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Патент USA US2109987

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March 1, 1938.
2,109,987
s. w. BOWER
CIRCUIT CONTROLLING DEVICE
Filed Sept. 19, 1936
3 Sheets-Sheet l
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INISUL A T/O/V
.2.
Inventor.
GeorgeWBowar,
by 7V
5
His Attor‘n ey
March 1, 1938.
G, w, BOWER
2,109,987
CIRCUIT CONTROLLING DEVICE
Filed Sept. 19, 1936
3 Sheets-Sheet 2
Inventor
George W. Bower‘,
ttor T1 e_y.
March 1, 1938.
‘
<;_ w, BOWER
2,109,987
CIRCUIT CONTROLLING DEVICE
Filed Sept. 19, 1936
3 Sheéts-Sheet 3
Fig.6. <
lrjverwtorz
6eor~2eW.Bovver~,
by
His Attorney.
2,109,987
I mama Mar. 1, 1938
UNITED STATES’ PATENT OFFICE 2,1”,987
I
.
‘
CIRCUIT
DEVICE
’ Georgc.W. Bower, Harbor Creek, Pa., assignor to
General Electric .Company, a corporation of
New York
\
Application September 19, 1936, Serial No. 101,621
10
My invention relates to circuit controlling de
vices, more ‘particularly to reversing or pole
changing devices for controlling an electrical cir
cuit in accordance with the direction of rota
5 tion of a rotatable member and has for an ob
iectv the provision of a simple and reliable device
of this type. ‘
Although devices embodying my invention are
not limited thereto, such devices are particularly
l0 applicable to electric systems of distribution for
vehicles in which an axle driven generator, whose
direction of rotation changes with the direction
of travel of the vehicle, is provided for charg
ing a storage ‘battery. In such systems, in order
I 15 to ensure that the generator will always be prop
(oi. zoo-so)
operating ?ngers and to retain the ?ngers in
the withdrawn position when the rotatable mem
ber is rotated above a predetermined speed.
More particularly, each of the operating ?n
gers is shaped like a bell crank, one end com
prising the weight and the other end compris
ing an operating portion. The ?ngers are dis
posed in different parallel planes and the con
tact actuating member comprises a carriage hav
ving a plurality of shoulders arranged in the 10
respective planes of the operating ?ngers. Means
are also provided for supporting the carriage
for movement in‘a. fiat ‘arc, the center of curva
ture of which is disposed on the same side/of
the carriage as the rotatable member so that the 15
for controlling the circuit connections of a gen
operating ?ngers are maintained in engagement
with the shoulders on the carriage during a
substantial portion of the movement of the car
riage. Likewise, overcenter spring means are
provided for selectively biasing the carriage to 20
one orv the other of its two positions and suit
erator in systems of this type and such devices
have been to a certain extent satisfactory. Be
on the carriage for selective wiping engagement
erly connected to the battery, means must be
provided for reversing the generator connections
whenever the direction of rotation of the gen
erator is reversed.
'
Various devices have heretofore been provided
able contact members are resiliently supported
cause of the relatively large currents encountered ' with cooperating stationary contacts.
25 in controlling the generator armature connec
tions, such devices must be quite rugged and
because of the restricted space limitations en
countered, I have found that it is advantageous
to mount such control devices on or adjacent to
30 the generator housing below the generator shaft.
In so far as‘I am aware, devices heretofore pro.
posed are not adaptable for mounting in such a
position. Much is yet to be desired, therefore,
in a device of this type and accordingly it is a
35 further object of my invention to provide a de
vice of this character which is rugged in its con
struction, which is capable of carrying relatively
large currents ‘and which maybe mounted on
or adjacent the generator housing below the
40 generator shaft.
