New-York daily tribune., 1854-05-30
SCIENCE, INDUSTRY AND INVENTION
UNITED STATES.
From Our Own Reporter.

our sketches Of the machinery, may by
ulluding 10 an EevGtr machine Tor hels'ing goods
.xhibod BY Mr.. r. G. OTIS of fonkers, y. ~ which
attracts attention both by its prominent position AMI the
appareut daring Of the inventor who, he rides up and
down uron the platform occasionally the rope by
which ia supported. There points in which this
Is su,erior to the hoisting apparatus in general first
tle con ,enient arrangement OF the behipPcr, which
il worked by polling upon chain rope eH,endins DOWN
The side instead OF twisting rod BY handles attached
only at intervals and second, tie provision for perfect
safety in Of accident The inner sdes o the upright
guides between which the platform works, arc both pro-
vded with rack extending their whole length Bolts
catehes are carried on the frame of the platform, spring
being in constant tension ready TO throw them oui and
lock into the rack Tie strain the chain rope by
which tire platform If hosied kee the prnc compressed
under ell ordinary but IN clse is brel-
ing the spring suddery released extends the cachea az
once and prevents the descent Of the load. Ga the re-
adjustment Of the chain and again putting The machinery
in action the bolts Withdraw themselves and give NJ
further indication Of their existence uni: the occurrence
Of another voluntary or involuntary " accident.
Tie accomplishment of similar object safety IN case
Of threatened dsas.r il the design Of another but in
our iudQnert less successful device exhibited by Mes.r
Jones tnd Firel Of the City. II Is termed the Steam
"boor Sentinel and has been already briefly alluded 70,
although not in connection with this Exhibition. 1t is one
81 The many ingenious attachments designed prevent the
possibility of ses,n-boicr explosions under any circun
gtqncos Tie work ia ali contained in q chos, box o.
toordbe size top any other convenient position
nenr the boiler. The principle which it acts, or ia de-
signed to oct may be compfehonded by imagining piston
so situated that Il moved By the pressure OF the escaping
steam from the saotyyalye, and by its motion opens
slide-valve properly located and proporoncd This
sdevolye gives large opening for the escape Of the
s ON and The pressure in the boiler pdly dmnishcs
I'll such time the engineer may nd cxpodcn 10 close
~ L. al sf4gf- ttrrpai
roson his would be evidently very eici mt method
If provding FOR the Elimination OF pressure. Ie Objec
tios would urge arc purely graceal, and heref)re
IOsiibiy tc overcome; such O. the dmcuiy OF ad
jushg il 10 operate with certainty at or near any given
Irosurc md the probability that would suffer from cor
Ioor and or Wis in consequence of the unfrcuency
Of is use The only theoretical difficulty that occurs to Us
te ct that the pressure abor the must rise
sensible dC gree 20 overcome q ci.Dn even OF wei
olthed Tton and its lord. This would necestato cor
ie ending Lcroaso ol pressure in bo boiler or he safety
waive would cosc until the steam above had leaked oat
condensed.
We are assured however, tha; provision has been made
conenl lated r the removal of all the difficulties and
tie 0p araiUs ed Ia proper degree Of tntOn
In railroad mechanism model il exhibited by the Amer
can and Foreign Patent Agency Co. designed 10 provide
for the better trayersng by adopting change
in Il foiIn of he parts. The change in efec. merely
giving q eater degree of cone to The wheels and in
dining tie " per urf of the rails TO correspond there
with. Car wheels usually Of slightly greater diameter
the fenee, apering by degrees that we're the
wheel sufficiently wide il would terminate in point. 1t j.
evident that the real and effective diameter Of such wheel
DEL uds what parirois ON the track Now IN travelling
curve the fange Of the outer wheel inclined 20
crowd against the side Of the rail- but this movement in
crCc the elective diameter Of that wheel while de-
Ceoses that Of the o.her and the result Of this difference
in diameter is a tendency to run in circle nppoxmatng
some degree TO tie Of the track The coming of
The wheels involves difficulties, however in the straight
portions of the road arising from the necessity OF ncnng
the tOIs OF lie rails and asuppOsod tendency tO serpenne
movement continually changing from one side 10 the other
Ia UoUa practice, however ona common rough railroad,
tic is too energetic and Irregular 10 obey any pre-
that fom Which has been found by past experience pro-
ducvc Of tocrabe steady and satisfactory work. This
invention proposes TO adopt new form with view to the
allowing OF sharper curves when nece eary.
