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Патент USA US2135919

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Nov. 8, 1938.
R. v. STREETER
2,135,919
ELECTRIC CONTROL DEVICE ECR LINCTYPE MACHINES'
Filed Jan._.2l. 1938
2;@_1 '
2 Sheets-Sheet l
Nov. 8, 1938.
R. v. sTRl-:ETER
2,135,9194
ELECTRIC CONTROL DEVICE FOR LINOTYPE MACHINES
2 sheets-sheet 2
2,135,919?
Patented Nov. 8, 1938
U
STATES PATENT oFFicI-J
.2,135,919
ELECTRIC CONTROL DEVICE FOR LINOTYPE
MACHINES
Ralph V. Streeter, Minneapolis, Minn.
Application January 21, 1938, Serial No. -186,136
12 Claims. (Cl. 1539-31)
My invention relates to mechanism for lifting machine is raised by depressing the handle II,
the assembling elevators of type-casting machines and returns to its normal lowered position re
and particularly to power-operated, electrically sponsive to the pull of gravity when the handle
II is released. When the assembling elevator 8
controlled elevator-lifting apparatus.
In the usual conventional forms of type-cast
ing machines such as the Linotype machine, the
assembling elevators are lifted by application of
muscular effort on a manually operated lifting
lever. With such machines the manually oper
lo ated lifting lever constitutes an undesirable ob
struction and operation thereof'causes fatigue of
the operator.
It is an »object of my invention to provide a
power-operated mechanism for lifting the assem
bling elevato-r of a type-casting machine.
Ano-ther object is to provide such a mecha
nisrn wherein application of lifting effort may
be initiated by manipulation of an easily oper
ated manual control element and automatically
20 terminated at the pro-per point in the cycle of
operation of the type-casting machine.
Still another object is toprovide such a mecha
nism of an electrically controllable nature.
A further object is to provide such mechanism
of light, compact, simple, inexpensive, easilyv in
stalled and easily operated construction.
These and other objects and'advantages of the
invention will more fully appear in the following
description made in connection with the accom
panying drawings, in which like reference char
acters refer to similar parts throughout the sev
eral views, and, in which:
Fig. l is a front view of a portion of a type
` casting machine having an embodiment of my
invention incorporated therein;
has been raised to its upper-most limit of move
ment the line delivery shaft lll rotates in a
counter-clockwise direction through a moderate
angle as the type matrices are removed from the
assembling elevator 8. When the line delivery shaft IIl has rotated in a counter-clockwise direc 10
tion through a suitable angle, the handle I I may
be released to permit the assembling elevator 8 to
drop responsive to the pull of gravity. The cam
roll shaft 9 rotates continuously while the ma
chine L is in use in such direction that the upper 15
side thereof, as viewed in Fig. l, moves rear
wardly; that is the shaft 9 rotates in a counter
clockwise direction when viewed from a direc
tion corresponding to. the direction from which
the machine L is viewed in Fig. 2. To partially 20
counterbalance the weight of the assembling ele
vator `8 a helical tension spring I5 is connected
between a lug I3b formed on the hub I3a of the
assembling elevator lever I3 and an anchoring
pin I6 mounted on a suitable portion of the
machine L. All of the above mentioned parts
of the machine L are constructed in accordance
with conventional practice.
In accordance with my invention I provide a
frame consisting of a plate I'i disposed in a
vertical plane parallel to the front of the machine
L and having a leftwardly projecting extension
I'Ia through which apertures I'Ib- are formed.
The frame plate I‘I is mounted on the machine L
in a suitable location by means of screws IB
Fig. 2 is a sectional view taken along the line ' passing through the apertures I'Ib and screw
threadedly anchored in suitable internally screw
2_2 of Fig. 1 as indicated by the arrows;
threaded apertured portions of the machine L.
