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Патент USA US2122927

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July 5, 193s.
S. BOOTH
PRESSING'MACHINE
Fi led Dec. 20. 1935
2,122,927
Patented July 5, 1938
2,122,927
UNEED .STATES
¿PATENT yOFFICE
2,122,922
_
ß
PRESSING MACHINE
»
Stanley Booth, Leeds, England `
Application December Z0, 1935, `Serial-No. 55,485
In Great Britain April l.,VV 1935
4 Claims.
This invention relates to pressing machines of
the type including a pressing iron capable of be~
(C1. 744527)
desirable to retain the iron or buck in a depressed
position and for this purpose means have been
descends and ñlls the space between the piston
and the valve >I3 and thereby prevents any re
turn of such piston owing to the return pressure
of the liquid‘closing the valve. By this means
the foot lever 5 is held in the position at which 5,
the machine operator ceased to depress it and as
this may take place at any point between the
highest and lowest limits of the foot lever’s stroke,
infinitely variable adjustment of the iron Ais af
forded. This method of locking the iron allows 1u
a light/or heavy vpressure to be applied to any
thickness of materialjgarment or the like placed
upon the buck Ill without being limited to given
furnished capable of locking the operating means
stages,
ing passed over a so-called buck, or which in
cludes an ‘upper and lower buck, and wherein the
5 iron or upper pressing buck is depressed and
raised by means of a foot or other operating lever
.or equivalent means.
`
In the normal working of the above machine
the iron or buck is freely depressed or raised by
10 manipulation of the operating lever. At certain
periods during the operation of the machine it is
15 of the iron or buck.
Previously known locking means have included
To release the foot lever 5 the valve I 3 is opened 15
for the return flow of the liquid by any con
mechanical devices incorporating ratchet mem
bers which serve to hold the iron or buck but
venient control means such as a foot or hand
by way of example only:
is in the form of a flange furnished with a
` Fig. 1 is a sectional side elevation of a pressing
pendant ring I'I, and also with an upstanding
sleeve 4I8 which is slidably mounted in, and pro
jects lbeyond the top of the elongated boss I9 of
lever connected to the `valve by mechanical or
have only been capable of moving from one >tooth flexible operating means. If the valve is opened
20 to another of the ratchet whichA causes the lock
by i-its control lever simultaneously lwith the de- 20
ing means to be limited to `predetermined stages. ` pression of the-machine foot lever 5 the latter
AThe object of this invention is to provide simple will have unrestricted movement for raising and
but eilicient locking means capable of obviating lowering the iron I. It will be appreciated by
the above difficulty and of locking the iron or opening the valve I3 the piston II will simply
25 buck in a desired position within `the working re
pump liquid into and out of the pump barrel I2. 25
quirements of the machine, whereby the adjust
The pump element 8 shown in the drawing in
ment of said iron orA buck with respect to the cludes the pump barrel I 2 furnished with a liquid
y lower buck is adapted to( be inñnitely variable.
reservoir I 5 at its upper e'nd having access to the
Referring now to the accompanying> drawing in barrel only» through a valve member I6 provided
30 which an embodiment of this invention is shown
with the'spring closed valve I3. The valve I3 30
machine showing the improved locking device;
35
Fig. 2 is a sectional plan on line A-A of Fig. l ;
Fig. 3 is a sectional side elevation of the lock
ing device;
_
Fig. 4 is a sectional side elevation of the valve
structure.
>
In the drawing the locking device is shown ap'
40 plied to a well known type of pressing machine
including a pressing iron I adapted to be lowered
to its work through connections 2, 3, and 4 by the
depression of a pivoted foot lever 5 which auto
matically rises under the influence of springs 6
45 (or balance weights) and thereby raises the
iron
.
.
To the machine frame 'I is pivotally anchored
by means of the adjustable screws la, a pump
element 8 having its piston rod 9 anchored to the
'50 foot lever 5 in front of the lever pivot IIJ. As the
foot lever is depressed the piston II is drawn
downwardly in its barrel I2 by the piston rod 9
and the suction created‘above the piston opens,
or retains open, a spring closed release valve I3.
55 Liquid flows into the barrel I2 as the piston II
the valveßmember I6. The ring I'I is closed on its 35
underside >by a baffle piece 20 and liquid passes
into or- from the ring through lateral openings
2I. Seated within the ring I‘I is an auxiliary
valve 22 (provided with a stem 23) which nor
mally closes the ports 24 opening into the hollow 40
valve member I6. Communication is made with
the hollow valve member I6 from the reservoir I5
through the lateral ports 25 and when the valve
stern` 23 is slightly depressed for opening the valve
22, liquid returning from the barrel I2 will be di- 45
rected by the baffle piece 20 to the lateral openings
2 I. This arrangement prevents any tendency to
close the valve 22 as may be done by direct cen
tral pressure Yon the valve.