1leo several new models of bridges one oi which
by Nj. Dudley Blanchard of Troy, is worthy Of note
Icing om Tie same hand, and apparently the
prnciple as the Blanchard q Fellows iron bridge,
which has been introduced. and alsost uniformly with
complete success in The light and strong ussng of roofs
long Il nChos high and labelled weighing "a pounds
alu capable of sustaining 600. lt is evidently very
stiong model but as may be said in act of most other
modt gives but very slight indication OF the strength
similar structure large scale. In this case each
imleI, Of both top ard bottom chords is in one stick
throughout, and n not only too long but Of TOO grca
soaItirg 20 allow hope OF producing It's counterpart
sciyiceube dimcnsions. There other bridges
WORTHY of notice and is rmorcd thai another trial %
modes is 10 of soon between the parties,
Howe and Holman, and somewhat similar terms to that
which in the last years Exh lton attracted 90 much
attention
Mr. John Bel of Harlem, n. y, exhibits a recently
patented method Of joining wood which he terms Double
ObhqUe 1cnors ana Mores, aud which Il supeTlatIvey
neat e Ey fitted quite strong, and of form which
he readily made by suitable machinery The shape is
somewhat difficult describe without engraving j.
dovet0ling without doyctaing; into the ends of
bond Of Cqudstant cuts al in parallel planes, and
little inclined both crosswse and leIgthwise, that
whether viewed eudwise sidewise the cuts ltc
skew ed. Remove the wood between every alternate pair
aud Tie end If complete and ready t6 receive the
ondg end Of another boarpaCed at right angles 20 the
first, end driven tightly together. The inclination in the
specimens Of packing boxes on exhibition Is about in %,
and The bottom the vertical
necessary separation of the boards clap
locked together the result at all events
0dmIhbo corner and which We have never before
attempted any material one OF the be-. things IN
the Exhibition.
MI Hanson Wright exhibits portable Below Of great
power and stcadness OF ACTON, consisting OF hollow
chest will loaded diaI hra-m as reservoir. m lin
shaft wllh long aIins short and loaded pendulum.
lie oi AIMS are 10 receive an oscliaory motion from
the hcnCs oI the workman Tie short 10
give o and The pendulum To regulate It's motion, and te
nadine Is completed by adding any numbcr oi moderate
izoC bellows to supply the VIM. In this specimen two
horizontal bellows aie suspended udorneah ana An aldl-
81 Two larger ones secured IN vertical position al
le side Of the chest The h-am is z5n.a pari
leather across the chest slack ard loaded with
metal in the middle. Ii commences 80 blow with tAe first
CTInt OF tie hand and may be Glowed 10 blow as
ny iCs rs are required.
For ssw-inls Mr.. Abel Blskeslee of this Cry exhibits
elmer oin;cd edplate GUNNER filler ana oin,er,'
which operated without taking The saw ont ol the frame.
The cutting Of tie steel Is done by rotary bum utei
cylinder which il carried ia little frame 'jonted bed
paic temporarily attached the plate posi-
tCn at eny angle desired ON tis o.ned bed-piae he
caag, which supports the burr trryes slowly forward and
cuts tie tice back of the tooth any angle sired II
is decidedly good invention provided tOubtedly
the case tie burr be msdo to stand such usage.
Messrs. NJ. ". Chac Co. cf Brfslo N u. have jas
at work Lewis Patent Printing Press. low rric,d
ana tOCIgDly simple, but convenient affair. working some
v hat the principle Of Rugges Fla Cap press The form
beng stationary and the paper being laid &c face Of
the paien, which folds ks the tympan OF common
hGLdTe there several excellent points IN the de-
i1s tending to insure he exc lion q peri work and 20