MEMORANDUM OF ALTERATION, AND DISCLAIMER AND MEMORANDUM OF ALTERATION
Year: 1833

page_text: BERRY'S SPECIFICATION, MEMORANDUM OF ALTERATION,
AND DISCLAIMER AND MEMORANDUM OF ALTERATION.
SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MILES
BERRY, of 66, Chancery Lane, in the County of Middlesex, Civil Engineer,
send greeting.
WHEREAS His present most Excellent Majesty King William the
Fourth, by His Royal Letters Patent under the Great Seal of Great Britain,
bearing date at Westminster, the Fifth day of October, in the fourth
year of His reign, did, for Himself, His heirs and successors, give and grant
unto me, the said Miles Berry, His especial licence, full power, sole privilege
and authority, that I, the said Miles Berry, my executors, administrators,
and assigns, or such others as I, the said Miles Berry, my executors,
administrators, 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
mentioned, should and lawfully might make, use, exercise, and vend,
within England, Wales, and the Town of Berwick-upon-Tweed, an Invention
of CERTAIN IMPROVEMENTS IN THE CONSTRUCTION OF WEIGHING MACHINES,"
being a communication from a Foreigner residing abroad; in which said
Letters Patent is contained a proviso obliging me, the said Miles Berry,
to cause a particular description of the nature of my said Invention, and in
what manner the same is to be performed, to be enrolled in His said

page_text: 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, I, the said
Miles Berry, do hereby declare that the nature of the said Invention, and
in what manner the same is to be performed, are particularly described
and ascertained in and by the following description thereof, reference being
thereto had and to the Drawings hereunto annexed (that is to say):
These improvements in the construction of weighing machines apply
to that particular kind of apparatus called platform weighing machines,
and which may be employed for weighing either light or heavy goods.
They may be either erected as stationary engines for weighing goods in
warehouses or loaded carriages passing along roads, or they may be made
portable for ordinary commercial or domestic use.
The improvements consist in a new arrangement of compound levers
and of the positions of the fulcrums or pivots on which they vibrate, with
suitable graduations upon the index beam, and a simple mode of adjusting
the apparatus or compensating for any expansion or contraction of the levers
from variation of temperature.
In the accompanying Drawing, Figure 1, Sheet 1, represents a plan
. or horizontal view of one of these improved machines, intended to be fixed
in the floor of a warehouse or in a roadway. Figure 2 is a corre-
sponding plan or horizontal representation in which the platform is removed
for the purpose of exposing the levers and other internal parts to view.
Figure 3 is a side elevation of the machine complete, similar letters
indicating corresponding parts in all the Figures. A, A, is the interior
framework made of timber or other suitable material. B, B, are two sills
.or beams extending lengthways of the machine, sustaining the framework
to which they are attached. C, C, are two transverse bars of wood or metal
which are called rockers, the levers D, D, being firmly attached thereto.
These rockers bear and vibrate upon four knive-edged fulcra on the tops of the
standards E, E, which are supported by the sills B, B, one of these standards
or fulcra being represented in perspective on a larger scale in the detached
Figure 4. A recess is formed in the top part of each standard, which may be
made of hardened steel, cast iron, or other metal, to prevent its wearing away.
F, F, are the bearing arms affixed to the rockers, by which they vibrate upon
the standards. One of these is also seen in the detached Figure 4 with its
knife edge bearing upon the standard E. The projecting part G, on the upper

