Year: 1898

page_text: Date of Application, 9th July, 1893
Complete Specification Left. 8th Apr.. 1899-Accepted, 17th June, 1899
I, RICHARD KÄS, of Aspangstreet 13, Vienna, in the Empire of Austria, Works
Foreman, do hereby declare the nature of this invention to be as follows:-
The object of my invention consists essentially in throwing out of circuit an
incandescent lamp before the bulb or envelope of the same is broken by a shock
or blow, so as to prevent the ignition of explosive gases or other substances in
consequence of the burning up of the carbon filament of the broken incandescent
lamp. The device invented by me is more particularly adaptable to miners'
electric lamps.
The accompanying drawings show this improved device with all its details.
Fig. 1 is a view of the lamp complete, Fig. 2 shows the device after the removal
of the incandescent lamp, of the glass shade and of the reflector; Fig. 3 is a
vertical central section of the whole lamp; Fig. 4 is a plan of the ring i,
Fig. 5 is a cross section of this ring i, Fig. 6 shows the normal position of the
contact maker (lamp extinguished), Fig. 7 shows the position of the contact maker
when the same is closed (lamp burning). Fig. 8 is a view corresponding to Fig. 2
of a modified form of the protective device.
Upon a wall a is fixed the ring b. Within this ring and on the bottom of the wall
or plate a is arranged the contact piece c (Fig. 2) the latter being screwed home and
carrying the wire the end of which has the form of a hook. On the opposite
side is placed the contact piece which carries at the top another wire whose
free end is bent over to form a hook. The two hooks and serve to suspend
the incandescent lamp and to convey the current thereto. The plated carries
a contact maker and breaker lever or key e fulcrumed on o, (Figs. 2 and 6)
and provided at the top with a rounded off pin e¹ (Fig. 3). The sliding contact f
(Figs. 1, 2, 3, 6, 7, and 8) is guided in a slot of the ring band is prevented
from slipping down by the arm of the two armed spring, bearing upon
the pin its inward motion being limited by the pin f striking the lever or
key e. The other arm g₁ of this spring 9, g, bears upon the lever or key e
and tends constantly to bring the same into contact with the contact piece
which can only be prevented by the springing therebetween of the sliding
contact f which is pulled inwardly by the spring g. The double spring g, g', is
fixed by a screw to the piece b3 which is likewise screwed on the wall or plate a:
as are the parts b, c, d, and c³, (Fig. 2). The reflector n (Fig. 1) is screwed on
to the parts b¹ and b³.
Upon the outer periphery of the ring b are screwed the four springs h (Fig. 2)
which are carried by the small screws h¹. The latter springs have for their
object to hold the ring i, to which the annular box (Figs. 1 and 3) is fixed by
means of screws m² passing likewise through the pieces m on the one hand and
through the holes m¹ formed in the bar & Fig. 4, fixed rigidly to the said ring on
the other hand, while the screws m² pass likewise through the angles of the
springs h (Fig. 1) bent at their extremities in the form of a hook, in such a position

page_text: that the said ring with its annular box r is held above the plate a and is
held fixed at the same time by the angles of the springs h and the screws_m²
passing through them to such an extent that it can only be moved by exerting
a certain amount of pressure cither from the side or upon the whole screwed hemi-
spherical glass or cover so as to move the rod k firmly fixed to the ring i and
provided centrally and downwardly with a small semi-circular cavity (Fig. 5)
and press the same upon the pin e¹ of the contact maker or breaker in order to
depress the latter and thus raise the lever or key e whereupon the contact is broken
and the lamp is extinguished.
Upon the ring b is screwed another ring (Fig. 3). The rod k of the ring i
rests in the recesses 62 of the ring b. Upon the ring is screwed the ring S
wherein is fitted the hemi-spherical glass above referred to. The fitting up is
carried out in such a manner, that the ring i is first placed upon the ring band
is screwed up with the annular box by means of the small screws m², then the
ring is screwed upon b, after which the reflector n is screwed in position, while
the incandescent lamp q is suspended to the wires c¹, e², and is held besides at
its pointed end by the spring p fixed to the reflector n. Over the whole apparatus,
the rings with the hemi-spherical glass or cover placed therein is finally screwed
upon the ring i.
This lamp operates in the following manner: To allow the electric current
proceeding from the source of electricity placed at the back of the plate a (Fig. 3)
to enter the lamp, the sliding contact is drawn down. As shown in Fig. 7 the
lower part of the contact lever e comes to bear, under the action of the spring g',
upon the contact piece c³, so that the electric current introduced through the
latter passes along the wire 2, enters the lamp and follows the wire c¹ as far
as the contact piece c, the circuit being thus closed and the lamp burning. If
now the glass of the ring i or the ring itself was to receive a knock or a blow
this ring would be sunk, the rod k would depress the pin e¹, the lower part of the
contact making or breaking key or lever e would be raised, the slide urged on
by the pressure of the spring y would spring forward, so that this lever or key
would come to bear on the slide f as at Fig. 6, and would break contact with
the contact piece c³. The current would then be broken and the lamp
extinguished.
Fig. 8 shows a modification whereby when the glass is broken, ignition cannot
be communicated to the surrounding atmosphere without thoroughly smashing
the lamp, that is to say that when the lamp is extinguished it cannot be lighted up
again either accidentally or intentionally. In this modification the contact
piece is broken in the middle consisting thus of two parts and c. The
contact is now made or broken by the upper part of the slide t. All other parts
of the device are similar to those above described, the slide f being so shortened 4
that it no more projects out of the lamp and hence can no further be actuated
independently. When in consequence of pressure being exerted on the glass,
the lever e is raised, the spring shoots the slide f outwardly and the re-
establishment of the contact between the lever e and the contact pieces and c³
becomes a matter of impossibility, unless the whole apparatus being smashed up 4
and the slide f thus becomes depressed..
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents, 62, Saint Vincent Street, Glasgow,
Agents for the Applicant.

