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Патент USA US2411449

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N0v.» 19, 1946.
2,41 1,449
Filed Dec. 5, 194s"
Rober-z" _E Mc ¿can
A ttor-neg
Patented Nov. 19¿, 1946
Application December 3, 1943, Serial No. 512,794
5 Claims. (Cl. 30---9)
This invention relates generally to the class
of cutlery and more particularly relates to im
plements designed for the opening of sealed me
tallic receptacles, such as tin cans and the like,`
the present application being based upon and
setting forth certain novel improvements over
the structures disclosed in my prior Patents No.
2,287,442 of June 23, 1942, No. 2,294,507 of Sep
tember 1, 1942, and 2,314,506 of March 23, 1943.
An object of the present invention is to provide 10
the accompanying drawing, it being understood,
however, that the invention is not to be consid
ered as limited by the specific illustration or de
scription but that minor changes and modifica
tions may be made therein` so long as such
changes and modifications are within the scope
and improved escapement mechanism between
of the appended claims.
In the drawing:
Fig. l is a view in side elevation of the right
hand side of an embodiment of the escapement
mechanism which is adapted to be used in asso
ciation with any one of the several forms of
_rotary drive wheel can opener structures in my
an operating crank and a thrust element actu
prior patents hereinbeiore referred to.
in a can opener of the type employing a rotary
can driving wheel as herein disclosed, a novel
ating arm wherein such escapement is effected 15
Fig. 2 is a View in front elevation of the
more quickly and smoothly and with the vex
mechanism of Fig. V1.
penditure of less >force or effort ,than is possible
Fig.3 is a view in elevation of the right-hand
with the escapement mechanisms disclosed in
s_ide of- another embodiment of the escapement,
the prior patents referred to.
parts being broken away. » >
The rotary can openers of the stated prior 20
Fig. 4 _is a view in `front elevation of
patents and of the present application employ~ , mechanism shown in_Figure 3.
in association with a cutter and a can -rim en
Fig. 5 is a view in elevation of the right-hand
~`gaging and driving wheel which >is Vrotated by
' iside of a further embodiment of the escapement, '
means of a suitable type of- crank, a thrust
`portions being broken away.
means for eiiecting relative movement between 25
Fig. 6 is a view in front elevation of the ein-'- i
the cutter and the driving wheel, with mecha
bodiment shown in Fig. 5.
. nism for cooperatively coupling the crank means "
4Figure 7 nis a view in irontV elevation of one
l with the means for effecting the stated »relative
form Vof my rotary drive wheel type can opener,
movement between the wheeland- cutter, when > `showing the -.application offthe escapement shown
’ ‘theœrank‘ is turned in a- desired direction, iso .as
Yto effect shifting ,of the cantowards the -cutter
to bring about penetration of the canrhead lby
V,iinïîlï‘igures `l and V2.
Referringfnow more particularly tothe draw-_
ing, Figures'l and 2 'illustrate one embodiment
`the cutter andthe cutting away of the head or
of the improved escapement which is designed
-the shifting of the can away from the cutter »
to be used in `association with any of the several
after such head has been cut away.
, 35 designs vof can openers shown vin my prior lpat-_
The operative coupling" established between
the crank means andthe said'movement eiîect
ing means is intermittently, operated upon tum-_
ing of the crank and in the present case certain
., embodiments'of an improved and novel escape
`ment mechanism are shown whereby'> the desired _
coupling of the handle with the .means for pro
ducing the stated relative movement between -
ents previously referred to.
I_t is contemplatedto use any ofthe various
embodiments of the escapement with any of the
different -forms of top `construction illustrated in
.my prior 4Patents 2,287,442; 2,294,507 and
In Figures 1 and 7 the reference numeral Ic
-indicates an elongated body plate which is se
the wheel and cutter, is'accomplished until the
limit of suchmovement is reached, because of
cured to a supporting member 2, which is de-,
signed to be attached to a suitable lwall bracket,
the improved construction, the coupling will be
' not shown,`so as to dispose the body vplate in up
automatically released or disengaged with a mini
right position‘when set up for use.
mum of eiîort to permit continued free move-A Ä
A type of wall bracket designed particularly
ment of the crank for the operation of the driv
for use in association with my several forms
ing wheel.