_
In carrying out my invention in one form, I
provide a plurality of operating ?ngers pivot
ally supported on a rotatable member, one end
' of each ?nger‘being-weighted to effect pivotal
45 movement‘of the ?nger so that the opposite end
thereof extends outwardly from the lower side
of the rotatable’ member during a portion of each
revolution. Disposed below the rotatable mem
' ber, I provide a movable contact actuating mem
50 ber which is selectively operable between two
positions by one or the other of the operating
?ngers, ‘depending upon the direction of rota
_ tion of the rotatable member. The weights and
the ?ngers are so disposed that the centrifugal
55 forces developed are effective to ‘withdraw the
_
For a more complete understanding of my in
25
vention, reference should now be had to the
drawings in which Fig. 1 is an elevational view,
partly in section, of a circuit controlling device
embodying my'invention; Fig. 2 is a. plan view
of the device shown in Fig. 1 with certain parts 80
broken away and others shown in broken lines
more clearly to illustrate .the constructional de
tails; Fig. 3 is a sectional view, taken along line
3—3 of Fig. 1; Fig. 4 is a similar sectional view,
taken along line 4-4 of Fig. 1; Fig. 5 is a. frag
mentary sectional view, illustrating the movable
contact structure; Fig. 6 is a detail view in ex
ploded perspective of certain operating parts
of the control device; and Fig. 7 is a. circuit dia
gram illustrating one manner in which my im
proved control device may be applied to a bat
tery charging system.
Referring now to the drawings, I have shown
my invention as applied to a circuit controlling
device comprising a frame iii adapted to be se
cured to a portion of the generator housing ii
(Figs. 3 and 4) the frame in being provided with
an aperture i2 through which the shaft l3 of
the generator extends when the frame Iii is se
cured to the generator housing by suitable bolts
it. As shown in Fig. 3, the end of the generator
shaft is provided with a ?ange ii, to which is
secured a rotatable member or rotor l6 by suit
able bolts' l1, one of the bolts I'I serving also
as a pivot pin for a pair of operating members
2
2,109,957
l8 and I 9. These operating members i8 and I9,
as shown best in Fig. 6, are substantially L_
shaped and resemble bell cranks, one end of each
member comprising a weighted portion 20 and
2| respectively and the other end of each bell
- crank comprising an operating ?nger 22 and 23
respectively.
,
ing arranged to engage a V-shaped bearing in
a pin 4| which extends crosswise of the carriage
21 with its outer ends disposed in suitable aper
tures 42 formed in the walls of the carriage. As
shown bestin Fig. 3, this bearing pin 4| is pro
vided with suitable shoulders 43 to prevent longi
tudinal movement of the pin and a pair of sup
porting shoes 44 are provided, one of the shoes
being disposed in each of the apertures 42 so as
The operating members l8 and I9 are mount
ed in different parallel planes on their pivot pin
10 l1 and are so arranged that the weights 2!) and
to retain the bearing pin 4| in the position shown 10.
2| e?ect pivotal movement of the members l8 best in Figs. 1 and 3.
and iii to cause the ?ngers 22 and 23 to- extend
In Fig. l, the carriage 21 is shown in its ex
outwardly from the lower side of the rotatable treme right-hand position and it will be ap
member l5 during a portion of each revolution. parent that when the carriage is moved in a left
15 Likewise, it will be seen that the members l8
hand direction, the overcenter spring 35 will be 15
and i9 are arranged to move in opposite direc
compressed and carried over—center, the bias of
tions about their pivot, that is, the weight 2|, j the spring being reversed as soon as the knife
when the rotatable member approaches the posi
edge bearing 39 passes over the knife edge bear
tion shown in Fig. 1, causes the operating mem
lugs 31, whereupon the spring 85 will bias the
20 ber I! to move in a counterclockwise direction carriage 21 towards its extreme left-hand posi
about its pivot so that the operating ?nger 23
extends outwardly as shown, and it will be ap
Extending downwardly from the lower side of
parent that when the rotatable member |5 reaches the carriage 21 I provide a plurality of'pairs of
a position 180 degrees from the position shown supporting ears 45 which carry a plurality of
25 in Fig. 1, the direction of rotation being as shown bearing pins 45, 41, 48 and 48, respectively. As
by the arrow 24, the weight 20 will effect clock
shown best in Fig. 4, these bearing pins are insu
wise movement of the arm l8 about its pivot lated from the supporting ears 45 by suitable in- r,
so as to move the operating ?nger 22 outwardly sulating members 55, 5| and 52.
from what will then be the lower side of the
Supported on the bearing pins 48 and 48 is a
30 rotatable member- l5. A suitable stop member substantially T-shaped ‘contact member 53 (Fig.
