N0v.» 19, 1946. R, E, MCLEAN 2,41 1,449 ROTARY TYPE CAN OPENER Filed Dec. 5, 194s" Hul/i _ INVENTOR. Rober-z" _E Mc ¿can I A ttor-neg Patented Nov. 19¿, 1946 2,411,449 UNITED STATES` PATENT OFFICE Application December 3, 1943, Serial No. 512,794 5 Claims. (Cl. 30---9) 2 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. ~ g 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 the-' 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 2,314,506. ` > ' _ - - , 4 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’` 2,411,449 p 4 . . 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 lng 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 the arm 20c is vertical‘as shown, assumes a sub-y through this sleeve is a cutter wheel shaft i2 stantially 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 6 . 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. 4 » y l 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 connection 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 and 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 means 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 Iclaim: , _ 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 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 ` .8 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. ROBERT permitting continued movement of the crank only. E. _McLEAN.