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Aug. 19,1194?.
Filed Dec. 12, 1942
Patented Àug. 19, i947
Eugene D. Reiber, Manor, Pa., assignor to West~
inghouse Electric Corporation, East Pittsburgh,
Pa., a corporation of Pennsylvania
Application December l2, 1942, Serial No. 468,771
3 Claims. (Cl. 20G-52)
Fig. Ll is a sectional view taken along the line
My invention relates generally to control de»
vices, and it refers- in particular to control sys~
tems and devices for preventing overrun of cable
ïV-IV of Fig. 1; and
reels .used on mining locomotives and the like.
Generally stated, it is an object oi my inven»
tem embodying the principal features of the» in
Referring to Figures l through 4, the- reference
tion to p-revent overrunning of locomotive cable
reels in a manner that is both simple and inex
More speciñcally, it is an object of my inven
tion to provide for controlling the operation of
cable reel locomotives to prevent the cable from
being unwound from the reel beyond a predeter
Fig. 5 illustrates schematically a control sys
numeral lil may denote generally a control switch
arranged to be operated in response to predeter
mined movement of a, cable, such as the power
cable l2 of a locomotive or the like. The control
switch may, for example, comprise a casing hav
ing a base portion I3 and a cover portion lll se
cured thereto by the bolts l5. The base portion
and cover portion may be provided with engag~
ing ilanges I6 and Il, respectively, which may be
suitably machined to provide an explosion~proof
joint therebetween. A guide support I8 may be
to deenergize the locomotive and/or apply the
provided on the base portion for receiving and
locomotive brakes when the cable has been un
guidingy cable l2, and a stud I9 may be associated
wound from the reel as far as is permissible.
Another object of my invention is to provide 20 therewith to provide a swivel connection with
an insulating bushing 2li whereby the switch may
a control switch which may be operated in con
mined point.
It is also an object of my invention to provide
for operating a control switch in response to the
unwinding movement of the-cable from a reel
nection with 9, cable guide on a locomotive to
be mounted on a locomotive frame or the like.
The switch mechanism may be of any suitable
stop the locomotive when the cable becomes un
construction, comprising, for example, a pair of
wound from its reel a predetermined amount.
Yet another object of my invention is to pro 25 contact arms 22 and 23 which may be pivotally
mounted on a panel 24 of insulating material by
vide for operating a locomotive control switch
means of U-shaped brackets 25 and pins 26. The
in response to movement oi a movable portion
panel may be supported on the base I3 by means
of a cable guide,
of bolts El and spacers
rI’erminal members
Other objects will, in part, be obvious and will,
30 29 may be mounted on the panel 24 in spaced
in part, be explained hereinafter.
relation and arranged to be bridged byl means of
In accordance with my invention, a cable guide
a pair _of contact members Eil which may be
on a cable reel locomotive may be provided with
`mounted ori' the contact arms 22 and 23, as is
a removable core through which the cable passes.
best shown in Fig. 3. Rollers 32 may be mounted
The outer surface of the core is provided with a
recess wherein normally rests a plunger which 35 on the upper ends of the contact arms by means
of the pin 33.
