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Патент USA US2405769

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Aug„ 1.3, 1946.
F, STONER
2,405,769
CONTROLLER
Filed May 27, 1944
46
39
BY
Patented Aug. 13, 1946
2,405,769
UNITED STATES PATENT OFFICE
2,405,7 69
CONTROLLER
Frank Stoner, Lakewood, Ohio, assignor to The
Baker-Raulang Company, Cleveland, Ollio, a
corporation of Ohio
Application May 27, 1944, Serial No. 537,653
3 Claims.
(Cl. 172-179)
1
2
This invention relates to a controller and the
circuit controlled thereby for a vehicle, more par
the movement of the controller from neutral posi
tion to first speed position and then to a higher
ticularly circuit controlling means applicable to
speed position thereof, respectively, the closing
a vehicle, such as a tractor or one employed for
of the holding circuit by movement of the con
troller to the higher speed position being depend
ent on a “dwell” thereof at the first speed posi
handling loads where operating conditions make
it necessary to (a) change the speed of the ve
hicle during vehicle travel and (b) make quick
reversal of truck travel. Vehicles of this type are
commonly referred to as industrial tractors
and/or trucks. The trucks are employed for
loading and unloading operations, stacking and
de-stacking operations and transfer of parts and
products from one location to another location.
In most instances, of which I have knowledge, for
economical reasons, the operative for the tractor .
or truck is encouraged to carry out these opera
tions and effect truck travel from one location to
another as rapidly as possible. In tractor or
truck travel the aisles or lanes may be along a
circuitous route, due to turns, positioning of ma
chines and piled-up materials, so that it becomes
customary to speed up the tractor or truck in
straight-away sections of the route and quickly
slow down at turns. In load pick-up and dis
charge operations the truck is often driven for
tion.
Another object of the invention is to provide an
improved controlling means for the circuit of an
electric motor arranged to prevent reversal of
current to the motor when the latter is running
in either direction only by ñrst moving the con
troller to neutral position for operating the motor
in the opposite direction.
Another object of the invention is to provide
in an electric motor circuit having a contactor,
an improved controlling means for the contactor
consisting of a closing circuit and a holding cir
cuit connected to the motor circuit at opposite
sides of the contactor and a cam operated by the
shaft of the controller and arranged t0 substan
tially simultaneously close the closing circuit and
open the holding circuit, and vice Versa, whereby
the operation of the contactor is facilitated.
Another object 0f the invention is to provide
wardly and rearwardly with short quick impulses
an improved controlling means for the circuit of
of movement. Under these various operating
a variable speed electric motor wherein (a) a
conditions the operative attempts to slow up or
minimum amount of metal forming the contact
stop the traction motor of the tractor or truck
portions or conductors of the controller is re
by reversing the current thereto, instead of ap 30 quired to complete the circuit to the motor for
plying the vehicle brake, so that damage to the
each speed thereof and (b) the circuit for con
motor and the electrical connections, as well as
trolling the motor circuit is simplified to insure
undue strain on parts of the truck, resulted.
quick action either in initial closing of the motor
One object of the invention is to provide in a
circuit or subsequent breaking thereof.
motor driven vehicle an improved electric circuit
Other objects of the invention will be apparent
for the motor and a controller therefor wherein
to those skilled in the art to which my invention
provision is made to break the motor circuit in
relates from the following description taken in
dependently of the controller upon return move
connection with the accompanying drawing,
ment; of the latter from any operated position
wherein
thereof, thereby making it necessary to apply the 40 Fig. 1 is a diagram showing a controller, an
vehicle brake in reducing the truck speed and/or
electric motor, a circuit for the motor and a con
stopping the truck.
trol means incorporated therewith embodying my
Another object of the invention is to provide
invention.
an improved controlling means for operating an
Fig. 2 is a fragmentary perspective view of th'e
electric motor, wherein operation of the motor 45 controller.
at high' speed is dependent upon the initial op
Figs. 3 and 4 are detail views of parts shown
eration of the controller to and dwell thereof at
in Fig. 2.
a predetermined position.
In the drawing, II indicates an electric motor.