By opening the valve 22 the initial return pres- 50
sure of the‘liquid is released and flows through
the ring-I1 and valve member IE into the reser
voir I5.
Continued pressure on the stem 23
causes the collar 26 >(pinned on the stem 23) to
engage the sleeve I8 of the valve I3 and depress 554
2
"2,122,927
such valve for allowing the bulk of the liquid in
return of the liquid by the spring 21 after pres
What I claim ist
l. In a pedal lock for a machine oi the type
comprising a frame, a member supported for
movement on said frame, and mechanism includ
sure is` removed from the stem 23.
ing an operating element such as a foot lever for
To open the valves I3 and 22 the valve stem
23 passes up through the reservoir I5 and may
pass through the cap 28 so as to be engaged by
cap 28 so as to rest upon and operate the stem
displacing the said member in relation to the
frame; locking means for retaining the movable
member in any desired displaced position, said
locking means comprising a piston pump having
its cylinder connected to the said frame and hav
ing a downwardly extending piston rod connected
to said operating element, a liquid reservoir,
23. The pivoted lever 30 is operated by the
valve means comprising a main valve having a
aforesaid control means which in the drawing
comprises a front rod 32 anchored at its lower
end to the foot lever 5 and a rear rod 33 anchored
at its lower end to a bell crank lever 34. The
ported sleeve-like part projecting into the pump
cylinder, a seating within said sleeve-like part
the barrel to flow back through the valve mem
ber I6. The valves I3 and 22 are closed after the
the adjustable screw 29 of a pivoted lever 30 car
ried by the cap 28. Preferably a block 3| is
slidably located in the boss (or gland) of the
lever 34 is supported by a bracket 35 (ñxed to the
machine frame 1) and connected by a rod 36 to
the foot pedal 31 pivoted adjacent to the front
end of the foot lever 5. The rod 32 operates the
front end of the pivoted lever 30 through the
medium of the spring 38 and the adjustable nuts
39. A space is left between the nuts and the
spring to remove tension from the spring when
the foot lever 5 is raised so that the valves I3 and
22 will remain open due to pressure exerted by
screw 29. This also allows the foot lever 5 to be
depressed for part of its stroke before the pivoted
lever 30 is operated for releasing the valves I3
and 22 so that they may close immediately the
pressure of the machine operator’s foot is removed
from pedal 31 and foot lever 5. Such arrange
ment is provided owing to it being unnecessary
for general purposes for the iron I to be locked
other than when within a comparatively short
distance of the buck I4.
Further, the position
of the foot pedal 31 enables the machine opera
tor to place a foot on both the pedal 31. and foot
40. lever 5 simultaneously for the normal working of
the machine and such foot need only be drawn
off the pedal 31 for locking the iron. Moreover
the pedal may be quickly depressed for releasing
the iron I.
45 In operation (for locking the iron) the foot
lever 5 when depressed, lowers the piston II
which, when the valves I3, Y22 are automatically
released by screw 29, retains the main valve I3
open by suction for the down ilow of liquid which
50 locks the iron I by the liquid closing the valve I3
against its own return. During such downward
movement the rod 32 operates the pivoted lever
30 which raises the screw 29 clear of the block 3I
and pulls the rear rod 33 for raising the foot
'_ pedal 31 through the bell crank lever 34 and
rod 36. In this manner the foot pedal 31 is in
a raised position when the iron I is locked so
that the pedal simply requires to be depressed for
releasing the iron I by operating the valves I3
60 and 22 through rods 33, 36 and levers 30, 34.
To prevent leakage of the liquid down the
piston rod 9 a packing gland 40 is placed at the
bottom of the barrel I2. Furthermore, as liquid
may creep past the piston Il, air may be ex
65 hausted from the barrel I2 below the piston Il
through a by-pass 4I and adapted to carry any
liquid in the lower part of the barrel with it to
the liquid reservoir. To afford the easy addition
of liquid to the reservoir I5, a pipe 42 with a
funnel top 43’is attached tothe cap 28. The
funnel top 43‘is located immediately below an
opening (provided with a cover) in the machine
top 44 which allows easy‘access for liquid re
15.
plenishing purposes.