30
25, which comprises a bar secured to the rotat
5) the stem portion of which carries a‘ plurality
able member |5 by a screw 25 (Fig. 1), is ar
of contacts 54 and 55 and the cross portion of
ranged for engagement by the weights 25 and which is provided with a plurality of open bear
2| so as to limit the outward movement of the ings 55 for engaging the ‘bearing pins 48 and 45.
35 operating ?ngers 22 and 23 as the rotatable Normally, the contact member 53 is biased to the
member I5 is rotated.
midposltion shown in Fig. 5 by a plurality of coil
Disposed below the rotatable member I5, I pro- , springs 51, the opposite ends of' which engage a
vide a contact actuating carriage 21 (Fig. 6) , the spring seat 58 which abuttingly engages por
upper side of which is provided with a plurality tions of the frame 21 and is held in-the position
of ears 28 which form supports for a pair of shown in Fig. ,5 by engagement of an ‘open hear
50
bearing pins 29 (Fig. 1), the bearing pins 28 ex
tion.
tending through suitable bifurcated operating
links 35, shown best in Fig. 4, the upper ends of
which are carried by bearing pins 3| supported
by the frame In. Thus, it will be‘ seen that the
carriage 21 is supported by the links 35 for move
ment in an arc, the center of curvature of the
are being on the same side of the carriage as the
rotatable‘ member l5 for a purpose which will be
more fully described hereinafter. Intermediate
the ears 28 the upper side of the carriage 21 is
provided with an irregularly shaped recess 32
into which the operating ?ngers 22 and 23 ex
tend when moved outwardly from the rotatable
member l5 by the weights 20 and 2| respectively,
the opposite sides of the recess 32 being formed
to provide shoulders 33v and 34, respectively, dis
posed in the paths of movement of the ?ngers 23
and 22 for engagement by the ?ngers.
60' In order to bias the carriage 21 to its extreme
left-hand or extreme right-hand position, as
viewed in Fig. 1, I provide overcenter spring
means vcomprising a coil spring 35, the lower end
of which rests in a spring support 35, which in
65 cludes a pair of knife edge bearings 31 extend
ing outwardly from the sides thereof and adapted
to rest in V_-shaped supporting bearings formed
'
'
‘
~
‘
'
ing 58 with the bearing pin 25. Similarly, the
bearing pins 45 and 41 support a tiltable contact
member 50 which carries a pair of contacts 5|
and 52 and which is resiliently held in engage
ment with the bearing-pins 45 and 41 by a pair of 45
coil springs 53, a suitable spring support 54 be
ing provided for the coil springs.
Disposed on opposite sides of the tiltable con
tact 53 for selective engagement by the contacts
54 and 55, I provide a pair of stationary contacts 50
55 and ,55, similar contacts 51 and 58 being ar
ranged on opposite sides of the contact member
55 for selective engagement by the contacts 5|
and 52. The stationary contacts 55 to 55 in
clusive are respectively supported on conductor 55
bars 59, 10, 1| and 12 which, as shown best in
Fig. 4, extend rearwardly and aresupported on
the frame l5 between suitable insulating mem
bers '13. The stationary contacts 55 and 51 are
electrically connected together, for a Purpose
which will be more fully described‘ hereinafter, in
connection with the circuit diagram shown in
Fig. 7, by a bus bar‘ 14 which is-el'ectrically con
nected to the supporting conductors 15 and 1|.