page_text: side of each of the arms F, also forms a knife-edge support or fulcrum upon
which the pieces of steel, cast iron, or other metal H, at the under side of the
platform, are supported. The parts I, I, see Figure 5, are excavations made
in the under side of the platform timbers to enable it to play free from the
end of the arm F, which rises immediately above the standard. J, J, are
braces extending from the rockers to the levers to keep them in the proper
positions. The pivots or fulcra made in this way are considered not only to
be superior in strength, compared with those usually employed, but their points
of bearing, from the manner in which they are connected, will always remain
at the same distance from each other, and the load will also present the
same relation to the power, the bearing edges uniformly preserving their
general horizontal range. The middle fulcrum, or point of suspension seen
at K, will be best explained by reference to the detached Figure 6. The
part a is made fast to the lower side of the lever D, and the part 6 to the
upper part of the lever D*, the double or connecting hook c embracing the
knife edges on both a and b. Figure 7 is a perspective view of the upper of
these knife edges, or the one fixed on to the lever D*, and which is seen
in section in Figure 6. The end of the lever D* extends under the edge of one
side of the frame, where it is connected with the balance or steelyard hereafter
described. In the elevation, Figure 3, the lever D is seen connected to the
rod L, the lower end of which, in the form of a hook, passes under a knife
edge at the end of the lever. The hook is seen in the detached Figure 8,
and the staple on the end of the lever, of which the knife edge forms a part,
is shewn at Figure 9, but in a reversed position. It is shewn in its right
position in Figure 10. This staple is fastened on to the under side of the
lever D by the screw and nut n, which admits of its being adjusted to its
place with precision. In order to prevent that thrust or swing of the platform
to which it may be subjected by drawing a load on to it, or by shifting it when
placed thereon, jointed rods, chains, or links are attached to the end pieces
of the frame, which rods, chains, or links have hooks or loops upon their ends
adapted to pass into staples, or into pieces affixed for that purpose on the
under side of the platform. Four should be employed, and when hooked or
looped they should have a slight play, so as not to bind the platform, but to
allow it to descend the slight distance required in weighing; at the same time
they must prevent its striking or rubbing against the frame. By placing these
rods alongside of the timbers or beams upon which the planks of the platforms
are fixed (which timbers usually run lengthwise of the machine) the lateral
thrust also is checked.
The improved mode of graduating and adiusting the beam and weights

page_text: is as follows: The balance is of the steelyard kind, as represented at M,
Figure 3. The arm has divisions upon, and a moveable poise and hook, made
in the usual way, upon a rod N, suspended on a knife edge. At its extreme end
different weights may be placed, which must be adapted to that of the article to
be weighed. We may now suppose the beam of the balance, with its moveable
poise, to be so graduated and proportioned as to weigh any number of pounds;
from one to a hundred, then the weights to be placed upon the rod N are to be
of such size that they may respectively weigh one hundred, two hundred, five
hundred, one thousand, or any other number of pounds, hundreds, or tons,
as the case may be. The moveable poise will then give the means of ascer
taining the number of pounds, up to one hundred, &c. which the weight of the
article may exceed that indicated by the even hundreds upon the rod N.
These numbers are given merely for the purpose of exemplifying the principle
upon which the weights are graduated, and to render apparent its applicability
to others of any required amount or proportion. For the purpose of obtaining
an exact counterpoise to the platform, and bringing the beam into the due
horizontal position, a rod or bar e with a screw cut thereon, and a cylindrical
or other formed weight f, with a female screw passing through its centre, is
placed thereon. The screw e extends along and is parallel to the beam, or
rather to a line uniting the points of suspension. By turning the weight f
so as to move it along the screw, the beam and platform may be equipoised
with the utmost precision. When the screw rod is placed upon that part of
the beam represented in the Drawing, the arms by which it is attached to the
graduated part of the beam are bent or curved out of the way of the hook of
the moveable poise; but the opposite end of the beam may be lengthened, so
as to allow the regulating weight to be placed thereon, where it will be
entirely out of the way of the graduations, or it may be placed on other parts of
the beam. If it should be found desirable to allow the standards to oscillate
in a small degree to accommodate themselves to the movement of the rockers,
that may be effected by attaching the standards to the sills by a joint having
a small extent of action.
When these improved weighing machines are constructed for the use of
warehouses, stores, &c., for the general purposes of weighing merchandize,
the form of the apparatus and the direction of the levers may be modified in
such a way as to render it in some respects more convenient than the one just
described.
:
The accompanying Drawing, Sheet 2, will serve to exemplify this kind of
modification.
Figure 1 is a plan of the machine with the platform in its place. Figure 2,

