March 13, 1914.

THE COLLIERY GUARDIAN.

589

CONTRACTS OPEN FOR COAL AND COKE.

For Contracts Advertised in this issue received too late for
inclusion in this column, see Leader and Last White
pages.

Abstracts of Contracts Open.

Bilston, March 23.—Coal, for the Urban District
Council. Forms from Mr. Vincent Turner, Assoc.M.Inst.C.E.,
engineer and surveyor, Town Hall, Bilston.

Coventry, March 17.—Engine coal (not larger than
double-screened nuts), for the Corporation. Forms from
Mr. J. E. Swindlehurst, M.Inst.C.E., city engineer and
surveyor, St. Mary’s Hall, Coventry.

Devonport, March 16.—Coal, for H.M. Government.
Forms from the Officer Commanding, Army Service Corps,
New Granby Barracks, Devonport.

Gainsborough, March 18.—Steam coal, for the Urban
District Council. Tenders to Mr. Sam W. Parker, engineer
and surveyor, Council Offices, Gainsborough.

Hull, March 20.—Coal, for the Corporation. Forms
from the City Engineer, Guildhall, Hull.

London, March 18 —For the supply of gas coke, for the
Commissioners of H.M. Works, &c. (maximum quantity
13,000 tons). Forms from the Controller of Supplies,

H.	M. Office of Works, 18, Queen Anne’s-gate, London, S.W.

London, April 2.—The Crown Agents for the Colonies,
acting for the Government of Mauritius, invite tenders for
21,000 tons of Welsh steam coal. Forms can be obtained
at the Crown Agents’ Office.

Lowestoft, March 20.—Coal and coke, for the Corpora-
tion. Forms from Mr. Geo. H. Hamby, A.M.I.C.E.,
borough surveyor, Town Hall, Lowestoft.

Portsmouth, March 18.—About 250 tons Hall’s nutty
slack and 250 tons Measham washed beans, including
delivery, for the Guardians. Forms at the Guardians’
Offices, St. Michael’s-road, Portsmouth.

Sheerness, March 21-24.—About 600 tons of washed
slack, for the Sheerness Urban District Council. Forms
form Mr. V. H. Stallon, clerk, Council Offices, Sheerness.

Tangier (Morocco), April 1. — The “ Commission
Generale des Adjudications et des Marches” intends to
contract, by private arrangement after competition, for the
supply of 1,500 tons of briquettes required by the “ Controle
de la Dette.”*

York, March 21.—Steam and house coal, for the
Elucation Committee. Forms from Mr. J. H. Mason,
secretary, Education Offices, Clifford-street, York.

The date given is the latest upon which tenders can be received.

CONTRACTS OPEN FOR ENGINEERING, IRON
AND STEEL WORK, &c.

Antwerp (Belgium), April 6.—Steam Engine.—For the
Municipal Authorities, steam engine with pressure pumps,
for the North Hydraulic Station at Antwerp.*

Auckland (New Zealand), March 26.—Hydro-eleotric
Power Plant.—For the directors of the Dominion Portland
Cement Company Limited, New Zealand (Wairua Falls) :—
Hydraulic equipment (including turbines, 1,500-horse power
each, governors, penstocks, valves, &c.) ; generators,

I,	000 kw. each, exciters, automatic regulators, &c. Specifi-
cations from Messrs. Walker, MacEwen and Co. Limited,
7, Princes-street, Westminster, S.W., on payment of £2 2s.
(returnable).

BeEston. March 28—Cast Iron Pipes.—About 324 tons
of cast iron pipes and special castings, for the Urban
District Council. Particulars from the engineer, Mr. W. H.
Radford, C.E., Albion-chambers, Nottingham, on deposit of
£2 2s. (returnable).

Farnworth, March 18.—Rotary Converter, fyc.—One
500 kw. rotary converter, transformer, switchgear, and
cables, for the Urban District Council. Specification from
the Council’s engineer, Mr. A. J. Hutchinson, Electricity
Works, Farnworth, upon payment of £2 2s. for each specifi-
cation (returnable).

Guildford.—Furnaces.—Three furnaces to be fitted to
three water-tube boilers, capable of burning 30 lb. to 40 lb.
of slack coal per hour per square foot of grate area, for the
directors of the Guildford Electricity Supply Company.
Smokeless combustion imperative. Further particulars can
be obtained by personal inspection of the works.

Hennock (Devon), March 19.—Pipes Laying.—About
3,300 yards of 15 in. cast-iron pipes, for the Torquay Cor-
poration. Specification from Mr. S. C. Chapman, water
engineer, upon the payment of .£1 Is. (returnable).

Huddersfield.—Drift.—Driving a drift from the surface
to the Halifax hard coal, a distance of about 100 yards.
Particulars obtainable from Read, Holliday and Sons
Limited, Huddersfield.

Keighley, April 11,—Reservoir, cfc.—Construction- of a
storage reservoir, for the Corporation. Specification from
the engineer, Mr. H. Ratcliffe Barnett, at the Town Hall,
Keighley.