Another object of the invention is to provide
I2 indicates an electrical power supply, prefer
in an electric motor circuit having a contactor,
ably consisting of a suitable storage battery hav
an improved controlling means for the contactor
ing leads I3, I4, which through a suitable recep
consisting of a closing circuit and a holding cir
tacle and plug therefor are connected by leads
cuit connected to the motor circuit at opposite
I5, I6, respectively, to bus bars on a terminal
sides of the contactor and arranged to be alter
block Il.» Leads I8, I 9, connect the bus bars with
`Vmately closed by and in co-ordinated relation to 55 any other motor (not shown) with which the
2,405,769
É
¿i
vehicle may be equipped. Leads 2li, ZI, connect
the bus bars with a horn 22, which is controlled
iixed to the» adjacent supporting elementl 4I for
the controller 23. As shown in Fig. 2, the inter
by a push button 22a.
mediate portion of the arm 3l" is cut away to
23 indicates as an entirety a controller fixed to
a sha t E4 for rotation in one direction to close
accommodate a resilient arm 42 carrying a con
tact 42d arranged to engage contacts dia', 42a"
(see Figs. 3 and Ll) as later set forth. A flipper
43`forrnedof resilient material connects the arms
3l' and 42 together and normally tends to hold
them in either of two positions; that is, (a) when
the motor circuit, to thereby propel the vehicle
forwardly and in the opposite direction to re
verse the circuit connection with the motor,
whereby the vehicle is propelled rearwardly, the
controller and circuits being arranged to provide 10 the arm 3l’ rides fro-n1 the mid-section 31a of
three speeds in each direction, but my invention
carn 3l' or section 37C into either recess Sib, 31h',
is applicable where a lesser or greater number_of
vthe iiipper 43 is contracted and effects movement
of the arm 42 to the Fig. 3 position to cause en
speeds may be provided. The shaft 24 may be
operated through suitable >gearing» actuated'fby a
lever or wheel (the gearing and lever or wheel
gagement of the Contact 42a with the contact
Y42d’ >and (h) when the arm 3l’ rides outl of
either recess onto either section 37d, Ele, the
.flipper ,43 is contracted and forces the outer end
not shown). The controller is provided with (a)
conductors 23a, 23h, operable to close `the' motor
portionsof the arms 3l', 42, apart, whereby the
circuit when the motor is driven to _propel the
contact 42a engages a contact 42a” (see Figs. 2
vehicle forwardly and (b) conductors 23e, 23d,
2te, operable to close the motor circuit when the 20 and 4). The contacts 42a', 42a”, are carried on
the outer ends of resilient arms 42o, 42h', re
motor is driven to propelthe vehicle -rearwardly,
spectively, »which arms and arm 42 are formed
these conductors rbeing arranged to engage con
of suitable conducting material, for reasons later
tacts «I,-2, 3,
ii, 'I, in the manner later set
apparent. rThe inner ends of the arms 42, 42h
forth.
rPhe `motor »circuit consists of the following: 25 andßlilò’ are insulated from each other and rig
idly/supported at their inner ends between the in
lead 25 connecting one bus bar thro-ugh the mov
sulating pads 4%. As will
noted in Figs. 3 and 4,
able and stationary contacts 25, 25a, respectively,
the COntaCtsMâdQfL’lZd", are so spaced that slight
onthe supportvfor the contacter indicated as an
movement of the arm 42 effects disengagement
entirety at 2l, to the armature (indicated atZS)
o1" themotor Il, the contact 26 being normally 30 of the »contact 42a `from either thereof and en~
_gagernent with the other-contact and that the
disengaged from the contact Eta; leads 29, 30,
spring tension of the flipper y43 is arranged to
fr‘orn‘the motor armatureto contacts 2, 5, respec
operate the arm v¿l2 in either direction-with a
tively (the latter lead including «an adjustable
snap action, this arrangement and operation be
resistor R-B) ; leads 3I,«€?-‘2, connecting lield coils
ing advantageous Íto prevent de-energization of
33 of the motor I'Ivwith contacts I, 3, respectively,
the coil alla and breaking of the controlling cir
-itbeing‘noted that'when contacts 4I Vand 3 are
cuit during movement of the contact 4ta from
connected through'controller `conductors 23a, 23h,
the motor »i l is driveneto propel the vehicle for
wardly and -when contacts I »and 3 are connected
through'controller conductors-23C, 23e, and a lead
_3-4'therebetween, the motor I I is driven to propel
the vehicle rearwardly; lead 35 Vconnecting the
other-bus bar to contact 'I and having resistors
its »engagement with contact 42a’ into engage
»ment with contact 42a" due to operation _ofthe
controller in either _direction from first speed
R-I and -R--2 connected in series therein; Vand
ing circuit is‘traced as follows: lead 44 connect
ing contact 4 >through a manually operated switch
'45;t0 one end of the coil 27a; lead ‘46 >connect
ing _the opposite end of the coil Z'l'a 'to the arm
42; contacts 42a, 42a’; arm 4%;‘1ead 4l' connect
ing 4arm 42h with that Sectio-n of the lead 25
lead »SB `connecting contact ¿5 tothe remote end .
