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Technical and Bibliographic Not«s/Note« tachniquM et bibiiographiquaa

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(All rights reserve(K)
ADVANCE PROOF— (.Subject to remd,m).
This proof is sent to yon fur discussion only, an<1 on tiic cxprjss
undcrstandiog that it is not (o be used for iiny otiici' purpos; what
ever. — {See Sec. 47 of the Conititution).

aiiadinij ^odety of Hiuil ^iiginjoiis,

INCUUl'OKATI-:!) 1887.

THANSACTIONS.

N.B — Tiiia Society, ii.>< a butiv, iIom not hold itself rcgpoiisible for tlie fuels
and opinions slated in aii> of its publications.

AN API'LICATTON OF 'HI K STONKY TATKNT SLUICE
TO LMVKi; IMl'UOVKMKNTS;

By G. E. KoBEiiTsoN, It.A.Sc, .M. Can. Hoc. O.K.

Among ilic niore iuiporffint contributions oK lat<' yearn toward tlio
iuiprovcnicnt of canal woik.s is tlic Stoncy I'atcnt iSluice.

This iiivi'Mtion lenders it po.'^siblc to riiice, by a small expenditure of
power, a eiamter balanced vertical bulkhead of st(!('l, of unusual dimen-
sions and with a heavy head of w.iter against its tiice. The bulkhead
bears against lollers set in a moveable fr.inn', and the friction which
would otiiciwisi,' i('.*nlt Ironi the iniinen.se pressure is thereby reduced
to a niininiuuj.

Under certain conditions of i iver ini[ii'ove:ii( nt it has oceuried to the
writer Ibat the.-ic sluices might bi' employed in such a w;iy that the
u.«ual tbriii of lift-loek could be di^|H'nscil with. The eonditions
chosen as an example :iic iis follows: A lapid, in un otherwise naviga-
ble river with n fill often feet in about a mile in length.

lieCerring to the sketch, it will be seen a liank is loruied on one side
of the river for the entire length of the 'Mpid, to tbiui a eanal.

At inteivals of abcLi .lalf a mile three pair,s of gates are placed
dividing the canal into two reaches. At each end ( f each reach are
Stoiiey .sliiiees eonnectiiig directly with thi; rapid. A vessel ascending
pa.?ses through the first pair of gates, whicli are then closed, and as she
]iroeeods through the lir.-t reach, the sluices at tlic^ upper iiid of it are
opened and the water enters from the rafiiil, raising the reach to the
level of the water half way up the rapid.

The second pair of gates can then be ojiciu'd, and the ves.scl pas.ses
into the secoml reach, which is raised in a similar manner by opening
the sluices at the iip])ei end, <'onnecting with the river at the head of
the rapid.

The third pair of gates can then be op( ned, and tlie vessel continues
on her way.

The advantages attending tlii> scheme nf river imin'ovenicnts maybe
set forth as follows :

Vessels may pass thiuugh the canal without stopping, at the usual
rate fixed for canals ; this, particularly in ease of long tow.s of barges,
would shorten the time of passage very much.

Vessels woulil never be near a eanal gate when there was a head of
water against it ; the ilangers attemliiig the usual kind of lockage, thi'
bringing of large vessels to lest within a few leet of closed gates, as
well as the damage done to shipping, would hi done awuy with.

The head of water against batiks and structures would never be
more than a few leet, thereby lessening the cost of construction.

The length of vosels is not limited.

Under favourable conditions there would he a saving in I'ost ol con-
struction, principally in masonry.

The" reason for placing the sluices between the canal and the river is
that each reach may thus have an iiidcpeudeiit supply id' water ; but
when tliis system is applied in its simplest form, that is, with only one
reach and a pair of gates at each end, it is then pMB.^ible the sluices
would be placed on the landward side of the gates, . hieh would have
the advsntagc of more ac-c^sihlc li'.unilaiion.'i, but the disadvantage of
causing currents in the entrances.

In eases where the whole discharge ol' a river is controlled, tlu^
adjoining reaches, providing they are not ol too great an area, might
be brought to the same level at suitable intervals of time by means of
these sluices, permitting the passage of vessels up or down without the
intervention of lift lop

HcUsAi^ttl^l

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TRANSACTIONS CAN SOC. C E..

VOL. IX. PLATE I.

Jap>tJ

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