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Патент USA US2120625

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l June 14, 1938.
c. E.y PEcKl-:NPAUGH
`
2,ï20,625
LIFTING JACK
Filed May 21, 1937
2 sheets-sheet 2
Inventor
ß. ELPeckenpaugh
2,120,625
Patented June 14, 1938
UNITED STATES PATENT` orFlcE
2,120,625
LIFTING JACK
Charles Elija Peekenpaugh, Aylsham,
Saskatchewan, Canada
Application May 21, 1937, Serial No. 144,045
9 Claims.
The principal object of the invention is to pro
vide a lifting jack wherein the raising and lower
ing of the elevator member is accomplished by
upward and downward strokes of a suitably in
serted tool resulting in a step by step movement
in either direction.
A further object of the invention is to provide
a device of the above mentioned character having
duel rack standards and a pair of rack dogs co
"10 acting with said rack standards to support the
elevator member and to obtain leverage first
(Cl. 2511-110)
_
,
taken at -I---'I, Fig. 4 with the operating tool re
moved.
Fig. 8 is a perspective View of one of the rack
dogs.
'
Fig. 9 is a perspective view of the trigger mem- ï 5
ber.
Fig. 10 is an enlarged vertical section taken at
IIJ-I0, Fig. 1.
Fig. l1 is a vertical section taken at II--II,
Fig. 10.Y
f10
Fig. 12 is a perspective view of. the step lift lock
>from one standard and then from the other in the
and release bolt.
operation of said elevator member.
A further object of the invention is to provide
simple tension means to co-act with the rack
dogs to selectively hold said dogs momentarily
In the drawings, like characters of reference
indicate corresponding parts in the several
ñgures.
¿15
A rectangular shaped flat base I is provided
-witl1 a pair of spaced upwardly projecting stand
free of their associated rack standard in the
lowering operation of the elevator member.
A further object of the invention is to con
struct the jack whereby the» up and down move
ment of the elevator member is governed by re
verse positions of the tool member in the tool
f guide.
.A further object of the invention is to provide
.a side attachable step lift operable in conjunc
tion with the elevator member and releasably
connected thereto at all positions of said elevator
member.
Further objects of the invention are to con
struct the jack in a simple, compact, cheap and
durable manner and such that it cannot slip, to
provide a relatively narrow mechanism for in
sertion into awkward openings, a mechanism
having no receptacles for damaging objects to
oo C):
fall in andV one which can be quickly dismantled
ior repair or other purposes.
With the above important objects in view which
will become more apparent as the description
proceeds, the invention consists essentially, in
the arrangement and construction of parts here
inafter, more particularly described, reference
4being had to the accompanying drawings in
which,
Fig. l is a side view of the lifting jack.
Fig. 2 is a plan View thereof.
Fig. 3 is an enlarged vertical sectional View of
the lower part of the jack taken at 3_3, Fig. 1.
Fig. 4 is an enlarged horizontal sectional View
taken at 4---4, Fig. 1.
Fig. 5 is an enlarged horizontal sectional view
‘taken at 5»-5, Fig. l.
Fig. 6 is a partial vertical sectional view taken
at ß~--6, Fig. 4 with the step» lift removed.
Fig. 7 is a partial central vertical sectional view
ards 2 and 3 of a rectangular shape in cross
section. The interior sides of the standards are
each provided with a vertical series of ratchet t’20
teeth 4 and 5, the teeth on one standard being
in staggered relation with the teeth on the
opposite standard and said teeth are positioned
centrally of the standards, terminating a short
distance from either edge. The upper ends of the
lstandards are connected by a sill plate 6, slightly
wider than the standards and said sill plate is
provided with a rectangular central opening 1.
A solid elevator member 8 is vslidably received
between the standards, is of an H-shape in crosssection to span the ratchetteeth 4 and 5 and the
sides thereof are flush with the edges of the
standards. The upper part of the elevator mem
ber projects through the opening 'I and the upper
end is provided with a saddle 9 of slightly larger
horizontal area for contact with the objects to be
lifted. The lower end of the elevator member
is cut in on the sides adjacent the standard teeth
to provide a downwardly extending tongue I6. A
pin II extends centrally through the tongue and
the ends thereof are pivotally received by the side
arms I2 and I3 of a bale shaped member I4 which
spans the standards. The side arms of said bale
l"25
(30
<35
140
shaped member converge on one side of the jack
and form a guide I5 to receive a ñat operating î45
tool I6. `
A pair of dogs I1 and I8 (shown in Fig. 8) are
positioned below the elevator member and on
either side of the tongue I0. These dogs are of a
block shape and, on one side, are each provided 150
with a yplurality of ratchet teeth I9 which con
form with and engage the ratchet teeth 4 and 5
of the standards 2 and 3. The outer sides of the
dogs are also flush with the sides of the standards.