is actuable to operate a control switch. An ob
As best shown in Figs. 3 and 4, the base portion
struction is provided on the cable at an appro
(i of the casing may be provided with an in
priate point which engages the core member and
wardly projecting boss 35 having a central bore
actuates the control switch, thereby eiiecting de
energization of the locomotive motor and/or ei 40 56 arranged to receive a substantially cylindrical
plunger 3l. The outer end of the bore may ter
iecting application of the brakes so as to stop
minate in an opening 39 in the guide support I8,
the locomotive and prevent overrunning of the
and may be slightly reduced in size to provide
a peripheral shoulder Gil adjacent the outer end
For a more complete understanding of the na
ofthe bore 36 to prevent the plunger 3l from
ture and scope of my invention, reference may be
projecting therefrom more than a predetermined
had to the following detailed description which
amount. A roller 42 may «be rotatably mounted
may be read in connection with the accompany
on the projecting end portion or” the plunger> to
ing drawing, in which:
project into the guide support opening 39;
Figure 1 is a partially sectioned elevational view
In order to normally bias the plunger 31 toward
oi a control switch embodying the principal fea~ 50
the outer or guide support end of the bore 36, a
tures of the invention;
spring 431 may be positioned within the plunger
Fig. 2 is a sectional view taken along the line
II-II of Fig. 1;
Fig. 3 is a sectional View taken along the line
III--IIIof Fig. 1;
and adjustably tensioned> by means of a cap mem
ber 44 which may be threaded into the inner end
of the bore 35. For the purpose of operating the
switch arms 22 and 23 in response to movement
of the plunger 31, an operating arm 45 may be
provided. The arm 45 may be suitably connected
to the plunger 3l, being, for example, secured to
a substantially L-shaped bracket 46 which may
be connected to the plunger by means oi? a stud 4l
projecting through an opening 4t in the cap mem
tion, electromagnetic, and provided with a brake
shoe ¿it normally biased against the wheel 'I3 by
means oi the spring te. An operating winding
¿il may be provided -lor actuating the shoe 85 away
from the wheel ’it when the locomotive is operat
in order to prevent overrunning of the cable
ber 44.
i2 from the cable reel "Il, the switch means I0
The plunger 3l may be provided with suitable
may be arranged to interrupt the energizing cir
locking means, denoted generally by the numeral 10 suit for the operating winding 83 of the switch
A50 to retain the plunger in the operated position.
and/or the operating winding 8l of lthe brake
For example, a latch member 52 may be pivotally
means. When the cable l2 becomes unwound
mounted by means of a pin 53 and projection 5d
on the central boss 35, having an end portion 5&5
from the reel ‘ll a predetermined amount, the
sleeve or obstruction E38 engages the core mem
arranged to project through an opening 56 in the 15 ber t3, moving it from its normal position in the
boss portion into an opening 5l in the plunger 3l
guide support it. The plunger S1 is thereby
when it is actuated to the operated position. A
actuated since the roller 42 is depressed by the
spring 59 may be provided for biasing the latch
sloping sidewall of the groove BG in the sleeve.
member 52 to engage the opening 5t in the
Accordingly, the arm 45 is actuated to engage the
plunger. Suitable means may be provided for re
rollers til and effect operation of the Contact
setting the latch member, such as the latch pin te,
arms 22 and §23, and separates the contact mem
which may be slidably positioned in an opening
bers [email protected] from the terminal members 2t. The
6| in the base portion of the casing and arranged
energizing circuits for the operating windings
to engage the end oi the latch member adjacent
and 6l’ of the switch t2 and the brake means,
the spring 59.
25 respectively are interrupted, The energizing cir
In order to eiîect operation of the plunger fil'
cuit oi the motor l2 is thereby interrupted, and
to actuate the switch arms 22 and 23 in response
the brake shoe Si: is applied to the wheel T3,
to predetermined movement of the cable i2, the
effectively stopping the vehicle and preventing
guide support I8 may be arranged to receive a
overrunning of the cable i2.
removable sleeve or core member 63 in the opening 30
39 and normally maintain it in predetermined re
lation to the plunger 31. The core member (i3
may be made of any suitable metal, insulating
material, or the like, and may be provided with a
tapered central opening 64 which receives and
normally functions to guide the cable i2.
the periphery of the core member 63 a groove or
recess 66 may be provided, wherein the roller ¿i2
of the plunger 31 may be normally seated. A
flange 61 may be provided at one end oi the core
member to engage the guide support I8 and per
mit readily aligning the groove lili with the roller
From the above description and the accom
panying drawing, it will be apparent that I have
ovided in a simple and inexpensive manner for
preventing operation of cable reel locomotives
beyond the point where the cable may become
detached :from the reel, Such a system provides
automatically for protecting the cable and re
lieves the operator from having to constantly
watch the cable during cable operation of the
locomotive to determine whether or not he has
reached the maximum point of cable unwind
ing. By utilizing my invention, anti-overrun
ning protection may readily be applied to existing
To effect movement or the core G3 from its
normal position, so as to operate the switch arms
changes in the existing apparatus other than
22 and 23, and thereby separate contact members
30 from the terminal members 2t, suitable
the substitution of the switch and cable guide
for the usual cable guide, and the attachment
as well as new apparatus without requiring any
means may be provided on the cable l2 such as,
ol a suitable obstruction or other operating means
for example, the split Sleeve or obstruction E8.