of resistorR-I.
The pivotedtcontactêô ispreferably weighted
so as tonorrnally be out of engagement with the
contactëtìa, but a spring 26a’ is provided to bias
it toits normal position, the springfunctioning
togive the contact an initial impulse following
cle-energization of the coil'Zla.
'
ri’he contactor 2l- consists of the switch Ycon
tacts ‘26, 26a (already referred to), andan elec
tro-magnet the coil-ì-"Ia of which, when energized
as ylater set forth, serves to move vthe -movable
contact into engagement -withethe contact 26a,
vto close thecircuit through the lead 25.
3l indicates a cam (formed of suitable in_su
lation material) yiixed to the controller shaft 24
for controlling a circuit indicated as an entirety
at
The `cam 3l is provided with a mid-sec
tion Sla, with which the outer end of -a resilient
`position-to second speed position.
_The controlling circuit 38 consists of a closing
circuit <38a and a holding circuit 38'. The clos
which is connected to v,the movable Contact 26;
leads ,£6,111 to battery I2; leads I3, I5, andlead
35 to. contact'î.
The `holding circuit 'äß’jis .traced `as `follows:
leadî44 .connecting contact 4 through theyswitch
4_5'to one end of> the coil'îla; _lead 46 connect
ing the opposite endof the coi112la ,to the arm
42; contactsç‘lëâa, 4-2a”; .arm _42b’;'lead 48 con
necting arm 142th' Ywith thatsection of the lead
_25 which _is connectedto thestationary contact
Zta; contacts `2Ela,126, and Yleadyäâ ,to bus-bar;
leads I5, I4 to battery i2; leadsiß, ,I5,_,and lead
>35 to contact '1.
,
The switch 45 Yis controlled .byaspring oper
arm l3l’ engages whenthe controller -is in “oli”
ated pedalpcsitioned vso as to -be cperated'by the
or neutral position, recesses S'l’b, 31h', at either
side of the mid-section Sla and co-ordinated with
the ñrst speed position of the controllerZS when
-the latter is rotated in either direction »and a
operative when ystanding in vehicle driving po
section Slo on which the arm 3l’ rides during
movement of the controller in either direction
from the first speed position to and from the sec
ond and/ or third speed positions back to the ñrst
speed position. The inner end of the arm 3l’
is rigidly supported between pads `34 formed of
sition.
As rthis switch is connected .in the con
trolling circuit, preferably îthe lead vwhich is con
nected to one end of the coil Ella, itfollows that
upon release of'this foot operated pedaLthe ccn~
,trolling .circuit `is broken, so that Aoperation of
the controller `in.either*direction will be «ineffec
tive.
