1010

THE COLLIERY GUARDIAN.

May 8, 1914.

The lamp is made by the late Wolf Safety Lamp
Company Limited, Leeds.

The Hay dock Colliery Pattern Lamp.

This lamp, the general design of which is shown in
fig. 18, is a double-gauze, flame, oil lamp, with air-feed
through vertical holes in the middle ring. It consists
of the following essential parts :—

(1.) Bonnet or Shield of riveted steel, with a securely
riveted brass, steel, or iron crown. The bonnet is
furnished with outlet holes so arranged that the bottoms
of the holes are not less than T3y in. above the top of the
outer gauze. The crown may be pierced with outlet
holes not greater than in. in diameter.

(2.) Middle Bing of brass, riveted to the bonnet, and
furnished with vertical air-inlet slots of total area not
exceeding 1*2 square inches.

Pillars, five, so arranged that a straight line touching
the exterior parts of adjacent pillars does not touch the
glass.

Bottom Bing of brass.

(3.) Gauzes of not less than 28 S.W.G. steel wire,
784 meshes to the square inch, with double folded lap
seams, formed to fit flanges of the inner and outer base
rings, and so secured to the same by punch indentations

71 O N BELOW.

B i	B

|o

K f ? a. AtUy’-Xj]

Fig. 18.—Haydock Colliery
Safety Lamp.

(R. Evans and Company Limited.)

or rivets as to make strong and flametight joints. The
arrangement of the gauzes in the lamp is that shown in
fig. 18, and is such that they form the seating necessary
to hold the glass firmly in position, thus preventing the
possibility of the lamp being put together without the

gauzes.

Inner dimensions. Outer gauze. Inner gauze.
Height from shoulder of

hoop................. 3|in.	±yin.	...	3| in. ± f in.

Diameter at top....... ly in.	if-in.	•••	lyyin. ±|in.

Diameter at bottom.... 2 in.	± f in.	...	1-^ in. ifin.

(4.) Glass, of an approved type, cylindrical in form,
and within the dimension limits and bearing the size
mark specified below: Furnished with top and bottom
asbestos washers to ensure flametight joints with the
gauzes and retaining ring.

E xternal diameter ...........

Height.......................

Size mark ...................

mm.

mm.

( +0

1-1

± y mm.

56	mm.

57	mm.

66-57

(5.) Glass Betaining Bing, of brass, screw-threaded to
fit the bottom ring ; provided that the clearance between
the glass retaining ring and the oil vessel shall not be
so great as to make it possible, under reasonable
working conditions, to loosen the glass by forcing it
round in its seating to such an extent as to impair the
safety of the lamp.

(6.) Oil Vessel.—A. solid casting of brass, of capacity
sufficient to provide the required light for the required
time as specified, fitted with a flat f in. burner.

(7,) Locking Device.—A lead-rivet lock with a hasp or
lug secured to the bottom ring, and a staple or lug
soldered to the oil vessel.

(8.) Beflector.—The lamp may be fitted with a
removable reflector.

The lamp is made at the works of Messrs. Richard
Evans and Company Limited at St. Helens.

The Monk Bretton Colliery Pattern (M.B.C.) Lamp.

The Hickleton Main Colliery Pattern (H.M.C.) Lamp.

These lamps, the general design of which is shown in
fig. 19, are double-gauze, flame, oil lamps, with air-feed
through the middle ring.

Each consists of the following essential parts :—

(1.) Bonnet or Shield of riveted steel, with a separate
securely fastened crown. Furnished with outlet holes
immediately below the crown, provided that the bottoms
of the outlet holes are not less than in. above the top
of the outer gauze.

Bonnet Bing of brass, steel, or iron, riveted to the
bonnet, screw-threaded to fit the pillar ring and locked
thereto by means of a sliding pillar held in position by
the oil vessel. Furnished with vertical air-inlet slots of
total area not exceeding 1*3 square inches, the gauzes

being protected from a horizontal current through the
slots between the bottom ring and the pillar ring by
means of the inner flange of the bonnet ring.