Fig. 3 is a side View of my mechanism to en
Forwardly projecting members I9 and 20 are
larged scale and disposed as in Fig. 2;
formed on the plate Il and have journalled in
Fig. Il is a front view;
_
apertures therein an operating shaft 2l disposed
Fig. 5 is a side view of my mechanism as viewed
to the left of and >co-axiall'y of the cam-roll shaft
from a direction opposite that of Figs. 2 and 3;
9 of the machine L.
and
Electromagnetically controlled friction clutch
Fig. 6 is an electrical connection diagram of the
means is provided Vbetween the cam-roll shaft 9 45
control circuit of- my mechanism.
Referring to the drawings, an embodiment of and the operating shaft 2`I. For this purpose a
disk '22 formed of magnetic material is mounted
my invention is shown associated with a Linotype
type-casting machine L having a key vboard 1, a on the Vleft-hand end of the cam-_roll shaft 9 by
means of a hub 22a formed on the disk 22 and
vertically movable assembling elevator 8, a cam
roll shaft 9, and a line delivery shaft III. An securedon the shaft 'Sjby means 'of a set screw
assembling elevator lever handle II is mounted 22h. For .cooperation with the magnetic disk
22 an electromagnetic‘core 23 is provided on the
on an assembling elevator lever shaft I2, which
right-hand end of the operating shaft 2l. The
carries an assembling elevator lever I3 connected
to the assembling elevator 8 through a link I4. core 23 includes a pair of pole pieces 23a and 23h,
both disposed eccentrically relative to the axis of 55
55 The assembling ’elevator 8 in the conventional
2
-
'2,135,919
vthe sha'ftJZl andhaving free ends disposed close
ly adjacent the face of the disk 22.
An electro
magnetic winding is provided for the purpose‘of
magnetically energizing the pole pieces 23a‘and
232). This electromagnetic winding-"may'consist
of a coil 24'mounted on the pole piece'23b. Ob
viously energization of the coil 24K will mag
netically energize the pole pieces 23a and 23h.
The polepieces 23a and 23h willbe attracted
10 to the disk 22 andvthroughpurposely permitted
end play of the operating shaft 2| will shift-„into
engagement with and adhere tothe disk 22 so as
rying the slip-ring 432 is `i'n‘oun'teìl on 'the ¿shaft
2| between the projecting member 20 ¿and the
magnetic core 23. A generally .horizontally dis
posed plate 33 formed of insulating material is
disposed with its medial portion above the slip
ring 32. The rear end of the'plate 33 is swing
ably attached as by means of a hinge 33a to the
upper end of the plate. |1 so that the plate 33 of
insulating material is vertically shiftable rela
tive to the slip-ring 32. An electrical contact 10
element 34 is secured to the lower side of the
medial portion of the insulating plate 33 in such
Vposition as to rest upon the uppermost portion
duce transmission of rotary -mechanical power of the slip-ring 32 when the plate 33 is held
from the cam-roll shaft '9 to the operating downwardly by the force of gravity. The elec 15
shaft 2|.
'
trical contact element 34 is adapted to be con
Means operated by the operating shaft 2| is nected to one terminal of a suitable source of
provided for applying lifting effort >to the as
electrical energy, the other terminal of which
sembling elevator 8 and this elevator lifting may be connected to the plate |1. With such
20 mechanism may be constructed as follows: A connections it should be apparent that lifting 20
secondary shaft 25 disposed on an axis parallel the insulating plate 33 will cause de-energiza
`to and vertically spaced from the axis of the tion of the coil 24 and that the coil 24 may be
operating shaft 2| is provided. 'I'he secondary energized by permitting the plate 33 to be low
shaft 25 is journalled in suitable apertured pro
ered responsive to the pull of gravity.
25 jections 26 and 21 formed on the frame plate I1
Means is provided for normally maintaining 25
near the lower extremity thereof. A sprocket 28 the insulating plate 33 in a raised position there
is frictionally mounted on the operating shaft 2| of to maintain the coil 24 in de-energized condi
to'be in frictional engagement therewith to pro
and a sprocket 29 is mounted on the secondary
shaft 25. An endless sprocket chain 30 is
30 trained over the respective sprockets 28 and 29.
