Improvements in Regulating Mechanism of Electric Arc Lamps.
Year: 1886

page_text: Date of Application, 30th June, 1886.
Complete Left, 30th Mar., 1887.
Complete Accepted, 10th May, 1887.
PROVISIONAL SPECIFICATION.
Improvements in Regulating Mechanism of Electric Arc Lamps.
We, FREDERICK CARRINGTON PHILLIPS, of No. 2, Victoria Mansions, Westminster,
in the County of Middlesex, Electrical Engineer, and HUGH ERAT HARRISON, of the
same place, Electrical Engineer, do hereby declare the nature of this invention to be
as follows:
This invention relates to electric are lamps.of the kind in which for regulating the
position and movement of the carbon there is used in connection with the carbon
holder proper a tube hereinafter called for distinction the hollow carbon holder with
a rod that operates expanding apparatus hereinafter called a clutch carried by a tube
or by a second rod and which expands and takes a hold of the hollow carbon holder
when there is longitudinal movement of the first named rod in relation to the tube or
second rod.
According to this invention a ring hereinafter called the ring lever and two pieces
are used one inside the ring lever and the other outside thereof together with a step
or projection whereby the ring lever may be moved and tilted in a plane containing
the said two pieces. These two pieces constitute parts of a plunger arrangement,
and when the ring lever is actuated by the step as above mentioned it operates to
press the two pieces apart so as to cause them to bear against and take a hold of the
hollow carbon holder. An arrangement of this kind (when the hollow carbon
holder used is a tube of circular cross section which may be connected in any
convenient manner to the carbon holder proper) comprises a cylinder reduced in
diameter in its central part so that when the ring lever is placed on to and over this
reduced part the cylinder and ring lever move freely inside the hollow carbon holder.
The largest diameter of the ring lever must be somewhat less than the internal

page_text: diameter of the hollow carbon holder. A piece is provided which shall when in place
fit between the inside of the hollow carbon holder and the outside of the ring lever.
The ring lever is a short hollow cylinder; thus if the side of the ring lever opposite
to the piece be moved or tilted so that the axis of the ring lever is no longer co-
incident or parallel with that of the cylinder, the one piece will be pushed against
one side of the hollow carbon holder, and the cylinder which constitutes the second
piece against the other side, and if the step be further moved the clutch and hollow
carbon holder will move with it.

page_text: COMPLETE SPECIFICATION.
Improvements in Regulating Mechanism of Electric Arc Lamps.
We FREDERICK CARRINGTON PHILLIPS, of 2 Victoria Mansions Westminster in
the County of Middlesex Electrical Engineer and HUGH ERAT HARRISON of same
address, Electrical Engineer, 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 :-
This invention relates to electric are lamps of the kind in which for regulating the
position and movement of the carbon, there is used in connection with the carbon
holder proper a tube hereinafter called for distinction the hollow carbon holder with
a rod that operates expanding apparatus hereinafter called a clutch, carried by a tube
or by a second rod and which expands and takes a hold of the hollow carbon holder
when there is longitudinal movement of the first named rod in relation to the tube or
second rod.
According to this invention a ring hereinafter called, the ring lever, and two pieces
are used one inside the ring lever and the other outside thereof, together with a
step, or projection whereby the ring lever may be moved and tilted in a plane
containing the said two pieces. These two pieces constitute parts of a plunger
arrangement, and when the ring lever is actuated by the step as above mentioned it
operates to press the two pieces apart so as to cause them to bear against and take a
hold of the hollow carbon holder.
Fig. 1 of the drawings shows the hollow carbon holder-with an electrode attached,-
broken away in order to show the clutch and its attachments.
Fig. 2 shows the hollow carbon holder broken away as in Fig. 1 and the clutch in
longitudinal section on line C, D of Fig. 3.
Fig. 3 shows a transverse section of Figs. 1 and 2 on line A B.
The hollow carbon holder E is shown in the form of a tube of circular cross
section which is provided at one end with a clamp or holder M for holding the carbon
or other electrode N at its other end there passes into this tube a second smaller tube
or rod F through the cap O on the lower or inside end of this smaller tube or rod
there is rigidly fastened a plunger like piece J which is of slightly smaller diameter
than the inside diameter of the hollow carbon holder E, this piece J is reduced in
diameter at its central part as shown at J, so that the ring lever R may fit loosely on
this reduced part as shown, the external diameter of the ring lever R is less than the
inside diameter of the hollow carbon holder E so as to admit the movable piece I
between its self and the side of the hollow carbon holder immediately adjacent.
The piece J is slotted longitudinally to admit the piece I and the piece I is made
wider at its ends in notch form as shown in Fig. 2 by this means the piece I is secured
in its place but is free to move against the inside of the hollow carbon holder.
The piece J is made in two parts as shown in Figs. 2 and 3 so that the ring lever R
may be easily put on or off the reduced part J. The step or piece H has screwed into
it the rod G which passes up through the tube F the tube F and the piece J are

page_text: slotted to admit the piece H. The piece H is notched as shown so as to admit that
side of the ring lever R which is opposite to the side next to the piece I the tube or
rod F is provided at its upper or outer end with a lip L which rests against the
stop K when in position of rest. It will now be evident that when the rod G is
pulled up the step H will lift one side of the ring lever R this will cause its opposite
lower inside edge to press against the piece J in its reduced part J, at P and its
opposite outside top edge to press against the piece I thus causing the two pieces I
and J to be forced apart in a direction transverse to the length of the hollow carbon
holder and thereby to grip it and if the rod G be further lifted the clutch together with
the hollow carbon holder will be lifted and the electrode N will be separated from the
lower electrode upon which it rested. When the rod G is moved in the opposite
direction, that is, lowered the lip L will come against the stop K and any further
movement of G downwards will cause the pieces I and J to relax their grip against
the hollow carbon holder and so permit it. to slide downwards until checked by an
upward movement of G and piece H. The above arrangement is that which we
prefer for use in lamps having two or more pairs of electrodes that are actuated and
controlled by one electromagnetic arrangement, in lamps having only one pair of
electrodes we prefer to arrange the actuating and controlling electromagnet so that it
surrounds the hollow carbon holder, in this arrangement the rod G is made of iron so
as to constitute the core of the electromagnet and is directly acted upon thereby, in
this arrangement it is preferable to make G of tubular form so that it goes freely
into the hollow carbon holder and encircles the tube or rod F instead of passing up
inside this as is shown in the drawing-the parts J I H and R and their arrangement
remaining substantially the same. The separate piece I may be dispensed with and in
its place the Ring lever R may be provided with a projection that shall press directly
against the hollow carbon holder, or the ring lever R may act direct and not through
the piece I or a projection on R. The piece J may be of other forms than cylindrical.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :-
1.-The lever in the form of a ring operating inside a hollow carbon holder
substantially as described.
2. The ring lever R in combination with the pieces J I the step H the tube or
rod F and the tube or rod G inside a hollow carbon holder substantially as shown and
described.
3. The two pieces I and J operating inside and against a hollow carbon holder in
manner substantially as described.
11
THE 1
1005