826

THE COLLIERY GUARDIAN.

April 27, 1917.

ing air guns, in glass works, in colour sprayers, etc. In
the accompanying drawings, fig. 1 shows a two-stage com-
pressor provided with the improved crank handle; fig. 2
is a plan view of fig. 1; fig. 3 is an enlarged view of the
new handle. The low-pressure cylinder 1 is connected to
the high-pressure cylinder 2 by means of a pipe, in which
is placed the non-return valve .3. The high-pressure
cylinder is connected to the reservoir by the non-return
valve 4. In the low-pressure cylinder 1 works a piston 5
having a piston rod 6, whilst the high-pressure cylinder is
provided with the piston 7 and the piston rod 8. The
piston rods 6 and 8 are guided by cross heads 9, 10 in
guides 11 and 12. The shaft 13 of the crank has its middle
part mounted in a bearing 14 between the two cylinders
1 and 2. The driving cranks 15 and 16 on the shaft 13
are set at an angle of 180 degs. to each other. The ends
of the cranks 15 and 16 are coupled to the piston rods by
connecting rods 17 and 18 respectively. 19 is the operating
crank lever which is provided with the handle 20. Half
a revolution of the crank is equal to the stroke of the
pistons 5 and 7. In the descent of the piston 5 of the
low-pressure cylinder 1, moderately compressed air passes
through the valve 3 into the high pressure cylinder 2. In
the subsequent descent of the piston 7 of the high-pressure
cylinder 2 this air will be further compressed, and will
now be forced into the reservoir or air vessel through the
valve 4. Naturally, during the first strokes of the low-
pressure piston, only part of the slightly compressed air
enters the air vessel. As soon as the compression in the
air vessel is equal to that in the low-pressure cylinder, the
high-pressure cylinder only will act to fill the air vessel.
As the force required, as above stated, increases with the
degree of compression in the air vessel, means are pro-
vided to increase the arm or leverage, and so enable the
operator to work without undue strain. It may be advis-
able to connect the handle to the crank lever detachably so
that it may be removed when the compressor or air pump
is out of action. The. handle may also be hinged to the
telescoping crank lever, so that it may be turned or folded
out of the way if desired. (Seven claims.)

HEW PATENTS CONNECTED WITH THE
COAL AND IRON TRADES.
Applications for Patents.

[Note.—Applications arranged alphabetically under the
names of the applicants (communicators in parentheses).
A new number will be given on acceptance, which will
replace the application number.]

Bell, W. Ventilation. (5523)

Belleville, A. Internal combustion engine. (5464)

Bennis, A. W. Furnaces. (5542)

Breeze, J. F. Centrifugal pumps and fans. (5627)

British Thomson-Houston Company (General Electric Com-
pany). Metals and their manufacture. (5400)

Bullock, S. Apparatus for spraying liquids' for cooling,
etc. (5359)

Burchett, J. H. P. Internal combustion engines. (5360)

Clark, H. E. Tipping wagon. (5623)

Crossley, Sir K. I. Pistons for internal combustion
engines. . (5428)	.

Croucher, S. J. Method of manufacture of explosives.
(5630)

Cummings, A. and M. Internal combustion engines.

' (5344)	J .

Dubois, R. Valve gears for explosion engines. (5152)

Edwards, N. T. Composition or solution thereof for saving
coal. (5345)

Ericsson, E. Moulds for casting heavy chains, and
machine for manufacturing same. (5487)

Evans, 0. B. Manufacture of toluol, etc. (5567, 55.8)

Fay, H. Anti-priming devices or baffle plates for evapor-
ators, steam generators, steam separators, etc. (5432)

Ferguson, C. M. Ventilation. . (5523)

Forster, J. E. E. Chemical process for extinguishing fires.