Obviously when the operating shaft 2| is driven
from the cam-roll shaft 9 the forwardmost run
of the chain 33 will move upwardly. A member
3| secured at its upper end to the assembling
35 elevator 8 is connected in its lower portion to the
tion.
For this purpose a bracket 35 is mounted
on and projects upwardly from the plate 33.
The upper end 35a of the bracket 35 projects 30
forwardly to constitute a stop element. A mod
erate distance below the shaft 2| a forwardly
projecting bracket 36 is formed on the plate |1.
A generally vertically extending dog 31 is piv
tending downwardly from the assembling ele
otally connected at its lower end to the free end 35
of the arm 36 so that the dog 31 is swingable
forwardly and> rearwardly. The upper end of
the dog 31 is adapted to engage a lower side of
vator 8, as shown in Fig. 2, to a level below the
the stop element 35a when the insulating plate
forward or upwardly movable run of the chain
30. The member 3| may consist of a bar ex
40 lower sprocket 29, then extending rearwardly,
then extending upwardly to a point somewhat
above the lower sprocket 29, and then extending
rearwardly. The last mentioned rearwardly ex
tending portion 3|a of the member 3| may be
formed into an element adapted to be engaged
in one of the open spaces of the chain 30, as
indicated in Fig. 3. It should be apparent that
rotation of the operating shaft 2| by power de
livered thereto from the shaft 9 will result in
50 the assembling elevator 8 having lifting effort
applied thereto. When this lifting effort has
been lapplied for a sufficient length of time to
enable the assembling elevator 8 to reach its up
per limit of movement, the shaft 2| will be forced
55 to slip relative to the sprocket 28 but will main
tain a torsional force on the sprocket 28 so as to
hold the assembling elevator at its upper limit
of movement. If the electromagnetic coil 24 be
subsequently de-energized the above mentioned
60 torsional force will be removed and the assem
bling elevator 8 will descend responsive to the
pull of gravity and Vin descending will return the
chain 30 to its normal position.
Means is provided for transmitting electrical
65 energy to the coil 24 which, as previously point
ed out, rotates with the operating shaft 2|. For
this purpose an annular current collector or slip
ring 32 concentrically mounted on a wheel 32a
formed of electrical insulating material is pro
vided. The slip-ring 32 is connected to one end
of the coil 24, and the other end of the coil 24
33 is in its raised position so» as to maintain the
insulating plate 33 in its raised position. In
order to yieldably keep the dog 31 in engage
ment with the stop element 35a, a helical ten
sion spring 38, shown in Fig. 5, is connected be
tween the medial portion of the dog 31 and an 45
anchoring element 38a mounted on the insulat
ing plate 33 at a suitable point thereon. To
assist gravity in maintaining a downward force
on the insulating plate 33 a helical tension spring
39 is connectedv between the insulating plate 33
and the rigid arm 36 situated therebelow.
Remotely controllable means is provided for
shifting the dog 31 out of engagement with the
stop element 35a to permit downward movement
of the insulating plate .33 and consequent ener
gization of the coil 24. For this purpose a U
shaped magnetic core 40 is disposed at the side
of the dog 31 opposite the bracket 35 with the
pole faces of the core 40 facing the forward side
of the dog 31. The dog 31 is, of course, con
structedA of magnetic material. The core 40 is
secured to the forward end portion of the insu
lating plate 33. For energization of the core
40 an electromagnetic coil 24 is mounted on the
upper leg thereof. Obviously energization of the
coil 4| will result in the dog 31 being attracted
by the core 40 and pulled out of engagement with
the stop element 35a.
An electrical connection diagram of an electri
cal circuit for use in connection with the electro
magnetic coils 24 and 4| is shown in Fig. 6, A
is connected to the magnetic core 23 so as to
suitable source of electrical energy such as the
be grounded to the frame plate |1 through the
battery B is provided.
50
55
60
65
70
One terminal of the bat
operating shaft 2| and the members I9 in which . tery B may be connected to the frame plate |1 and
75 ,the shaft 2| is journalled. The wheel 32a car
will be connected therethrough to one end of the 75
2,135,919
winding of the coil 24. One end of the winding until such .time asthe electromagneticcoil 4I `is
of the coil 4I should also be connected by suitable ¿again energized.
