CERTAIN IMPROVEMENTS ON WEIGHING MACHINES, WHICH MACHINES HE DENOMINATES GERMAN WEIGH BRIDGES
Year: 1825

page_text: DEYERLEIN'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHANN
GEORG DEYERLEIN, of Mercer Street, in the Parish of Saint Martin-in-the-
Fields and County of Middlesex, Smith and Tool Maker, send greeting.
WHEREAS His present most Excellent Majesty King George the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Tenth day of November, One thousand eight hundred and
twenty-five, in the sixth year of His reign, did; for Himself, His heirs and
successors, give and grant unto me, the said Johann Georg Deyerlein, His
especial licence that I, the said Johann Georg Deyerlein, my exors, adñiors,
and assigns, or such others as I, the said Johann Georg Doyerlein, my exors,
adors, 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, my Invention of "CERTAIN IMPROVEMENTS ON
WEIGHING MACHINES, WHICH MACHINES HE DENOMINATES GERMAN WEIGH BRIDGES,"
communicated to him by a learned foreigner residing abroad; in which said
Letters Patent is contained a proviso, obliging me, the said Johann Georg
Deyerlein, by an instrument in writing under my hand and scal, particularly to
describe and ascertain the nature of my said Invention, and in what manner
the samo is to be performed, and to cause the same to be inrolled in His
Majesty's High Court of Chancery within six calendar months next and

page_text: immediately after the date of the said 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
Johann Georg Deyerlein, of Mercer Street, in the Parish of St Martin-in-the-
Fields, and County of Middlesex, Smith and Tool Maker, do hereby declare
that the nature of the said Invention as communicated to me, and the manner
in which the same is to be performed, are particularly described and ascertained
in and by the Drawing hereunto annexed, and the following description thereof
(that is to say):-
Fig. 1 is a side view or elevation of my improved weighing machine; Fig. 2
is a plan or view of the upper side of some of its parts, as will be hereafter
described; the same letters of reference refer to the same parts in Figures 1
and 2; Fig. 3 is a diagram by which I shall first explain the theory of the
weighing machine. Suppose the line A, B, is a lever turning on a fulcrum
at C; D, E, another turning on a fulcrum at E; and G, II, a lever or bar which
rests on and is at liberty to turn on a fulcrum at F, which fulcrum is fixed
on the lever D, E. The end B of the lever A, B, and the end D of the
lever D, E, are connected together by a rod or sling I, which is at liberty to
move freely on the points B and D at the ends of the levers; consequently the
end B of the lever A, B, and the end D of the lever D, E, will move through
equal spaces in the same time; the end G of the lever or bar G, II, is
connected to the lever A, B, at J, by a cord or sling K, in a similar manner
to the rod I. The distance between E, F, and D, must bear the same pro-
portion to each other as the distance between C, J, and B; if the distance
C, J, be 1, C, B=5, and E, F-5, the distance between E and D must
be 25, (that is to say,) as 1:55:25; it is therefore evident that the
point J in the lever A, B, and the point F in the lever D, E, must also move
through equal spaces in the same time; consequently both ends of the leyer or
bar G, H, will be raised or depressed with equal velocity; therefore its two
situations, as represented by the dotted lines L and M, will be parallel to each
other, while the levers A, B, and D, E, will have formed their respective
angles, as represented by the dotted lines. It is therefore evident that if a
weight be placed upon the lever or bar G, H, it will act with the same force
on whatever part of the line G, IT, it be placed; and it will be further observed
that if the distance between C and J=1, and the distance between C and
A=10, then one pound suspended at the point A will counterpoise ten pounds
placed anywhere upon the lover or bar G, II; therefore the weights requisite
to weigh any commodity will only be 1' of the weight of such commodity.
Altho' the proportions between A, C, and C, J, be as 10 to 1 in the diagram,

