Transmission-Gearing. Page: 3 of 4
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1,288,605
rection by gear 4, when engaging therewith,
is a reverse bevel-gear 29, having a tubular-
hub 30, which is splined upon the adjacent
sleeve 8. The bevel gear 29 normally dis-
5 engages the bevel gear 4 and is held in this
outer position by a spring 31. The gear 29
is shifted inwardly to. engage with the gear
4 by reciprocatory members or plungers L2
pivotally connected with toggle joints 33,
10 which are in turn pivoted to the casing 1.
These toggle joints are spread by means of
- a reciprocatory member or rod 34, pivot-ly
connected therewith, as shown.
The numeral 35 designates shaft or axle
15 sections, which are independently rotatable
within the sleeves 8. Theseshaft or axle
sections project into the differential gear-
casing 9, and have bevel gears 36, rigidly se-
cured thereto. ' These bevel gears engage
20 with planetary bevel gears 37, pivoted upon
stub-shafts.38, formed upon a block 39 and
extending within openings 40, formed in the
casing 9. This is the construction of the
ordinary differential gear and it is therefore
25 thought unnecessary to further explain the;
same or its operation, it being sufficient to
state that the shaft-sections 35 which are
connected with the rear- wheels of the auto-
mobile, may rotate together, as when the
30 .automobile is traveling in a straight course,
or one shaft-section may rotate with respect
to the other, when the automobile is round-
ing a curve.
The operation of the apparatus is as-fol-
35 lows:
The driving shaft 3 may be' assumed to be
continuously rotated, with the shiftable
clutch-gear 26 in the neutral position,, and
the reverse gear 29 in the outer or inactive
40 position. To obtain either low intermedi-
ate or high forvfard speeds, the operator
shifts the clutch-gear 26 to-the position to
lock-the proper gear 10, 11 or 12 to the sleeve
8. for rotation therewith. It is thus appar-
45 ent that the rotation of the shaft 3 will be
imparted to the sleeve 8, and through the
medium of the differential gear to the shaft-
sections 35. When it is desired to obtain a
reverse speed, the clutch-gear 26 is shifted
50 to the neutral position, and the rod 34 is
moved forwardly .to bring the gear 29 into
engagement with the gear 4. The rotation
of the shaft 3 is therefore reduced and trans-
mitted in a reverse direction, to the sleeve
55 8, and by means of the differential gear, to
the shaft-sections 35.
It is:to be understood that the form of my
invention herewith shown and described is
to be taken as a preferred example of the
60 same, and that various changes in the shape,
size, and arrangement of parts may be re-
sorted to without departing from the spirit
'of the invention or the scope of the' sub-
joined claims.Having thus described my invention, I eG
claimr.:
1. In 'transmission . gearing of the char-
acter described, the combination with a diy-
ing shaft, of a. driven shaft, a plurality of
different speed driving gears rigidly secured 70
to the driving shaft, a corresponding num-
ber of different speed driven gears rotatably
mounted upon the driven shaft and pro-
vided with tubular hubs which telescope and
have their ends arranged in stepped rel& 75
tion, clutch-gears rigidly connected with the
tubular hubs, a disk rigidly connected with
the driven shaft and carrying a plurality of
arms extending substantially parallel with
the driven shaft, an annular shiftable so
clutch-gear mounted to slide upon the arns
and adapted for movement into engagement
with a selected one of the clutch-gears, and
means to shift the annular shiftable clutch-
gear. 85
2. In transmission gearing of the char-
acter described, the. combination with a driv-
ing shaft, of a driven shaft, a plurality of
different speed driving gears rigidly secured
to. the driving shaft, a corresponding num- 90
ber of different speed driven gears rotatably
mounted upon the driven.shaft and provided
with tubular hubs which telescope and have
their ends arranged in stepped relation,
clutch-gears rigidly connected with the tu- 95
bular hubs, a disk rigidly connected with
the driven shaft and carrying a plurality of
arms extending longitudinally of the driven
shaft, an annular shiftable clutch - gear
mounted to slide upon the arms and adapted 100
for movement into engagement with a se-
lected one of the clutch-gears, means to shift
the annular shiftable clutch-gear, a reverse
gear splined upon the. driven shaft and ar-
ranged upon the opposite side of the driving 105
gears with respect to the driven gears and
adapted for movement into and out of en-
gagement with and from one driving gear,
and means to shift the reverse gear.
3. In transmission gearing of the char- no
acter described, the combination with a dif-
ferential gear comprising a gear casing
sleeves connected with the gear casing and
arranged upon opposite sides thereof, shaft
sections extending through the sleeves.into 115
the gear casing, gears arranged within the
gear casing and connected with the shaft
sections, planetary gears pivotally connected
with the gear casing and engaging the first
named gears, a driving shaft arranged at ap- 120
proximately a right angle to the sleeves in
proximity to the differential gear, a plu-
rality of different speed driving gears rig-
idly secured to the driving shaft, a corre-
sponding number of different speed driven 125
gears rdtatably mounted upon one of . the
sleeves and provided with tubular hubs
'vhich, telescope and have their ends ar-
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Pilcher, Newton R. Transmission-Gearing., patent, June 4, 1918; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258056/m1/3/?rotate=270: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.