord 1851, the aforesaid Edward Tann, senior, Edward Tann,
junior, and John Tann, came before our said Lady the Queen in Her Chancery,
and acknowledged the Disclaimer aforesaid, and all and every thing therein
contained and specified, in form above written. And also the Disclaimer
aforesaid was stamped according to the tenor of the Statute made for that
purpose
Enrolled the Second Day of December, in the year of our
thousand eight hundred and fifty-one.
Lord One