E 4ro 3 
PATENTS LATELY ENROLLED. 
[Dec. 1, 
Communications of Specifications and Accounts of Nezo Pafezits, are earnestly 
solicited, and u'lll ulicays command early Notice, 
MR. JOSEPH dyer’s (gray’s inn), for 
hnprovements m the Constz'iictivn and 
Aielhod of using Plates and Pz'csses, 
and for combining raziom Species of 
JVoj'k in the same Piute, for Copper¬ 
plate Priziting. 
designed objects of this inven- 
JL tion, are to be able readily to de¬ 
tect counterfeits; to multiply impres¬ 
sions, and to save labour. It is well 
known tliat engraved copper-plates are, 
from the nature of the material, speedily 
worn out, and cannot be accurately re¬ 
stored to their original state, although 
they should be re-toiiched at a great 
expence; to avoid this difficulty, Mr. 
Dyer’s plan is to make use of steel, in¬ 
stead of copper; and the plates made of 
this substance, are thicker than those 
usually manufactured of copper, to pre¬ 
vent any spring^ that might be in them: 
and tiiat they may not he subject to 
break in the opera,tion of printing, he 
prefers using .steel cased on Cupper. 
Iron may be used for the engraving, and 
when that is put on the plate, it is to be 
case-hardened in the. manner described 
in the specification. Now one of these 
steel-plates, it is said, will serve to give 
as many impressions as would wear out 
a great nuaiber of coppcr-piatcs. In 
printing .bank-notes, lottery-tickets, Sec. 
in which the numbers require frequent 
changing, the plates are made with holes, 
or mortices through them, in such places, 
and of such sizes and figures, as the part 
or portions of the impressions requhe to 
be changed; and to these mortices, 
moveable blocks are fitter! and secured, 
60 that tlieir engraved oig wrought sur¬ 
faces, shall be evenly disposed, and form 
a plane with the face of the plate. I'hese 
moveable blocks are calcidated to re¬ 
ceive and contain the names of places, 
the numheis, dates, See. To render the 
counrerfeititig of bank-notes more diffi- 
ciilt, or almost impossible, the patentee 
cor.'^trucis and uses a compound plate, 
called a check-plate, the impression from 
which b^ing taken upon the back, or 
other pait of the surfaces of such notes 
iit'.d documents, will alford various cor- 
rerpoutling gauge-lines, for examining the 
same. This check-plate is formed by 
placing any number of pieces of iron, 
kiongaide pf taob otherj ;-o fitted 
together as to constitute one plate, 
which is fixed in a frame, and upon it 
patentee engraves, etches, impresses, 
or otherwise marks, certain figures diffi¬ 
cult or impossible to be imitated w'ith 
precision : he then separates the said 
pieces, and converts tliem into steel; 
and, in putting them together, he inter¬ 
poses between each engraved piece, an¬ 
other corresponding piece or slip of 
cast-steel, which may be polished, and 
then the said pieces, so alternating with 
each other in a case or frame, will affiord 
an impression consisting of certain 
stripes of engraving, alternating other 
stripes of plain paper, or paper having 
thereon an uniform or other ground. 
Our readers will see the principles on 
w’hich this invention is founded. We 
ardently wish that some means could be 
devised to prevent forgery, a crime that 
is increasing in a great ratio, notwith¬ 
standing tlie frequent executions which 
take place, not only in the metropolis, 
but in almost all the counties of Eng¬ 
land. We are inclined to think the 
above patent invention will not effect 
the purp.ose. We have long thought 
that, in this country, there are persons 
who will be able to imitate, witli suffi¬ 
cient accuracy, w hatever our best artists 
can produce. We say with “sufficient 
accuracy:” the persons who are guilty 
of this crime agaiixst society, do not cal¬ 
culate oil producing so perfect an imi¬ 
tation, as not to be detected at ail : it is 
sufficient for their purposes, th.at it is so 
correct as to deceive the trader or me- 
clianic, who become the dupes of their 
villainy. I'o this Mr. Dyer's patent-i 
plates would, we are pretty certain, be 
Subject, in common with evei y othey 
method that lias gone before tiieiii. 
MR. HALLOS (waettiamstow), for a Me¬ 
thod or Pz'ocess of manufacturlzig a 
Mutt nal from Twigs, cr Branches of 
Brovzn, Mallows, and Bushes, azi^ 
other Shrubs, or Plants of like Species, 
to he uStd instead of l-iu.v or Hemp. 
The twigs or shoots of broom of the 
preceding year’s growth, and tlio?e winch 
are most vigorous, arc always the be>t 
and most usetul, tiiey beiiig surrounded 
with a double co'.ering; ^be outer, re¬ 
sembling sca'es, or husks of wheat, rye, 
aa^ 