'
Operation: With the brake released'and pedal
switch 45closed, operation of the controller and
insulating material and supported on a bracket 44 75 cam '3l ' (clockwise as shown in ~Fig. l) will ef
2,405,769
5
6
feet closing of the circuits 38a, 38', opening of
versed, the voltage drop will allow the movable
contact 26 to disengage the contact 26a and thus
the circuit 38a and engagement of the control-`
ler conductors 23a, 23h, with the contacts l to 1,
open the motor circuit. Due to the fact that upon
opening of the motor circuit the voltage imme
diately builds up in the battery, the movable con
tact will engage the contact 26a, following which
engagement, due to drop in the voltage, the con
inclusive, in the following manner: In this move
ment of the controller 23, certain of the con
tacts l, 2, 3, 4, 5, 6 and 1 will be connected by
the controller conductors 23a, 23h, in the first,
second and third speed positions thereof indicated
tact 26 will immediately disengage the contact
26a. Accordingly, this engagement and disen
at a, b, c, respectively. In the reverse movement
of the controller 23, certain of the contacts Will
be connected by the conductors 23C, 23d, 23e,
in the first, second and third speed positions there
gagement of the contacts will continue unless or
until the operative applies the vehicle brake
(thereby opening the controlling circuit through
of indicated at a', b', c', respectively. In the
ñrst speed position, the arm 31’ will ride into
recess 31b, thereby effecting engagement of contact 42a with contact 42a’ to close the closing`
circuit 38a through leads 44, 41, and coil 21a.
the switch 45) or returns the controller to neutral
position.
By reason of the fact that in propelling the ve
hicle in either direction the controller must be
held in its ñrst speed position until the movable
If the controller is held or dwells in this position,
contact 26 is actuated it becomes impossible to
long enough for the ñux to build up in the coil
drive the motor in the event the controller is
21a, the switch contact 26 will be moved into en-~ 20 operated to the second and/or third speed posi
gagement with contact 26a to close the motor cir~
tion without the dwell at the ñrst speed position;
cuit, whereupon the controller may be moved to
and since, with the motor running in one direc
second and third speed positions; however, if the
tion, operation of the controller to reverse the
controller is moved to the second speed position4
current to the motor will be ineffective to supply
without making the “dwell” above referred to, 25 current thereto, the operative is compelled to
the motor circuit will remain open, since the coil
apply the vehicle brake to stop the motor whether
21a will not be energized and effect closing of
the vehicle is to be brought to a stop or its direc
the contacter switch 26-26a. If the “dwell” at
tion of movement is to be reversed. The coil 21ov
the first speed position is made, operation of the
is removable so that it may be changed where the
controller to second speed position will, through 30 power supply is increased 0r decreased to insure
engagement of conductor 23h with contact 6, con
a balanced relation between it and the voltage
nect lead 36 in the motor circuit to reduce the
in the motor circuit.
current through the ñeld coils of the motor. In
From the foregoing description it will be ob
this operation of the controller, the arm 31’ will
served that the operation of the contacter 21 is
ride out of the recess 31h onto cam section 31e,
controlled by the circuit 38, which is initially
thereby moving arm 42 to effect engagement of
contact 42a thereon with contact 42a" to close
closed and maintained closed or opened by the
cam 31, and not through any conductor or con
the holding circuit 38' of the controlling circuit:l
tact portion on the controller drum, thereby en-38. As will be observed, the closing of the hold-1
abling me to provide a controller for the motor
ing circuit maintains the coil 21a energized, so 40 circuit having a minimum quantity of conductor
that the motor circuit through contactor switch
material (for example, copper) necessary to com2li-26a remains closed. If the controller 23 is
moved to the third speed position, controller con
ductor 23h engages contact 5 to connect in the
adjustable resistor R-3. As will be observed, in
the movement of the controller 23 to third speed
position and back to second speed position, the
arm 31’ rides on the cam section 31o so that the
plete the motor circuit for the different speed po
sitions in either driving direction. Accordingly,
45
as compared to the form of controller construc~
tion shown in my Letters Patent No. 2,140,564,
dated December 20, 1938, a substantial saving in
the quantity of metal on the controller results
and permits a reduction in the number of con
tact carrying arms 23’ (see Fig, 2) and total
holding circuit 38’ remains closed; but (a) if the
controller 23 is moved back to the ñrst speed pos- 50 length of the controller to facilitate the mounting
of other operating equipment on the vehicle
sition the arm 31’ rides into the recess 31h and
effects engagement of contact 42a with contact
frame.
