UNITED STATES PATENT OFFICE
ANTHONY KRIBS, OF BROOKLYN, NEW YORK, ASSIGNOR TO R.V. LAMBERSON, OF ITHICA, NEW YORK.
MOLD FOR FORMING INSULATORS.
No. 801,461 Specification of Letters Patent. Patented Oct. 10, 1905.
Application filed February 20, 1905. Serial No. 246,569.
To all whom it may concern:
it known that I, ANTHONY KRIBS,
of Brooklyn, in the county of Kings, in the State of New York, have
invented new and useful improvements in molds for Forming Insulators, of
which the following, taken in connection with the accompanying drawings,
is a full, clear, and exact description.
invention relates to improvements in molds for forming insulators, but
is specially adapted for forming a particular style of insulator having
open-sided recesses in opposite sides for receiving an electric
conductor, such as a wire, which is retained in the recesses against
accidental displacement by ears or tongues which partially cover the
open sides of the recess, the adjacent faces of the tongues or ears
being disposed in parallel inclined planes.
object is to provide a simple sectional mold in which the sections are
separable, but when brought together in operative position constitute a
chamber having substantially the same form as the exterior contour of
the desired form of insulator.
of the features of this invention is to enable the sections of the mold
to be separated without breaking or marring the con- tour of the molded
insulator, which is of course green and more or less soft while the
sections of the mold are being separated.
objects and uses relating to the specific structure of the mold will be
brought out in the following description.
the drawings, Figure 1 is a top plan, partly in section, of my improved
mold shown in its closed position for receiving the material, as glass,
koalin or other earthy sub- stance, which may be adapted for insulators
of this character. Fig. 12 is a top plan of the parts seen in Fig. 1,
showing the movable sections as opened to permit the withdrawal of the
molded insulator, the handles of the movable section being broken away.
Fig. 3 is a longitudinal vertical sectional view taken on line 3 3, Fig.
1. Fig. 4 is
an inner end face view of one of the mold - sections for forming the
diagonal groove and outer faces of the tongues or ears at one side of
the insulator. Fig. 5 is a perspective view of the particular form of
insulator made by the mold seen in Figs. 1 to 3, Inclusive.
carrying out the objects stated I provide a somewhat heavy metal
base-section 1 with a recess or socket 2 opening from its top face and
of such contour as to form the greater portion of the top of the
insulator seen in Fig. 5. This base section 1 is preferably made of
cast-iron or other suitable material, having its upper face
substantially flat and disposed in a substantially horizontal plane for
receiving and supporting two similar but opposite movable mold-sections
3 and 4, which are hinged to each other and to a bracket 5 upon the rear
side of the base-section 1 by a pivotal pin 6.
socket or recess 2 is disposed substantially central in the base 1, and
the pivotal pin 6 is disposed some distance at the rear of the socket 2,
while the movable sections 3 and 4 which are hinged upon the pivotal pin
6, extend forwardly
at opposite sides and some distance in front of the socket 2 and are
provided with suitable handles 7, by which the sections may be opened
and closed, said handles being normally held in their closed position by
a suitable locking-link 8.
lower faces of the sections 3 and 4 are disposed in a flat horizontal
plane substantially coincident with and riding upon the top face of the
base-section 1, and the central portions of these sections 3 and 4 are
of sufficient height to form the sides of the portion of the insulator
above the upper end of the socket 2. The adjacent meeting faces of the
sections 3 and 4 are formed with similar but opposed recesses 9 of such
dimensions and con- tour as to form the greater portions of the
insulator above the portion of such insulator which is formed in the
socket 2, and there- fore each of the recesses 9 is substantially
semicircular in form-- that is, each recess 9 is made to embrace and
form substantially half of the upper portion of the insulator above the
socket 2. The upright faces directly in front and at the rear of the
socket 2 meet when closed in a substantially vertical plane running
through the axis of the insulator and are each formed with a pair of
projecting tongues or lugs 10, which meet in such vertical plane to form
open-ended slots 11 in the insulator, as 12.