page_text: a view of the under side of the platform. Figure 3, a plan of the machine
when the platform is removed. Figure 4, a lateral view, the outer parts or
casing being removed to exhibit the general arrangement. Figure 5 shews a
section of the box and the frame which surrounds it, to receive the platform.
Figure 6 is a detached representation of the knife-edge suspension at the
junction of the levers. Figure 7 is a similar view of the joint, which is bolted
to the rocker, and which is suspended from the frame surrounding the platform
by a knife-edge suspension, instead of bearing upon a standard, as in the former.
arrangement. In each of these Figures the same letters are employed to desig-
nate similar parts. A, A, is the platform, with strips of iron B, B, upon its edges.
C, C, are parts of the frame surrounding the platform, which can be removed.
by taking out the screws a, a, for the purpose of adjusting and fixing the rods
for preventing the thrust of the platform. D, D, are the rockers, upon one
of which is fixed the two short levers E, E, and upon the other the two longer
levers F, F, each pair acting as single levers upon the rockers D, D. Near
their ends are bolted the bearing pieces G, G, having knife edges, shewn at
Hin Figure 7; upon these the parts I, I, of the platform rest. As one of
the rockers is placed lower than the other, the bearing pieces I, I, vary in
their length, so as to be adapted to the projecting knife edges H the
bearing pieces G. The parts I, I, are best made of cast iron chilled on the
face. The mode of forming the knife-edge bearings at the junction of the two
pairs of levers J, J, as shewn in Figure 6, one piece K, with its knife edge,
being attached to the shorter, and another L to the longer levers, and a ring.
M being substituted for the double hook c in the first-described machine.
N, N, are the heads of the rods and rings which form a part of the knife-edge
suspension of the hinges on the rockers. The rod O leading from the ends
of the double lever F, F, to the balance has its suspension formed in the manner
before described. The machine is intended to be let into the ground so that
the platform may stand level therewith, and it may be so placed that the rod
leading to the balance may pass up under a counter or otherwise, as may be
preferred.
upon
In Sheet 3, the modification represented is adapted to be used as a portable
scale, the outer frame being cast in one entire piece.
"
Figure 1 shews the machine in perspective, the pillar P which sustain the
balance and its appendages, and through which the suspension rod passes
perpendicularly to the levers, is connected to the machine by bolts and screws.
Figure 2 represents a cast-iron frame or case A, shewing the double levers
E, E, and F, F, the platform being removed. This iron frame is placed upon

page_text: and fastened by screws to its counter part, made of wood, and which forms
the bottom part of the case.
Figure 3 represents the machine with the platform in its place, the dotted
lines representing the rods for preventing the lateral thrust or swing, which
are fastened to the timber Z in the middle of the machine.
Figure 4 is a view of the under side of the iron frame and the levers, the
machine in this Figure being inverted. The levers are of cast iron, and
each double lever with the rocker is one piece of casting, the pivots or knife-
edge joints being of steel, and projecting laterally, as at c, c, to receive the
bearing pieces upon the platform. The mode of connecting the levers is the
same as that described in Figure 6, Sheet 2.
Figure 5 is a side view of the double lever F, F, shewing the manner of
suspension by means of loops and. staples riveted to the iron frame at each
corner.
In adapting this improved construction of machines to the purpose of
weighing boats or barges with their cargoes in canal locks, it is only necessary
to extend the arrangement of double levers and rockers under a platform of
sufficient length to support the boat or barge. Figure 6, Sheet 3, exhibits a
Diagram of an arrangement suited to this purpose. a, a, a, are the rockers;
b, b, b, the longer double levers; c, c, c, the shorter levers bearing upon the a
fulcrum, as described in the preceeding Figures. The outer ends of the
levers b, b, are connected by knife-edged fulcrums to a cross lever d, from the
centre of which the rod leading to the index is connected.
The points which are claimed as new, and as improvements upon the platform
weighing machines hitherto used, are the following:-The construction of that a
part of the machine denominated the rocker, with the manner of arranging the
levers and attaching them to the rockers; the manner of constructing the joints
with their knife edges, and of allowing that part of the joints called the standard E
to vibrate, for the purpose herein-before described; the use of the adjustable
weight upon any part of the beam of the balance for the purposes described. 3
It is manifest that the improved combination, consisting of the platform, its
levers, and joints, may be employed in connection with a balance constructed
and graduated as in the ordinary weighing machines, and that the balance
with its adjusting piece, constructed and graduated upon the principle herein
described, may be applied to other weighing machines. These combinations 3
therefore are claimed both conjointly and separately; and I do hereby declare
that I do not intend to confine myself to the exact form of constructing the
various parts of the machine shewn in the Drawings, but allow myself tho

page_text: right to vary the same as may be found convenient in any way which may
produce similar effect by the application of the same principles.
In witness whereof, I, the said Miles Berry, have hereunto set my hand
and seal, this Fifth day of April, in the year of our Lord One
thousand eight hundred and thirty-four.

