Transmission Mechanism Page: 4 of 6
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UNITED STATES PATENT OFFICE.
HARRY E. STILLIANS, OF MARATHON, TEXAS.
TRANSMISSION MECHANISM.Specification of Letters Patent.
Patented Dec. 18, 1917.
Application filed .anuary 23, 1917. Serial No. 143,957.
To all whom it may concern:
Be it known that I, -HARRY E. STILLIANs,
a citizen of the United States, residing at
Marathon, in the county of Brewster and
5 State of Texas, have invented certain new
and useful Improvements in Transmission
Mechanisms, of which the following is a
specification.
An object of my invention is to provide"
10 a power transmission mechanism for motor,
vehicles, and it consists in the constructions,
combinations and arrangements, herein de-
scribed and~ claimed.
An object of my invention is to .provide
15 a transmission mechanism having the dif-
ferential driving devices and the transmis-
sion gearing inclosed in a single casing. .
Another object of the invention is to pro-
vide a gear housing being installed in its
20 place on the rear axle as, a unit.
Other objects and advantages will appear
in the following specification reference be-
ing had to the accompanying drawings
forming a part thereof in which:
25 Figure 1 is a side elevation of the im-
proved transmission casing,
Fig. 2 is a top plan view thereof,
Fig. 3 is a section on the line 3-3 of
Fig.1,
30 Fig. 4 is a section on the line 4-4 of
Fig.2,
Fig. 5 is a horizontal section on the line
5-5 of Fig. 1,
Fig. 6 is a cross section on the line 6-4l
35 of Fig. 5, and
Fig. 7 is a detail sectional view of a por-
tion of the device hereinafter to be re-
ferred to.
In automobile construction the present
40 practice is to mount the transmission mecha-
nism at some place centrally of the chassis
and adjacent to the engine, while the dif-
ferential mechanism is mounted on the rear
shaft.
45 By reference to the drawings and more
particularly to Fig. 5, it will be seen that
the drive shaft 1 projects into a casing 2.
The casing 2 is mounted on the rear end of
an automobile in a rigid manner and is ar-
5o ranged to receive the ends of the rear shaft
3. In the present instance the shaft 1 isconnected with the motor in any suitable
manner, a threaded portion 4 being pro-
vided to facilitate such connection.
Supported in the housing 2, is a gear cas- 55
ing 5. The gear casing 5 is rectangular in
shape and is open at its upper side so that
inspection of the mechanism therein may
be readily made. The casing 5 is also pro-
vided' with a flanged end 6 which is suit- 60
ably provided with bolt openings through
which the gear casing 5 may be secured to
their housing 2 as shown in Fig. 5, and
form a closure for the corresponding open
end of the housing 2. 65
The casing 5 forms the carrying member
for all of the driving gear mechanisms and
for this purpose is provided with suitable
bearings 7 and 8 wherein the shaft 1 and the
squared extension 9 thereon, are journaled. 70
Mounted on the squared shaft 9 is a worm
drive pinion 10 which meshes with a worm'
gear 11, so.that upon rotation of the worm
pinion 10 the gear 11 will be driven. Asso-
ciated.with the gear 11, is a gear housing 12,
which contains suitable planetary gear mech-
anisms whereby the shaft ends 3 of the rear
axle are driven in a well known manner.
The shafts 3 are journaled in suitable
bearings 13 in extensions 14 of the housing 80
2, and also in bearing pillars 15 disposed
adjacent to the gear housing 12. Supported
in other bearing portions of the casing 5, is
a counter-shaft 16 which as shown in Fig. 5
is disposed parallel to the shafts 1 and 9. 85
The shaft 16 has the usual reverse pinion
17, low gear 18, intermediate gear 19 and
driving gear 20, mounted thereon. A low
and reverse gear 21 is mounted on the
squared shaft 9 at one side of the worm 10, 90
while a high or second gear 22 is mounted
on the shaft 9 at the other side of the worm
pinion 10. The gear 21 cooperates with the
gears 17 and 182 while the gear 22 cooper-
ates with a driving.pinion 23 the pinion 23 95
being shown more particularly in Fig. 7
of the drawings. In Fig. 7 it will be ob-
served that the gear 23 is secured 'on the end
of the shaft 1 and is provided with a recess
24 arranged to receive roller bearings 25 100
on which-the rounded end 26 of the squared
shaft 9, is journaled. The gear 23 is also1,250,695.
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Reference the current page of this Patent.
Stillians, Harry C. Transmission Mechanism, patent, January 23, 1917; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258968/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.