page_text: Protective Device for Incandescent Electric Lamps.
I, RICHARD KÄS, of Aspangstreet 13, Vienna, in the Empire of Austria, Works
Foreman, do hereby declare the nature of this 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 consists essentially in throwing out of circuit an
incandescent lamp before the bulb or envelope of the same is broken by a shock
or blow, so as to prevent the ignition of explosive gases or other substances in
consequence of the burning up of the carbon filament of the broken incandescent
lamp. The device invented by me is more particularly adaptable to miners'
electric lamps.
Referring to the drawings filed with the Provisional Specification,
Fig. 1 is a view of the lamp complete, Fig. 2 shows the device after the removal
of the incandescent lamp, of the glass shade and of the reflector; Fig. 3 is a
vertical central section of the whole lamp; Fig. 4 is a plan of the ring i,
Fig. 5 is a cross section of this ring i, Fig. 6 shows the normal position of the
contact maker (lamp extinguished), Fig. 7 shows the position of the contact maker
when the same is closed (lamp burning). Fig. 8 is a view corresponding to Fig. 2
of a modified form of the protective device.
Upon a wall a is fixed the ring b. Within this ring is arranged
the contact piece (Fig. 2) the latter being screwed home and carry-
ing the wire c the end of which has the form of a hook. On the opposite
side is placed the contact piece d which carries at the top another wire whose
free end is bent over to form a hook. The two hooks c¹ and serve to suspend
the incandescent lamp and to convey the current thereto. The plate & carries
a contact maker and breaker lever or key e fulcrumed on 0, (Figs. 2 and 6)
and provided at the top with a rounded off pin e¹ (Fig. 3). The sliding contact
(Figs. 1, 2, 3, 6, 7, and 8) is guided in a slot of the ring b and is prevented
from slipping down by the army of the two armed spring g, g, bearing upon
the pin f; its inward motion being limited by the più f striking the lever or
key e. The other arm of this spring g, g', bears upon the lever or key e
and tends constantly to bring the same into contact with the contact piece c
which can only be prevented by the springing there between of the sliding
contact which pulls the spring inwardly. The double spring 9, g', is
fixed by a screw to the piece 3 which is likewise screwed on the wall or plate a;
as are the parts b¹, c, d, and e³, (Fig. 2). The reflector n (Fig. 1) is screwed on
to the parts b¹ and b³.
Upon the outer periphery of the ring bare screwed the four springs h (Fig. 2)
which are carried by the small screws h. The latter springs have for their
object to hold the ring i, to which the annular box r (Figs. 1 and 3) is fixed by
means of screws m² passing likewise through the pieces m on the one hand and
through the holes m formed in the bar k Fig. 4, fixed rigidly to the said ring on
the other hand, while the screws m³ pass likewise through the angles of the
springs h (Fig. 1) bent at their extremities in the form of a hook, in such a position
that the said ring i with its annular box is held above the plate a and is
held fixed at the same time by the angles of the springs h and the screws m²
passing through them to such an extent that it can only be moved by exerting
a certain amount of pressure either from the side or upon the whole screwed hemi-
spherical glass or cover so as to move the rod k firmly fixed to the ring i and
provided centrally and downwardly with a small semi-circular cavity 1 (Fig. 5)
and press the same upon the pin e¹ of the contact maker or breaker and thus

