236

THE COLLIERY GUARDIAN.

February 4, 1916.

ABSTRACTS OF PATENT SPECIFICATIONS
RECENTLY ACCEPTED.

1387 (1915). Improvements in and relating to Boiler and
like Furnaces. W. H. Holehouse, of 188, Cliffe Wood
Mount, Shipley, Yorkshire. — Relates to improvements in
boiler or like furnaces, and particularly to mechanically-
moved fire bars in furnaces provided with troughs, over which
the bars are arranged, the moving bars being designed to be
operated in conjunction with suitable feeding hoppers or
mechanical stokers, and arranged in combination with the
said troughs to form one complete self-contained apparatus.
The moving bars will be in the form of an endless chain or
chains, and the combination has advantages■over ordinary
chain grate bars arranged in combination with transverse
troughs. Fig. 1 represents an elevation of the apparatus,
partly in section; fig. 2 represents a part plan, partly in
section. A series of bars in the form of links Li are mounted,
adapted to be actuated by suitable rollers or toothed wheels
L1 from a suitable scurse of power, and bars with serrated
openings are preferred, as .in patent No. ,1689/12. The
wheels L1 for these bars or links L are carried in or on a
suitable frame F, provided with wheels or runners F1, whereby
the apparatus may be introduced into the furnace to receive
the runners in the usual manner. Guide rollers G may be
arranged across the frame to guide and support the moving
bars or links. The front of the apparatus will, in the acting
position, extend from the front of the furnace in such,wise that
fuel from a hopper or stoker S may be directed thereon, and

to allow air to pass in at the sides. Under the fuel opening in
the furnace, and carried from , the said frame, are mounted
bearing plates B, adapted to close what would otherwise be
openings through the bars against air from below, and at the
same time to guide and support the chain grate bars L. The
upper face of these plates is in a line with the upper face of
the troughs T, which are longitudinal, and preferably, pro-
vided with air and steam admission means, as in patent No.
28643/10. The steam pipe S ending in jets Sl projecting into
the openings T2 of troughs T assists in helping the. air,
admitted through suitable apertures in the frame or.carriage,
into the troughs, this being the only point wdiere air is
admitted through the bars ; and the troughs may have hit
and miss ash clearing devices in their bases, suitably operated,
for example, from the shaft operating the mechanism, to allow
the accumulated ash to fall through. . Suitable fire bricks or
linings will be carried by the frame where necessary, and >air
sealing plates will be placed towards the rear of the apparatus,
and where desired side bearing plates or rollers will be pro-
vided for the sides of the chain to w7ork against. (Three
claims.)

; (d) with packing glands

at

plug, and

fa. 2.



3669 (1915). Automatic Boiler Feed Admission Regulator.
J. N. Ellis, of “ Thea,” Canonbury-grove, Dulwich Hill,
New South Wales, Australia.—Relates to feed water regu-
lators of the kind comprising a casing in which is a parallel
plug valve having a trunnion at each end thereof adapted to
be connected .to a yoke in communication with a float, and
operated in accordance with the movements of the latter. The
automatic boiler feed admission regulator, according to the
invention, comprises a casing having a port in the form of an
elongated parallelogram, a parallel plug valve in said casing,
a . trunnion at each end of said plug valve adapted .to be con-
nected to a yoke, and means on said plug valve for elimi-
nating the risk of •trapping water in the feed pipe. The
advantages of a parallel plug are :—(a) It works more freely
particularly when subjected to heat; (5) it is less likely to
stick; (c) packing glands may be used at each end with less
likelihood of jamming the php
the ends to prevent escape
of water into the steam
space of the boiler, and (at
high temperatures) resulting
explosive reports the plug
may be comparatively free
in the casing. To eliminate
risk of rupture of the feed
pipe above the valve, a small
channel is arranged round
the plug to permit slight
leakage, and afford relief for
any expansion of water in
the said pipe. Fig. 1 is a per-
spective external view; fig. 2
is a vertical sectional eleva-
tion showing the cut away
type of plug in the “ valve-
open ” position. The casing
10 is inserted between the
two sections 11 and 12 of the
feed water pipe. The admis-
sion port 13 is narrow circumferentially of the ]/
very long axially, while the exit port 14 is circular. The
plug consists of two end portions of equal diameter, con-
nected by a bar, the peripheral arc of which is of equal
radius to the end portions, and constitutes the port closing
element. At each end of the plug is a trunnion, having a
squared end for engagement by the yoke 19, and each of said
trunnions passes through a stuffing box 20 screwed on to-the
end of the casing 10, and through a gland 21. The end faces
of the plug are recessed to reduce the area of the surfaces in
contact with the opposing faces of the stuffing boxes 20. To
eliminate the risk of trapping water in the feed pipe and
rupture of the latter by expansion of said entrapped water,
the plug is provided with a small leakage groove, which
ensures escape of water. The yoke 19 is in tw7o parts, and
between the corresponding front cranked ends 25 thereof the
lever 26, carrying the float 27, is pivoted at 28. Said lever
has a substantially “ T ” head 29, having a series of holes
30, through any of which .the . bolt 31 may be passed, to
adjust the vertical position of the float 27. The movement
of the yoke 19 is limited by permanent stops 32 projecting
from the valve casing. On‘ the opposite side of the casing
the cranked ends 33 of the yoke constitute an arm, which,
■when the float falls so far as to bring the plug to a position

