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Nov. 26, 3946.
Original Filed Dec. 3, 1940
2,41 3,@00
3 Sheets-Sheet 1_
Nov. 26, 1946.
Original Filed Deo. 3, 1940
3 Sheets-Sheet 2
NOV» 26, 1.946»
Originalv Filed Dec. 5, 1940
3 Sheets-Sheet 3
Patented Nov. 26, 1946
Romeo M. Nardcne, Westwood, N. Il., assigner to
Bendix Aviation Corporation, South Bend, End.,
a corporation of Delaware
@riginal application December 3, 1940, Serial No.
368,412. Divided and this application @ctober
l5, i942, Serial No. 462,204
3 Claims.
(Cl. F15-341)
rl‘his invention relates to electro-magnetic ap
Fig. 3 is a view, partly sectional and partly dia-=
grammatic, of the system or" which the unit of
Figs. l and 2 forms a part;
paratus, and more particularly to electro
magnetic apparatus adapted for use with
starters for engines of the internal combustion
Fig. 4 is a longitudinal sectional view oi the
inner assembly of the unit or" Figs. i and 2;
Fig. 5 is an end view with end-plate removed,
of the unit of Figs. l and 2;
Fig. 6 is a sectional view along line ß-ii of
One of the objects of the invention is to pro
vide novel electro-magnetic means for producing
engagement between an engine cranking mem
ber`and a member of the engine to be started.
Another object is to provide novel electro
magnetic means for controlling the cranking
and acceleration of the inertia member of an
Fig. 5; and
Fig. '7 is a transverse sectional View of the
unit of Figs. 1 and 2 along line l-l.
In Fig. 3 the system is shown as including an
engine cranking mechanism enclosed in a hous
ing lhaving two major sections 3 and il, which are
shown in Fig. 3 as they appear when viewed from
engine starter of the inertia type.
Another object of the invention is to provide
novel electro-magnetic means serving to estab
lish a definite relationship between operation of
the rear-end, that is, from the end remote from
the engine-engaging clutch member (not shown).
the accelerating and engagement producing
means above referred to.
Still another object is to provide novel elec
trically controlled means for achieving the ob
jects above set forth.
A further object is to provide ignition facili
A comparable cranking mechanism is shown in '
Fig. 1 of my Patent No. 2,156,602, grantedMay
20 2, 1939, and the engine-engaging clutch member
shown at lil! in said patent may be considered as
tating means operable in response to movement
of the engagement producing means above re
incorporated in the housing section d of the
cranking mechanism of the present invention, as
may also the reduction gearing and torque lim
ferred to.
25 iting mechanism of said patent. Likewise, the
Still another object of the invention is to pro
iiywheel 46 (constituting the inertia element)
vide novel circuit controlling means for operating
and motor 9 of said patent may be considered as
said ignition facilitating means.
incorporated in housing section ¿i of the cranking
A further object is to provide novel circuit con
mechanism of the present invention, for the pur
trolling means for producing joint operation of 30 pose of energizing the engine-engaging clutch
said ignition facilitating means and said engage»
member, and cranking the engine by way of said
ment producing means.
reduction gearing and clutch member when the
Another object is to produce apparatus of the
latter is moved to engine-engaging position by
foregoing character which is of relatively simple
endwise shifting of the clutch “meshing” rod
construction and readily accessible in all of its
which corresponds to the meshing rod löl of my
' component parts, yet having all of its compo
earlier patent, and which in the embodiment of
nent electrical parts fully encased in metal, ior
the present invention passes rearwardly through
protection of adjacent radio equipment against
housing section 3io receive (at its rear-end sec
reception-impairing interference.
tion shown in Fig. 3 herein) a bell-crank ‘ipcon
Other objects and advantages to be derived 40 stituting an operating connection to ‘transmit to
from the use of the invention disclosed will be
' the mesh-rod ii the actuating impulse of the
come evident on an inspection of the 1following
novel electrical means shown in Figs. 1, 2 and 4,
description when made with reference to the
and now to be described.
