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Патент USA US2121547

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June 2l, 1938.
L.. s.v LOVE
STARTE‘R CLU-TCH FOR INTERNAL: COMBUSTION ENGINES
original Filed Mai-.ch e, 1953
2,121,547
Patented June 2l, 1938
2,121,547
UNiTED smrss
ATE'E`
FFICE
2,121,547
STARTER CLUTCH FOR INTERNAL COM
BUSTION ENGINES
Lawrence S. Love, Great Neck, N. Y.
Application March 8, 1933, Serial No. 659,997
Renewed November 9, 1937
3 Claims.
My invention relates to starting devices for
internal combustion engines as used in automo
biles, motor boats and the like and contemplates
an unique arrangement of clutch member which
:5 is scientifically designed to transmit a turning
motion fromv the electric starting motor to the
crankshaft of the internal combustion engine for
starting, but will permit over-riding when the
starting motor is idle or not required.
One of the principal dim'culties with starting
devices in common use is excessive breakage of
parts and frequent failure to function in ex
tremely cold Weather because of congealing of
lubricating grease. In designing this starting
device I have arranged to accomplish the desired
result of starting an internal combustion engine
without the use of delicate and complicated
mechanisms subject to breakage and also to
have the entire principal portion of the device
enclosed in an oil tight case in which it may
function in an oil bath, thereby eliminating
tendency to excessive wear from operating while
unlubricated or when covered with dust or road
grit. A further end achieved in this design is to
-- provide a quiet, simple, dependable starting
means which may be »manufactured at low cost.
In order that my invention may be more clearly
understood, reference is made to the accompany
ing drawing which forms a part of this specifica
tion and in which
Figure 1 is a front elevation showing a por
tion of an automobile engine and crankcase on
ing is permitted by reason of the fact that the
bore of collar I0 is a few thousandths of an inch
(too small to illustrate on the drawing) larger
than the diameter of sleeve 5. The key II is
firmly seated in sleeve 5, but the keyway therefor 5
in collar I0 is made large enough to accommodate
the necessary limited movement for centering.
From collar I0 links I2 lead toy and actuate toggle
blocks 9 moving them in a radial direction. At
the end of sleeve 5 but entirely free from con- 10
nection with it is flanged collar I3 which is a
tight fit on and keyed to crankshaft `I by key I4.
Collar I3 is sc designed as to surround by its
flanged periphery the toggle blocks 9. The entire
mechanism with the exception of sprocket 4 is 15
enclosed by case I5 and cover IS bolted to it, in
which are oil filler plug l1 and drain plug _I8.
Sealing against oil leakage is provided by gaskets
I9 and 20.
In operation when the electric circuit is closed 20
through the electric starting motor I, rotary mo
tion is transmitted through sprocket 2 and chain
3 to sprocket 4. This is keyed to sleeve 5,
which must turn with it. Sleeve 5 turns with it,
by means of its keyed connection, the collar I0. 25
As collar I!) starts to revolve it carries one end
of links I2 in a rotary direction. These links as
they move through an arc at the end connected to
collar I0 have a camming effect on and push
toggle blocks 9 radially from the center along 30
the dovetailed guides in guide block member 8
which due to inertia remains practically station
ary until the entire mechanism is in action when
it, too, revolves. As the toggle blocks advance
which mounting is effected.
Figure 2 is .a side elevation. of they device partly
in section to show arrangement of parts of pre
they grip inside of the flanged periphery of collar 35
ferred design.
` I 3 which is keyed to crankshaft 'I. The entire
Figure 3 is a front elevation. partly in section, mechanism being now firmly connected from the
on line 3-3 of Fig. 2.
electric starting motor I to the crank shaft 'I this
Figure 4 is a section on line 4-4 of Figure 3. turns as long as the starting motor is excited.