' ` From the above lit is seen'that my mechanism is
means to the frame I'I. The ungrounded termi
nal of the battery B may be connected to one capable* of .utilizing mechanical power to raise the
terminal of a switch 42 which may be mounted, as assembling elevator 8 responsive to manipulation
shown in Figs. Vl and 2, in a suitable convenient
location adjacent the >keyboard 'I of the machine
L. The remaining terminal of the switch 42 is
connected to the contact element 34 carried by
the insulating plate 33 so that the coil 24 will be
energized by lowering of the plate 33 and de
energized responsive to the raising of the plate
33. The above mentioned remaining terminal of
the switch 42 may be connected to thevremaining
15 terminal of the coil 4I through a key switch 43,
which maybe mounted in a suitable convenient
location closely adjacent the keyboard as indi
cated in vFigsrl and 2. Momentary closure of
the key 43'by an operator of the machine L will
cause momentary energization of the coil 4I to
pull the dog 3l out of engagement with the stop
element 35a. The plate 33 will then drop to cause
energization of the coil 24 as previously described.
Energization of the coil 24 will cause establish
25 ment of a frictional driving connection between
the shaft 9 and the operating shaft 2| so as to
cause lifting effort to be applied to the assem
bling elevator 8, whereupon the assembling ele
vator 8 will rise.
When the assembling elevator
30 8 has reached its upper limit of movement, the
coil 24 will still be energized, and accordingly a
torsional force will be maintained on the sprocket
28 to hold the assembling elevator 8 at its upper
limit of movement.
35
Means is provided for causing de-energization
of the coil 24 when the line delivery shaft has
effected a suitable part of its counter-clockwise
angular displacement occurring responsive to the
assembling elevator reaching its upper limit of
40 movement.
An arm 44 is provided on the for
ward end of the line delivery shaft I0 and nor
mally projects therefrom to the right and some
of. an easily operated electrical switching key 43,
and rthat after application of lifting effort to the
-.assembling elevator has' been initiated by the key
l 43, such lifting effort is terminated automatically
in response to Aoperationof the type-casting ma :10
chine L~at a suitable >predetermined point in the
cycle of operation of the type-castingzmachine L.
Obviously zwith my mechanism placed in opera
tive association with a machine such as the ma
chine-L, the assembling elevator lever handle II T15
may be removed and hence the obstruction con
stituted by the handle I I may be eliminated.
It is apparent that I have invented a novel,
compact,and-eifective lifting mechanism for the
assembling elevator of a type-casting machine 120
`and'that my mechanism is adapted for easy and y
convenient electricall control thereof.
ïWhile my mechanism has been illustrated and
described. as applied to a particular type of type
caStingmachine, it should be apparent that the
mechanism is readily adapted for use in connec
tion with other types of type-casting machines
and also withmany machines other than type
casting machines.
It will, of course, be understood that various "30
changes may be kmade invthe’form, details, ar
rangementand proportionsl of the various parts
without departing from the scope of my inven
tion.
What is claimed is:
1. In combination witha> type-casting machine
having a vertically movable assembling elevator,
power-operated means for vertically moving said
elevator including, a rotatable operating shaft,
a rotatable body of magnetic material disposed
co-axially of »said shaft and adapted to be con
what downwardly. A vertically extending push
nected to a source of rotary mechanical power,
an electromagnet mounted on said operating
rod 45 has a screw threaded lower portion 45a,
»shaft closely adjacent said/body and adapted,
45 extending through a suitable aperture in the free
end portion -of the arm 44.
Adjusting nuts 46
are screw threadedly mounted on the lower por
tion 45a of the rod 45 respectively above and be
low the arm 44 so that upward movement of the
50 arm 44 will be transmitted to the rod 45 through
the upper one of the nuts 46. The upper portion
of the rod 45 extends through an apertured for
wardly disposed portion of the insulating plate
33.