beyond [that giving a full port opening, will contact with
and raise the stem 34 of a valve such as 35, and by opening
the same permit steam to pass* through pipe 36 to an alarm
whistle (not shown). (Three claims.)

304.1 (1915). Improvements in Miners' Safety Lamps.

John Davis and Son (Derby) Limited, and W. H. Davis,

both of All Saints Works, Derby.—Relates to the type of
lamp in which an .inner glass is employed, and has for its
object the provision of a' simple means

of carrying or securing such glass in
position whereby said glass may be
readily removed or replaced, together
with a chimney and reflector where
used as hereinafter explained; the
invention being applicable to existing
■ lamps. Fig. 1 is a vertical section;
and fig. 2 a sectional plan on line a—a
of fig. 1. The ordinary burner attach-
ment ring is replaced by a similar
device b, carrying on pillars c or the
like a gallery d, allowing sufficient
space to admit the necessary air for
combustion purposes. The inner glass
e is carried in any suitable manner
by this gallery, and is preferably
enveloped at the top by the lower end
f1 of the chimney /, the whole con-
stituting the combustion tube; these
parts are arranged separately from
the two gauzes or other parts of the
lamp, so that upon unscrewing the
oil vessel i from the upper or outer
part k of the lamp, the chimney f and
inner glass e are withdrawn with the

7^7

oil vessel, and are immediately 'accessible. There may also
be a reflector g of any suitable description, and the latter
with the chimney f and inner glass e may be secured
together and in position as follows :—An upwardly extending
plate h may be fixed to the gallery d to engage and hold a
reflector g depending from the lower part f1 of the chimney /,
said reflector sliding down- and being held by the sides, or
otherwise secured to the above plate; the inner glass being
surrounded at the top by the lower part f1 of the chimney /,
the whole is thus securely held in a central position. (Three
claims.)	'

2

5759 (1915). A New or Improved Pit Prop or the like.
Job Edwards Limited and J. T. Beard, both of Eagle Tube
Works, Portway-road and Junction Works, Potters-lane,
Wednesbury, Staffordshire.—The invention comprises an
improved pit prop of the tubular type, with a cap at the
top, and a base or wooden block within a removable base
at the bottom. The prop comprises in combination a single
structure, tubular prop, adapted to receive a concrete or
like filling, a cap plate, preferably crowned, rigidly secured
at the top of same, and having a solid upper surface bearing
on the prop,' and an enlarged base bpen at the bottom, and
secured to the prop by screwing or by bolts or the like, but
having a solid bearing for the prop to relieve the securing
bolts, .the base embracing a wooden or like peg. Fig. 1 is
an elevation; and fig. 2 a central
vertical section.. A cap plate a	1

of suitable . shape has a projec-	■ &

tion b. on its underside adapted
and arranged to take into the iTSi
upper extremity of a metal tube c II 9 .
and suitably secured thereto by'
such means as a bolt passing | |
through the upper end of the tube
and through the projection on the	/gPnl

cap plate. The lower end of the III
tube c is preferably externally I J
screw threaded to engage with a	■

screw threaded upper recessed or
socket portion e on a base d. The i I |
base d, which is of suitable dimen-
sionis . to give . stability to the	IfflFy

