156

THE COLLIERY GUARDIAN.

January 16, 1911.

Dundee, January 30.—Alternator, tyc.—For the Corpora-
tion: (a) 5,000 kw. steam turbine and alternator; (fc) con-
densing plant; (c) 750 kw. rotary converter, with trans-
former. Specification, obtainable on payment of one guinea
(returnable), from Mr. H. Richardson, M.Inst C.E , general
manager and engineer, Electricity Department, Dundee.

Feilding (New Zealand), January 30.—Power Plant.—
The Feilding Borough Council invite tenders for plant for
the municipal electric power station:—Two Diesel oil
engines, two alternating-current generators, with exciters,
&o., a switchboard, two fuel storage tanks of 100 gallons
capacity each, a 10-ton bulk oil tank, a travelling crane, a
cooling tower and tank, &o. Forms, the Town Clerk,
Feilding, New Zealand.*

Guildford.—Condensing Plant.—Condensing plant of
the barometric type capable of dealing with 15,000 lb. of
steam per hour, for the Guildford Electricity Supply Com-
pany Limited. Tenders and full particulars to be sent to
Mr. H. L. Aiderton, Guildford Electricity Supply Company
Limited, Guildford.

Heckington (Lincs.), January 24.—Waterworks.—About
8| miles of cast iron mains and specials, 4 in. and 3 in.
diameter respectively, for the Sleaford Rural District
Council. Specification from the engineer, 74, Southgate,
Sleaford, upon payment of £2 2s. (returnable).

Ipswich, January 31.—Plant.—For the Electric Supply
Department: three-phase 300-k.v.a. 3,300-volt alternator to
couple to existing engine (rotary converter with trans-
former, A.C. booster and C.C. exciter, to give 312 k.v.a. from
C.C. to A.C.; automatic voltage regulator and booster;
cable connections) ; three 50-k.v.a. three-phase transformers
for substations ; high-tension three-phase main switchboard
for power station; high-tension and low-tension switch-
gear for substations ; two motor or rotary converters, each
250 kw. Specification from Mr. F. Ayton, M.I.E E , chief
engineer and manager, upon payment of .£1 (returnable).

Leigh (Lancs), January 23. — Alternator, tyc. — One
1,500 kw. turbo-alternator (impulse type turbine) ; 1,000 kw.
rotary converter; transformers, and switch gear, for the
Corporation. Specifications from Mr. Arthur T. Smith,
borough electrical engineer.

London, January 26. — Air Compressor. — A direct-
coupled, steam-driven, two-stage air compressor, at the
public baths, Manor-street, Chelsea, for the Chelsea Borough
Council. Specification from the engineer, Mr. Sidney R.
Lowcock, M.Inst.C E., 6, Queen Anne's-gate, Westminster,
S.W.

London, January 27.—Rolled Steel Bar.—For 584 tons
of special section rolled steel bar for magnetic brake shoes,
for theLmdon County Council. Forms from the Chief
Officer, London County Council Tramways, 62, Finsbury-
pavement, E.C.

Ottawa (Canada), February 3.—Steel Pipes.—About
42 miles of welded steel pipe, 54 in. internal diameter;
about 32 miles of welded steel pipe, 58 in. internal diameter ;
and about 11 miles welded steel pipe, 51 in. internal
diameter, for the Corporation. Forms and specification
from Sir Alex. Binnie, Son, and Deacon, St. Stephen's House,
Victoria Embankment, London, S.W.

Port Said, March 5 —Plant.—Tenders are invited by
the Egyptian Ministry of Public Works on behalf of the
Municipality of Port Said for the supply and erection of
air-compressing plant required for the air-compressing
station of the Main Drainage Department. Particulars
from Controller - General, Main Drainage Department,
Ministry of Public Works, Cairo.

PURLEIGH AND TOLLESHUNT d'ArCY, JANUARY 20.—
Water Mains —About 2,500 lineal yards of 3 in. water mains,
with the necessary fittings, for the Malden Rural District
Council. Specification from Mr. W. Almond, surveyor, 6,
Market-hill, Maldon, Essex.

Rochdale.—Plant.—Erection at their electric power
station, Dane-street, Rochdale, of engine-room extension,
new boiler house, &c.; turbo-alternators; turbo-alternator
condensing plants; water-tube boilers and boiler-house
equipment; for the Electricity Committee. Specifications
from Mr. C. C. Atchison, M.I.E.E., engineer and manager,
Dane-street, Rochdale, on receipt of a deposit of £2 2s.
(returnable).

Scunthorpe (Lincs.), February 4.—Well, #c.—For the
sinking of a pump well 12 ft. clear internal diameter by
about 60 ft. deep, the driving of adits, and the sinking of
boreholes, for the Scunthorpe Urban District Council.
Specification from Mr. C. Curtis Gray, engineer and
surveyor, Council Offices, High-street, Scunthorpe, Lincs.,
on payment of £2 2s. (returnable).