so
Similarly, the stationary contacts '55 and "are
electrically connected together by a bus bar 15
at
which is secured to the rear ends of the con
in a support 38 which extends outwardly from the ductors 55 and 12.
frame it, the support 38 being apertured as
It will be apparent, of course, that the bolts
shown best in Fig. 3, to permit the spring sup
15 and .11 (Fig. 2), which serve to‘connect the
port 35 to extend therethrough. The upper end , bus bars 14 and 15 to the conductors 55 and 12
of the coil spring 35 engages a knife edge bear
inclusive, may be used for connecting the con
ing member 39, which is supported on a tubular
guide post 40 disposed within the coil spring 55,
the upper edge of the bearing member 35 be—
trol device in the external circuit to be con
trolled and, as shown best in Fig. l, the mov
able contact member 53 is connected by a ?exible
70
3
2,109,987
my improved control device automatically ac
complishes the above described circuit changes
conductor 18 to a suitable terminal member 18
supported on and insulated from the frame I8, a
similar ?exible conductor 88 being provided for
connecting the movable contact member 88 to a
similar terminal member 8|.
,
With the above constructional details clearly
in mind‘, it is believed that a complete under
standing of my ‘invention may now be had from
a description of the operation. Referring ?rst
to Fig. 7, in which similar parts represented dia
grammatically are represented by similar refer
ence numerals, I have shown somewhat dia
in accordance with a reversal in the direction
of rotation of. the generator armature will now
'be described. In Fig. 1, the movable carriage 21
is shown in its extreme right-hand position,
which position corresponds to the dotted position
shown in Fig. '1 and it will be assumed that the
generator now begins to rotate in the direction
indicated by the arrow 24 in Fig. 1. As herein 10
before described, the weight 2| moves the op
erating ?nger i5 about its pivot in a counter
grammatically my control device as applied to a clockwise direction as the rotatable‘ member |8
battery charging circuit in which a generator‘ approaches the‘ position shown in Fig. 1 so that
provided with an armature 82, a shunt ?eld 83, the operating ?nger 23 extends outwardly from 15
and a series ?eld 84 is arranged to charge a r ‘a e lower side of the rotatable member and into
he recess 32 in the carriage 21. The various
storage battery 85, the circuit connections of the
parts are shown in Fig. 1 at the instant when the
generator armature being controlled by'my im
proved control device so as to reverse the con
nections of the generator armature each time
that the direction of rotation of the generator is
reversed.
v
-
With’the generator armature rotating in the
direction indicated by'the arrow 88, it will be
25 assumed that the brush 81 of the generator is
the positive terminal and brush 88 is the nega
tive terminal. Accordingly, current will ?ow
from the armature of the generator through the
brush 81, the series ?eld winding 84, and the con
30 ductor 89 to the bus bar 1501' the control device.
With the movable contacts of the control device
tip‘of the finger 23 has just engaged the shoulder
83 on the carriage 21. Since the st0p'25 pre 20
vents further counterclockwise movement of the
operating member is, it will be apparent that
upon continued rotation of the rotatable mem
ber l8, the operating finger 23 urges the carriage
21 in a left-hand direction. As the carriage v25
moves in this direction, the bias of the over
center spring 35 is reversed, when the knife
edge bearing 39 passes over the knife-edge bear
ings 31, and the carriage 21 will thereupon be
operated by the overcenter spring 35 to its ex 30
treme left-hand position so as to disengage the
contacts 55 and 82 from the stationary contacts
88 and 88 respectively and to engage the contacts
and 54, which are now in engagement, to the . 54 and 8| with the stationary contacts 85 and
81 respectively.