page_text: raise the lever or key e whereupon the contact is broken and the lamp is
extinguished.
Upon the ring b is screwed another ring (Fig. 3). The rod k of the ring i
rests in the recesses 2 of the ring b. Upon the ring i is screwed the ring S
wherein is fitted the hemi-spherical glass above referred to.
The fitting up is
carried out in such a manner, that the ring i is first placed upon the ring b and
is screwed up with the annular box by means of the small screws m², then the
ring v is screwed upon b, after which the reflector is screwed in position, while
the incandescent lamp is suspended to the wires c¹, 2, and is held besides at
its pointed end by the spring p fixed to the reflector n. Over the whole apparatus,
the ring s with the hemi-spherical glass or cover placed therein is finally screwed
upon the ring i.
This lamp operates in the following manner: To allow the electric current
proceeding from the source of electricity placed at the back of the plate a (Fig. 3)
to enter the lamp, the sliding contact is drawn down. As shown in Fig. 7 the
lower part of the contact lever e comes to bear, under the action of the spring g',
upon the contact piece c³, so that the electric current introduced through the
latter passes along the wire c¹, enters the lamp and follows the wire e as far
as the contact piece c, the circuit being thus closed and the lamp burning. If
now the glass of the ring i or the ring itself was to receive a knock or a blow
this ring would be sunk, the rod would depress the pin e¹, the lower part of the
contact making or breaking key or lever e would be raised, the slide f urged on
by the pressure of the spring g would spring forward, so that this lever or key
would come to bear on the slide as at f, Fig. 6, and would break contact with
the contact piece The current would then be broken and the lamp
extinguished.
Fig. 8 shows a modification whereby when the glass is broken, ignition cannot
be communicated to the surrounding atmosphere without thoroughly smashing
the lamp, that is to say that when the lamp is extinguished it cannot be lighted up
again either accidentally or intentionally. In this modification the contact
piece is broken in the middle consisting thus of two parts and c. The
contact is now made or broken by the upper part of the slide t. All other parts
of the device are similar to those above described, the slide f being so shortened
that it no more projects out of the lamp and hence can no further be actuated
independently. When in consequence of pressure being exerted on the glass,
the lever e is raised, the spring g shoots the slide upwards and the re-
establishment of the contact between the lever e and the contact pieces c¹ and c³
becomes a matter of impossibility, unless the whole apparatus being smashed up
the slide thus becomes depressed.
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:
A protective device for preventing ignition being communicated through the
burning up of electric incandescent lamps due to the breakage of the glass
characterized by:
1. The arrangement of a movable contact making and breaking key or lever e
between the contact pieces c, e³, conveying the electric current from the source
of electricity, which key or lever is put off contact from the contact piece in
consequence of the pressure of the transverse rod of a ring i placed over the
same and in which the outer glass is fitted, so that a blow or knock struck on
the said glass or ring extinguishes the lamp before the breaking of the glass had
had time to act.
2. The arrangement of the mechanism inside a ring b fixed to the plate through
which the electric current passes and carrying in suitable notches 62 the rod k
and with it, the ring firmly fixed to the rod k as well as the annular box like
frame r screwed to the ring i by the screws m³ passing through the angles formed

page_text: at the hook like extremities of the springs h for the purpose of holding the ring i
upon the springs, which only act in consequence of a special pressure or blow.
3. The arrangement of mechanism consisting of the contact piece ³ conveying
the electric current from one pole to the wire and to the contact e through
which this current returns, of a movable key or levere being in contact with the
piece on the one hand and with the piece d on the other hand with piece carries
the wire, while the wires c¹ and carry the incandescent lamp and the sliding
contact f makes and breaks contact between the contact piece and the lever e.
4. The arrangement wherein the contact piece is divided into two parts c³
and which parts are connected or disconnected by the up or down motion of a
slide t in order to light up or extinguish the lamp, the slide f being so shortened as
to cease to project out of the lamp and hence being unable to return to its position
of rest unless the lamp is broken to pieces, when in consequence of the raising of
the lever e the spring has shot the slide f upwards.
Dated this 7th day of April 1899
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents, 62, Saint Vincent Street, Glasgow,
Agents for the Applicant.