insulator which I desire to form, as best seen in Fig. 5, is cylindrical
in general form, but is provided with a rounding or substantial
hemispherical top 13, a reduced central portion 14, and opposite pairs
of bosses or raised portions 15, those of each pair being arranged above
and beneath the reduced portion 14 and are formed with lugs 16, which
project toward each other and partially bridge across the reduced
lugs 16, although tied to the main body and forming a part thereof above
and beneath the recess of the reduced portion 14, are separated from the
main body a sufficient distance to form the transverse slots 11, which
are of sufficient size both transversely and vertically to receive any
ordinary electric conductor, (not shown,) and the adjacent faces of each
pair of lugs 16 are disposed in inclined planes substantially parallel
with each other and separated a sufficient distance to permit the
insertion of a wire there through-- such, for instance, as the electric
opposite ends of these inclined faces, as 17, are disposed in different
horizontal planes-- that is, one end of the inclined slot, as 18,
between the inclined faces 17 is disposed in a different plane from the
other end-- the object of which is to prevent accidental displacement or
removal of the electric conductor from the slot 11 when once inserted
through the slot 18 between the ears 16 and main body of the insulator.
The principal feature of my invention consists in the means for forming
the slot 11 and diagonal slots 18, and for this purpose I provide the
arms or sections 3 and 4 with independently movable mold-sections 20,
which are pivoted to their respective arms 3 and 4 by pivotal pins 21,
which are located, respectively, at the rear and in front of the socket
greater portions of the side enlargements or bosses 15 of the insulator
are formed by recesses 22 in the molds 3 and 4; but the free extremities
or projections 16, as well as the slot 18, are formed by the
mold-section 20, each of which is provided with a substantially central
tongue 23 and lower and upper upright faces 24.
Each tongue 23 is disposed in an inclined plane at an angle with
the top face of the base-section 1 to form the diagonal groove 18, while
the upright faces 24 form the outer upright faces of the projection 16.
When the sections 3 and 4 are brought together to the position seen in Fig. 1, the mold- sections 20 slide upon the top face of the base-section 1, as best seen in Fig. 3, and enter recesses 25 in the adjacent faces of the sections 3 and 4, and the inner faces of the tongues 23 abut against the outer faces of the lugs 10,
form the circuit eventual slots 11.
several movable mold-sections 3, 4, and 20 are arranged and constructed
so that when they are brought to their closed position they form a
chamber of substantially the same contour as the upper portion of the
insulator above the socket 2, as best seen in Fig. 3. The slots 18 and
tongues 23 at opposites sides of the insulator preferably incline in
opposite directions, and the mold-sections 20 are pivotally connectedly
the swinging mold-sections
3 and 4 in such manner that when the sections 3 and 4 are opened the
sections 20 will draw away from the insulator in nearly opposite radial
directions, as best seen in Fig. 2, so as to avoid mutilation of the
insulator, which is comparatively soft when the movable mold- sections
are opened. The hinging of the mold- sections 20 to the swinging
sections 3 and 4, together with the fact that the mold-sections 20 rest
upon the top face of the base-section 1, is an important feature of my
invention, for the reason that all the movable sections may be withdrawn
from the molded insulator by a single operation, the drag of the
sections 20 upon the top face of the base-section 1 facilitating the
removal of such sections freely and without liability of mutilating the
the sections 3 and 4 are brought together in the manner shown in Fig. 1,
they are held in this position by a suitable clamp 28, which is hinged
at 29 to the front face of the base-section 1, so as to swing in a
vertical plane into and out of engagement with opposite faces of the
sections 3 and 4, it being understood that when in this position the
recesses in the sections 3 and 4 are centered around the axis of the
socket 2, so as to form a continuation of the insulator-mold, the up-
per portion of which is open at the top to permit the insertion of the
semiliquid or plastic material which is to form the insulator.