35 movable contact member .53 and from the mov
As hereinbefore described, the carriage 21
able contact member 53 by way of the ?exible
moves in an arc, the center of curvature of which
conductor 18 to the terminal 18 which is con
is on the same side of the carriage as the rotat
nected to the positive side of battery 85 by a con
ductor 98 and to the shunt ?eld winding 83 by a able member |8. Accordingly, the carriage fol
conductor 9|. Accordingly, the current divides lows the path of movement of the ?nger '23 to 40
part of the current ?owing through the battery some extent and theiinger 23 is thus maintained
85 and part through the shunt ?eld 83 by way of' in engagement with the shoulder‘ 33 for a larger
the conductors 88 and 9| and by the conductors portion of the movement of the carriage 21 than
82 and 93 to the terminal 8|. From the terminal would be possible if the carriage moved in a
8|
the current then ?ows through the ?exible straight line or moved in an are having its center 45
45
conductor 88 to the movable contact member of curvature on the opposite side of the carriage
in the position shown in Fig. '7, the current will
?ow from the bus bar 15 through the contacts 85
88 and through the contacts 8| and 81, which
are now in engagement, to the common bus bar
14. This bus bar 14 is connected by means of
the conductor 94 to the negative terminal 88
of the generator and accordingly the current re
turns to the generator armature by way of this
conductor 94 and brush 88.
It will now be assumed that the generator
55 having been brought to a stand-still, is rotated
in a direction opposite to that indicated by the
arrow 88. As will be more fully described here
inafter, rotation of the generator in this direc
tion immediately effects operation of the control
device to the position indicated in dotted lines
in Fig. 7 so as to reverse the armature connec
'05
tions of the generator and thus connect the
brush 88, which is now positive, to the terminal
19, the negative brush 81 being connected to the
terminal 8|. The circuit from the brush 88 to
the terminal 19 may now be traced through the
conductor 94, the bus bar 14, the movable con
from the rotatable member |8.
As soon as the contacts 55 and 82 are disen
gaged from the stationary contacts 88 and 88
respectively, it will be apparent that the resilient
means comprising the coil springs 51 and 83
will operate the contact members 53 and 88 to
the respective midpositions shown in Fig. 5.
The arrangement of the stationary contacts 85
to 88 inclusive relative to thé contact members 55
53 and 88 is such that with the contact members
in the midposition the contacts 54 and 8| will
engage the stationary contacts 85 and 81 respec
tively before carriage 21 has reached its extreme
left-hand position. Engagement of these con 60
tacts, however, will not prevent further move
ment of the carriage 21 since the overcenter
spring 35 exerts a considerably greater force than
the coil springs 51 and 83. Accordingly, the
carriage 21 continues to move in a left-hand 85
direction and the contact members 53 and 88 are
tilted on the bearing pins 48 to 49 inclusive to a
tact 53, and by way of the ?exible conductor 18 . position opposite from the position shown in
to the terminal 19, and the circuit from the ter
70 minal 8| to the negative brush 81 may now be
traced through the ?exible conductor 88, the
movable contact 88, the bus bar 15, and by way
of the conductor 89 and the series ?eld winding
84, to ‘the brush 81.
15
‘Referring now to Fig. 1, the manner in which
Fig. 1; that is, the contact members 53 and 88
will rest on the bearing pins 48 and 48 respec 70
tively and will move away from the bearing pins
41 and 48 respectively so as to compress the
right-hand ones of the coil springs 51 and 83.
Thus, a wiping action of the contacts is obtained
and a uniform contact pressure maintained be 75
2,109,911?
tween the contacts with the 'carriage? in either
many modi?cations may be made and I, there
of its extreme positions.
fore, contemplate by the appended claims to cover
-
When the carriage 21 reaches its extreme left
hand position, the proper circuits will be coni
pleted, as described in connection with Fig. 7, and
as the generator continues to rotate in the direc
tion indicated by the arrow 24 in Fig. 1, the ?n
gers 22 and 23 will be operated by their asso
ciated weights 2!! and 2|, so that the ?ngers ex
10 tend outwardly from the rotatable member l6
- during a portion of each revolution. With the
carriage in this extreme left-hand position, how
ever, the ?nger 23 will pass freely through the
recess 32 without engaging the shoulder 33, and
15 the ?nger 22 will engage the upper side of the
carriage 21 adjacent the shoulder 34. This en
gagement of the ?nger 22 with the carriage 21,
however, has no eifect other than to move the
?nger 22 inwardly against the bias of weight 20
and to cause a slight clicking sound once during
each revolution.