(5548)

Froggatt, W. Convertible screw pump. (5479)

Gale, A. R. Internal combustion engines. (5456)

Geairns, A. D., a id Longstaffe, T. Manufacture of
briquettes, silica, plastic, ganister, fire, etc., bricks.
(5441)

Globe Pneumatic Engineering Company. Rotary com-
pressors or exhausters. (5461)

Gwynnes Limited. Centrifugal pumps and fans. (5627)
Hallback, C. A. Internal combustion .engines. (5460)
Hartley, H. Furnaces of the crucible, etc., type. (5336)
Holden, A. Coal, etc., elevating mechanism. (5547)
Holehouse, W. and W. H. Mechanical stokers for boiler
furnaces, etc. (5491)

Hopkinson, A. Driving tunnels in earth or soft rock.
(5509)

Imperial Trust for the Encouragement of Scientific Indus-
trial Research. Heat treatment of steels. (5353)

lonides, A. C. Gaseous fuel furnaces. (5352)

Jackson, L. C. Tipping wagon (5623)

Jackson, W. J. Mellersh- (Leyner Engineering Works Com-
pany). Drill sharpening machines. (5530)

Johnston, J. Rotary compressors or exhausters. (5461)
Jolnerkevitch, P. Impregnation of wood, etc. (5420)
Kenike, A. de. Generator of petroleum gas for lighting or
heating. (5527)

Linden, L. Method of manufacture of explosives. (5630)
Loras, O’. Transformers for alternating electric currents.

(5401)

Lucy, E. E. Steam superheaters for locomotive, etc.,
boilers. (5539)

McIntyre, W. H. Explosive gas engines. (5526)

Manchester Furnaces Limited. Furnaces for heat treat-
ment of metals. (5570)

Matthewman, W. Internal explosion engines. (5552)

Mills, F. P. Chemical process for extinguishing fires.

(5548)

Morris, A. Reversible turbine. (5327) ‘

Ordidge, R. E. Mode of hot process galvanising iron and
steel plates, sheets, etc. (5550)

Pochin, H. S. and R. F. Screening plant for metalliferous
ores, etc. (5549)

Pringle, R .W. Means for generating combustion products
under pressure for use in engines, pumps, etc. (5361)

Proctor Limited, J. Coal, etc., elevating mechanism.
(5547)

Pure Coal Briquettes Limited: Destructive distillation of
carbonaceous substances, applicable to treatment of
ores. (5583)

Raymond Brothers Impact Pulverizer Company. Pulver-
ising mills. (5517)

Richmond Gas Stove and Meter Company. Furnaces of
the crucible, etc., type. (5336)

Rosenthal, M. Centrifugal fans, exhausters, compressors,
blowers, etc. (5572)

Russell, W. A. Furnaces for heat treatment of metals.
(5570)	'	. . i .

Rutherford, R. Internal combustion engines. (5554)
Sayer, C. E. Fuel economy of steam locomotives. (5585)
Smethurst, H. Spraying or atomising apparatus. (5348)
Smith, D. Heat treatment of steels. (5353)

Soc. Anon, de Magnetos et Appareils Electriques Sama.
Magneto or dynamo electric machine. (5411)

Soc. C. M. Stein et Cie. Rocking devices for mixers.

• (5532) -

Sutcliffe, E. R. Destructive distillation of carbonaceous
substances, applicable to treatment of ores. (5583)

Taylor, T. A. Wire ropes. (5382)

Thuman, F. (Evans). Manufacture of toluol, etc. (5567,
5568)

Tiarks, M. C. Constant current motor and dynamo with-
out commutator. (5494)

Tissier, L. E. Calcining and roasting ores. (5463)

Underwood, A. L. Ventilation. (5523)

Veale, E. Grate or furnace. (5392)

Warrington, E. Dampers for steam generators. (5426)
Webb, W. Le P. Pistons for internal combustion engines.

(5428)

Whiteinch Galvanizing Company. Mode of hot process
galvanising iron and steel plates, sheets, etc. (5550)

Whitham, F. E. Preventing corrosion or waste in metallic
debris. (5375)

Whitham, F. E. Treating metallic clebris, preventing
oxidisation during fusion, and furnaces therefor.
(5376)

Wright, J. and E. Wire ropes. (5382)

Complete Specifications Accepted.

(To be published on May 10.)

•	,1915.

1142. Vulcan-Werke Hamburg und Stettin Akt.-Ges.
Method of and means for operating hydraulic
gearing.

1916.

[Note.—The number following the application is that
which the specification will finally bear.]