page_text: In the Matter of a Patent granted to Miles Berry, of 66, Chancery
Lane, in the Parish of Saint Andrew, Holborn, and County of
Middlesex, Patent Agent and Civil Engineer, for an Invention of
"CERTAIN IMPROVEMENTS IN THE CONSTRUCTION OF WEIGHING
MACHINES," bearing date at Westminster, the Fifth day of October,
One thousand eight hundred and thirty-three.
MACHINES," bearing date at Westminster, the Fifth day of October,
One thousand eight hundred and thirty-three.
MEMORANDUM OF ALTERATION OR AMENDMENT entéred by
the said Miles Berry, with the Clerk of the Patents of England, pursuant
to an Act passed in the fifth and sixth years of His present 'Majesty's
reign, intituled "An Act to amend the Law touching Letters Patent for
Invention."
I, the said Miles Berry, do hereby declare that since the inrolment of
the Specification of the said Patent I have discovered that there is a slight
omission in the Specification or description of one modification of the said
weighing machines, which ought to be supplied to render the construction
and operation of the same more perfect and intelligible. And I am therefore
desirous of supplying such deficiency in the manner following (that is
to say):
After the description of the modification of the said weighing machines
shewn in Sheet 2 of the Drawings, I would introduce the following:
"would here remark, in order that the various bearings and connections
"shall not be injured by the friction caused by placing heavy goods upon
"the platform and removing them after they have been weighed, the steelyard
"M is to be suspended from the shorter end of a lever placed above it on the
"head of the standard, whereby the steelyard M, rod o, levers F, and
"platform A may, when required, be suspended or brought into the weighing
positions; or the lever F and rocker D may be dropped away from contact
"with the platform, and its edges allowed to rest on the sides of the case C
"while heavy goods are being put on or taken off; at this time the longer
"arm of the upper lever would be elevated, and the bearings G, G, of the
levers F and roller D be dropped away from the legs I, I, the edges of
"the platform resting upon the sides of the case C, as shewn in Figure 1.
"When the goods are being weighed the longer arm of the upper lever
"is to be drawn down and held by a catch, whereby the levers, platform,

page_text: "and goods will be brought into the weighing position, and after weighing
"the longer arm of the upper lever is released from the catch, when the
edges of the platform will again rest on the sides of the box or case, and the
goods may be removed without injury to the bearings."
"
And further, in the claim of Invention to the said Specifications I would
introduce the letters of reference D and D, F and E, after the word "levers"
in the following sentence:-"The construction of that part of the machine
"denominated the rocker, with the manner of arranging the levers D and D*,
"F and E, and attaching them to the rockers."
In witness whereof, I, the said Miles Berry, have hereunto set my hand
this Twenty-first day of July, One thousand eight hundred and thirty-

page_text: In the Matter of a Patent granted to Miles Berry, of 66, Chancery
Lane, in the County of Middlesex, and by him assigned to George.
Little, of Littleton, in the State New Hampshire, in the United.
States of America, Gentleman, Henry Adams Bellows, of Littleton
aforesaid, Attorney at Law, Truman Stevens, of the same place,
Saddler, and George Benjamin Redington, of the same place,
Merchant, for their Invention of "CERTAIN IMPROVEMENTS IN THE
CONSTRUCTION OF WEIGHING MACHINES;" being a communication from
a Foreigner residing abroad, bearing date at Westminster, the Fifth
day of October, in the fourth year of the reign of His late Majesty
King William the Fourth, to which said Letters Patent a Specifi-
cation was duly enrolled.
SCLAIMER AND MEMORANDUM OF ALTERATION proposed
to be entered by the said. George Little, Henry Adams Bellows, Truman
Stevens, and George Benjamin Redington, with the Clerk of the Patents
of England, pursuant to an Act passed in the fifth and sixth years of the
reign of His late Majesty King William the Fourth, entitled An Act to
amend the Law touching Letters Patent for Inventions.
, Henry Pooley, as Agent, duly authorised of and for the said George
tle, Adams Bellows, Truman Stevens, and George Benjamin Redington, do
are that the said George Little, Henry Adams Bellows, Truman Stevens,
George Benjamin Redington have been advised and believe that the said
ention is not accurately and correctly described in the Specification inrolled
ursuance of the said Letters Patent, for which reason we are desirous to
laim, and do hereby disclaim, all that part of the Specification which con-
of the following words:-"The construction of that part of the machine
enominated the rocker, with the manner of arranging the levers and
taching them to the rockers; the manner of constructing the joint with
eir knife edges, and of allowing that part of the joint called the standard E
vibrate, for the purpose herein-before described; the use of the adjust-
ble weight F upon any part of the beam of the balance for the purposes
escribed." And for the more perfect and accurate explanation of the parts
posing the said machine, we propose to add the words written in red ink