'
This inward and outward operation 01 the ?n
gers 22 and 23 continues only so long as the gen
erator rotates below a predetermined speed. As
25 soon as the speed of the generator is. increased
above this predetermined speed, the weights 20
and 2| are effected by the centrifugal forces de
veloped so as to withdraw the ?ngers 22 and 23
and to maintain them at all times within the
30 outermost periphery of the rotatable member IS.
The inward movement of the ?ngers 22 and 23
under the centrifugal force developed is limited
by engagement of the ?nger 22 with a shoulder
35 formed on the rotatable member l6 and, simi
35 larly, inward movement of the ?nger 23 is limited
by engagement of the ?nger with the shoulder 96
formed on the rotatable member I6.
' So long as the generator continues to rotate in
any such modi?cations as fall within the true
spirit and scope of my invention.
What I claim as new and desire to secure by
Letters Patent 01' the United States is:
1. A circuit controlling device comprising ‘a ro
tatable member, a pair of independently movable
operating ?ngers mounted for movement relative
to said member, weights on said ?ngers for caus
each revolution thereof so long as said member is
rotated below a predetermined speed, said weights
Peing arranged to withdraw said extending ?n 15
gers and to retain said ?ngers in withdrawn posi
tion when said member is rotated above said pre
determined speed, and means disposed below said _
rotatable member for selective operation by said
?ngers between two positions depending upon the 20
direction of rotation of said rotatable member.
2. A circuit controlling device comprising a ro
tatable member, a pair 01' independently movable
bell-crank members pivotally mountedon said
rotatable member, one end of each of said bell 26,
cranks comprising a weight and the other end of
each bell-crank comprising an operating ?nger,
said weights being effective to move said operat
ing ?nger outwardly from said rotatable member
during a portion of each revolution when said 30
rotatable member is rotated below a predeter
mined speed, and said weights being effective
under the centrifugal i'orces developed to move
said ?ngers inwardly and to retain said ?ngers
in withdrawn position when said rotatable mem
her is rotated above said predetermined speed,
and means disposed below said rotatable member
for selective operation between two positions‘ by
said ?ngers in accordance with the direction of
this direction, the movable carriage 21 will remain
in its extreme left-hand position and if the gen
erator is stopped and then started again in the
rotation of said rotatable member.
same direction, no movement of the carriage 21
will be effected and the slight clicking action
caused by engagement with the ?nger 22 with
the upper side of the carriage 21 will continue
only so long as the generator rotates below the
ally mounted on said member for pivotal move
ment in di?erent parallel planes as said member
predetermined speed.
’
If, now, the generator is brought to a standstill
and started in the opposite direction, the ?nger
60 22 will engage the shoulder 34 and will move the
carriage 21 in a right-hand direction in a manner
similar to that described above, thereby reversing
the bias exerted by the overcenter spring 35 and
effecting a snap movement of the carriage 21 to
55 the extreme right-hand position shown in Fig. 1.
With the carriage in this position, and the rotat
able member IG rotating in a direction opposite
to ‘the direction indicated by the arrow 24, it will
be apparent that the operating ?nger 23 engages
60 the upper side of the carriage adjacent the ?nger
33 and causes a slight clicking sound which con
tinues only so long as the generator rotates below
the predetermined speed.
It may, inv some cases, be desirable manually
65 to operate the carriage 21 between its extreme
positions. Accordingly the spring support 36 is
provided with an aperture 36a in alignment with
the tubular guide post 40 into which an operating
bar or lever may be inserted to operate the spring
70 support and the guide post about they knife edge
bearings 39 so as to move the spring 35 over
center.