484. Fried. Krupp Akt.-Ges Grusonwerk. i Magnetic
separators. (100062)

603. Thornycroft and Company, J. I., and Barford,
V. G. Means or apparatus for supplying liquid
fuel to internal combustion engines. (105347)
2058. Schroeder, G. Dynamo electric machines. (102406)
2134. Perks, C. C. Rotary pumps. (105350)

3376. Davies, A., and Allen and Company, E. Magnetic
separators. (105354)

4983. Bourne, L. V. Electrically controlled apparatus
for indicating liquid levels, and the rise and fall
of gas holders and contents thereof. (105366)

5013. Carsalade, A. de. .Band conveyor for heaping
materials. (100254)

5020. Baumann, K. Steam turbines. (105370)

5043. Lanchester, F. W. Valve operating gear of petrol
and other internal combustion engines. (105373)
5139. Price, S. W. Tilting furnaces. (105381)

5190. Cory, F. G. Internal combustion turbines. (105384)
52Q9. Orville. T. L. R. d’. Internal combustion engines.

(105387)

5306: Sadler and Company, and Bellerby,, J. Stills for
the fractional distillation of volatile liquids.
. (105395)

5309.*Prioleau, W. L. St. J. Apparatus for treating peat.
(105396)

5470. Lauder, D. J. -Bit for cutting circular undercut
' holes and holes of various diameters. (105408)

5629. Fletcher, J. Pillar mountings for rock drills and
coal cutters. (105414)

5805. Broom, H. S., and Broom and Wade. Thrust bear-
ings. (105420)

6395. Clayton and Shuttleworth, and Bretherton, F. J.
Steam engine governors. (105430)

6452. Hall, I. Oil-fired furnaces and the like. (105431)

6480. Beardmore, W.,.and Pullinger, T. C. W. Valve
mechanism and associated parts of internal
combustion engines. (105433)

6533. Anslow, P. T. Automatic couplings for railway
rolling stock. (105436)

6775. Jackson, W: J. Mellersh- (Lovekin, L. D.). Helical
baffles for heat exchangers, boiler flues, and the
like. (105437)

7759. Whitfield, C. Gas producer plant. (105449)

8062. Cardonnell Tin Plate Company, Strick, J. H., and
Rees, J. P. Machines for cleaning or branning
tin-plates or terne-plates. (105455)

9159. Bullivant, F. A., and Selby. G. M. Apparatus for
use in dragging, or hauling, and analogous
operations. (105471)

9714. Chemische Fabrik Griesheim-Elektron. Process for
the production of an alloy containing magnesium
and serving for the de-oxidisation of cast iron or
steel. (100848)

10838. Shankland, D. Tipping wagons. (105489)

10959. Hannin, J. Liquid fuel for internal combustion
• engines. (105490)

12427. Reck, A. B. Sectional boilers. (105500)

13164. Wada, K. Time alarms or indicators for use in con-
nection with the stoking of boiler furnaces and
the like. (105504)

14594. Knopflmacher, A. Process for the production of
charcoal. (102608)

15352. Reik, H. Valve springs of multi-valve engines.
(101981)

16387. Lleo, A., and Baradet, C. Internal combustion
engines. (102262)

18635. Fletcher, J. Percussion rock drills and coal cutters
operated by fluid pressure. (105528)

1917.

245. Clune, J. G. Device for preventing down draughts
or reverse currents in flues. (105531)

2097. Walker, J. R. Link joints for conveyor and like
chains. (105539)

Complete Specifications Open to Public Inspection Before
Acceptance.

1917.

[Note.—The number following the application is that
‘which the specification will finally bear.]

3316. Deutsch-Luxemburgische Bergwerks- und Hutten-
Akt.-Ges., and Klinkenberg, A. Manufacture
of mild steel and steel. (105548)'

3444. Barbet et fils et Cie., E. Cooling plates for con-
tinuous rectification apparatus. (105549)

4277. Westinghouse Machine Company. Double reduc-
tion gearing. (105551)

4806. General Engineering Company. Power plants.
(105554)

4951. Stuart, F. L. Apparatus for loading and unload-
ing. (105557)

5037. Macintosh, A. A., and Hunt, W. H. Method of and
means for equalising or maintaining an equili-
brium or any predetermined condition of pres-,
sure in retorts or offtake pipes in the manufac-
ture of coal gas or in the volatilisation of other
suitable substances. (105563)

5136. Douglas, T. Governors. (105567)

5174. Hovland, H. B. Apparatus for treating ores and
other materials. (105571)

Licences Granted by the Board of Trade.

