Improvements in Electric Couplings.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Electric Couplings.
.
I, WILLIAM JAMES DAVY, Engineer, of Horsell Road Works, Ronald's Road,
Highbury, in the County of London, do hereby declare the nature of this inven-
tion to be as follows:-
This invention for improvements in electric couplings has for its object to
facilitate the coupling and uncoupling of arc lamps that have to be raised and
lowered to the main leads or conductors and is applicable to either alternating
or continuous lamps; and relates to that class of coupling in which contact
rings mounted on the lamp casing or head are pulled up against corresponding
stationary contact rings fixed on the overhanging end of the supporting post
or arm.
Now according to this invention one set of contact rings is mounted on an in-
sulating base that is forced outwards against stops in a head by a helical spring.
Preferably the contact rings are mounted on the conical or similar surfaces so
that they are guided into proper position when the movable rings are drawn up
against the stationary rings, and free themselves from any particles of dust or
the like. The helical spring ensures a good and perfect contact between the
rings.
Dated this 5th dow of Tule. 1900
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
Improvements in Electric Couplings.
I, WILLIAM JAMES DAVY, Engineer, of Horsell Road Works, Ronald's Road,
Highbury, in the County of London, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement;-
-
This invention for improvements in electric couplings has for its object to
facilitate the coupling and uncoupling of are lamps that have to be raised and
lowered to the main leads or conductors and is applicable to either alternating
or continuous lamps; and relates to that class of coupling in which contact
rings mounted on the lamp casing or head are pulled up against corresponding
stationary contact rings fixed on the overhanging end of the supporting post
or arm.
Now according to this invention one set of contact rings is mounted on an in-
[Price 8

page_text: sulating base that is forced outwards against stops in a head by a helical spring.
Preferably the contact rings are mounted on the conical or similar surfaces so
that they are guided into proper position when the movable rings are drawn up
against the stationary rings, and free themselves from any particles of dust or
the like. The helical spring ensures a good and perfect contact between the
rings.
In the accompanying sheet of drawings Fig. 1 represents a vertical section
of an electric coupling constructed according to this invention the electric
circuit being closed, and Fig. 2 is a similar view showing the relative positions
of the parts when the electric circuit is open.
Conical contact rings a are mounted on an insulating base b, seated on a dished
guide disc which is forced outwards against a stop ring e in the head or hood d
by a helical spring e. The ends of the leads f are secured in sockets g connected
to the contact rings a by screws has shown. Movable conical contact rings a¹
corresponding to the rings a are mounted on an insulating base 61 seated on the
cap i and are connected, by fixing screws 7 to the lamp terminals m so that when
one set of contact rings a are brought into contact with the other set. a¹ the
leads or conductors are electrically connected with the lamp terminals m.
The hauling rope n is secured in the cap i and passes through the head or hood d
as shown.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:
1. An electric coupling comprising two sets of insulated contact rings capable of
being forced into contact with each other, one set being connected to the leads
or conductors and forced outwardly to a limited extent by a spring whilst the
other set is connected to the lamp terminals, both sets being adapted to be forced
into contact by suspending or hauling rope, substantially as described and
shown.
2. In an electric coupling stationary conical contact rings mounted on an
insulating base seated on a dished guide disc working in a head or hood and being
forced outwards against a stop ring by a helical spring, substantially as
described.
3. An electric coupling arranged and constructed substantially as described
and shown.
Dated this 5th day of April 1899.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, Agents.