page_text: they may be made in any other proportion, for instance, as fourteen to one, or
twenty-eight to one, or as may be found most convenient for mercantile
purposes.
I shall now proceed to describe the weighing machine itself. N, N,
Fig. 1, and N, N, N, N, Fig. 2, is a trangular frame firmly fixed together
at its corners; 0, 0, is an upright part of the frame, also firmly fixed
between the sides N, N, &c., and further secured by two diagonal bars P, P,
one of which is fixed to each side of the upright o, o, and to the insides of the
frame N, N; to the upper part of the upright o, o, is fixed a piece of iron Q,
in the upper end of which is a slit to receive the beam or lever R, so as to
admit it to move freely within it; and on the upper ends of the piece Q is a
recess or notch faced with hard steel, upon which rests the knife edge of the
fulcrum S; the fulcrum is fixed in the lever R; on the upper side of the lever R,
are fixed three triangular pieces or fulcrums T, U, and V, made of hard steel;
the knife edges of the three fulcrums must be arrainged in a straight line with
each other, and with the knife edge of the fulcrums (as shewn by the red
line) and parallel to each other; W, W, in Fig. 1, and W, W, W, in Fig. 2,
are a triangular framed lever (in Fig. 1, it is represented only by dotted
lines), on the under side of which are also fixed three triangular pieces or
fulcrums X, and Y, Y, made of hard steel, having the knife edge of each
projecting downwards. The two pieces Y, Y, must have their respective knife
edge in the same right line, and parallel to the knife edge of the piece X;
they also rest and are at liberty to turn in notches made in two pieces of
hard steal Z, Z, which are fixed on the frame N, N. The end X. of the
lever W, W, &c. is suspended to the end V of the lever R by a sling or
rod a, b. It will be observed that the framed lever W, W, W, is supported
upon three points, two of which are at Y, Y, and the third at X; therefore it
will always have a regular bearing on each. In each end of the sling a, b, is
an oblong hole having pieces of hard steel a, b, with notches in them fixed in
the outer ends of the holes. The ends V of the lever R, and the end X of the
lever W, W, pass through the holes in the end of the sling, and the knife
edges V and X, rest in the notches in the pieces a and b, so as to move freely
in them. On the upper side of the framed lever W, W, W, and forming a
right line with each other, are fixed two knife edges c, c, which must be placed
parallel to the knife edges Y, Y, and X, and in the same horizontal plane with
them. d, d, d, d, is another triangular framed lever, the sides of which
consist of two wooden bars firmly united together at one end by a centre
piece c; the other ends are connected by an iron bar f, f, which is firmly
screwed to the sides d, d; on the under side of the bar f, f, (and over the knife

page_text: edges c, c, of the levers W, W,) are fixed two pieces of hard steel g, g, with
notches to receive the knife edges c, c. To the centre pieco e is fixed a stud h,
which passes through a hole in the lower end of a sling i, and is secured by
a screwed nut; the upper end j is similar to that of the sling, as already
described, but has an additional joint at k. On the upper side of the trian-
gular framed lever d, d, d, d, is fixed a platform or scale 1, 1, 1, 1; at one end of
it is fixed an upright plank or head m, m, which is further secured by the
diagonal stay o, o; the use of the head m, m, is to prevent any heavy body
from being rolled against the slings or lever R, and it also assists in supporting
anything that may be set up against it, for instance, a sack of corn, &c. The
platform or scale in Fig. 2 is represented by the red lines 1, 1, 1, 1. It will
also be observed that the triangular framed lever d, d, d, d, and platform aro
supported on three points, two of which rest on the knife edges c, c, affixed to
the lever W, W, W, and the third is at h, which is suspended to the lever R
by the sling, j; the platform therefore will always have a regular bearing.
To the cud T of the lever R is suspended a common scale p, p, on which are
placed the weights. To the upper ends of the chains of the scale p, p, is
fixed a small dish or scale 9 for placing small weights in to counter balanco
the platform 1, 1, &c. previous to the commencement of weighing; r, r, is a
bracket fixed to the upright o, o, having a slit in the upper end of it, through
which passes the arm of the lever R, and then prevents the levers from making
longer vibrations than necessary. The plan of the beam R, and the scale p, p,
are not shewn in Figure 2, as there is nothing material in the construction of
them but what will be understood by the elevation in Figure 1. Altho' I
have only shewn the lever R in one position, if I find it more convenient I can
place it either at right angles to its present situation, or reverse it, or placo
it below the levers W, W, W. Besides weighing common merchandize my
machine may be also applied with advantage in weighing live cattle, and as a
weigh bridge for carts, waggons, &c. In the weighing machine above
described, are several parts and combinations common to almost all weighing
machines; to such I lay no claim. My improvement consists in those parts
and the arrangement of them, whereby I secure the constant parallelism of
the points of suspension on the beam with those that support the scale or
platform in which the articles to be weighed are placed.
In witness whereof, I, the said Johann Georg Deyerlein, have hereunto
set my hand and seal, this Eighth day of May, in the year of our
Lord One thousand eight hundred and twenty-six.
(L.S.) JOHANN GEORG DEYERLEIN.

page_text: year
AND BE IT REMEMBERED, that on the Eighth day of May, in the
of our Lord 1826, the aforesaid Johann Georg Deyerlein came before our
said Lord the King in His Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained and specified, in form above
5 written. And also the Specification aforesaid was stamped according to the
tenor of the Statute made for that purpose.