50 of can opener, is illustrated in my pending appli
Other objects and advantages of the invention
cation Serial No. 484,626.
will become apparent as the description of the
At its upper end the body plate Ic is shaped
same proceeds and the’invention will be 'best
’to provide theI laterally oiîset shoulder 3 which
understood from a consideration of the follow
extends across the left-hand side‘of the plate
ing detailed description taken in connection with 55 and above this shoulder the body plate is shapec’`
stud and slightly forwardly therefrom, when the
to provide a head 4 which comprises the inclined
arm 20c is hanging vertically as shown, is a
side wall 5, the laterally extending top 6 and the
trip stud 10 which ‘is carried by the body Ic.
depending spring arm l. which is in spaced op
Adjacent the rear of the rearwardly extend
posed relation to the wall 5. The wall 5 and
portion 88 of the arm 20c is fixed the in
the arm l have alined bearing openings 8 and 9
wardly extending pivot 1| upon which is pivot
through which is extended a bearing sleeve l0
ally mounted the trigger link 12 which, when
which is held against rotation. Extending
arm 20c is vertical‘as shown, assumes a sub-y
through this sleeve is a cutter wheel shaft i2
horizontal position.
which carries the cutting wheel i4 and between
The forward end of the trigger link 12 carries
this cutting wheel and the adjacent wall 5 there. 10 a pivot
13, to one end o_f which is secured an end
ls supported, upon the shaft l2, the idler wheel
of the upwardly extending latch finger 14 the
i3, against which the edge of the rim of a can
upper end of which finger has its forward edge
C bears when being turned during the operation
notched or cut out as indicated at 15 to receive
of cutting out the head of the can.
corner of the keeper stud 69 which is of rec
The body plate has formed therein just below ll5 atangular
cross section as shown.
the shoulder 3, the elongated longitudinally ex
tending elliptical slot l5 in which is ñtted the
Integral with the forward end of the link 12
is the depending trigger 16 which extends below
circular collar it. This collar has turning move
the lower end edge of the arm 2te. The down
ment in the slot and also longitudinal movement
ward swinging of the link l2 and consequently
therein and it carries, and has extending there 20 the rearward swing of the trigger is limited by
through, the coupling sleeve il which, upon the
the stop @t of the arm flange. The latch oscil
side of the plate nearest the cutting wheel, passes
lates upon the pivot t3 and it will be readily
through and is secured to a thrust element, in
seen that upon clockwise rotation of the crank
the form of an eccentric wheel i8. The periph
handle to bring the trigger finger against the
ery of this eccentric wheel contacts the overly
rear edge of the trigger, the application of for
ing shoulder t.
ward pressure to the escapement mechanism
At its other end the coup 'ng sleeve il is se
carrying arm 2te, when the arm is in the hang
icured in the laterally offset upper end portion
ing position shown, will force the latch against
it oi’ an escapement carrying arm 2te, herein
after more speciñcally described.
30 the immovable stud 'ld and thus cause the upper
end of the latch to slip out of contact with the
keeper stud t@ thereby allowing the trigger 16
Disposed across the side of the body plate ic
)directly beneath the eccentric wheel |8 and hav
ing contact with the lower peripheral portion
to swing in a clock-wise direction a sumcient
distance to escape from the trigger ñnger car
thereof, is a yleldable arm 2| which forms an
rled by the handle. Upon reverse movement of
integral continuation of a relatively wide lower 35 the handle the trigger finger will engage the
or underlying portion 22 which is in the form
forward edge of the trigger 16 and swing the
of a plate secured between the body |c and the
arm 20c in a counter-clockwise direction so as
supporting member 2.
to release a can held between the driving wheel
The coupling sleeve l1, which joins together
and the cutter wheel and at the same time due
the plate ofthe escapement unit, the sliding 4:0 to the downward swinging of the trigger link
collar l5 and the eccentric wheel ì I8 forms a
l2 the latch finger 14 will move to a position
where it may again receive the adjacent corner
of the keeper stud 69 in the notch 15.