Fig. 3 I have shown the insulator 12 in section and as provided with a
central threaded socket 30 and an annular base-flange 31; but it is to
be understood that this threaded socket is formed by a separate
mechanism which is not shown in this application, because it forms no
part of my present invention.
operating my improved mold the sections 3 and 4 are brought together by
hand to the position seen in Fig. 1, during which operation the
mold-sections 20, which are more or less inert and frictionally engaged
with the top face of the base-section 1, are caused to swing upon their
pivot 21 and to enter their respective recesses 25 in the sections 3 and
4, after which the clamping element 28 is rocked upwardly to engage the
opposite outer faces of the sections 3 and 4, as best seen in figs. 1
and 3, and, if desired, the handles 7 may be further locked together by
means of the link 8.
While in this position the tongues 10 are brought into engagement
with each other and the tongues 23 are brought into engagement with the
outer upright faces of the tongues 10, while the upright faces 24 of the
mold-sections 20 are registered with the walls of their respective
recesses 22, thus completing a continuous chamber with the socket 2 of
substantially the same contour as the outer surface of the insulator
seen in Fig. 5. After the material in a more or less liquid or plastic
state is filled in the mold through the top opening and given sufficient
time to set or assume a self-retaining condition the clamping members 8
and 28 are thrown out of operative position, and the mold-sections 3 and
4 are then opened to the position seen in Fig. 2, thereby drawing the
mold-sections 20 from opposite sides of the molded insulator until the
tongues 23 are withdrawn from the grooves 18, whereupon the molded
insulator when sufficiently hardened may be lifted or withdrawn from the
socket 2 in the base-section 1.
thus described my invention, what I claim, and desire to secure by
Letters Patent, is--
A mold for forming insulators of the class described consisting of a
base-section having a socket and a substantially flat horizontal top
face, opposite similar mold-sections hinged to swing toward and from
opposite sides of the socket and upon the top face of the base-section,
each of said hinged sections being provided with a pair of tongues
moving together at opposite sides of the socket for forming
circumferential slots in the insulator, and additional mold-sections
hinged to the swinging sections at opposite sides of the socket and
provided with tongues inclined at an angle with the top face of the
base and cutting through the outer walls of said circumferential slots.
A mold for forming an insulator of the class described, consisting of a
base-section having a socket opening from its top face, additional
mold-sections hinged to move upon said top face of the base toward and
from opposite sides of the socket, and provided with recesses for
forming a continuation of the chamber in which the Insulator is to be
formed, I said additional sections being each provided with a pair of
tongues meeting at opposite sides of the socket for forming
circumferential grooves in opposite sides of the insulator, and a pair
of swinging mold-sections, one upon each of said additional sections and
provided with a tongue disposed in an inclined plane at an angle with
the top face of the base-section and operating to cut through the outer
wall of the circumferential slot for the purpose set forth.
A mold for forming the herein-described insulator consisting of a
base-section having a socket for forming the top and portions of the
sides of the insulator, opposite swinging sections having recesses for
forming the sides and each provided with a pair of tongues for forming
the open-ended slots in opposite sides of the Insulator, and additional
sections having inclined projections abutting when closed against the
side faces of the tongues of the swinging sections.
A mold for forming the herein-described insulator, said mold having a
chamber for forming the top and sides of the insulator, tongues on the
opposite sides of the mold to form circumferential slots in the
insulator, and additional tongues extending inwardly from opposite sides
of the mold to the outer faces of the former tongues for forming
openings through the outer wails of the slots of the insulator.
A mold for forming the herein-described insulator, said mold having a
chamber for forming the top and sides of the insulators tongues
projecting circumferentially from opposite walls of the chamber, and
additional tongues projecting radially from said opposite sides of the
chamber in planes intersecting the planes of the first-named tongues.
witness whereof I have hereunto set my hand this 6th day of February
EMILE A. KRIBS.