London, March 17—Mechanical Stokers.—Two mechanical
coking stokers, for the Lambeth Guardians. Specifications
obtained at the Guardians’ offices.

London, March 17.—Steel Sleepers, <fyc.—About 266,000
transverse steel sleepers, weighing 75 lb. each, and 1,074,640
steel keys, for the Directors of H.H. the Nizam’s Guaranteed
State Railways Company Limited. Specifications, on pay-
ment of 10s. (not returnable), from Mr. M. T. Walker,
secrntary, offices of the Company, Winchester House,
London, E.C.

Penrith.—Water Scheme.—The West Ward (Westmor-
land) Rural District Council invite separate tenders or one
whole tender for 1| miles (approximate) Sin. diameter
Mannesmann steel tubes delivered and laid complete;
6| miles (approximate) 5 in. diameter ditto, 7 miles
(approximate) 6 in. diameter ditto, with specials, valves, &c.;
erection of intake works, screening chamber, three service
reservoirs, break-pressure tank, valve chambers, &c.;
3 miles (approximate) 3 in. diameter Mannesmann steel
tubes delivered and laid complete, 4| miles (approximate)

* Specifications, particulars, &c., may be seen at the
Commercial Intelligence Branch of the Board of Trade,
73, Basin ghall-street, E.C.

4 in. diameter ditto, 33 miles (approximate) 3 in. cast iron
pipes delivered and laid complete, 12 miles (approximate)
4 in. ditto, 1£ miles (approximate) 5 in. ditto, £ mile
(approximate) 7 in. ditto, with specials, valves, &c.; building
break-pressure tanks and valve chambers, &c. Specifications
from Mr. J. Graham, civil engineer, 28, Castle-street,
Carlisle, upon deposit of £5 (returnable).

Potterspury, March 20.—Waterworks.—Laying and
jointing of about 3,200 yards of 5 in., 4 in., and 3 in. cast
iron water mains, 500 yards 1 in. and in. galvanised water
tube, together with valves, hydrants, standpost, air valves,
and other fittings, the construction of the necessary
chambers in connection therewith, and other incidental
works, in connection with the Potterspury water supply, for
the Potterspury Rural District Council. Specifications
from the engineers, Messrs. W. J. Treadwell and Sons,
Middleton Cheney, Banbury, on payment of a deposit of
£3 3s. (returnable).

Potterspury, March 20.—A cast iron tank, supported
on steel staging, exclusive of foundations, for the Potters-
pury Rural District Council. Specifications from the
engineers, Messrs. W. J. Treadwell and Sons, Middleton
Cheney, Banbury, on payment of a deposit of £2 2s.
(returnable).

Rawtenstall, March 23.—Boilers, <S[c.—Water-tube
boilers, superheaters, mechanical stokers, and steam piping,
for the Corporation. Specifications from Mr. C. L. E.
Stewart, A.M.I.E.E., borough electrical and tramways engi-
neer, Electricity and Tramways Offices, Bacup-road, Raw-
tenstall, on payment, as a deposit, of £1 Is. (returnable).

Salford, March 23 —Superheaters, tfc.—Superheaters,
pipes and valves, for the Corporation. Specification from
borough electrical engineer, Electricity Works, Frederick-
road, Pendleton.

South Shields, March 13.— Plant.—Induced draught
plant motors and control gear and a self-supporting steel
chimney. Specification from Mr. H. S. Ellis, borough
electrical engineer, South Shields, on payment of £1 Is.
(returnable).

Torquay, March 19.—Cast Iron Pipes.—About 500 tons
of cast iron pipes, for the Corporation. Specification upon
the payment of 1 guinea (returnable), from Mr. Samuel C.
Chapman, M.Inst.C.E., water engineer, Municipal Offices,
Torquay.

Warrington, March 31.— Rotary Converter, dlfc.—For (1)
750 kw. rotary converter; (2) E H.T. switchboard panel,
for the Corporation. Specifications on payment of .£1 Is.
(returnable) from Mr. F. V. L. Mathias, borough electrical
and tramways engineer, Howley, Warrington.

Whippingham, March 18.—Cast Iron Main.—About
850 yards of 4 in. cast iron main, for the Isle of Wight
Rural District Council. Specifications from Mr. H. B.
Cullin, Brooklands, Wootton (I.W.).

ABSTRACTS OF PATENT SPECIFICATIONS
RECENTLY ACCEPTED.

3175 (1913) An Improved Jumper or Drill for Drilling
Holes in Rock. W. H. Whitby, The Oaks, Oak Drive, Fallow-
field, Manchester.—Relates to a drill made of steel or any
other suitable material with the head provided with integral
cutting edges so constructed as to cut only in a circle and
not across a circle as with the ordinary chisel-bit-shape drill.
The effect of cutting in a circle by this drill is that a hole

^9-/

may be drilled for the full depth required of the same
diameter throughout, also that the hole is a round one
when finished, which is an essential feature of the drill.
The drill may be hollow or solid. Fig. 1 of the drawing
illustrates the construction of the drill. Fig. 2 is an upward
plan view showing the cutting end of the drill. The
drawing represents a drill with a hole through the centre,
or what is called a hollow drill. (One claim.)