accompanying drawings illustrating one embodi
The novel electrical unit of Figs. l, 2 and e is
ment of the invention. It is to be expressly un 45 adapted to control not only the actuation of
derstood however that said drawings are for the
clutch meshing rod 5, but also. as heretofore in
purpose of illustration only and are not to be
dicated, the successive energization of, ñrst, the
construed as a deñnition of the limits of the in
vention, reference being had to the appended
claims for this purpose.
motor accelerating ‘flywheel and, subsequently,
the ignition facilitating unit which supplies high
Fig. 1 is a view, partly in section and partlyY
in elevation, of one of the units of the invention;
Fig. 2 is a sectional view of the unit of Fig. 1,
tension current to the engine during the actual
cranking period. For these purposes the unit
includes two electro-magnet coils, il and i2, the
former adapted to energize a magnetic pole
piece I3 rigidly secured within the coil enclos»
as it appears from a different angle;
ing >shell 8, and the coil i2 being adapted to
In the drawings:
' 55
@All LSQ@
within the ñexible metallic tubing section t6
which extends from the metallic battery outlet
fixture G5 to the metallic junction box lil which
screws into metallic switch housing Q5, the. latter
energize a magnetic pole-piece it similarly se
cured within- the opposite end of the shell 3.
Slidably mounted in pole-pieces i3 and tél is a
non-magnetic plunger i9 having transversely
disposed pins il, lt, to unite said plunger with
a central pole-piece l5 adapted to complete the
being mounted on starter housing section «3.- '
Elements t?, @t and t9 complete the radio-shield
ing of the electrical control circuits; the element
tl being a nexible tubing section extending from
junction box l@ to conductor inlet boss ‘l2 of the
magnetic iield of the pole-piece i3, or the mag
~ netic field of the pole-piece lil, depending upon
which of the two coils ll and l2, is energized; `
there being novel means provided for selectively 10 electro-magnetic unit, 2l, and the element 68
beinga similar ñexible tubing section extending
energizing either of said coils, but not both, at
from battery ñxture 65 to the housing t9 for the
any one time. Such \novel energizing means ~
manually controlled switch terminals 8l, 32,’ 33
will now be described.
and tél. The switch terminals 3l and 83 receive
For energization of magnet coil li, and also to
provide novel supporting and electrical shield l5 the battery conductors Sl and S2, respectively,
while the switch terminals 82 and Sli receive the
ing means for both coils ll and l2 and their
conductors d@ and 3i, respectively; the conductor
terminals, the supporting and shielding housing
3l being the one heretofore described as leading
2l of the unit has a partly circular and partly
to coil ll, and the conductor 30 being the one
rectangular contour, the circular portion being
leading to coil l2. A hand-operated plunger ibi
of just suücient extent to provide arcuate sec
projects from the panel-board E02 upon which
tions 22, 2t] extending below the widest part oi’
housing 69 is mounted, and said plunger has
vthe shell 8 and therefore adequately supportingv
an end section w3» of insulating material to re
said shell; while the rectangular lower portion
ceive a metallic collar lûêl adapted to bridge
of the housing 2i provides a shallow chamber
2t extending along the entire length of the shell 25 contacts 3l and Sä‘ when moved to the left of
neutral position; and when moved to the right
d and therefore providing a space to receive the
of neutral position, said collar bridges the con
cable 3l constituting the current feeding means
tacts 83., dll. A fire-wall ißt separates the en
for the coil li. With this construction the hous
ing 2l serves the two-fold purpose of support
gine starter from the operator’s compartment,
ing the shell d and at the same time providing 30 and is apertured to receive a rubber supporter
itl and the tubing section @t bearing thereon.
radio shielding encasement for the current con
With the foregoing in mind, it will be apparent
ducting windlng and `ithe conductor leading
that upon movement of plunger itl to the left,
thereto, without the necessity or“ the special me
current will ñow from battery i0@ to coil i2 of
tallic covering for the conductor itself.