The sleeve 68 is of suilicient size to jam in the
opening 64, thus forcing the core (i3 from its nor
mal position and moving the roller 42 and plunger
31 longitudinally against the spring 43 so as to
effect operation of the switch arms 22 and 23.
to the cable at the desired point. These changes
may be readily made and involve only a minimum
Since certain changes may be made in the
above described apparatus and different embodi
ments oi‘ the invention may be made without
Referring to Fig. 5, the reference numeral 'lil
denotes generally a locomotive control system
wherein the control switch l0 is utilized to prevent
departing from the spirit thereof,
is intended
that all matter contained in the above descrip
tion or shown in the accompanying drawing shall
overrunning of a cable l2 on its cable reel ll.
be considered as illustrative and not in a limiting
oi` expense.
The vehicle motor denoted generally by the nu
meral 12 is shown as directly connected to one of
I claim as my invention:
the locomotive wheels 13 merely in order to
l. A cable operated switch comprising, an
simplify the diagram, and it is to be understood
explosion-proof casing, a pivoted switch arm
that the arrangement of the different elements as
mounted in the casing to engage a stationary
herein shown is merely illustrative. The motor
contact member, a plunger having a portion ex
'l2 may be normally connected through a control 615 tending through the casing operable to actuate
lei- 15 and transfer switch means 'it to either a
the switch arm, and a cable guide comprising
trolley type current collector 18 or through the
elongated support attached to the casing and
cable I2 and a suitable tap device 'i9 direct to the
having an axial opening, said support being pro
trolley conductor 80.
vided with a movable core member in the axial
Additional means such as the line switch S2 76 opening having an opening to receive the cable
having an operating winding 83 may be provided
and a peripheral recess to receive the projecting
for disconnecting the motor 'l2 from the cable l2.
portion of the plunger, said movable core mem
Suitable braking means may also be provided for
ber being readily removable from the support
the locomotive, being either eleotropneumatic,
by an obstruction on the cable, whereby the switch
hydraulic, or, as shown for purposes of illustra 75 actuating plunger is operated in response to a
predetermined movement of the cable without
appreciably straining the cable.
2. A switch comprising, an explosion-proof
casing, switch means mounted in the casing hav
ing a pivoted switch arm, a spring biased plunger
projecting through the casing and actuable to
operate the switch arm, and guide means for a
cable including a swivel support attached on the
outside of the housing and having a movable
core removably positioned therein with an open 10
ing to receive th‘e cable and a peripheral recess
to normally receive the projecting portion of the
plunger, said movable core being disposed for
on the support, a plunger carried by the support
and having an end portion normally positioned
in the recess of the sleeve, said plunger being
actuated in response to movement of the sleeve
from the opening in the support to operate the
switch means, locking means operable to retain
the switch means in the operated position, and
resetting means operable to return the switch
means to the closed position.
The following references are of record in the
file of this patent:
actuation by means attached to the cable which
readily removes the core from the support with 15
out appreciably straining the cable and actuates
the plunger to operate the switch arm, and lock
means operable to lock the plunger in the actu~
ated position.
3. A control switch comprising, a support hav 20 1,545,627
ing an opening, a sleeve removably positioned in
the opening having a ñange adjacent one end
adapted to engage a portion of the support to
position the sleeve in a predetermined position
therein, said sleeve having a peripheral recess 25
intermediate its ends, said sleeve having an open
ing to receive a cable and disposed to be removed
from the support by an obstruction secured to
the cable, normally closed switch means mounted
Levin ____________ __ Aug. 12, 1930
Avera ____________ __ Aug. 21,
Wohlel‘s __________ __ July 14,
Redmon __________ __ Nov. 2,
Redmon __________ __ Jan. 4,
Reese ____________ __ Aug. so,
Scott ____________ __ Jan. 29,
Koch _____________ __ July 14,
Field _____________ __ May 24,
Aalborg __________ __ Aug. 16,
Dìetsch __________ __ Mar. 21,
Apple ____________ __ Sept. 12, 1933
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