structure, .is also recessed or	wT

hollowed on its underside as at f *
to receive a wooden foot or peg
g, which is preferably tapered or wedge shaped
ground, and so form a secure anchorage at

the prop. A substantial web or wall. h should be left
between the two recesses or sockets e and f of the base.
The cap plate or platform member a may be slightly
crowned on its upper surface, or otherwise shaped to enable
an effective bite to be obtained against the roofing members,
or to enable a wedge or w7edges to be used to ensure a
tight abutment between the prop and the structure to be
supported. The tubular portion of the prop is preferably
filled with concrete or other suitable filling j, which should
be allowed to set thoroughly before the prop is subjected
to the strain of the load it is to support. (One claim.)

to enter the
the foot of

4857 (1915). Improvements in Rope Grips. J. C. Doust,
of 8, St. Alban-street, and J. H. Lumbers, of 35, Roxborough-
street East, Toronto, Canada.—Relates to devices by means
of which a rope may be quickly and securely fastened without
any tying knots or wrapping of the line on cleats, and is
particularly adapted to engage the rope with the grip with-
out threading it through the same. Fig. 1 is a front elevation
in a rope gripping position ; fig. 2 is a similar view, showing
the cheek piece and tail removed, the rope gripping lever
being in section; fig. 3 is a side elevation; and fig. 4 is a
view showing the position of the parts when a rope is being
introduced into or removed from the grip. 1 is a plate which,
when the device is intended to be rigidly secured to a
stationary part, is provided with a plurality of screw holes 2,
and a hook 3. A pivot pin 4
is preferably formed integral
with the plate 1 substantially
at its centre. Adjacent the
corner opposite the hook is
the abutment 5, preferably
formed' with an abrupt
shoulder 6 extending across
the middle, and in alignment
with the hook 3 and the pin 4.
The abutment has a convex
upper surface facing towards
the pin 4. On the pin 4 is
pivoted the bent lever 7. One

end of this lover is so positioned that when the lever is
rocked, this end will firmly grip the rope, pressing it against
the abutment and the shoulder thereon. The pressure to
effect this gripping action is provided with the rope itself,
which engages the other end of the bent lever (fig. 2). In
order to assure suitable pressure against the lever by the
rope, a pin 8 on the plate 1 is in substantial alignment with

the ends of the lever when the latter is in engagement with
a -rope (fig. 2). In this case the rope cannot be led so that
it will not contact with the upper end of the bent lever. To
prevent the rope accidentally disengaging by an outward
movement away from the plate 1, the lever has a cheek piece
9, which extends beyond each of the ends of the lever (fig. 1).
This cheek piece forms an efficient guard at these points.
Between the ends of the lever the cheek piece is cut away on
a curve, concentric with the convex surface of the abutment
when the parts are in the position shown in fig. 4. In this
case a rope is easily pushed in over the abutment and behind
the cheek piece to engage the upper end of the lever. The
lever is provided with a tail 10, which overbalances the lever
and causes it to assume the rope gripping position, thus pre-
venting any accidental disengagement of the rope if the part
above the grip becomes slackened.. This tail also is directed
both outwardly and downwardly (fig. 1), and serves to prevent
the rope slipping up over the plate when being placed in
position in the grip. (Six claims.)