A pair of flat springs 20 and 2I are fastened to 55
2
2,120,625
the tongue Ill and are adapted to press against
up and the tension in the spring 38 holds the dog
the rear faces of the above mentioned dogs to
hold the teeth thereof in engagement with the
in the same way as above described.
teeth on the standards.
Each of the above mentioned dogs is provided
with drilled holes 22 and 23 which receive pins 24,
25, 26 and 21. These pins extend beyond the
dogs, on either side, and the pins 24 and 26 are
received in slots 28 and 29 on the side arms l2
and I3. Said slots are radial to the pin I I. The
pins 25 and 2'I project outward below the side
arms.
From the above arrangement it will be ob
served, that if the tool I6 is raised, the side arms
I2 and I3 will pivot on the pins 2li and through
the pin I I, the elevator member will be lifted. In
so doing, the dog I8 will be raised clear of its
associated rack teeth until a distance of one tooth
is reached when the spring 2I will press it into
If the tool is
then pressed down, the side arms will pivot on the
20 engagement with the upper teeth.
pins 26, lift the elevator member, and the dog Il
will rise until one tooth distance is reached and
then the spring 2l) will force it into engagement
25 with its associated rack. By such repeated up
and down movements of the tool, the elevator
member may be raised any desired height.
On either side of the jack, between the pins 24
to 2'I and at the side of the side arms I2 and I3,
30 I mount a trigger member 33 which is held in
place by cotter pins 3I which pass through and
connect the pins 24 and 25 and the pins 2t» and
21. The trigger members are each composed of a
narrow plate 32 having enlarged tapered ends 33.
35 At the centre of the narrow portion, the trigger
members are provided with an outwardly extend
ing stub 34 which is received within a slot 35 of
links 36, the upper ends of which are pivoted to
side bosses 31 on either side of the elevator mem
ber‘. A U-shaped spring wire 38 spans one side
of the jack, the ends are hooked into holes in the
links 36 and said spring is tensioned by a pro
jecting pintle 39 which passes through the ele
vator member Vand causes the central portion of
45 the spring to enter notches 4I! formed on the up
per edges of the side members I2 and I3.
One corner of the tool I6 is curved as at ¿II
while the opposite corner has a step cut-out 42.
The operation will now be described.
50
To lift the elevator member, the tool I6 is in
serted in the guide I5 as shown in Fig. 6 with the
curved corner on the top.
This curved corner
pushes the spring 38 out of thefnotches fit) and as
the tool is raised and lowered as described above,
55 it raises the elevator member and the spring 38
passes back and forth across the notches 4E.
When the elevator member is to be lowered, the
tool is removed from the guide and re-inserted
with the step cut-out 42 on the top. According
V60 ly, when the tool is raised to a horizontal posi
tion, the spring 38 drops into the notches 4i?.
When the tool is raised higher, the spring 38
free until it passes down to the lower rack teeth
By such
continued up and down movement, the elevator
member may be completely lowered.
On the sides of the` standard 2, I provide
grooves 43 to receive a pair of hooked lugs 44 of
a step lift «35. This step lift is of a T shape and
is slidable on the side of the standard while the
upper end is provided with a pair of further
hooked lugs ¿I6 adapted to enter grooves 41 on the
saddle 3. A dog ¿i8 is also pivoted to the upper
end of the step lift and is received within a cor
responding oriñcc 49 in the saddle and locked
therein by a lock bolt 5G passing through the l5
saddle. One end of the lock bolt has a square
shank 5l and the centre portion is cut away on
lthe side as at 52 in` order that when the bolt is
turned, the cut away portion will release the dog
d8' andrpe'rmit the step lift to drop. To accom 20
plish the turning of the lock bolt, a square hole
53 is provided in the tool I6 and accordingly, it
can be used as a wrench for the lock bolt. The
step lift has an advantage for railroad use in
that rails and‘ties may be lifted up, gravel in 25
serted underneath and the rail and ties dropped
to pack the gravel.
What I 'claim as my invention is:
l. In a lift jack, a pair of upstanding, spaced
rack standards and an elevator member slidably .30
mounted therebetween, a pair of: rack dogs ten
sicnally held in engagement with said rack stand
ards, an operable control bar pivoted to the elc
vator member and to each or" said rack dogs,
spring means controlling said rack dogs and re
leasably connected to said control bar for selec
tively withdrawing said dogs from their engaged
position on. said rack standards in the movement
of said control bar.
'
2. In a lift jack, a pair of upstanding, spaced
rack standards, and an elevator member slidably
mounted therebetween, a pair of rack dogs ten
sionally heldin engagement with said rack stand
ards, an operable control bar pivoted to the ele
vator member and to each of said rack dogs, a
trigger member for selectively moving said rack
dogs, a linl; member pivoted to said trigger mem
ber and said elevator member, and spring means
connected to said Vlink member Yand releasably
connected to said control bar for end shifting 50
said trigger member in the pivoting movement of
said control bar on said elevator member.