page_text: in the Copy of the proposed amended Specification hereunder written, and
which is to be taken as part hereof, in which we have ruled through those
parts with red ink on page six, which we propose to disclaim in the description
of the said machine, and have introduced the words. we proposed to add, as
in pages two, four, and six, so that the workmen may, with the more accuracy,
be enabled to understand and make our said patented machine when the said
Letters Patent shall be expired; and we propose to make the alteration and
additions aforesaid accordingly.
In witness whereof, I, the said Henry Pooley, have hereunto set my hand,
this Twentieth day of February, One thousand eight hundred and
forty-three.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MILES
BERRY, of 66, Chancery Lane, in the County of Middlesex, Civil Engineer,
send greeting.
WHEREAS His present most Excellent Majesty King William the Fourth,
by His Royal Letters Patent under the Great Seal of Great Britain,
bearing date at Westminster, the Fifth day of October, in the fourth year
of His reign, did, for Himself, His heirs and successors, give and grant unto
me, the said Miles Berry, his especial license, full power, sole privilege
and authority, that I, the said Miles Berry, my executors, administrators,
and assigns, or such others as I, the said Miles Berry, my executors, adminis-
trators, 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 mentioned, should
and lawfully might make, use, exercise, and vend, within England, Wales, and
the Town of Berwick-upon-Tweed, an Invention of "CERTAIN IMPROVEMENTS
IN THE CONSTRUCTION OF WEIGHING MACHINES," being a communication from a
Foreigner residing abroad; in which said Letters Patent is contained a
proviso obliging me, the said Miles Berry, to cause a particular description of
the nature of my said Invention, and in what manner the same is to be per-
formed, to be inrolled in His 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, I, the said.
Miles Berry, do hereby declare that the nature of the said Invention, and
in what manner the same is to be performed, are particularly described and-

page_text: ascertained in and by the following description thereof, reference being thereto
had, and to the Drawings hereunto annexed (that is to say):-
These improvements in the construction of weighing machines apply to
that particular kind of apparatus called platform weighing machines, and
which may be employed for weighing either light or heavy goods. They may
be either erected as stationary engines for weighing goods in warehouses
or loaded carriages passing along roads, or they may be made portable for
ordinary commercial or domestic use. The improvements consists in a new
arrangement of compound levers and of the positions of the fulcrums or pivots
on which they vibrate, with suitable graduations upon the index beam, and a
simple mode of adjusting the apparatus or compensating for any expansion
or contraction of the levers from variation of temperature.
In the accompanying Drawings Figure One, Sheet One, represents a plan
or horizontal view of one of these improved machines intended to be fixed in
the floor of a warehouse or in a roadway. Figure Two is a corresponding
plan or horizontal representation, in which the platform is removed for
the purpose of exposing the levers and other internal parts to view.
Figure Three is a side elevation of the machine complete, similar letters
indicating corresponding parts in all the Figures. A, A, is the exterior
framework made of timber or other suitable material. B, B, are two sills
or beams extending lengthways of the machine, sustaining the framework
to which they are attached. C, C; are two transverse bars of wood or metal
which are called lockers, the levers D, D, being firmly attached thereto.
These rockers bear and vibrate upon four knife-edged fulcra on the tops of
the standard E, E, which are supported by the sills B, B, one of these
standards or fulcra being represented in perspective on a larger scale. In the
detached Figure 4 a recess is formed in the top part, of each standard, may
be made of hardened steel, cast iron, or other metal, to prevent its wearing
away. F, F, are the bearing arms affixed to the rockers, by which they
vibrate upon the standards. One of these is also seen in the detached
Figure 4, with its knife edge bearing upon the standard E. The projecting
part G, on the upper side of each of the arms F, also forms a knife-edge
support or fulcrum upon which the pieces of steel, cast iron, or other
metal H at the under side of the platform are supported. B, Figure 5,
is one of the two beams or platform timbers to which the pieces of suitable
metal H are fastened. These beams extend under the platform and
support the same, the platform being secured thereto by screws, bolts, or
otherwise. The parts I, I, see Figure 5, are excavations made in
the under side of the platform timbers to enable it to play free from

