Improvements in Miners' and the like Safety Lamps.
Year: 1896

page_text: Date of Application, 12th Dec., 1890
Complete Specification Left, 13th Sept., 1897-Accepted, 16th Oct., 1897
Date of Application, 12th Dec., 1890
Complete Specification Left, 13th Sept., 1897-Accepted, 16th Oct., 1897
PROVISIONAL SPECIFICATION.
Improvements in Miners' and the like Safety Lamps.
I, JAMES ROSE, of Oak Cottage, Denaby Main, Rotherham, in the County of
York, Mechanical Engineer, do hereby declare the nature of my said Invention
to be as follows:-
The object of my Invention is to provide the means of more effectually locking
miners' and the like safety lamps, than is the case in such lamps as generally
employed.
One of the methods commonly in use is to connect the glass case and upper
part of the lamp to the oil vessel or lower part, by means of a screwed joint,
and by means of this screwed joint the light may be regulated. It is therefore.
arranged that the upper part of the lamp may be free to turn a sufficient distance"
up and down for this purpose when locked. This is effected by means of a hinged
catch, which is attached on to the top of a lug or bracket on the side of the oil
vessel, by means of a pin, and so arranged that, when the glass case is screwed
down on to the oil vessel, the catch can be turned towards the flange of the
glass case, so that a projecting nib on the catch overlaps the flange, but at the
same time it leaves sufficient space to allow of the glass case being raised and
lowered the prescribed distance.
When in position to lock and secure the lamp, a hole in the end of the catch
furthest from the hinge is brought opposite to a corresponding hole on the
previously described lug; a lead rivet is then inserted through the holes and by
means of a pair of specially formed pliers the ends of the rivet are headed and
sealed.
One of the defects of this arrangement, however, is that it is possible by
exercising sufficient force on the screw to draw or break the rivet and release
the lock.
Now the object of my Invention is to obviate this defect which I da in the
following manner.
Instead of the hinged catch herein previously referred to being made to turn
on the top of the lug which is attached to the side of the vessel, I so construct
and form the lug and the catch that the catch fits over the lug like a case, so that
when the catch is turned over the lug, the lug is entirely enveloped or boxed in
by the catch, and when in that position a lead rivet is inserted through holes
passing through both the catch and the lug, where it is secured and sealed in a
manner similar to that already described.
The catch is likewise provided with a nib which allows for the glass case being
screwed up and down within a prescribed distance.
By means of the particular construction of the catch and lug herein described,
the rivet is protected from any tensile strain being brought to bear upon it,
which is not the case in the methods previously described.
As a further protection to the rivet, I sometimes provide a recess on the side
of the oil vessel, for the reception of the open edge of the catch when it is

page_text: closed and locked, so that no instrument can be employed to shear the rivet by
transverse strain without evidence of such tampering with the lock being visible.
As a modification of the arrangement herein described, I sometimes simplify
the form of the catch so that instead of the lug being entirely enveloped or boxed
in by the catch, I provide a flange at the hinge end of the catch to pass under the
lug or I provide a flange at the rivet end of the catch to pass under the lug. Or
as a further modification I form the lug with a jaw or recess to receive the rivet
end of the catch, so that the rivet passes first through the top part of the jaw,
then through the catch and then through the bottom part of the jaw, or the rivet
may be passed through the catch and the lug clear of the jaw. The object in
all cases being the same, viz. to prevent the fracture of the rivet by straining the
catch when it is locked by the action of the screw on the glass frame or otherwise.
Dated this 10th day of December.
R. HEBER RADFORD,
Agent for the Applicant.
Improvements in Miners' and the like Safety Lamps.
I, JAMES ROSE, of Oak Cottage, Denaby Main, Rotherham, in the County of
York, Mechanical Engineer, do hereby declare the nature of my said Invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The object of my Invention is to provide the means of more effectually locking
miners' and the like safety lamps than is the ease in such lamps as generally
employed.
One of the methods commonly in use is to connect the glass case and upper
part of the lamp to the oil vessel or lower part, by means of a screwed joint,
and by means of this screwed joint the light may be regulated. It is therefore
arranged that the upper part of the lamp may be free to turn a sufficient distance
up and down for this purpose when locked. This is effected by means of a hinged
catch which is attached on to the top of a lug or bracket on the side of the oil
vessel by means of a pin, and so arranged that when the glass case is screwed
down on to the oil vessel the catch can be turned towards the flange of the
glass case so that a projecting nib on the catch overlaps the flange, but at the
same time it leaves sufficient space to allow of the glass case being raised and
lowered the prescribed distance.
When in position to lock and secure the lamp a hole in the end of the catch
furthest from the hinge is brought opposite to a corresponding hole on the
previously described lug; a lead rivet is then inserted through the holes and by
means of a pair of specially formed pliers the ends of the rivet are headed and
sealed.
One of the defects of this arrangement, however, is that it is possible by
exercising sufficient force on the screw to draw or break the rivet and release
the lock.
Now the object of my Invention is to obviate this defect which I do in .ne
following manner.
My invention will be better understood on reference to the accompanying sheet
of Drawings, in which,
Fig. 1. represents the side elevation of a miners safety lamp fitted with one of
my improved catches. The catch being shewn open.
Fig. 2. is a plan of the same.