»
A
and a baille member closing the open end of said
sleeve-like part, and a pilot valve having its head
disposed in the said sleeve-like part to co-operate
with the said seating, said valve means being ar
ranged to permit ilow of liquid from the reservoir .
to the pump on movement of the said mechanism
to displace the said member and to close auto
matically upon cessation of such movement of
the said mechanism, and control means for open
ing the said valve means to permit> return flow
of liquid from the said pump to the said reservoir.
2. In a pedal lock for a machine vof the type
comprising a frame, a member supported for
movement on said frame, and mechanism includ
ing an operating element such as a foot lever for
displacing the said member in relation to the
frame; locking means for retaining the movable
so,
member in any desired displaced position, said
locking means comprising a piston pump con
nected between the said mechanism and the said
frame, a liquid reservoir, valve means arranged
to permit flow of liquid from the reservoir to the
pump on movement of the said mechanism to
displace the said member and to close auto
matically upon cessation oi such movement of 40
the said mechanism, said valve means compris
ing co-axial main and pilot valves, a sleeve con
nected to the said main valve for effecting open
ing movement thereof, a spindle connected to the
said pilot valve and extending through and be
yond the said sleeve for effecting opening move 45
ment of the pilot valve, a double-armed lever ar
ranged to act on the said spindle, means coupled
to the said operating element for exerting re
silient pressure on the said lever to maintain the
same normally in the inoperative position, a valve
control element on the said operating element,
linkage and lever mechanism connecting the said
lever to the said control element, and a loose
`slidably mounted element interposed between the
said lever and the said spindle.
3. In a pedal lock for a machine of the type
.comprising a frame, a member supported for
movement on - said frame, and mechanism in
cluding an operating element such as a foot lever
for displacing the said pressing member in rela- `^
tion to the frame; locking means for retaining
the movable member in any desired displaced
position, said locking means comprising a piston
pump connected between the said mechanism and
the said frame, a liquid reservoir provided at the "
top of the said cylinder, valve means arranged
to permit flow of liquid from the reservoir to
the pump on movement of the said mechanism to
displace the said member and to close automati
79
cally upon cessation of such movement of the
said mechanism, said valve means comprising
co-axial main and pilot valves, a sleeve connected
to the said main valve for effecting opening move
ment thereof, a spindle connected to the said pilot
3
2,122,927
valve and extending through and beyond the said
sleeve for effecting opening movement of the
pilot valve, a cap closing the said reservoir, a
double-armed lever mounted on the said cap and
arranged to act on the said spindle, means coupled
to the said operating element for exerting resilient
pressure on the said lever to maintain the same
normally in theinoperative position, a valve con
trol element on the said operating element, link
age and lever mechanism connecting the said
lever to the said control element, and a loose
element slidably mounted in a bore in the said
cap and interposed between the said lever and the
vsaid spindle.
4. In a pedal lock for a machine of the type
comprising a frame, a member supported for
movement on said frame, and mechanism includ
ing an operating element such as a foot lever for
displacing the said pressing member in relation
20 to the frame; locking means for retaining the
movable member in any desired displaced posi
tion, said locking means comprising a ‘piston pump
having its cylinder connected to the said frame
and having a downwardly extending piston rod
connected to the said operating element, a liquid
reservoir, valve means arranged to permit ñow
of liquid from the reservoir to the pump on move
ment of the said mechanism to displace the said
member and to close automatically upon cessa
tion of such movement of the said mechanism, a
lever arranged to act on the said valve means,
means coupled to the said operating element for 10
exerting resilient pressure on the said lever to
hold same in the inoperative position when the
said operating element is depressed, a valve con
trol element on the said operating element, link
age and lever mechanism connecting the said 15
lever to the said control element, a stuñing box
at the lower end of `the said cylinder through
which stuíiing box the piston rod passes, and a
by-pass passage leading from the lower end of
the said cylinder to the liquid reservoir.
STANLEY BOOTH.
20
`
Patent No. 2,122,927.
CERTIFICA'JJEl oF- CORRECTION.'
,
'
"
July 5, _1958.
Smm BOOTH.
It is hereby certified that error appears in the printed specification
of the above numbered patent requiring correction as follows: Page 2, >second.
column, line 61, and page 5, first column, line `19, claims 5 and LL respec
tively, strike out the word "pressing"; and that the said Letters Patent
shouldberead with this correction therein that the same may conform to
the record of the case -in the Patent Office.
Signed and sealed'. this 9th clayV of August, A. D. 1958.
Leslie
(Seal)
Frazer
Acting Commissioner of Patente.
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