(2.) Pillar Bing, Pillars (five, one sliding) and Bottom
Bing of brass, steel, or iron.

(3.) Gauzes, of not less than 28 S.W.G. steel or best
charcoal annealed iron wire, 784 mesbes to the square
inch, with secure flametight double-folded lap seams,
formed to fit flanges of the inner and outer base rings,
and so secured to the same by punch indentations as
to make strong and flametight joints. In the case of
the H.M.C. Lamp, the gauzes may be separated by a
solid metal ring of about y3y in. square section, forming

Fig. 19.—-Hickleton Main Colliery
(H.M.C.) and Monk Bretton Colliery
(M.B.C.) Safety Lamps.

(M. Lowrance and Son.)

a flametight joint between the gauze rings. The arrange-
ment of the gauzes in the lamps is that shown in
fig. 19.

Internal dimensions.	Outer gauze.	Inner gauze.
Height from shoulder of base ring 		4 in. ± i in. ...	3y in. i f in.
Diameter at top 		1| in. ± | in. ...	If in. ± | in.
Diameter at bottom		2 in. ± f in. ...	ly in. ± f in.
(4.) Glass:—  The  External diameter ..	M.B C. Lamp.  	 57	mm. <	f + 0 mm
Height 			 57	mm.	- 1 mm.  ± f mm.
Size mark			 57-57	

The H.M.C. Lamp

When the solid ring When the solid ring
between the gauze between the gauze
rings is used. rings is not used.
th - i •	4.	0 mm. ) „„ C +0 mm.

External diameter 56 mm. < n > 56 mm <	,

< — 1 mm. )	( — 1 mm.

Height ........ 57 mm. ± ' mm. 60 mm. ± f mm.

Size mark...... 56-57	56-60

(5.) Glass Betaining Bing.

(6.) Oil Vessel.—A solid casting of brass, or of brass
with a securely soldered brass bottom; of capacity
sufficient to provide the required light for the required
time as specified ; fitted with a flat T7y in. burner;
furnished or not with an electric igniter of the type
shown in fig. 19.

(7.) Locking Device.—A lead rivet lock with a per-
forated flange and a lug forming part of the oil vessel
and bottom ring respectively.

(8.) Beflector.— The lamps may be fitted with a
removable reflector.

The lamps are made at the works of Messrs. M.
Lowrance and Son, Barnsley.

Naylor s Protector Lamps, Types “ G ” “ H” and “ LT

These lamps, the general design of which is shown in
fig. 20, are modifications of the Marsaut “A” Lamp.*
They are double-gauze, flame, spirit lamps with air-feed
through vertical holes in the middle ring. Each consists
of the following essential parts :—

(1.) Bonnet or Shield, of riveted steel or iron. In
Type “ G- ” the base is turned under and secured to the
middle ring; in type “ H ” the bonnet is similar to that
of the Marsaut “ A ” Lamp; in Type “ I ” the crown and
bonnet are similar to those of the Marsaut “ B ” Lamp.*
In each type the bonnet is furnished with outlet holes
round the top, provided that the bottoms of the holes
are not less than y3y in. above the top of the outer gauze.

(2.) Crown, of brass, steel, or iron, supported by three
or more steel or iron pillars, fitted or not with a baffle
ring.

(3.) Middle Bing of brass, steel, or iron provided with
vertical air-inlet holes of total area not greater than
0’6 square inch: the inner flange prolonged or not to
form a baffle ring; five lower pillars and bottom ring,
of brass, steel, or iron.

(4.) Gauzes, of not less than 28 S.W.G. steel wire,
784 meshes to the square inch, with flametight double-
folded lap seams, with or without a metal liner, formed
to fit flanges of the inner and outer base rings. The
arrangement of the gauzes in the lamps is one or other
of the arrangements shown in fig. 20 and in the previous
order.*

* See Colliery Guardian, September 26, 1913.