,
While I have shown a particular embodiment
of my invention, it will be understood, of course,
that I do not wish to be limited thereto since
10
ing said ?ngers to extend outwardly from the
lower side of said member during portions of
'
3. A circuit controlling device comprising a ro
40
tatable member, a pair of operating ?ngers pivot
is rotated, weights on said ?ngers for causing said 45
?ngers to extend outwardly from the lower side
of said rotatable member during portions or each
revolution thereof, said weights being arranged -
to move said ?ngers in opposite directions about
their pivots to cause outward movement thereof.
means for limiting the outward movement 01' said
?ngers, a switch actuating member movable be
tween two positions disposed below said rotatable
member, and shoulders on said switcliactuating
member arranged in the respective planes of said 55
?ngers whereby one of said ?ngers engages one
of said shoulders to operate said switch actuating
member to one position upon rotation of said
rotatable member in one direction, and the other
of said ?ngers engages another of said shoulders
to operate said switch actuating member to a
second position upon rotation of said rotatable,
member in the opposite direction.
4. A circuit controlling device comprising a
rotatable member, a pair 01' operating ?ngers
pivotally mounted on said member for pivotal
movement in different parallel planes as said
member is rotated, weights on said ?ngers for
causing said ?ngers to extend outwardly from
the lower side or said rotatable member during 70
portions oi.’ each revolution, said weights being
arranged to move said ?ngers about their pivots
in opposite directions and said ?ngers extending
from opposite sides of said rotatable member
when moved outwardly, stop means for engaging 75
8,109,987
5
position, means supporting said carriage for
'said weights to limit the outward movement of movement in an- are having its center of curva
said ?ngers. a switch actuating member disposed
below said ‘rotatable member for movement be
tween two positions, and shoulders on said switch
actuating member arranged in the respective
planes of said ?ngers whereby one of said ?ngers
engages one of said shoulders to operate said
switch actuating member to one position upon
rotation of said rotatable member in one direc
10 tion, and the other of said ?ngers engages an
other of said shoulders to operate said switch
actuating member to a second position upon
rotation of said rotatable member in the oppo
site direction.
5. A circuit controllingv device comprising a
15
rotatable member, a pair of bell-crank member:
mounted on said rotatable member for pivots >.
movement in di?erent planes, one end of each ( ,
said bell-cranks comprising a weight and th
20 other end of each bell-crank comprising an oper
ating ?nger, said weights being a?ected by grav
' ity to move said operating ?ngers outwardly
from the'lower side of said rotatable member
during portions 01’ each revolution when said
rotatable member is rotated below a predeter
mined speed, stop means for limiting the out
ward movement of said members, a contact actu
ating member disposed below said rotatable mem
ber for movement between two positions, and
shoulders on said actuating member arranged
in the respective planes of said operating ?ngers
for engagement by said extending ?ngers, where
by said ?ngers selectively move said actuating
member between said two positions in accord—
35 ance with the direction of rotation of said rotat
able member, said weights being a?ected by the
centrifugal 'forces, developed to withdraw said
?ngers and to retain said ?ngers in withdrawn
position when said rotatable member is rotated
above said predetermined speed.
6. In a control device; the combination or a
rotatable member, operating ?ngers carried by
said member arranged to extend outwardly there
from, a movable carriage disposed adjacent said
45 rotatable member for movement between two po
sitions, shoulders on said carriage arranged for
selective engagement by one or the other of said
?ngers depending upon the position of said car
riage and the direction of rotation of said rotat
50 able member, the engagement of said ?ngers with
said shoulders being effective selectively to move
said carriage from between two positions, and
ture on the side 0! said carriage adjacent said
rotatable member, whereby said ?ngers engage
said ‘shoulders during a substantial portion 01'
the movement oi’ said carriage, and control
means controlled by said' movement of said car
riage.
