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Jan. 14, 1947.
G, G, TRUAX '
" 2,414,180
SAFETY GROUND CLAMP
Filed June 26, 1945
?ver/fol
?ow e
Dada;
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Patented Jan. 14, 1947
‘UNITED . STATES PATENT‘ OFFICE ‘
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2,414,180
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SAFETY‘ GROUND CLAMP
George G. Truax, Renton, Pa.‘ 3
.Applicationlu'ne V26, 1945, Serial No. 601,593
4 Claims.
(Cl. 173-4273) -
tive is moving away from the point of secure-
ment but to
ecome automatically disengaged
on its return trip.
Referring to the drawing, I designates the cable
from the rail as the locomotive approaches said 10 which is wound on a reel carried on the upper
point on its return path of travel,
portion of the locomotive and is maintained in
easy to apply to a rail, and. automatic in its dis- 15 clamp member 5. _Rai1 clamp member 5 com
reaches a point adgacent the connector on lts re_
extending arm portion 1 to the end of which wire
turn tr1p toward Sald connector
4 is connected Rail-engaging portion 6 com
Further objects and advantages of the invenprises a generally channel-Shaped body adapted
tion will appear from the fg?owjng description 20 t0 ?t over the rail head, the side Walls of said body
and claims, and from the accompanying drawing,
being inwardly Converged from the front and
wherein:
rear ends of the body to define a central con
Figure 1 is a perspective View showing the raj]
connector device applied to the rail of a mine
stricted region adapted to closely ?t and friction
ally engage the rail head when cable I is in ten
railway in operating position,
25 sion. At diagonally opposite corners of portion
Figure 2 is a view in side elevation of the con.
6 the side walls are formed with triangular lug
nector device employed in Figure 1,
elements 8, 8 adapted to underlie the rail head
Figure 3 is a bottom view of the connector de_
when the connector has been rotated into grip
vice of Figure .
ping position, said lug elements de?ning a pas~
Figure 4 is a cross-sectional view taken on line 30 Sageway for receiving the rail head in the Process
4~4 ofFigure 2.
Ordinarily the main passages in a mine are
of mounting the connector thereon. To facili- '
tate the automatic disengagement of the con
ried on a reel under tension mounted on the up_ 40 of the inner side Wall surfaces of the channel
hand when the locomotive returns to the junction
point. Quite frequently, the locomotive. operator,
when returning to the junction point with aload-
neI-shaped body to allow the connector to be
thus rotated out of engagement with the rail head
»
ed train, is unable to stop and frequently runs
aver the cable, causing short circuits and other 55
by the upward component of force exerted by
the cable on‘ the approaching locomotive.
While a speci?c embodiment of a connector
2,414,180
4
3. A rail connector device for a mine locomo
device for an electric mine locomotive has been
disclosed in the foregoing description, it will be
understood that various modi?cations within the
spirit of the invention may occur to those skilled
in the art. Therefore, it is intended that-no limi
tations be placed on the invention other than
as de?ned by the scope of the appended claims.
What is claimed is:
.1. A rail clamp device comprising a generally
tive comprising a generally channel-shaped body
member adapted to engage a rail head and an
arm extending laterally from said body member, .
the inner side wall surfaces of said body mem
ber converging from the front and rear ends of
said member to de?ne a reduced intermediate
section adapted to frictionally grip a rail head,
diagonally opposite end portions of said inner
wall surfaces‘ being downwardly and outwardly
channel-shaped body member adapted to engage 10 inclined, and the other diagonally opposite end
portions of said inner wall surfaces being formed
a rail head and an arm‘ extending laterally from
said body member, the inner side wall surfaces
of said body member converging to de?ne a re
with inwardly projecting lug elements adapted
duced intermediate section for said body member,
diagonally opposite end portions of said inner wall
surfaces being downwardly and outwardly in
‘4. The structure of elaim 3, and wherein said
lug members de?ne a rail head-receiving space
with respect to said inclined wall surfaces, the
to underlie the rail head.
7
space provided being such that the connector de
g
clined.
.
vice may be rotated off the rail head by a light
inwardly extending lug member is provided on the 20 upward force applied to the arm.
side wall opposite each of the downwardly and
GEORGE’ G. TRUAYII‘C. I
outwardly inclined surfaces, said lug members de
?ning a rail head-receiving space with respect to
said inclined surfaces.
2. The structure of claim 1, and wherein an
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