42a’ to break the holding circuit 38’ and close
To those skilled in the art to which my inven
the closing circuit 38a, whereas movement of the
tion relates many changes in construction and
controller 23 to neutral position opens the clos
widely differing embodiments and applications of
lng circuit through coil 21a to de-energize the
the invention will suggest themselves without de
latter and break the motor circuit through the
parting from the spirit and scope thereof. My
contacts 26, 26a.
disclosures and the description herein are purely
In the operation of the controller 23 to propel
illustrative and are not intended to be in any
sense limiting.
the vehicle rearwardly, it and cam 31 are rotated
What I claim is:
counterclockwise (as viewed in Fig. 1) to the
ñrst speed position a’. In such movement, con
1. In controlling means for a motor circuit, the
ductors 23e, 23e, engage contacts 1, 3, respective
the holding circuit 38' closed if the controller is
operated to second speed position b’ in the man
combination with a motor, a controller and a
source of current supply, of a circuit for the motor
connected to lsaid source of supply, and control
ling means for said motor circuit comprising a
closing circuit, a holding circuit and a contactor
ner already described in operating the controller
consisting of normally disengaged contacts in one
and cam clockwise, provided a “dwell” at the ñrst
lead of said motor circuit arranged to close and
ly, and arm 31' rides into the recess 31h’ to close.
the closing circuit 38a, which is then opened and
speed position a’ takes place.
70 open it and an electro-magnet for operating one
of said contacts in one direction to engage the
The coil 21a of the electro-magnet is balanced
with respect to the power supply and resistance
other contact, the coil of said electro-magnet
value of the resistors R-|, R-Z and R-3 and
being in series with said closing and holding cir
the motor, so that if the latter is running in one
cuits and said closing circuit being connected to
direction and the current supply thereto is re 75 said lead at one side of said contactor and said
2,405,769
7
8
holding circuit being connectedto said lead at the
3'. In controlling means. for a motor circuit, the
combination with` a’ motor, a> controller and a
source of current supply, of a circuit for the motor
connected to said source of supply, -and control
ling means for said motor circuit comprising av
closing circuit, a holding circuit and »a contactor
consisting of stationary and movable contacts in
other side of saidy contactor, aV device synchronized
with the movement of said controller and a switch.
operated by said device to close said closing cir
cuit and open said holding circuit `when-.the con
troller is moved to one operating position and
open said closing circuit and close said holding
circuit when said controller is moved to another
operating position.
2. In controlling means for a motor circuit, the
combination with a motor, a contro-ller and a
source of current supply, of ay circuit for the ‘motor
one» lead of »said motor circuit in normally dis-y
engaged relation and- arranged to close and openl
it‘and an electro-magnet for` operating said mov
able contact in one direction` said'closing andv
holding circuits consisting of a lead in whichL the>
coil oi’ said magnet is series connected, a lead
for said closing circuit connected to said movable
connected to said source of supply, and control.'h
ling means for said motor circuit comprising a
closing circuit, a holding circuit and a contactor 15 contact and a lead' for said holding
consisting of stationary and movable contacts in
nected to said stationary contact, a
one lead of said motor circuit arranged to close
mally connected to> said lead for said
and open it and an electro-magnet the coil of
cuit an'd arranged to be connected
which is in series with said closing and holding
for‘said closing circuit and' a' device
circuit con
switch nor#
holding cir
to the lead
iixed to the
circuits, said closing circuit being connected to 2.0 shaft for said’ controller operable to disengage
said movable contact and arranged to be closed
said switch' from the lead for said holding circuit
when said controller is moved to its ñrst speed po~
and move it into engagement with the leadl for
sition and said holding circuit being connected
said
closing circuit upon movement of the con
to said stationary Contact and arranged to be
troller to its ñrst speed position and to disengage
closed when said controller is moved to a higher 25
said switch from the lead for said closing circuit
speed position, a switch arranged to close» said
and move it into engagement with the lead for
closing circuit and open said holding circuit when
said holding circuit upon movement of said c-on
the controller is moved to its first speed position
troller to a higher speed position, the operation of
and open said closing circuit and close said hold
Said electro-magnet to operate said movablecon
ing circuit when said controller is` moved to a
higher speed position and a cam ñxed to the shaft
tact being dependent on the dwell of the con
for said controller for controlling the operation
of said switch during movement of said controller.
troller at the ûrst speed position.
FRAl‘llEív STONER.
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