Tollesbury. February 3.—Well and Borehole.—Sinking
a well, 10 ft. diameter and 150 ft. deep, and for sinking from
the bottom of such well a borehole 12 in. internal diameter
to a further depth of 105 ft., together with other work in
connection therewith, for the Maldon Rural District Council.
Specification from Mr. W. Almond, surveyor, 6, Market-hill,
Maldon, Essex.

Wolverhampton, January 19.—Boilers.—Two water-
tube boilers complete with superheaters and mechanical
stokers, for the Corporation. Specification obtainable on
payment of .£1 Is. (returnable) from Mr. S. T. Allen, chief
engineer and general manager.

Workington, January 31.—Retort House, $c.—Complete
vertical retort house and plant designed for one million
cubic feet per diem, for the Gas Committee. Particulars
from Mr. H. Chamberlain, Gasworks, Workington.

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

Grimsby Coal fExports. — The exports of coal from
Grimsby during the week ended Friday, 9th inst., were
shown in the official returns to total 25,187 tons foreign and
517 tons coastal, compared with 19,310 and 107 respectively
during the corresponding week last year. Shipments:—
Foreign : To Antwerp, 714 tons; Assens, 318 ; Copenhagen,
1,583; Dieppe, 610; Drammen, 2 777 ; Gafle, 1,797; Gothen-
burg, 1,229 ; Gustafsberg, 1,687; Hamburg, 1,408 ; Helsing-
borg, 1,762; Kallundborg, 1,345 ; Malmo, 2,780; Norrkoping,
1,425; Oporto, 1,097; Riga, 2,007; Rotterdam, 111; Skien,
1,410; and Varberg, 1,127. Coastal: To Gravesend, 420;
and London, 97 tons.

ABSTRACTS OF PATENT SPECIFICATIONS
RECENTLY ACCEPTED.

4677 (1913). Improvement in Chucks for Rock Drills and
other Tools. P. A. Newton, of 6, Bream's-buildings,
Chancery4ane, London. (Communicated by Ingersoll-
Rand Company, 11, Broadway, Manhattan, New York,
U.S.A.)—Relates to an improvement in chucks and more
especially rock drill chucks of the kind which comprise a chuck
for receiving a drill steel, a strap surrounding the chuck
and a clamping shoe and wedge key located upon opposite
sides of the chuck within the strap, and has for its object

to provide certain improvements in the construction, form
and arrangement of the several parts of the chuck whereby
the parts may be brought within a very small compass, and
may be readily assembled and when in position are very
secure. The accompanying drawings show a longitudinal
central section, transverse section and a detail inverted
plan view of the clamping shoe respectively. The parts are
assembled before the drill steel is inserted into the chuck
by first inserting the strap into position, then inserting the
clamping shoe and finally inserting the wedge key. (Three
claims.)

4700 (1913). Improvements in Coal Conveyors. L. Hyve,
Dorignies, near Douai, Nord, France.—The object is the
reduction of the cost of conveyance from the working face
along the gradient in working thin seams of easy grade.
An application would be in longwall working where, even
with an irregular profile, this apparatus will allow of long
cuttings to be worked with a onsiderable output. The
apparatus consists of a series of troughs 1 m. in length.
Fig. 1 is a side elevation of one length or section of the
apparatus; fig. 2 a sectional plan (sides removed) ; fig. 3 a
vertical section through A—A in fig. 1; fig. 4 a vertical
section through B—-B in fig. 1. The whole forms a regular
series of flat parts and of rollers movable around their
pivots and made fast at will by their spokes on one side by
means of bolts or rods 1, 2, 3, 4, 5, 6. The bolts are
mounted to slide in bosses on the sides of the conveyor so that
they can be pushed in between the spokes of the rollers or
withdrawn therefrom, the movement being limited by
collars on the bolts. The bolts can also be rotated and
have their outer ends bent at a right angle and screw-
threaded, so that different bolts may be connected together
by a coupling bar, whilst the intermediate bolts can be
turned with their outer ends downwards out of the way of
the bar. The rollers being released rotate under the weight
of the coal and compel the coal to slide on the flat parts.
According to the circumstances the apparatus may
produce:—(1) A continuous flow corresponding to a
continuous loading by a permanent releasing of a certain
number of rollers, which is applicable to an inclined
cutting; (2) an intermittent flow of the contents of the
conveyor by the simultaneous release of a determined
number of rollers, enabling a rapid loading in carriages
(trucks) to be effected at the bottom of the cutting. In

