Automobile-Jack Page: 3 of 5
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U NTEDS STATES PATENT OF IC.
CHARLES EDWARD DAVIDSON, OF.OZONA, TEXAS.
AUTOMOBILE-4AOK.1,168,935.
Specification of Letters Patent.
Patented Jan. 18,1916.
Application filed April 7, 1915. Serial No. 19,717.
To all 'hom it may concern:
Be it known that I, CHARLES E. DAVIDSON,
a citizen of the United States, and a resi-
dent of Ozona,- in the county of Crockett
5 and State of Texas, have, invented an Im-
provement in Automobile-Jacks, of which
the followingis a specification.
The present invention relates to a hoist-
ing apparatus, and more particularly to an
10 automobile jack adapted for use.in lifting
the vehicle after the same is stored in a
garage, whereby constant pressure on the
tires - will be avoided and the making of
necessary repairs facilitated.
15 Briefly stated, the invention comprises a
plurality of casings mounted in and extend-
ing below the flooring of a garage, each of
said casings having a lifting member in the
form of a screw spindle vertically movable
20 therein.
Primary driven shafts are mounted below
the flooring and operate secondary driven
shafts which in turn transmit power to
suitable means engaging the lifting mem-
25 bers, whereby the same may be elevated.
The primary driven shafts are suitably con-
nected to an operating mechanism compris-
ing a drive shaft geared up to said primary
driven shafts, said drive shaft being pref-
30 erably operated by a small motor. The in-
vention also contemplates providing suit-
able means operated by the upward move-
ment of the vehicle on the lifting mem-
bers to stop the motor at a predetermined
25 point.
The inventive idea involved is capable of
receiving a variety of mechanical expres-
sions, one of which for the purpose of illus-
trating the invention, is shown in the ac-
40 companying drawings; but it is to be ex-
pressly understood that said drawings are
used merely to facilitate the description of
the invention as a whole, and not to define
the limits thereof, reference being had to the
45 appended claims for this purpose.
In the drawings:-Figure 1 is a side ele-
vation of the invention, illustrating its ap-
plication. Fig. 2 is a top plan view thereof
with the flooring removed. Fig. 3 is an end
50 elevation of the invention, parts being broken
away and shown in section. Fig. 4 is an
enlarged cross section on the line 4-4 of
Fig. 3. Fig. 5 is a vertical section on the
line 5-5 of Fig. 4. Fig. 6 is a fragmentary
55 detail on the line 6-6 of Fig. 3 of the means
for retaining the lifting members in ele-vated position, and Fig. 7 is a detail side
elevation of the means contacted by the ve-
hicle in its upward movement to stop the
motor.
Referring more particularly to the. ac-
companying drawings in which like refer-
ence characters designate similar parts, the
numeral 10 indicates the flooring of a garage
and 11 one wall thereof. The flooring 10 is 65
provided with a plurality of openings 12
therein, the number of said openings being
optional, there being four shown in the
present construction. A bearing plate. 13
having a ball bearing race 14 in its upper 7
surface is bolted to the flooring as indicated
at~15 adjacent each of the openings 12 and
is provided with a centrally located screw
threaded opening 16 for the reception of the
upper end of an elongated cylindrical cas- 75
ing 17, which extends through the opening
12 in the flooring 10. The lower end of the
casing 17 is provided with a removable cap
18 whereby the parts in said casing are
rendered accessible should it be desired to 80
remove or repair the same. This casing 17
is adapted to contain a suitable lubricant
whereby the vertically arranged screw spin-
dle 19 in said casing may be lubricated.
The spindle 19 is screw threaded for the ma- 85
jor portion of its length as shown and is
provided at its lower end with a square head
20 upon which is mounted a guide plate 21
secured in position by the nut 22 and hay-
ing the oppositely disposed guide. grooves 9o
23 therein adapted to engage the vertically
arranged guide strips 24 secured to the inner.
wall of the casing. This construction pre-
vents any rotation of the spindle 19 during
its movement back and forth in the casing 95
17. The spindle is also provided at its up-
per end with a square head 25 adapted to
receive an axle engaging block 26. Mounted
between the block 26 and the bearing plate
13 is the worm wheel 27 having a hub 28 100
projecting into the casing 17 and provided
with an internally threaded opening for the
reception of the spindle 19, said wheel hav-
ing a bearing on the race 14 and being stead-
ied in its movement by the engagement of 105
the hub 28 with the end of the casing 17.
Mounted under the flooring 10,. so as not
to be interfered with when the vehicle is
driven into the garage, are the primary
driven shafts 29, one of which is adapted to 11C
operate the spindles for the front axle of the
vehicle while the other driven shaft operates
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Davidson, Charles Edward. Automobile-Jack, patent, January 18, 1916; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth857825/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.