The New York herald. [volume] (New York [N.Y.]) 1840-1920, 1848-06-23

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Dated and almost infinitely diversified machinery
devoted thereto. Numerous patents have been
granted tor improvements In hemp-brakers, ma
cnlnery for cleaning cotton; burning, carding, and
combing wool; making hats; doubling aud twist
ing thread; improved methods OF folding and mea-
surlng cloths, NC.
STEAM AND OTHER GAS ENGINEs.-About thirty
patents have been granted within the year, for I'M
provements IN steam engines, comprehending mo-
dltcdtions OF many OF the features of that impor-
tant machine. So much ingenuity has been exer-
cised upon the steam engine for such length OF
time, that might be expected, but few of the i'm
provements amount to anything more than slight
refinements upon what has hitherto been done.
Inc number OF patents granted IN this country,
and In Europe, for improvements In the steam en-
CINE is almost incredible; but 1t should be recol-
lected, that these improvements are not confined
to the general character of the machines, but are
connected also with Its adaptation to the multi
furious purposes to which it is applied, and the
endless variety of circumstances IN which it Is
placed-so that many notifications which would
be absolute disadvantages for some purposes,
would not only be patentable, but of the highest
importance In others.
NAVIGATION AND MARINE MPLENENTS.-About
twenty patents tor improvements comprehended In
this class, have been granted within the year,
some OF which appear to be very desirable. The
mass OF these improvements, however, are not
such as to claim particular attention in this place,
although calculated 10 operate WELL and upon prin-
ciples slightly different from such as have previous
~ been known. Great utility cannot be expected
In every patentable modification but the Vast i'm
portance of the few will easily reconcile to the
many. 1t is often observed, also, that novel mo-
difcation, from which little or no benefit seems
dervable, is frequently the first step towards the
most important results.
CIVIL ENGINEERING AND ARCHrrECruRE.
wards of twenty patents for Improvements IN civil
engineering and architecture have been granted
within the year, embracing improved excavators
and ditching machines, switches for railroads,
clearing snow from the tracks, new apparatus for
ascending and descending inclined planes by loco
motives and their trains also IN machines tor
drilling rocks, deepening channels, &c.
for improvements belonging to this class have been
granted within the past year, s.me OF which are of
considerable Importance.
HYDRAULICS AND Upwards of
twenty patents have been granted within the year
tor improvements belonging TO the class OF hydrau-
lies and pneumatics, very few of which can be
particularly noticed. These subjects have So long
exercised the ingenuity of inventors, that little else
appears possible, but to refine upon what has air
dy been done.
Mills, MECHANICAL MOVEMENTS, &c.-Near'y
twenty patents for improvements In machinery
belonging to this class have been granted within
the year. Many OF these improvements" would,
however, perhaps be more appropriately denoml-
mated changes, as they appear to promise but little
utility.
LUMBER AND MACHINERY FOR WORKING THEREIN
About thirty patents have been granted this year
for improvements belonging to this class 1t com
prehends great variety of machinery, to which
important additions are annually made. Machines
for working lumber have already attained SO high
degree Of perfection, that almost every variety
Of form may. with the greatest facility, be pro-
duced and finished by them. Yet the march is on
ward towards still higher degree of perfection.
FIRE ARMS AND IMPLEMENTS OF WAR.-Thls class
is less comprehensive and diversified than the
others, ad of course, presents fewer subjects for
inventions. 1t has, however, during the past year,
received considerable attention and although the
number of patents is much less than in the other
classes, yet they are more numerous than usual
and, on the whole, the improvements possess more
than average Importance.
MIscELLANEous.-ln addition to the foregoing
classes, about twenty patents of a miscellaneous
character have been granted during the past year,
embracing improved fire escapes, Irvine stands,
machines for cutting and raising ice, making
brushes, baskets, &C.