page_text: the end of the arm F, which rises immediately above the standard.
J, J, are braces extending from the rockers to the levers to keep them
in the proper positions. The pivots or fulcra made in this way are con-
sidered not only to be superior in strength, compared with those usually
employed, but their points of bearing, from the manner in which they are
connected, will always remain at the same distance from each other, and the
load will also preserve the same relation to the power, the bearing edges
uniformly preserving their general horizontal range. The middle fulcrum or
point of suspension seen at K will be best explained by reference to the
detached Figure 6. The part A is made fast to the lower side of the lever D,
and the part B to the upper side of the lever D, the double or connecting
hook C embracing the knife edges on both a and b. Figure 7 is a perspective
view of the upper of these knife edges, or the one fixed on to the lever D, and
which is seen in section in Figure 6. The end of the lever D extends under
the edge of one side of the frame, where it is connected with the balance of
steelyard. hereafter described. In the elevation, Figure 3, the lever D is seen
connected to the rod L, the lower end of which, in the form of a hook, passes
under a knife edge at the end of the lever. The hook is seen in the detached
Figure 8; and the staple on the end of the lever, of which the knife edge forms
a part, is shewn at Figure 9, but in a reversed position. It is shewn in its
right position in Figure 10. This staple is fastened on to the under side of
the lever D by the screw and nutt n, which admits of its being adjusted to its
place with precision. In order to prevent that thurst or swing of the platform, to
which it may be subjected by drawing a load on to it, or by shifting it when
placed thereon, jointed rods, chains, or links are attached to the end pieces of
the frame, which rods, chains, or links have hooks or loops upon their ends
adapted to pass into staples, or into pieces affixed for that purpose on the
under side of the platform. Four should be employed; and when hooked or
looped they should have a slight play, so as not to bind the platform, but to
allow it to descend the slight distance required in weighing; at the same time
they must prevent its striking or rubbing against the frame. By placing these
rods alongside of the timbers or beams upon which the planks of the platform
are fixed, which timbers usually run lengthwise of the machine, the rateral
thrust also is checked.
The improved mode of graduating and adjusting the beam and weights is as
follows:-The balance is of the steelyard kind, as represented at M, Figure 3.
The arm has divisions. upon, and a moveable poise and hook made in the
usual way, upon a rod. N, suspended on a knife edge. At its extreme end
different weights may be placed, which must be adapted to that of the article

page_text: to be weighed. We may now suppose the beam of the balance, with it
moveable poise, to be so graduated and proportioned as to weigh any numbe
of pounds from one to a hundred; then the weights to be placed upon the
rod N are to be of such size that they may respectively weigh one hundred
two hundred, five hundred, one thousand, or any other number of pounds
hundreds, or tons, as the case may be. The moveable poise will then give the
means of ascertaining the number of pounds up to one hundred, et cetra, which
the weight of the article may exceed that indicated by the even hundred upor
the rod N. These numbers are given merely for the purpose of exemplifying
the principle upon which the weights are graduated, and to render apparent its
applicability to others of any required amount or proportion. For the purpos
of obtaining an exact counterpoise to the platform, and bringing the beam into
the due horizontal position, a rod or bar n, with a screw cut thereon, and a cylin
drical or other formed weight f, with a female screw passing through its centre
is placed thereon. The screw e extends along and is parallel to the beam, or
rather to a line uniting the points of suspension. By turning the weight f sc
as to move it along the screw, the beam and platform may be equipoised
with the utmost precision. When the screw rod is placed upon that part of
the beam represented in the Drawing, the arms by which it is attached to the
graduated part of the beam are bent or curved out of the way of the hook of
the moveable poise; but the opposite end of the beam may be lengthened so
as to allow the regulated weight to be placed thereon, when it will be entirely
out of the way of the graduations, or it may be placed on other parts of the
beam. If it should be found desirable to allow the standards to oscillate in a
small degree to accomodate themselves to the movement of the rockers, that
may be effected by attaching the standards to the sills by a joint having
a small extent of action.
When these improved weighing machines are constructed for the use of
warehouses, stores, et cetera, for the general purposes of weighing merchan-
dize, the form of the apparatus and the direction of the levers may be modified
in such a way as to render it in some respects more convenient than the one
just described.
The accompanying Drawing, Sheet Two, will serve to exemplify this kind of
modification.
Figure 1 is a plan of the machine with the platform in its place. Figure 2,
a view of the under side of the platform in its place. Figure 2, a view of
the under side of the platform. Figure 3, à plan of the machine when the
platform is removed. Figure 4, a lateral view, the outer parts or casing being
removed to exhibit the general arrangement. Figure 5 shews a section of the