Internal dimensions.	Outer	gauze. Inner gauze.

Height to shoulder

of base ring...... 4-A in.	±	± in.	...	4	in. ± f	in.

Diameter at top ... Ill in.	±	A in.	...	If	in. ± -A	in.

Diameter at bottom	2 in.	±	A in.	...	ly|	in. ± -A	hi.

The lamps may be fitted with a Mueseler chimney and
horizontal gauze.

(5.) Glass :—

External diameter ...... 60 mm. f + ? mm‘

( — 1 mm.

Height ................. 57 mm ±y mm.

Size mark .............. 60-57 or J.H.N. 5

Provided that the lamps may also be made to take a
glass of the following dimensions :—

External diameter ...... 60	mm. +<? mm’

— 1 mm.

Height ................. 60	mm. mm.

Size mark ............. 60-60	or J.H.N. 6

(6.) Glass Betaining Bing, of brass, screw-threaded
externally to fit the bottom ring and internally to take

(7.) A Brass Extinguisher recessed to fit a locking
bolt held by a flat spring which retains the extinguisher
in position. The extinguisher is screwed internally to
take the burner.

(8.) Spirit Vessel.—A casting of brass, with burner
securely screwed into same and soldered, and a brass or
iron bottom securely soldered on. Of capacity sufficient
to pi’ovide the required light for the required time, and
provided with suitable absorbent material. The burner
takes a wick about J in. in diameter. The spirit vessel
is capable of being unscrewed when the lamp is locked,
to an extent sufficient for the adjustment of the wick,
but not sufficient to impair the safety of the lamp.

(9.) Locking Device.—A lead-rivet lock of the type
shown in fig. 20.

The lamps are made at the works of J. H. Naylor,
Esq., at Wigan.

Fig. 20.—Marsaut
“G,” “H” and “I”
Lamps.

(J. H. Naylor.)

oil I
w

Fig. 21.—Marsaut
“ F ” Lamp.

(J. H. Naylor.)

The Marsaut “ F” Lamp.

The Marsaut “ F ” Lamp, the general design of which
is shown in fig. 21, is a modification of the Marsaut “ A ”
lamp*, and is similar to it in all but the following
respects:—

(1.) The Crown is of brass, and is supported by four
steel or iron pillars.

(2.) The Bonnet is removable, and is locked to the
crown by a lead-rivet lock. The bonnet also is furnished
with air-inlet holes about If in. from the base, and of
total area not exceeding IT square inches.

(3.) The Middle Bing is furnished with a baffle plate
which protects the gauzes from a horizontal current, as
shown in fig. 21.

(4.) The Locking Device may consist of a lead-rivet
lock with a lug on the bottom ring, and a flange on the
oil vessel perforated with a series of holes in order that
the wear in the screw threads may be taken up.

The lamp is made at the works of J. H. Naylor, Esq.,
at Wigan.

Messrs. Patterson and Company’s Safety Lamps,
Type B. 3 and Type B. 4.

These lamps, the general design of which is shown
in fig. 22, are modifications of the Messrs. Patterson
and Company’s Lamp, Type B. If, and are similar to it
in all but the following respects :—

(1.) Bonnet or Shield of steel, with riveted seam and
with a separate securely-fastened crown; or of seamless
steel, the bonnet and crown being in one piece.

(2.) The Bonnet Bing of the B. 4 Lamp is provided
with additional horizontal air inlet slots of total area
not exceeding 0’7 square inch, and a wide flange on the
outer gauze protects the gauze from a direct horizontal
current.

(3.) Gauzes.—The arrangement of the gauzes in the
lamps is that shown in fig. 22. This arrangement is
provisional only, and will cease on July 1, 1914, except
for lamps in use on that date.

The lamps are made at the works of Messrs.
Patterson and Company, at Trafalgar-street, Newcastle-
on-Tyne.

* See Colliery Guardian, September 26 1913.

t See Colliery Guardian, August 8, 1913.