‘ 3. In a lifting jack, a pair oi upstanding spaced
standards having rack teeth on their opposing
faces, an elevator member slidably mounted be 55
tween said standards and having a downwardly
extending central tongue, a pair of rack dogs
positioned on either side of the tongue and the
teeth of said dogs engaging the teeth of the
standards under pressure of dual spring means
located between said dogs and said tongue, a con
trol bar pivoted to said tongue and said bar
exerts a tensioned pressure on the links 36 which
slotted to receive pivot pins projecting from said
end shifts the’trigger members Bil and the en
larged tapered ends thereof act on the pins 2li
and 21 to move the dog I8 out of engagement
with the rack teeth against the actionA of the
spring 2|. As the tool is lowered, the tension in
the spring 38 continues to hold the dog free, per
mitting it to pass down to the lower teeth of the
dogs, a trigger member associated with said dogs
rack, at which time, the spring 2 I is strong enough
to» force it into engagement therewith. As the
tool passes farther down, the spring 38 pulls the
links 36 and causes the dog I'I to Withdraw from
75 its associated rack teeth. The tool is -then moved
and adapted in its end movement to move one
or said dogs inward while the other dog remains
stationary, and secondary spring means con
nected to said trigger member and releasably
connected to said control bar to end shift said
trigger member in the movement of said con 70
trol bar.
4. In a lift jack, a pair of upstanding spaced
rack standards and an elevator member slidably
mounted therebetween, a pair of rack dogs ten
sionally held in engagement with said rack stand
3
2,120,625
ards, an operable control bar pivoted to the ele
vator member, each of said ra'ck dogs having pins
n pivoted in slots in said control bar, a trigger
mounted therebetween, a pair of rack dogs ten
sionally held in engagement with said rack stand
ards, an operable control bar pivoted to the ele
mechanism controlling the movement of said pins
vator member, each of said rack dogs having pins
in said slots, and means operating through said
pivoted in slots in said control bar, a trigger
mechanism controlling the movement of said pins
in said slots, an operating tool dually receivable
by said control bar, means for connecting said
operating tool with said trigger mechanism in one
receivable position of the operating tool to alter 10
nately withdraw the dogs from their associated
trigger mechanism for selectively withdrawing
said dogs from their engaged position on said
10
15
20
25
rack standards in the movement of said control
bar.
5. In a lift jack, a pair of upstanding spaced
rack standards and an elevator member slidably
mounted therebetween, a pair of rack dogs ten~
sionally held in engagement with said rack stand
ards, an operable control bar pivoted to the
elevator member and to each of said rack dogs,
spring means controlling said rack dogs, an oper
ating tool receivable by said 'control bar for oper
ating same, means for selectively connecting said
operating tool with said spring controlling means
when said operating tool is inserted in said con»
trol bar to selectively withdraw said dogs from
their engaged position on said rack standards in
the movement of said operating tool and control
bar.
6. In a lift jack, a pair of upstanding spaced
rack standards and reengage them therewith at a
lower elevation in the movement of said operat
ing tool and control bar.
8. In a lift jack, a pair Vof upstanding spaced
rack standards and an elevator member slidably
mounted therebetween, a pair of rack dogs ten
sionally held in engagement with said rack stand~
ards, an operable control bar pivoted to the ele
vator member and to each of said rack dogs, 20
spring means controlling said rack dogs and re
leasably connected to said control bar for selec
tively withdrawing said dogs from their engaged
position on said rack standards in the movement
of said control bar, a step lift slidably mounted 25
rack standards and an elevator member slidably on one of said standards, a dog pivoted to the
mounted therebetween, a pair of rack dogs ten -upper end of said step lift and held to said ele
vator member by a lock bolt rotatably mounted
sionally held in engagement with said rack stand
ards, an operable control bar pivoted to the elee in said elevator member, and means on said lock
30 vator member and to each of said rack dogs,
spring means for withdrawing Said dogs from
their engaged position on said rack standards, an
operating tool dually receivable by said ‘control
bar, means for connecting said operating tool with
35 said spring means in one receivable position of
the operating tool to alternately Withdraw the
dogs from their associated rack standards and
re-engage them therewith at a lower elevation
in the movement of said operating tool and said
control bar.
7. In a lift jack, a pair of upstanding spaced
rack standards and an elevator member slidably
bolt for releasing said pivoted dog upon the ro 30
tation of said lock bolt.
9. In a lift jack having a pair of standards
with a vertically movable elevator member there
between, a step lift slidably mounted on one of
said standards, a dog pivoted to the upper end 35
of said step lift and held to said elevator mem
ber by a lock bolt rotatably mounted on said
elevator member, and means on said lock bolt for
releasing said pivoted dog upon the rotation of
40
said lock bolt.
CHARLES ELIJA PECKENPAUGH,
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