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To all whom it may concern: Be
it known that I, HENRY F. KRETZER,
a citizen of the United States, residing at St. Louis, State of
Missouri, have invented certain new and useful Improvements in
Insulators, of which the following is a full, clear, and exact
description, reference being had to the accompanying drawings, forming a
part hereof. My
invention has relation to improvements in lightning-rod insulators; and
it consists in the novel construction of insulator more fully set forth
in the specification and pointed out in the claims. In
the drawings, Figure 1 is an elevation of a section of a dwelling,
showing my invention applied thereto.
Fig. 2 is an elevation of the insulator.
Fig. 3 is an elevation at right angles to Fig. 2.
Fig. 4 is a perspective view of the insulator, showing the
lightning-rod coupled thereto. Fig.
5 is a top plan of the insulator. Fig.
6 is a middle vertical section on line 6 6 of Fig. 3.
Fig. 7 is an elevation of a modified form of the device, and Fig.
8 is a top plan thereof. The
object of my invention is to construct an insulator which will dispense
with the usual basal ring by which the same is generally secured in
place, one which may dispense with the presence of the usual
perforations intended for the insertion of the wire by which the rod is
fastened to the insulator, and one which in other respects presents a
simpler and more desirable form better apparent from a detailed
description of the invention, which is as follows Referring
to the drawings, l represents the body of the insulator, being
preferably cylindrical in form as shown.
Adjacent to the base thereof is an annular peripheral groove 2,
having parallel communicating passages 3 3, disposed at points
diametrically opposite one another and opening at the opposite end or
top of the insulator. Formed in the upper end or face of the body portion between the passages 3 and disposed at right angles to a line connecting said passages is a groove or depression 4 for the reception of the lightning-rod 5, the latter being subsequently fastened to the insulator by the twisted ends of the wires 6 6, whose medial portions are formed into a loop 7, passed over
the insulator and made to snugly hug the base of the annular groove 2,
the twisted strands of the wires being folded into the passages 3 3 and
their ends finally twisted about the rods, as best seen in Fig. 4. The body portion 1 is secured in position by a screw 8,
inserted previously from the top into a central socket 9, communicating
with the depression 4, the base of the socket communicating with a
central axial passage 10, through which the screw is inserted. I may provide the present insulator with aiming perforations 11 11, located in the path of the passages 3, through which the securing-wire may be threaded and then folded and twisted over the rod 5, if desirable, though in practice I may dispense with the perforations 11 altogether and secure the rod in the manner indicated in Fig. 4. Where
the lightning-rod is of small cross-sectional area and does not
completely fill the depression 4, then in order that the twisted ends of
the securing-wires 6 6 may better bind such smaller rod I provide the
upper end of the body portion with supplemental grooves 12 12,
communicating with the passages 33, as seen in the modifications in |
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Figs. 7 and 8. It is obvious from these that the wire ends will thus bind a smaller rod to better advantage. In other respects the forms shown in Figs. 7 and 8 are the same as in the other figures, and while I have shown the perforations 11 11 omitted therefrom they could also be present in said modified forms. In
the present invention the securing-screw is completely covered and
protected, and little or no moisture can find access thereto to rust the
same, and since, moreover, the perforations 11 can be omitted altogether
it follows that the securing-wire may be carried on the outside of the
body portion, which latter can thus be made of maximum strength and
durability. I
may of course alter the present construction in minor details without in
any wise departing from the spirit or nature of my invention. Neither
do I wish to be understood as limiting its application to
lightning-rods. Having
described my invention, what I claim is-- 1.
An insulator comprising a body portion, a circumscribing groove located
adjacent to 2.
An insulator comprising a body portion, an annular groove disposed
adjacent to the base thereof, communicating passages leading from said
groove at points diametrically opposite one another and opening at the
face or top of the body portion, a depression formed in the face and
disposed at right angles to a line connecting the passages aforesaid, a
socket leading from the central of said depression, and a passage of
perforation leading from the base of the socket for the reception of a
securing screw substantially as set forth. 3.
An insulator comprising a cylindrical body portion, an annular
peripheral groove disposed adjacent to the base thereof communicating
passages leading from the groove, supplemental grooves formed in the
face of the body portion leading from the passages aforesaid, a
depression formed in the face and disposed at right angles to the
supplemental grooves, a socket leading from the center of the
depression, and a perforated passage leading from the socket for the
reception of a securing-screw, substantially as set forth. 4.
An insulator comprising a cylindrical body portion, an annular
peripheral groove disposed adjacent to the base thereof, parallel
diametrically separated passages leading from the groove and terminating
at the face of the body portion, a depression disposed in the face of
the body portion at right angles to the diametric line connecting said
passages, and aligning perforations opening through the parallel
passages, substantially as set forth.
In testimony whereof I affix my signature in presence of two
witnesses.
HENRY F. KRETZER. Witnesses: EMIL
STAREK, G.
L. BELFRY.
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