8. In a control device, the combination of a
rotatable member, a pair of independently mov 10
able operating ?ngers pivotally mounted on said
member, weights on said ?ngers for causing said
?ngers to extend outwardly from the lower side
of said member during portions of each revolu
tion when said member is rotated at less than a 15
predetermined speed, stop means for limiting the
outward movement of said ?ngers, a movable
carriage disposed below said rotatable member,
shoulders on said carriage arranged for selective
engagement by one or the other of said ?ngers,
depending upon the position of said carriage and
the direction of movement of said rotatable
member, the engagement of said ?ngers with said
shoulders being e?ective to move said carriage
between said positions in accordance with the
direction of rotation of said rotatable member,
and means for supporting said carriage for move
ment in an are having its center oi curvature
above said carriage, whereby said ?ngers engage
said shoulders during a substantial portion of the
movement of said carriage.
9. A circuit controlling device comprising a
rotatable member, a pair of bell-crank members
mounted on said rotatable member for pivotal
movement in different planes, one end of each
of said bell-cranks comprising an operating
?nger and the other end of each bell-crank com
prising a weight for moving the associated oper
ating ?nger outwardly from said rotatable mem
ber during a portion oi! each revolution when 40
said rotatable member is rotated below a prede
termined speed, stop means for limiting the out
ward movement of said'?ngers, a movable car
riage disposed adjacent said rotatable member
for movement between two positions, shoulders 45
on said carriage arranged for selective engage
ment by one or the other of said ?ngers depend
ing upon the position of said carriage and the
direction of rotation of said rotatable member, '
said ?ngers thereby selectively operating said w
carriage between said two positions in accord
ance with the direction of rotation of said rotat
able member, means for supporting said carriage
means supporting said carriage for movement inv for movement in an arc having its center of
an are having its center of curvature on the side curvature on the side of saidcarriage adjacent 55
55 of said carriage adjacent said rotatable member, said rotatable member, whereby said ?ngers en
whereby said ?ngers engage said shoulders dur
gage said shoulders during a substantial portion
ing a substantial portion of the movement of said or the movement of said carriage, and contact
carriage.
means controlled by said carriage, said weights
7. A circuit controlling device comprising a being a?ected by the centrifugal forces devel 60
rotatable member, operating ?ngers carried by oped when said rotatable member is rotated above
said member arranged to extend outwardly there
said predetermined speed to move said operating‘
from, a movable carriage disposed adjacent said ?ngers inwardly.
rotatable member for movement between two cir
10. A circuit controlling device comprising a
cuit controlling positions, overcenter spring
65 means for selectively biasing said ‘carriage to
either of said two positions, shoulders on said
carriage arranged for selective engagement by
one or the other of said ?ngers depending upon
the direction of rotation of said rotatable mem
70 ber and the position occupied by said carriage,
the engagement of said ?ngers with said shoul
ders being effective to move said carriage from
its biased position to reverse the bias 0! said
overcenter spring means, whereupon said car
75 riage is operated with a snap action to its second
rotatable member, operating ?ngers carried by
said member arranged to extend outwardly there
from, a movable carriage disposed adjacent said
rotatable member for movement between two
circuit controlling positions, overcenter spring
means for selectively biasing said carriage to 70
either of said two positions, shoulders on‘said
carriage arranged for selective engagement by
one or the other of said ?ngers, depending upon
the direction of rotation of said rotatable mem
ber and the position occupied by said carriage. 75
6
2,109,987
the engagement of said ?ngers with said shoul
thereby as said carriage moves‘between said two
ders being e?ective to move said carriage from positions, said tiltable contact being arranged to
its biased position to reverse the bias of said ' engage said stationary contact ‘before said car
pvercenter spring means, whereupon said car
riage reaches its extreme positions, said over
riage is operated with a snap action to its second‘ center spring means being effective to complete 5
position, a tiltable contact member on said car
the movement of said carriage against the force
riage, resilient means normally biasing said con-' ' of said resilient means, whereby said contact
tact member to a midposition, and cooperating member is tilted and a wiping action is obtained
stationary contacts disposed on opposite sides between the contacts.
'
10 01' said contact member for selective engagement
(moms w. nowm 1o
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