Cranking Device Page: 4 of 5
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1,307,400
rearwardly extending pin 26 which passes
through alining arcuate slots 26' formed
in the plates 13 and 18. Leaf springs 27
which are secured to the front face of the
5 plate 18, as at 28, engage the dogs 23 for
the purpose of retaining them in contact
with the periphery of the plate 20.
Pawls 29 are pivotally secured to the
front face of the plate 20 and are held by
10 springs 30 in contact with a ratchet wheel
31 which is mounted on the forward end
of the shaft 17 to turn therewith. Any
preferred means of securing _the ratchet
wheel 31 on the shaft 17 may be employed,
15 but as here shown the forward end of the
shaft 17 is reduced to provide diametrically
opposed flat faces or surfaces 17', thus mak-
ing the end of the shaft substantially oblong
in cross section. The ratchet wheel 31 is
20 provided with a central aperture corre-
sponding in outline to the outline of a cross
section of the forward end of the shaft 17.
It will thus be seen that the ratchet wheel
is free to be slipped on or removed from
25 the shaft and, at the same time, is locked
against rotation with respect to the shaft
while in place upon the shaft.
An arm 32 has a substantially oblong
aperture formed in one end thereof to per-
30 mit the arm to be mounted on the forward
end of the shaft 17, with which it turns.
The arm is provided, between its ends, with
an aperture 33 forming a bearing for a stud
34 which projects from the center of one
35 face of a spur gear 35.
A cup-shaped nut 36 is threaded on the
forward end of the shaft 17, and this nut is
provided with a slot 37 extending for a
short distance circumferentially thereof.
40 This slot is adapted to receive a sector of
the periphery of the spur gear 35 so that
the gear projects within the cupped por-
tion a-distance equal to the depth of the
teeth of the gear.
45 A plate 38 is centrally apertured to receive
the cup nut 36 and is also apertured to re-
ceive the forward ends of the bolts 12 by
which it is bound in place. An annular
rib 39 is secured to or formed on the rear
50 face of the plate 38 and its inner periphery
is provided with gear teeth to form an in-
ternal gear with which the spur gear 35
meshes.
The mechanism heretofore described is in-
55 cased or housed in a cylindrical casing 40
formed at its rear open or unheaded end
with a peripheral flange 40' which extends
outwardly and engages the forward face of
the plate 13 to which plate it is bolted or
60 otherwise secured. The head of the casing
40 is centrally apertured and about the aper-
ture is a forwardly extending annular flange
41 which provides a hub in which a stub
shaft 42 is rotatable. Rigid on the inner
65 end of the stub shaft 42 is a pinion 43which is rotatable within the cup nut 36
and is slidable longitudinally thereof to
mesh with the spur gear 35.
Adjacent its forward end, the stub shaft
42 is bored diametrically to receive a crank 70
arm 44 which merges into the angled end
or handle 44'. A block 45 is pivotally se-
cured to the other end of the crank arm-and
may be thrown to contact the flange 41, as
seen most clearly in Fig. 2, for the purpose 75
of retaining the pinion 43 out of mesh with
the spur gear 35.
A cam plate 46 is mounted for oscilla-
tion on the shaft 17 between the plate 13
and the bar 10 and its yoke 11, and this plate 80
has connected thereto the opposed links 47
to which are secured the rods or cables 48
through which the plate 46 may be rocked.
The ends of the cam plate 46 are adapted to
alternately engage the rearwardly extend- 85
ing ends of the pins 26 for the purpose of
forcing them outwardly and so lifting the
dogs 23 from engagement with the notch
22 and freeing the plate 20 to make a half
revolution under the impulse of the spring 16. 90
The rearwardly extending end of the shaft
17 is slotted for a short distance longitudi-
nally thereof, and through this slot extends
a pin 49 which is secured in a clutch member
50 and which serves to secure the clutch 95
member to the shaft to slide thereon. The
clutch member 50 may be moved back and
forth on the shaft 17 in any preferred man-
ner, as by means of the lever 51.
In practice the device is operated in the 100
following manner:-
To wind the spring 16, which forms the
motive power of the device, the block 45 is
thrown to a position the reverse of that
shown which releases the stub shaft 42 to 105
be thrust rearwardly and bring the pinion
43 in mesh with the spur gear 35. If now
the crank arm 44 be turned counter clock-
wise, the spur gear 35 will rotate clockwise
and revolve counter clockwise about the in- 110
ternal gear on the rib 39. The spur gear
35 will carry the arm 32 with it and thereby
rotate the shaft 17 counter clockwise.
During the movement just described, the
plate 20 will remain stationary, being held 115
by the frictional contact of the dogs 23 with
the periphery thereof. The pawls 29 will
click past the teeth of the ratchet wheel 31
and lock the shaft 17 against movement
clockwise under the impulse of the spring 16. 120
The purpose of interposing the pinion 43,
spur gear 35 and internal gear on the rib 29
between the crank arm and the spring is to
reduce the power necessary to be applied to
wind the spring. 125
After the spring has been wound, as above
described, the pinion 43 is again drawn out
of mesh with the spur gear 35. When the
engine is. to. be cranked, the clutch member
50 is moved into:engagement with its sup- 1300
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Reference the current page of this Patent.
Harris, Irvin F. Cranking Device, patent, June 24, 1919; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258783/m1/4/?rotate=270: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.