Ata point normally somewhat below the
55 plate 33 an enlargement 45h is formed on the rod
45 to constitute a collar or plate engaging ele
ment. After the assembling elevator 8 has
reached its upper limit of movement certain op
erations of the machine L take place responsive
60 to the assembling elevator reaching its upper
limit of movement, and such operations of the
machine L are accompanied by counter-clockwise
rotation of the line delivery shaft I0 through a
moderate angle. Such movement of the line de
livery shaft Ii) causes lifting of the arm 44 and
the rod 45. As movement of the shaft I0 prog
resses the collar`45b comes into engagement with
the plate 33 and lifting of the plate 33 occurs as
a result of the further movement of the shaft I 0.
As the plate 33 reaches its raised position the dog
31, which has been engaged with the forward side
of the stop element 35a under pressure of ythe
spring 38, will be pulled by the spring'38 into en»
gagement with the lower side of the stop element
75 35a to maintain the plate 33 `in a raised position
whenV energized, to adhere to said body to fric
tionally connect the same to said shaft, mecha
nism driven by said operating shaft to apply lift
ing eifort to'said> elevator, an electrical contact
element connected to said electromagnet, a ver
tically movable member‘above said element, a l50
second~electrical Acontact element Ymounted on
said member and adapted for engagement with
said ñrstmentioned contact element to’there
-with comprise a switch, said switch being con
nected inseries with said electromagnet, releas
able Ameans normally supporting said member
in raised position lto maintain said switch open,
means manually actuatable to release said sup
porting means to effect closure of said switch,
and means operating responsive to movement of 60
said elevator tc raise said member vwhen said ma
-chine hasreached a- predetermined point in its
cycle of operation, said supporting means being
constructed to resume support of saidmember
when Vsaid member has. been placed in a raised 65
position thereof.
' 2; In combination witha type-casting machine
having a vertically `movable assembling elevator,
power-operated means for moving lsaid elevator
including, a` rotatable operating shaft, an .elec
tromagnetic clutch associated with said shaft and
adapted Vfor frictionally connecting the same .t0
a source of rotarymechanical power, mechanism
driven by said operating shaft to apply :lifting
effort to -said elevator, 1an:annular.electric cur 75
14
y2,135,919 -
rent collector insulatedly mounted on said oper
ating shaft and electrically connected to said
electromagnetic clutch, a vertically' movable
member above said collector, an electrical con
tact element carried by said member and adapt
ed for engagement withsaid collector and con
having a vertically movable assembling eleva
tor, power-operated means for moving said ele
nection to a source of electrical energy, releas
mission of mechanical power therebetween, mech
able means normally retaining said member in
raised position to maintain said contact element
10 out of engagement with said collector, manually
actuatablemeans for releasing said retaining
means to permit dropping of said member, and
means operating responsive to movement of said
elevator to raise said member when said machine
15 has reached a predetermined point in its cycle
vator including, a rotatable operating shaft, an
electromagnetic clutch associated with said shaft
and adapted for frictionally connecting the same
to a source of rotary mechanical power for trans
anism driven by said operating shaft to apply
lifting effort to said elevator, electrical switch
ing means adapted for use in controlling ener
gization of said electromagnetic clutch, a verti
cally
shiftable
member
for
controlling
said Y
switching means and arranged to be lowered'and
raised to respectively close and open said switch
ing means, releasable means normally holding
said member in its raised position, manually re
of operation, said retaining means being con
structed to resume its retaining position when
said member has reached ar-aised position thereof.
3. In combination with a type-casting machine
20 having a vertically movable assembling elevator,
power-operated means for vertically moving said
elevator including a rotatable operating shaft,
ka rotatable body of magnetic material disposed
co-aXially of said shaft and adapted to be con
leasing said holding means to permit dropping of
said member, and `mechanism operated in re
sponse to movement of said elevator to raise said 20
member when said machine has reached a prede
termined point Yin its cycle of operation, said
holding means being constructed to resume its
holding condition when said member has reached
25 nected to a source of rotary mechanical power,
its raised position.