page_text: box and the frame which surrounds it to receive the platform. Figure 6 is a
detached representation of the knife-edge suspension at the junction of the
livers. Figure 7 is a similar view of the joint, which is bolted to the rocker,
and which is suspended from the frame surrounding the platform by a knife-
edge suspension, instead of bearing upon a standard, as in the former arrange-
ment. In each of these Figures the same letters are employed to designate
similar parts. A, A, is the platform, which strips of iron B, B, upon its
edges, which platform consists of a frame or stool of cast iron or other suitable
material, as shewn by the part colored blue in Figure 11, Sheet 11, and a
plate or table of timber or metal resting upon frame, which, if more conve-
nient, may be fastened thereto by means of screws or otherwise. C, C, are
parts of the frame surrounding the platform, which can be removed by taking
out the screws a, a, for the purpose of adjusting and fixing the rods for
preventing the thrust of the platform. D, D, are the rockers, upon one of
which is fixed the two short levers E, E, and upon the other the two longer
levers F, F, each pair acting as single levers upon the rockers D, D. Near
their ends are bolted the bearing pieces G, G, leaving knife edges shewn at
H, H, in Figure 7; upon these the parts J, J, of the platform rest.
As one
of the rockers is placed lower than the other, the bearing pieces J, J, vary
in their length, so as to be adapted to the projecting knife edge H upon
the bearing pieces G. The parts I, I, are best made of cast iron chilled
on the face. The mode of forming the knife-edge bearings at the junction
of the two pairs of levers J, J, is shewn in Figure 6, one piece K, with its
knife edge, being attached to the shorter, and another L to the longer levers,
and a ring M being substituted for the double hook c in the first-described
machine. N, N, are the heads of the rods and rings, which form a part of
the knife-edge suspension of the hinges on the rockers. The rod O leading
from the ends of the double lever F, F, to the balance has its suspension
formed in the manner before described. The machine is intended to be let
into the grounds so that the platform may stand level therewith, and it may
be so placed that the rod leading to the balance may pass up under a counter
or otherwise, as may be preferred.
In Sheet 3 the modification represented is adapted to be used as a portable
scale, the outer frame being cast in one entire piece.
Figure 1 shews the machine in perspective, the pillar p which sustain the
balance and its appendages, and through which the suspension rod passes
perpendicularly to the levers, is connected to the machine by bolts and screws.
Figure 2 represents a cast-iron frame or case A, shewing the double