In addition to actuating bell-crank 'ä and mesh 35 the unit 2l, the circuit being by way of con
ductor 9i, contacts di, ltd and 32, conductor 3Q'
rod â, the plunger l@ of nut @i has the func
toterminal lll of coil i2, >and back from coil
tion of controlling energization of the ñywheel
i2 to the battery by way of the grounded termi-accelerating motor and the ignition facilitating
na1 H2. (Figs. l and e); the opposite side of the
unit, as heretofore indicated. To this end the
rod 3G, which links plunger actuated bell-crank 40 battery being similarly grounded as indicated.
The now of current through the coil l2 which
3Q with _mesh-rod actuating bell-crank ï, (Fig.
is thus produced establishes a magnetic field to
3) is provided with an insulating section 3l'
attract the movable pole-piece l5 into engage
carrying a metallic collar d@ adapted to-bridge
ment with the stationary pole-piece ld and there
one or the other of two sets of terminal contacts
when moved from the normal (central) position 45 by produce a shifting of the plunger i9 to the
right as viewed in Fig. 2, whereupon the rod 36
by energization of coil il or coil i2 of the unit
of Fig. 3 is moved upwardly to an extent suücient
2l. The upper set di, di' oí’ terminal contacts
to cause collar 38 to bridge the contacts ¿il and
constitute part of the motor circuit, while the
lower set d3, dd constitute part of’the‘ circuit tov ' d2. A circuit is thereby established from the bat
primary and secondary windings il@ and ¿il of the 50 tery lßilto the iiywheel-accelerating motor, thev
circuit being traceable by way of conductor 63,
high tension current producing' unit which con
contacts di, 33 and 62, and the conductor Si lead
nects with the engine-driven ignition current
ing by an interior path from the terminal 52 to
distributor (not shown) by way of a metal
the commutator brushes or equivalent current
covered insulated conductor ¿ld leading from the
secondary or high tension side di of the induc 55 feeding means of the flywheel-accelerating motor.
The resulting rotation of the motor and the iiy
tion coil. This induction coil unit may be of a
wheel stores energy in the latter, which energy
conventional type having contacts 5i, an arma
will thereafter be transferred to the engine to
ture 53 in the magnetic held of the coil, and an
-impart initial rotary movement thereto, when- '
associated condenser ‘52 in circuit with the pri
mary winding, wherefore each vibration of ar do ever the operator elects to cause a shifting of the '
engine engaging member of the starter to the
mature 53 interrupts current flow and causes a
engine engaging position. The operator will in
passage, by induction, of a high tension current
through secondary winding ¿il and a resultant
' spark in the engine cylinder whose spark-plug
is at that moment in circuit with the rotating
distributor arm to which the lead-> @8 connects
in the usual manner, not shown. The entire
coll assembly is mounted in a grounded metallic
housing 5G attached to the starter proper, as
shown at 5l, 58, wherefore radio-shielding >en
casement of all electrical parts is effected. Cor
responding radio-shielding of the conductors 6l,
62, t3 and 6@ is provided; the conductors 6l and
62 being confined within the starter housing it
self, and the conductors 63 and @t being conilned
dicate this election by shifting the plunger I0!
to its extreme right position, in which position
65 the coil ll of the unit 2| will be energized, the
path of current ñow to said coil H being by way
of conductor 92, contacts '33, l0@ and 8d, and con
ductor 3| leading to the terminal H3 of the coil
ll; the return circuitfrom coil Il beingA by way
l0 of the grounded >terminal llt of` the said coil.