13345 (1913). Improvements relating to Divers’ Helmets-
Maschinenfabrix “ Westfalia” Aktien Gesellschaft, of
Gelsenkirchen, Westphalia, Germany. — Telephonic com-
munication with a diver working under water is not possible,
or is extremely difficult, by reason of the fact that the air
blown into the helmet makes such a noise that the diver
cannot understand what is said above the surface, and that
on the other hand the person at the surface cannot hear

distinctly enough what the diver says, owing to the accom-
panying noises. The invention aims to obviate these
disadvantages, and to enable telephonic conversation to be
carried on with a diver. For this purpose, in the helmet at
the end of the air supply a sound damper is disposed,
adapted to change the direction of the air-current repeatedly
and break the sound waves. By this means the noise

connected with the air discharge is prevented or greatly
reduced. The invention is illustrated in the accompanying
drawing. The sound damper comprises a hollow baffle
d1 fitted over the end of the air-supply pipe b, so that the
pipe does not deliver the air directly into the helmet, but
into the said baffle, which directs the air backwards and
opens into a second baffle d, which again changes the
direction of the air-current before this issues into the
helmet. (Two claims.)

14195 (1913). Improved Device for Preventing Accidents in
Coal 'and other Mines due to Overwinding.—W. Wilson,
Bathville Cottage, Armadale, West Lothian, Scotland.—
Relates to an improvement in or modification of invention
under a Patent No. 1655 of 1913, and dated November 21,
1912. The invention consists in improved means for
imparting motion or travel to the block or carrier, and to
improvement in the sectors and the means of raising and
locking the same described in the said prior application,
and has for its object to simplify such means. According
to the present improvements motion is imparted to the
block or carrier by means of sprocket wheels and chain.

The driving wheel is keyed or otherwise mounted upon the
drum shaft. An endless chain is employed to transmit the
motion from the driving shaft to a secondary sprocket
wheel. The shaft of the said secondary sprocket wheel is
mounted with a toothed pinion which engages the teeth of
the rack and gives the traverse motion to the block or
carrier. The sectors are raised by side levers actuated by
similar means as formerly, with the exception that the
slide is provided with a balanced lever in lieu of a helical
spring to keep it in the necessary position. The sectors are
locked in position by means of a pawl or catch engaging a
notch or indentation formed in the curved face of the
sector. Fig. 1 is a longitudinal side elevation, and fig. 2 is
a plan. (Three claims.)

25366 (1913). Improvements in or Relating to Conveyors
for use in Coalmines and other places. J. Bowman, of
Rosefield, Gardenside, Uddingston, Lanarkshire, and J.
Jackson, of 4, Brackley Villas, Little Hulton, Bolton,
Lancashire.—Refers to improvements connected with or
relating to that type of conveyor for use in coalmines and
other places, comprising a stationary trough, a carrier
movable backwards and forwards within the trough, and
means for discharging the contents traversed by the carrier
at a point or points of delivery, and is particularly appli-
cable to the construction of conveyor described in the
Specification of Patent Application No. 7201, March 26,1913.
According to this invention there are provided plates or
shutters at desired distances apart located between the ends
of the trough and the point of discharge. Normally the
plates are in a vertical position and extend from side to
side of the trough, while the lower edges of the plates are
at a level just above the surface of the carrier. With such
an arrangement, supposing coal to be filled into the trough,
the advancing end of the carrier will pass through and
beneath the bulk of the material, but the traverse of the
material will be stopped by the next forward plate or
shutter which is at that time held immovable, and therefore
the shutter holds back the material against its rear surface ;
and so the carrier continuing its advance passes through

the material or coal and beneath shutter after shutter until
it reaches the end of its travel, and the mass of coal which
was lying in the trough will now be upon the surface of the
carrier and distributed upon that carrier by and between
the plates or shutters. When the carrier commences its
return motion, suitable means are provided whereby the
plates or shutters are automatically or mechanically
removed or turned aside so as not to interfere with the
material carried upon the carrier, and consequently the
material will be carried by the carrier during its return
motion and discharged at the point of delivery. As an
example of construction the plates or shutters may be
carried and hang pendant upon hinges, and stops are then
fitted on the trough for instance, to prevent the shutters
swinging in the direction of the advance of the carrier, but
which stops permit the said shutters to swing aside in the
direction of the return of the carrier. Beyond this there is
provided on each side of the trough a curved inwardly pro-
jecting guide, beneath which guides the carrier passes, and
the guides serve to ensure the carrier passing beneath the
lower edge of each shutter. Fig. 1 is a transverse section
of a trough showing one of the shutters in elevation. Fig. 2
is a vertical longitudinal section. (Four claims.)