page_text: levers E, E, and F, F, the platform being removed. This iron frame is
placed upon and fastened by screws to its counter part, made of wood, and
which forms the bottom part of the case.
Figure 3 represents the machine with the platform in its place, the dotted
lines representing the rods for preventing the lateral thrust or swing, which are
fastened to the timber 2 in the middle of the machine.
Figure 4 is a view of the under side of the iron frame and the levers, the
machine in this Figure being inverted. The levers are of cast iron, and each
double lever with the roller is one piece of casting, the pivots or knife-edge
joints being of steel, and projecting laterally, as at c, c, to receive the bearing
pieces upon the platform. The mode of connecting the levers is the same as
that described in Figure 6.
Sheet Two, Figure 5, is a side view of the double lever F, F, shewing the
manner of suspension by means of loops and staples rivetted to the iron-frame
at each corner.
In adapting this improved construction of machines to the purpose of weigh-
ing boats or barges with their cargoes in canal locks, it is only necessary to
extend the arrangement of double rockers under a platform of sufficient length
to support the boat or barge. Figure 6, Sheet Three, exhibits a Diagram of
an arrangement suited to this purpose. a, a, a, are the rockers; b, b, b, the
longer double levers; c, c, c, the shorter levers bearing upon the fulcrum,
as described in the preceding Figures. The outer ends of the levers b, b,
are connected by knife-edged fulcrums to a cross lever d, from the centre of
which the rod leading to the index beam is connected.
The points which are claimed as new, and as improvements upon the
platform weighing machines hitherto used, are the following:-The construction
of that part of the-machine-denominated-the-rocker, with the manner-of-arranging
the levers and attaching them to the reekers-; the manner of constructing the joints
with their knife edges, and of allowing that part of the joint called the standard E
to vibrate for the purpose herein before described; the use of the adjustable-weight
f-upon-any-part-of the beam of the balance for the purposes described.
First, the arrangement and form of the rockers and levers, with the con-
struction and use of a diagonal, long, or principal lever.
Second, the peculiar construction of the parts called the joints, including the
position of the knife edges, and the method of preserving the relative ranges and
distances of the fulcrums and sustaining joints by means of oscillating props or
suspended links.
Third, the peculiar form of steelyard and manner of suspension of the

page_text: steelyard herein-before described, and the method of keeping the equilibrium of the
machine by the use of a weight moveable along a screw fixed upon any part of
the balance or steelyard.
Fourth, the construction and manner of using the platform as described,
having a frame or timber sills underneath the platform, with suitable bearings
resting on the sustaining points upon the levers.
Fifth, the use of a lever placed over the head of the machine, and connected
with the levers below the platform, for the purpose of relieving the centres and other
working parts from strain or wear at all times, except while actually weighing
goods.
It is manifest that the improved combination, consisting of the platform, its
levers and joints, may be employed in connection with a balance constructed
and graduated as in ordinary weighing machines, and that the balance with its
adjusting piece, constructed and graduated upon the principle herein described,
may be applied to other weighing machines. These combinations therefore
are claimed both conjointly and separately; and I do hereby further declare
that I do not intend to confine myself to the exact form of constructing the
various parts of the machine shewn in the Drawings, but allow myself the
right to vary the same as may be found convenient in any way which may
produce similar effect by the application of the same principles.
In witness whereof, I, the said Miles Berry, have hereunto set my hand
and seal, this Fifth day of April, in the year of our Lord One thousand
eight hundred and thirty-four.
Taken and acknowledged by Miles
Berry (party hereto) at my house,
in Upper Grosvenor Street, in the
County of Middlesex, this Fifth
day of April, One thousand eight
hundred and thirty-four, before
MILES (L.s.) BERRY.

page_text: Redington, has applied to me for leave to enter with you the above-written
Disclaimer and Memorandum of Alteration of part of the Specification of a
certain Invention, for which Letters Patent were granted to Miles Berry,
dated at Westminster, the Fifth day of October, 1833, and to which a Speci-
fication was duly enrolled. And on considering of the said application I
directed him to advertise the said Disclaimer and Memorandum of Alteration
in the London Gazette, and in the Times and Morning Chronicle newspapers;
and such advertisements having appeared, and no objection having been made
to the same, I have accordingly granted leave to the said Henry Pooley to file
the said Disclaimer and Memorandum of Alteration, pursuant to the Statute
passed in the fifth and sixth years of the reign of His late Majesty King
William the Fourth, intituled An Act to amend the Law touching Letters
Patent for Invention.
AND BE IT REMEMBERED, that on the Twenty-second day of February,
in the sixth year of the reign of Her Majesty Queen Victoria, the said Henry
Pooley came before our said Lady the Queen in Her Chancery, and acknow-
ledged the Instrument aforesaid, and all and every thing therein contained
and specified, in form above written. And also the Instrnment aforesaid was
stamped according to the tenor of the Statute made in the fifty-fifth year of
the reign of His late Majesty King George the Third.
Inrolled the Twenty-second day of February, One thousand eight hundred
and forty-three.