40
In the drawing is shown a starting device ac
When the internal combustion engine begins to 40
tuated by the conventional type of electric start
function and the circuit in the electric starting
ing motor I driving at suitable speed reduction motor I is cut, the cessation of rotating energy
by means of sprocket 2 and chain 3 in the direc
from the starting motor releases all parts of the
tion of the arrow to sprocket 4 which is a part
of the actual starting clutch. Sprocket 4 is
firmly affixed to bronze bushed sleeve 5 which it
turns by means of key E. Sleeve 5 is a running
?t on crankshaft 'I which is free to revolve with
in sleeve 5. Mounted on sleeve 5 and free to
move on it is toggle block guide member 8 which
has three dovetailed guides in which the toggle
blocks 9 may move in a radial direction. Adja
cent to the toggle block guide member is a ‘collar
I0 so ñtted as to permit centering when in ac
5 tion but keyed by key I I to sleeve 5.
The center
starting device from torsional strain, whereupon
spring 2| acting on lever extension 22 returns 45
collar I0 to its original position with lever exten- »
sion 22 resting against stop 23. The opposite end
of spring 2I is connected to a shouldered screw
fixed in a boss on the toggle block guide mem
ber 8. This movement returning collar I0 to its 50
original position pulls toggle blocks 9 from con
tact with flange I3 leaving it free to revolve with
the crankshaft 'I within case I5 and serving to
cascade oil over the entire mechanism, keeping it
thoroughly ñushed at all times. Stop 23 also 55
2
2,121,547
serves to prevent toggle block guide member B
from floating out of proper normal position and
~to prevent jamming of the device in case of back
firing of the engine.
It is to be understood that modifications may
be made in the form, details of construction,
arrangement of parts, or means of actuating the
device, without departing from. the spirit of the
invention or the scope of the appended claims.
10
Having described my invention, what I claim. is
new and desire to secure by Letters Patent, is:
1. In a starting mechanism for internal com
bustion engines an engine crankshaft, an annular
driving rig ñxed thereto, a sleeve freely mounted
on said shaft, a friction block guide member
freely mounted on said sleeve, a collar ñxed on
said sleeve, three equally spaced radially movable
friction blocks guided on Ways formed on the
said block guide member and linked to the said
20 collar and adapted to be expanded to contact the
driving ring in one direction of rotation and re
tracted in the other, spring means to return the
said friction blocks to a stopped normally disen
gaged position; and means to rotate the said
’ sleeve when starting.
2. In a starting mechanism for internal com
bustion engines, an engine crankshaft, an annular
driving ring fixed thereto, a sleeve freely mounted
on said shaft, a friction block guide member
freely mounted on said sleeve, a collar fixed on
said sleeve, three equally spaced radially movable
friction blocks guided on ways formed on the
said block guide member and linked to the said
collar and adapted to be expanded to contact
the driving ring in one direction of rotation and
retracted in the other, a spring means to return
the said friction blocks to a stopped, normally
disengaged position: a case to enclose the prin
cipal portion of the device, adapted to exclude
dust from the operating mechanism when in
operation: and means to rotate the said sleeve
10
when starting.
3. In a, starting mechanism for internal com
bustion engines, .an engine crankshaft, an annu
lar driving ring fixed thereto, a sleeve freely
mounted on said shaft, a friction block guide
member freely mounted on said sleeve, a collar 15
fixed on said sleeve, three equally spaced radially
movable friction blocks guided on ways formed
on the said block guide member and linked to
the said collar and adapted to be expanded to
contact the driving ring in one direction of rota
tion and retracted in the other, spring means to
return the said friction blocks to a stopped nor
mally disengaged position: a case to enclose the
principal portion of the device, adapted to ex
clude dust from the mechanism when in opera 25
tion; a screw plug near the top of the said case
and one near the bottom, adapted to permit ñlling
the case with oil and to drain and change the
oil to allow the device to operate in clean oil
at all times; and means to rotate the said sleeve 30
when starting.
LAWRENCE S. LOVE.
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