an electromagnet mounted on said operating
6. In combination with a type-casting machine
shaft closely adjacent said body and adapted,
when energized, to adhere to said body to fric
having a vertically movable assembling elevator,
power-operated means for moving said elevator
tionally connect the same ‘to said shaft, mecha
including, a rotatable operating shaft, an elec
tromagnetic clutch associated with said shaft
and adapted for frictionally connecting the same
30 nism driven by said operating shaft to apply lift
ing effort to said elevator, an annular electric cur
rent collector insulatedly mounted on said oper
‘ ating shaft and connected to said electroma-gnet,
a vertically movable member above said collec
35 tor, an electrical contact element carried by said
to a source of rotary mechanical power for trans
mission of mechanical power therebetween, mech
anism driven by said operating shaft to apply
lifting effort to said elevator, electrical switch- ' r
member and adapted for engagement with said
ing means adapted for use in controlling ener
collector and to be connected to a source of elec
trical energy, releasable means normally retain
gization of said electromagnetic clutch, a verti
cally shiftable member for operating said switch
ing means arranged to close and open said switch
ing said member in raised position to prevent en
gagement of said element with said collector,
manually actuatable means for releasing said re
taining means to permit dropping of said mem
ber, and means operating responsive to move
ment of said elevator to raise said member when
45 said machine has reached a predetermined point
in its cycle of operation, said retaining means
being constructed to resume a retaining position
thereof when said member has reached a raised
position thereof.
50
mote controlled electromagnetic means for re
4. In combination with a type-casting machine
having a vertically movable assembling elevator,
power operated means for moving said elevator
including, a rotatable operating shaft, an electro
magnetic clutch associated with said shaft and
adapted to frictionally connect the same to a
55
source of rotary mechanical power for transmis
sion of mechanical power therebetween, mecha
ing means when respectively lowered and raised, .
a stop element on said member, a dog normally
engaging said stop element to hold said member
in its raised position, electromagnetic means for
shifting said dog out of engagement with said
stop element to permit dropping of said member,
manually controllable means for electrically ener
gizing said electromagnetic means, mechanism
operated in response to movement of said elevator
to raise said member when said machine has
reached a predetermined point in its cycle of op
eration, and resilient means urging said dog to
ward its position of engagement with said stop
element.’
.
7. In combination with a type-casting machine
having a vertically movable assembling elevator,
power-operated means for'moving said elevator
including, a rotatable operating shaft, Va clutch
associated with said shaft and adapted for fric
nism driven by said operating shaft to apply lift
ing effort to said elevator, electrical switching
60 means adapted for use in controlling energiza
tion of said electromagnetic clutch, a vertically
shiftablemember for controlling said switching
means and arranged to be respectively lowered
chanical power therebetween, manually controlla
ble means for effecting engagement of said clutch,
a sprocket on said operating shaft,a sprocket chain
and raised -to close and open said switching
trained over said sprocket, means connecting said
65 means, releasable means normally holding said
elevator to said chain for raising of said elevator
responsive to engagement of said clutch, and
mechanism operating responsive to upward
movement of said elevator for effecting disengage
member in its raised position, manually actuat
able means for releasing said holding means to
permit dropping of said member, and means op
erating responsive to movement of said elevator
70 to raise said member when said machine has
reached a predetermined point in its cycle of op
eration, said holding means being constructed to
resume its holding condition when said member
has reached its raised position.
75 ~ ¿5. In combination with a type-casting machine
tionally connecting the same to a source of ro
taryvmechanical power for transmission of me
ment of said clutch when said machine has
reached a predetermined point in its cycle of op 70
l eration.
8. Incombination with a type-casting machine
having a vertically movable assembling elevator,
power-operated means for moving said elevator
including, a rotatable operating shaft, a clutch 75
2,135,919
associated with said shaft and adapted for fric
tionally connecting the same to a source of rotary
mechanical power for transmission of mechani
cal power therebetween, manually controllable
means for effecting engagement of said clutch, a
sprocket on said operating shaft, a second sprocket
arranged to rotate about an axis parallel to and
vertically spaced from said operating shaft, an
endless sprocket chain trained over said sprock
ets, means connecting said elevator to the run of
said chain which rises responsive to engagement
of said clutch, and mechanism operating respon
sive to upward movement of said elevator for ef
fecting disengagement of said clutch when said
15 machine has reached a predetermined point in its
cycle of operation.
