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To all whom it may concern: Be
it known that we, ROBERT A. MANWARING
and JAMES T. HESSEL,
citizens of the United States, residing at New Haven, in the county of
New Haven and State of Connecticut,
have invented a new and useful improvement in Insulators; and we do
hereby declare the following, when taken in connection with the
accompanying drawings and the characters of reference marked thereon, to
be a full, clear, and exact description of the same, and which said
drawings constitute part of this application, and represent, in-- Figure
1 a side view of a suspension lamp with a conductor connected with an
insulator constructed in accordance with our invention. Fig. 2 a side
view of one of our insulators detached. Fig. 3 an underside view of the same. Fig. 4 a view in vertical section of one of the insulators
indicating how it is supported and how the twin conductor is attached to
it. This
invention relates to an improvement in insulators particularly those
attached to a pin and adapted for twin conductions for arc lamps, but
applicable for various other places where a conductor is arranged
vertically. When a conductor extends in a vertical direction, as for
instance, on a pole for an arc lamp, it is desirable that the conductor
should be held away from possible contact with the pole or other
structure from which the lamp is suspended. The
object of this invention is to provide an insulator which may be
supported on a bracket with clearance grooves for the conductor and the
invention consists in the construction hereinafter described and
particularly recited in the claims. In carrying out our invention, we form the insulator 2 from porcelain, glass or other insulating material. This insulator has substantially straight sides and the usual threaded central recess 3 whereby it may be attached to the upper end 4 of any suitable bracket or pin 5 and in its lower end it is provided with the usual inner petticoat 6 and outer petticoat 7. At one or more points, and preferably four, the insulator is formed with vertical grooves or channels 8 extending throughout its length, and around the insulator and intersecting these grooves is an annular groove 9, and preferably and for the purpose of lightening the insulator the space between the vertical grooves 8 will be cut away |
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as
at 10, although this is not essential. Our improved insulators are
applied in the usual way and as shown in Fig. 1 of the drawings two of
them are fixed to a post 11 supporting an arc lamp 12. The twin conductor 13 extends downward substantially parallel
with the post and is connected with our insulators 2. The conductors
pass through any one of the several vertical grooves 8 as is most
convenient, and a plurality of grooves is provided so that when the
insulator is screwed onto the supporting bracket one groove will stand
in proper position to receive the conductor. These
conductors are secured to the insulators by ties 14 which are seated in
the annular grooves 9. We thus provide an insulator adapted to have vertically
arranged conductors secured to them without bending the conductors and
enabling the conductors to be firmly connected with the insulators, and
an insulator which is provided with the same insulating properties as
insulators adapted to be used for horizontal leads. We
claim:-- 1.
A single piece insulator having substantially straight sides, a central
pin recess entering the lower end, and formed in its outer surface with
a conductor groove extending throughout its length in a plane
substantially parallel with the axis of the central recess. 2.
A single piece insulator having substantially straight sides, a central
pin recess entering the lower end, and formed in its outer surface with
a plurality of conductor grooves extending throughout its length in a
plane substantially parallel with the axis of the central recess. 3. A single piece insulator having substantially straight sides, a
central pin recess entering the lower end and formed in its outer
surface with a plurality of vertically arranged conductor grooves
extending throughout its length in a plane substantially parallel with
the axis of the central recess, and with an annular groove arranged at
right angles to the conductor grooves and intersecting the same. In testimony whereof, we have signed this specification
in the presence of two subscribing witnesses.
ROBERT A. MANWARING.
JAMES T. HESSEL. Witnesses: ROBERT.
B. BUTLER, I. V. LARKIN. |