Figures 3 to 6 inclusive illustrate the embodi
ments of the escapement wherein the latch ele
ment is pivotally attached to the arm and has
bearing for a shaft 23. This shaft extends at
one end beyond the eccentric wheel and carries
a milled edge driving wheel 2li which is disposed
directly below the idler wheel I3 and, when in
raised or operative position, has its top edge in
overlapping relation with the lowermost portion
a detachable coupling with the trigger rather>
of the cutting edge of the wheel i4, upon the
than being pivotally connected to the trigger as
inner side of such wheel, whereby to eiîect the
illustrated in Figure 1. In Figures 3 and 4 the
turning of the can C, through the engagement 50 .body
plate is designated lg and the arm is desig
>of the top flange or rim ofthe can between the `
nated 20d. Upon the body lg adjacent the for
wheel 24 and the idler i3. The head of the can
ward edge is the stop pin |45. The arm 20d
which is punctured by the edge of the cutting
carries a pivot pin |41 upon which is pivotally
wheel, may then be cut out by rotating thecan
mounted, between the arm and the body lplate
through the rotation of the'driving ,wheel 2li,Y
ig, the hanging 'latch finger |48 which extends
Y with respect to the cutter wheel.
The shaft 23 extends a substantial distance to
the right of the body lc, where it has secured
to its right hand end, the operating crank han
dle 25, the upper end of which handle is main
tained in the desired spaced relation with respect
to the upper end portion of the escapement unit
plate 20c, by a spacing sleeve 26 which may ex
tend through the couplingrsleeve |1.
‘belowthe stop |46 as shown. The lower end of
this arm is notched at its forward edge as indi
cated at |49 and the arm- is normally urged to
60 Aswing forwardly by a suitable spring such as
that indicated at |50, the spring being mounted
upon the arm 20d.
At the lower end of the arm 20d and rear
wardly from the latch finger |48 is the pivot pin
As vpreviously stated the upper end portion 65 |5| upon which is pivotally mounted an end of
a. forwardly extending link |52 which is in
_ of the escapement arm 20c is offset, thereby
providing the shoulder 21 which is perpendicular '
to the length of the arm and the body of the
arm below this shoulder is widened to have the
rearwardly extending portion 66 which is bor 70
dered by the inwardly extending flange 61 which
passes part way across the lower edge of the
wardly offset and provided at its forward end
with the transverse terminal lip |53 the upper
.edge of which is designed for'engagement in the
notch |49 at the lower end of the latch finger.
This link |52 carries, adjacent its Vforward end,
the depending trigger |54, which extends below
arm-forming the forwardly facing stop edge 68.
In this escapement the arm plate carries an in
the lower edge of the arm 20d as shown to be
wardly extending keeper stud 69 and below @his 75
dle of the cutter.
engaged by the trigger ñnger carried by the han
2,41 1,449*
The stop pin ,|55 >lies upon the inner side o!
the arm 20d' above the link |52 and limits the
upward swinging of this link and the trigger |54.
In the embodiment shown in Flguresô and 6
the body plate is'designated Ih and the arm car
rying the esoapement mechanism is designated
‘ 20e.
The trip pin for the latch linger is indi
cated at |48a, being supported upon the body
thrust means to actuate> the thrust means, a
trigger comprising a» relatively long body dis
posed adjacent to thearm to‘extend transversely
thereof and having an end pivoted to the arm
at one side of the longitudinal center of the arm.
lthe trigger oscillating vertically on the arm, means
carried by the crank for connection with the
trigger for effecting movement of the arm and
as in the preceding construction while the pivot
for the latch iinger is indicated as Illa and is 10 crank together as a unit through a predeter
in a circular path, a, relatively long
supported upon the ann 20e and suspends the
iinger extending longitudinally of the arm upon
latch linger |48a upon the inner side of the arm
the opposite side of said center from the trigger
as shown.
pivot and movably supported for connection with
The forward edge of_ the arm 20e vat the lower
end carries the inwardly turned stop :linger |5111. 15 the trigger to maintain the trigger in a position
transversely of the arm whereby to maintain
LA corresponding stop finger |51 is integral with
between the trigger and the crank,
and extends inwardly `from the lowerl edge of the
and means acting after a. predetermined degree
arm 20d of the structure shown in Figure _4.
of unitary movement voi' the trigger carrying arm
The trigger link, trigger and the latch linger
crank, to effect disconnection o1' the trigger
engaged part thereof are, in‘this construction, 20
from the crank carrying means, permitting con
formed of a single length of material, the link
tinued movement of the crank only. ,
portion being designated |52_a and being turned
‘at one end to forman eye |58 through which
3. In a rotary type can opener including a cut
` ter, a rotary can driving wheel movable relative
the pivot pin |5|a, carried by the lower end of
the arm, extends.v The trigger is designated |5Ia 25 to the cutter, a crank for turning the wheel'and
a thrust means for effecting relative movement
andmerges with the upwardly extending portion
between the wheel and the cutter; an oscillat
|59 which in turn merges with the horizontal
able arm operatively coupled with said thrust
forwardly projecting ear o-r tip |60 which engages
to actuate the thrust means, a relatively4
across the stop |51a to limit the downward swing
ing movement of this unit. 'I'he corner formed 30 short trigger member having a greater length
than width, pìvotally attached at one end to the
between the parts |59 and |60 engages in the
arm and extending transversely thereof, said
notch llaa at the lower end of the trigger finger.