this latter case and in the case of the very slightest gradients,
the apparatus is provided with flat coupling bars d—e
slotted to receive the outer ends of the bolts to which they
are connected by nuts f. Bars d—e corresponding to
different sections of the conveyor are coupled together by
sleeves with clamping screws g and can operate on bolts of
different sections of the conveyor. The number of bolts
connected may vary according to the slope of the seam, the
size and the nature of the products to be transported. The
size of the sides indicated are those suitable to a bed 1 m.
thick. The apparatus is made of iron, however, for low
gradients the rollers may be made of aluminium to reduce
the inertia. The type that is current, weighing about
50 kilogs., is made of sheet iron, with rollers and flat parts.
The play between the rollers and the fixed sheet irons in
the current type is 1’5 mm. The bearings v are made of
two semi-cylindrical valves with bolts in the lower half for
facilitating the unmounting of the rollers. A practical
precaution in connection with the working consists in first
loading the large products on to the bottom of the conveyor
and the smaller coal above. The cuttings made in the base
ijk (fig. I) enable the small quantity of small coal that
may have dropped through to be removed easily. The
ends of the side sheet irons below the bottom of the conveyor
are cut at a suitable angle for facilitating a joining in spite
of the changes of gradient. The apparatus is furnished
with two handles at each end. In an inclined cutting the
sections of the conveyor are brought into position by
means of a small wheel truck arranged to run on the upper
edges I h (fig. 1) of the conveyor sections already placed in
position. In a longwall working the conveyors are
removed sideways to the extent of one or more bays
accordingly as the goaf packing which they have served to
put in place has been dealt with. (Five claims.)

5374 (1913). Improvements in and relating to Haulage Clips.
G. Kelly, of 65, Gartness, Airdrie, Lanarkshire.—Has refer-
ence to improvements in haulage clips, and particularly to
the type in which two plates are loosely mounted on a

central bolt and forced apart at their upper part by means
of a wedge fitted to a handle so that the haulage rope is
gripped between grooves formed in the adjacent faces of
the plates at their lower part and a catch lever fitted to
the handle automatically locks the plates in the gripping
position, while projections or studs are cast on or riveted
to the plates to prevent the rope getting above the longi-
tudinal grooves. The improvements consist in substituting
for the loose or flexible connection a firm or comparatively
rigid connection by passing the end of the drawbar through
an eye formed at the upper end of a bracket formed in one
with or rigidly secured to one of the two plates of the clip.
The drawbar is retained in the eye by means of a pin passed
through a hole in the end of same. Fig. lisa side elevation,
fig. 2 a plan view, and fig. 3 a transverse sectional elevation
of a haulage clip. In operation the distance apart of the
two plates 4 and 7 is first adjusted, by means of the screwed
nut 9 on the central bolt 8, to suit the thickness of the



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rope 14, which is placed in the two grooves 13 so as to be
gripped between same. The wedge block 19 on the hand
lever 16 is now forced between the upper inclined faces ,15
of the two plates 4 and 7 so as to force them apart and thus
force together the lower parts of the plates, and therefore
tighten the grooves 13 on the haulage rope 14, the plates 4
and 7 swivelling on the central bolt 8. The end of the
catch lever 21 is now inserted in the V-shaped notch 18
and, by preventing the lever 16 from rising, retains the
wedge block 19 between the plates 4 and 7, and thus retains
the pressure on the haulage rope 14. When it is desired to
release the haulage rope 14, the catch lever 21 is simply
raised or knocked out of the notch 18 and the lever 16 raised
by means of its handle 17 so as to permit the upper parts 15
of the plates 4 and 7 to come together, and thus relieve the
pressure on the rope 14. (Three claims.)

5651 (1913). Miners’ Cartridge Safety Box. A. Kornowski,
of Worden, Madison County, Illinois, U.S.A.—Comprises a
body portion having a double metallic wall, between which
insulating material is tightly packed, an inner lid insulated

from and arranged to engage tightly with the body, and
an outer lid having means to engage the inner lid and hold
it firmly in place. The accompanying drawing shows an
end elevation of the receptacle with the covers raised. (Seven
claims.)

8050 (1913). Improvements in or connected with Valves for
Air Compressors and the like. J. M. Holman and J. L.
Holman, both of Camborne, Cornwall.—Relates to that class
of valve wherein the valve proper is composed of a flat disc of
slotted or perforated sheet steel or other suitable sheet metal
adapted to rise and fall in connection with a seating having
in it a series of ports or passages designed to be covered by
the metal between the slots or perforations of the sheet

metal valve, and wherein springs, arranged in a guard,
normally retain the said valve upon its seat. According to
the invention, helical springs are arranged to press upon the
solid portions of the flat valve above the ports, the said
springs being concentric with the spindle or boss upon which
the valve slides, and preferably composed of flat metal.
Fig. 1 is a section of an outlet valve constructed according
to the invention; fig. 2 is a section on the line 2—2, fig. 1.
(Two claims.)

17012 (1913). Improvements in Apparatus for Washing
Coal and other Minerals. P. Habets, of Montegnee, Belgium,
and A. France, of rue de FEsperance, 233, Liege, Belgium.—
Relates to improvements in or modifications of apparatus
for washing coal and other minerals as described in Specifi-
cation No. 22655/12. The object is to enable a large dis-
charge orifice to be employed and to provide means by which
the amount of water discharged is reduced to a minimum.
The collecting chamber below the washing elements is
provided with a trap having means by which it can be
refilled after each discharge independently of the water in