15753 (1915). Improvements in Apparatus for Ascer-
taining the Direction of Boreholes. C. L. Carlson, of
Mastersamuelsgatan 34,. Stockholm, Sweden; and G.
Bergstrom, of Wahrendorffsgatan 4, Stockholm, Sweden.—
Relates to apparatus for ascertaining the direction of bore-
holes, and provides means by which deviations of a borehole
can be registered and measured. The apparatus. consists of
a. tubular shell adapted to be inserted in a drill guide, and
containing two pivotally mounted pointers, each connected bv
means of a stretched wire or string with a point of the drill
guide situated at a suitable! distance from the apparatus in
such a manner that the pointers always occupy a position in
the longitudinal direction of the wires or strings, thus indi-
cating any curvature of the drill guide and the borehole
respectively between the outer ends of the said wires or
strings. Further, the shell contains pistons adapted to reci-
procate therein, and, by means of hydraulic pressure created
in the drill guide, to move against the points of the pointers,
so as to register the deviation of the pointers. Finally, the
apparatus is provided with a receptacle containing an etching
liquid, or with a pendulum or a plumb bob, the deviation of
which is registered in any manner similar to the registration
of the deviations of the pointers. In the drawing, which
shows a longitudinal section of the apparatus, 1 denotes a
tubular shell adapted to be inserted at any point in a drill
guide, and, preferably, of the same width as the tube of the
drill guide, so that it may be screwed in between two sections
of the drill guide. The shell 1 contains two inner tubes 2
and 3, and passed through the outer end walls 4 and 5 respec-
tively of said tubes 2 and 3 are two pointers 6
respectively, each provided at the passage through
the end wall with a ball and socket joint, which
permits the pointers to be swung in any direction,
and-at the same time presents a tight fit. The
outer end of each pointer 6, 7, is connected with
one end of stretched wires or strings 8 and 9
respectively, the other ends of which are secured to
central holders inserted in joints of the drill guide
at a suitable distance from the point at which the
apparatus is inserted in said drill guide, say, 5 m.,
so that the distance between the outer ends of the
wires or strings amounts to about 10 m. Inserted
in the ends of the tubes 2 and 3, facing each other,
are tightly fitting pistons 10 and 11, forced by
springs 12 and 13 respectively in the direction out
of the ends of the tubes 2 and 3 respectively, so
that the pistons 10, 11, when subjected to the
action of a certain high pressure on the outer ends
of the pistons will move inwardly -in the tubes.
The inner end surfaces of said pistons are pro-
vided with a suitable coating, as, for instance,
lead plates 14 and 15 respectively, in which an
impression is made by the point of the corre-
sponding pointer 6, and 7, when the - piston is
moved inwardly in the tube on account of the
hydraulic pressure mentioned. Further, each of the ’
10 and 11 is provided with a guiding pin or the like i

17	.respectively adapted to slide in a slot formed in the corre-
sponding tube 2 and 3, and preventing the pistons from turn-
ing in the tubes. Connected with the pointer 7 is a sleeve

18	enclosing, a glass .tube 19, which contains an etching
liquid, for instance, diluted hydrofluoric acid, said liquid
effecting, when the apparatus is kept in a certain position
for a Jong time, an etching of the glass, so that the position
occupied by the apparatus during said time in relation to
the perpendicular can be ascertained. Preferably, the pointer
7 is so mounted that It cannot turn about its longitudinal
axis relatively to the tube 3. Between the tubes 2 and 3
on the one hand, and the shell 1 on the other hand, channels
are provided, which convey water introduced in the drill
guide and the shell into the space 20 between the outer ends
of the pistons 10, 11. (Three claims.)

23632 (1914). Improvements in Railway and like Hopper
Wagons. The Metropolitan Carriage Wagon .and Finance
Company Limited, of Saltley, Birmingham; and W. H.
Wigley, of Dora-road, Small Heath, Birmingham.—The
invention relates to improvements in railway and like hopper
wagons adapted particularly to enable material to be dumped
either between or outside of the rails, .and comprises the
combination, in wagons having doors of the curved type, of
side doors operated by external rock shafts arranged out of
the path of the material passing through the doors .and
connected to the doors by links, and central oppositely
oscillating curved doors operated from a common longitudinal
rock shaft arranged to the side of the central opening and
connected to the doors by lateral cranks and links. One of
the links preferably carries an adjustable coupling, as is
also the case of the links for the side doors. As an example,
the two central doors are arranged, when closed, to fill the
space between the upper edges of two open plates, disposed
at a convenient angle, which act as chutes down which the
material flows for side dumping. The side doors are also
arranged so that, when closed, they fill the space between
such upper edges of the open plates and the lower edges
of the bottom plates of the wagon, which are also at a
convenient angle. The two rock shafts for the side doors are
arranged beneath each of said bottom plates respectively, and
the single rock shaft for the two central doors is arranged
beneath one of said plates and behind one of the said doors.
The connecting links, etc., connecting the shafts with the
doors are provided exteriorly to the hopper, and at the ends
thereof so as not to foul the dumping openings. Fig. 1 is
a cross sectional view of a hopper wagon with the invention
applied ; fig. 2 is a detail view of the hinging of the doors.
Mounted below the hopper bottom a of the wagon, and
between end plates, or divisional plates 5, according to
whether one or more than one system of doors are arranged
longitudinally of the wagon, are two plates c at a suitable
angle, whose upper edges lie approximately in the planes