trigger having a portion extended below the arm,
'I'he spring element |50a engages the latch finger
means carried by the crank for connection with
and normally urges it forwardly so that a. secure
connection will be maintained between the ñnger 35 said extended portion for effecting movement of
and the trigger.
the arm and crank together as a' unit through
a predetermined extent in a circular path, a rela
It is believed that the operation of the escape
tively long shiftable member pìvotally attached
ments shown in Figures 3 to 6 inclusive will be
to the other end of the trigger and extending
readily apparent in the light of the description
given in connection with the preceding embodi 40 lengthwise of the arm in line with but away from
said trigger portion, an lelement carried by the
ment of the escapement.
arm and adapted to be engaged by the other end
of the shiftable member for holding the shiftable
1. A rotary type can opener comprising a body,
a cutter carried by the body, a Vrotary can driv
ing Wheel supported on the body for movement
relative _to the cutter, a crank for turning the
wheel, a thrust- means for effecting relative move
ment between the wheel and cutter, an arm con
nected with said thrust means for oscillatorymovement around the axis of turning for the 50
crank, a trigger link carried by and extending
substantially transversely of the outer end of the
arm, a trigger carried by the link and extending
radially beyond the outer end of the arm, a latch
iinger pìvotally attached at one end to said link 55
and extending substantially longitudinally of the
member against movement longitudinally of the
arm and securing the trigger member against os
cillation, and a fixed means disposed in the path
of movement of the shiftable >member to be en
gaged by the said shiftable member after a pre
determined degree of unitary movement of the
trigger carrying arm and crank, to eiîect the
shifting of the shiftable member andv release oi'
the trigger member from the crank to _permit
continued movement of the crank only.
4. In a rotary type can opener including a cut
ter, a rotary can driving wheel movable relative
to the cutter, a crank for turning the wheel and
a thrust means for effecting relative movement
arm, a. keeper member carried by thev arm and
between the wheel and the cutter; an oscillat
adapted for operativel connection with the free
able arm operatively coupled with said thrust
end ‘of said latch ñnger for opposing oscillation
of the trigger link, a trip member carried by 60 means to actuate the thrust means, a shiftable
trigger, said trigger having a length extending
the body in the path of movemen't o-f said latch
transversely of the arm and pìvotally attached at
linger for effecting shifting of the latch iinger
one end to the arm, the trigger at the other end
from connection with the keeper, and means car
being formed to provide a lateral shoulder,l a
ried by the crank for engagement -with the trig
relatively long member pìvotally attached at one
ger upon turning of the crank whereby rotation
end to the arm above said shoulder to lie length
of the arm and crank as a unit is eii'ected, said
wise of the arm in line with said shoulder, said
trigger being released from the crank carried
member at itsfree end engaging over said shoul»
means upon disengagement of the latch iinger
from said keeper.
der to maintain the trigger against vertical 0s
cillation, and a ñxed member lying in the path of
2. In a rotary type can opener including a
movement of said long member to engage and
cutter, a rotary can driving wheel movable rela
shift the latter out of connection with said shoul
tive to the cutter, a crank for turning the Wheel
der, the trigger having a downwardly extending
and a thrust means for eiîecting relative move
portion, means carried by the crank for connec
ment between the wheel and the cutter; an os~
cillatable arm operatively coupled with said 75 tion with said downwardly extending portion for
effecting movement of the arm and the crank
2,411,449 `
together as- a unit through a predetermined ex
5. A rotary type can opener as set- forth in
claim 4, with a ñange element carried by the
arm and engaged by the shoulder forming means
of the trigger to limit the downward swinging
tent in a. circular path, said fixed member acting
.to shift the said long member after a predeter
mined degree of unitary movement of the trigger 5 movement of the trigger member.
carrying arm and crank to effect disconnection
or the trigger from the crank carrying means.
permitting continued movement of the crank only.
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