9. In combination With a keyboard-operated
type-casting machine having a vertically movable
assembling elevator, a line delivery rock shaft,
and a continuously rotating cam-roll shaft, elec
trically controllable means for vertically moving
said elevator including, an operating shaft rotat
ably supported in axial alignment with said roll
5
element being extended through said aperture,
and an element formed on said elongated ele
ment at a point normally spaced below said mem
ber and adapted to engage and lift said member
to disengage said contact element from said slip
ring and enable engagement of said dog with said
stop after said elevator has reached the upper
limit of the desired range of movement thereof
whereupon said elevator may descend in response
to the pull of gravity.
10. In combination with a type-casting ma
chine having an assembling elevator vertically
movable between limits, power-operated means
for lifting said elevator including, normally in
operative apparatus for applying lifting eiîort to 15
said elevator, manually controllable means for
rendering said apparatus operative, frictional
means interposed in said apparatus to slip and
yet maintain lifting effort on said elevator after
the same has reached its upper limit of move 20
ment, and mechanism operating responsive to
reaching by said elevator of said upper limit to
shaft, a body of magnetic material mounted on
render said apparatus inoperative when said ma
chine has reached a predetermined point in its
the end of said roll shaft adjoining said operating
cycle of operation subsequent by a predetermined 25
shaft, an electromagnet mounted on said operat
length of time to reaching by said elevator of said
upper limit.
11. In combination with a type-casting ma
ing shaft closely adjacent to said body and adapt
ed, when energized, to adhere to said body for
frictional transmission of rotary power from said
chine having an assembling elevator vertically
roll shaft to said operating shaft, a sprocket on movable between limits, power-operated means
said operating shaft and a second sprocket there
for lifting said elevator including, means for ap
below mounted for rotation about an axis parallel plying lifting effort to said elevator, a rotary ele
thereto, an endless sprocket chain trained over _ ment connected to said means for driving the
said sprockets and having one run thereof con
same in a lifting operation thereof, means for
nected to said elevator for raising the same re
rotating said element renderable operative man
sponsive to rotation of said operating shaft, a ually, frictional means interposed between said
slip-ring insulatedly mounted on said operating shaft and said lifting means to slip and yet main
shaft and electrically connected to said electro
tain lifting effort on said elevator after the same
magnet, a vertically movable member above said has reached its upper limit of movement, and
40 slip-ring, an electrical contact element on said means operating automatically to render said r0
member adapted for engagement With said slip
tating means inoperative responsive to and at a
ring, a source of electrical energy for said elec
predetermined length of time after reaching by
tromagnet connected to said element, a stop ele
said elevator of its upper limit of movement.
ment on said member, a spring-pressed dog nor
12. In combination with a type-casting ma
mally engaging said stop to hold said contact ele
chine having an assembling elevator vertically
ment out of engagement with said slip-ring, elec
movable between limits and the usual line deliv
tromagnetic means for shifting said dog out of
engagement with said stop element to permit en
gagement of said contact element with said slip
ring to energize said electromagnet, manually op
eratable means for energizing said electromag
netic means, a generally horizontally projecting
arm on said rock shaft arranged to swing up
wardly responsive to rocking of said rock shaft in
55 response to upward movement of said elevator,
a vertically extending elongated element swing
ably connected at its lower end to the free end of
said arm, said member having an aperture there
through and the upper portion of said elongated
30
35
40
45
ery shaft, power-operated means for lifting said
elevator including, means for applying lifting ef
fort to said elevator, a rotary element connected
to said means for driving the same in a lifting 50
operation thereof, means for rotating said ele
ment renderable operative manually, and means
connected to said line delivery shaft to be oper
ated responsive to rotation thereof to render said
rotating means inoperative at a predetermined 55
time after said elevator has reached its upper
limit of movement.
RALPH V. STREETER.
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