The Board of Trade has granted Messrs. Bagley Mills
and Company Limited licences to work Patents Nos. 22862
and 23459 of‘1910 (Still).

CATALOGUES AND PRICE LISTS RECEIVED.

F. Braby and Company Limited (Eclipse Iron Works,
Peter shill-road, Glasgow).—Standardisation of construc-
tion has become a national necessity in some things, and
Messrs. F. Braby and Company emphasise the claim that
the standard unit with which they are associated has - a
long record of success to its credit. The application of
this principle minimises the work of designing, calculating,
drawing, etc. Obviously, if shop operations are stan-
dardised, and standardisation is carried out to exactitude
in materials, it is possible to reduce working costs to the
lowest level. The moral needs no enforcing if British
engineering is to fulfil the destiny so often attributed to it.
We note that the company’s designs are checked from
calculations, and that erection drawings furnish full infor-
mation for assembling standard units, so that a purchaser,
if so minded, can erect a structure with any semi-skilled
labour obtainable in his own neighbourhood. The tabular
matter in the booklet is likely to be of great service.

John Davis and Son (Derby) Limited. — So many
advances have been made by this company in mechanical
efficiency, that an isolated reference to some item scarcely
does iustice to the resources of ingenuity exemplified at
the All Saints Works. Nevertheless, following our recent
references to the company’s productions, we must add a
few words concerning the underground re-lighter for
miners’ safety lamps.- Leaflet 1740 A explains the con-
structional features, which are characterised by the Davis
touch of thoroughness throughout. The chief features are
the igniting of lamps of various heights with either side
or centre contact, magneto with chain drive (no danger of
broken teeth through use of cog wheels), no accumulator
charo-ing necessary, no trouble through wet condition, no
igniting unless the bell is closed and clipped, no spark
obtainable when closed unless the lamp is in position, the
ready option of preventing the clutch operating, and the
ease with which any necessary repairs can be made in the
pit. The leaflet is neatly illustrated.

Siemens Brothers Dynamo Works Limited (Caxton
House, Westminster).—The new publication dealing with
rotary converters is a timely production, for the demand
for plant capable of converting polyphase alternating cur-
rent into direct current, and vice versa, steadily grows,
and is likely to increase at a still more rapid rate after
the war. The tendency to generate power in large quan-
tities by the use of turbine-driven generators of great
output, must be considered in relation to the fact that
generators capable of an output suitable for present-day
demands can be built only as alternating current machines.
Practically every new power scheme implies the use of
converting plant. The booklet before us contains a
description of the company’s plant of this type, in addi-
tion to much useful general information relating to con-
verters. One section deals with the control of voltage,
the limitations as well as the capabilities being clearlv
expressed. An appendix sets out the particulars which
are required in order that a tender for a converting plant
of this type may be prepared, and these details have the
practical advantage of saving correspondence on the part
of those who observe them.

General Electric Company Limited (67, Victoria street,
London).—Three recently issued leaflets—V2088, dealing
with moulded insulation terminal blocks; L 2093, concern-
ing haulage road signalling in collieries; and 0 2104,
relating to the “Kingsway” miner’s lamp—indicate the com-
pany’s progressive work in mining equipment. The
haulage road signalling offers an excellent instance of
development, for it departs from the ordinary systems by
using one line wire to serve as pull wire and current
carrier of the line circuit. The main feature is the closed
circuit principle, commencing from “earth” to a battery
of cells, and continuing through the patent interrupters
(illustrated in leaflet) inserted at various points in the
line. The system finishes with an efficient earth point or a
return through the return wire. In the “Kingsway”
miners’ electric hand lamp, the chief points considered are
efficiency of illumination over the full run of 9 or 10 hours,
strength of construction, durability of parts, and freedom
from corrosion. The lamp has been approved by the Home
Office, and favourably received by the mining industry.
The “ Witton ” terminal blocks represent another phase of
the company’s range of activities. These blocks are made
in many varieties for improving the reliability and appear-
ance of small motors, and a number of diagrams in the
leaflet show the different forms of connection.

Partnerships Dissolved.—The London Gazette announces
dissolution of the partnership of F. W. Ratcliff and G. H.
Pearson, iron masters, the Anchor Iron Works, Oldbury;
and of M. Hoare and F. R. Pardow, trading as the Dry-
brook Folly Colliery Company.