page_text: Fig. 3. is likewise a side elevation of the said lamp shewing the catch closed
with the glass case screwed down into its lowest position under the oil vessel.
Fig. 4. being a plan of the same.
Fig. 5. is also a similar elevation with the catch closed but shewing the glass
case screwed up to the highest limit allowed by the projecting nib on the catch.
Fig. 6. is a front elevation of the lamp shewing the catch closed.
Fig. 7. illustrates one of the modifications of my improved catch wherein a
flange is provided at the hinge end of the catch to pass under or between two ribs
or flanges b 3 of the lug.
Fig. 8. shews a catch with a flange provided at the rivet end to pass under the
lug.
Fig. 9. shews the further modification wherein I form the lug with a jaw or
recess to receive the rivet end of the catch.
Instead of the hinged catch as used in the old system herein previously referred to
being made to turn on the top of the lug which is attached to the side of the vessel, I so
construct and form the lug and my improved catch that the catch, a, fits over the
lug, b, like a case so that when the catch is turned over the lug the lug is entirely
enveloped or boxed in by the catch, and when in that position a lead rivet, c, is
inserted through holes passing through both the catch and the lug, where it is
secured and sealed in a manner similar to that already described.
The catch is likewise provided with a nib, d, which allows for the glass case, c,
being screwed up and down within a prescribed distance.
By means of the particular construction of the catch and lug herein described,
the rivet is protected from any tensile strain being brought to bear upon it,
which is not the case in the methods previously described.
As a further protection to the rivet, I sometimes provide a recess, g, on the side
of the oil vessel, f, for the reception of the open edge of the catch when it is
closed and locked so that no instrument can be employed to shear the rivet by
transverse strain without evidence of such tampering with the lock being visible.
As a modification of the arrangement herein described, I sometimes simplify
the form of the catch, a, so that instead of 'the lug, b, being entirely enveloped or
boxed in by the catch, I provide a flange k at the hinge end of the catch to pass
under or between two ribs or flanges b 2 of the lug b (Fig. 7), or I provide a
flange at the rivet end of the catch to pass under the lug (Fig. 8), or as a
further modification I form the lug with a jaw or recess j to receive the rivet end
of the catch (Fig. 9), so that the rivet passes first through the top part of the jaw,
then through the catch and then through the bottom part of (the jaw, or the rivet
may be passed through the catch and the lug clear of the jaw. The object in all
cases being the same, viz., to prevent the fracture of the rivet by straining the
catch when it is locked by the action of the screw on the glass frame or otherwise.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is;
1. In the locking appliances of miners and the like safety lamps the improved
catch, a, made like a case to fit over and envelope the lug, b, in the manner and
for the purposes substantially as herein described and illustrated in Figs. 1 to 6,
in the accompanying sheet of Drawings.
2. In the locking appliances of miners and the like safety lamps, the improved
catch, a, so formed that instead of the lug being entirely enveloped, as described
in Claim 1, a flange, k, is provided at the hinge end of the catch to pass under
or between two ribs or flanges b1, b2 of the lug, b, substantially as herein described
and illustrated in Fig. 7. of the accompanying sheet of Drawings.
3. In the locking appliance of miners and the like safety lamps, the improved
catch, a, so formed with a flange, 7, at the rivet end to pass under the lug, b, in
the manner and for the purposes substantially as herein described and illustrated
in Fig. 8. of the accompanying sheet of Drawings.

page_text: 4. In the locking appliances of miners and the like safety lamps forming the
lug, b, with a jaw or recess, j, to receive the rivet end of the catch, a, in the
manner and for the purposes substantially as herein described and illustrated in
Fig. 9, of the accompanying sheet of Drawings.
Dated this 11th day of September 1897.
R. HEBER RADFORD,
Agent for the Applicant.