The magnetic ñeld resulting from this energiza
tion of the coil li-the field formerly prevailing
l having now collapsed by reason of the interrup
tion of the circuit to the coilY i2-results in a
75 shifting of the plunger I9 to its extreme left-hand
position as viewed in Fig. 2, whereupon rod 3i;
said chamber, whereby to insure protection of exn
moves downwardly to cause collar s@ to engage
contacts 43 and dit, and also to cause bell-crank
1, to shift the mesh~rod tinto the position in
which it moves and holds the engine engaging-v
’.ternally disposed adjacent radio equipment
member in the engine engaging position. The
energy previously stored in the 'starter willnow
be transferred to the engine and simultaneously
enclosing said coils and provided with end walls,
end pole-pieces ñxed to said end walls respec~
tively, a non-magnetic plunger slidably mounted
with such transfer a series of fuel igniting sparks
will occur in the combustion chambers or’ the en
gine by reason of the high tension current pro
ducing isaction
now energized
of the ignition
by. reason
oi the unit
iiow of
in said end pole-pieces, a central pole-piece car
ried by said plunger and moi/able therewith be
tween the confronting ends of said coils, an outer
` cylindrical shell ñtting closely about the greater
portion ci Isaid inner cylindrical shell and extend
ing axially beyond said inner shell to form a ter-`
minal chamber adjacent one end
said inner
current from battery in@ to the induction coil il'ë,
the said current flow being by way oi conductor
64, contacts t3,
and conductor
ing by an interior path from contact fill to the
terminal lili of the coil winding
the opposite
terminal lill of the unit being grounded as in
dicated. When these concurring 'cranking and
spark producing operations result in a starting
of the engine under its own power, the engine
engaging member moves bach to the disengaged
position by reason of the conventional construc
tion well understood in the art, and 'the operator
lbrings the energization or" the ignition facilitat
ing unit 55 to a conclusion by returning the
plunger lo! to the neutral position indicated in
Fig. 3, in which position ñow of current to the
against reception-impairing interference.
2. In electro-magnetic apparatus, a pair of
axially spaced coils, an inner cylindrical shell
shell, coils
for said
all external
said outer
being formed with a lengthwise extending and '
outwardly disposed section spaced from the lesser
lportieri or" said inner shell and coasting 'with said
lesser portion to form a passageway for encasing
the winding connections for both coils between
said shells and directing said connections into said
chamber whereby ‘to insure protection of enter
nally disposed adjacent radio equipment against
reception-impairing interference.
ln electro-magnetic apparatus, axially
spaced coils; a casing assembly having inner and
outer cylindrical shells arranged in substantially
coil ll ceases and both the rod
and plunger 30 concentric engagement, said inner shell enclosing
i9 return to the central neutral positions indi- said coils and provided with end walls; end pole
cated in Figs. 3 and 2, respectively.
This application is a division of my applicationV
Serial No. 368,412, ñled December 3, i940, now
Patent No. 2,301,071, granted November 3, i942.
What is claimed ist
l. In electro-magnetic apparatus, a pair or”
pieces ñxed to said end walls respectively; a non
magnetic plunger slldably mounted in said end
polenpieces; a central pole-piece carried by said
plunger and’movable therewith between the con
fronting ends of said Coils, said outer cylindrical
shell extending axially beyond said inner shell; a
partition on the inside of said outer shell adja
axially spaced coils, an inner cylindrical shell
enclosing said coils and provided with end walls,
cent one end thereof to provide a terminal cham
end pole-pieces ñxed to said end walls respec 40 ber and engageable with the adjacent end wall
tively, a non-magnetic plunger slidably mounted
of said inner shell, said outer shell being pro
in said end pole-pieces, a central pole-piece car
ried by said plunger and movable therewith be
tween the confronting ends of said coils, an outer
cylindrical shell fitting closely about the greater
portion of said inner shell and extending axially
beyond'said inner shell to form a terminal charn
ber adjacent one end of said inner shell, said
outer shell being formed with means extending
longitudinally thereof and in spaced relation with -
the lesser portion of said inner shell for enca'sing
the winding connections for both coils between
said shells and directing said connections into
vided with means for directing all external wir
ing for said unit into said chamber, said outer
shell also being formed with means extending
longitudinally thereof and in spaced relation with
the lesser portion 0f said inner shell for encasing
conductors for said unit between said Ishells and
directing said conductors into said chamber,
whereby to insure protection of externally dis
posed adjacent radio equipment agalnst recep
tion-impairing interference.
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