Sept 24, 1946. R. K. GRAY ET'AL ' > /,_§§ PADLOCK Filed May 24, 1944 , ,0 , 5, ¢ ' M ', I . ' - 2 Sheets-Sheet l 20 I a 2,408,137 -_ 24,1946; ' ' R. K. GRAY ETAL‘ ’ ' ' ' 2,408,137 PADLOCK Filed May 24, 1944' I‘ ' 2 Sheets-Sheet 2 ~ '1/66'MQ'Zé'9 4 > A 7 . ‘ var ‘ , Patentecl Sept. 24, 1946 2,408,137 UNITEDV'STATES PATENT OFFICE PADLOCK Raymond K. Gray and Rollin Lester Gray, Chi cago, IlL, assignors to The Illinois Lock _Com pany, Chicago, 111., a corporation of Illinois Application May 24, 1944, Serial No. 537,114 , 6 Claims. 1 . . (01. 70-39 2 This invention relates to a key-operated pad lock of the typewhich utilizes a shackle slidable vided with facing notches e at opposite points inwardly and outwardly relative to the padlock body, and is concerned primarily with a mounting be engaged by the locking devices presently to be described, and the long arm, below its notch for the various working parts whereby to assure a dependable and satisfactory operation thereof over a long period of service, and a facile assem bly of such parts upon the mounting preliminary to insertion thereof as a unit into the lock body for securement therein. In general, the padlock. is of the dual locking type employing a' pair of meshing gears movable concurrently into and out and along its side which faces the other arm, is formed with a flat 1‘. In its lower region the long arm is provided with a tapered section l5 which joins with an extension l6, of reduced diameter whereon is built out an annular head I'l. Between this head and the body shoulder l2 therebelow is positioned a coiled compression spring [8 into which the arm extension [6 is ?tted, a constant of engagement with the shackle arms, an exam thrust force being thereby maintained axially of not far from the end of the short arm, each to the long arm of the shackle such as to displace ple whereof is set forth in the application of Henry J. Dequick ?led February 8, 1943, under 15 the shackle outwardly of the padlock body, when ever conditions will permit. v Serial No. 475,116, now Patent No. 2,374,669, dated The working parts are carried by a mounting May 1, 1945. The features of our invention, how: ever, relate more particularly to details of im M which, together therewith, are adapted to be provement, particularly the mounting for the ' inserted as a unit into the body chamber for working parts whereby to facilitate and speed 20 securement therein. When so ?tted and secured in place, a closure is provided for the chamber the assembly thereof, all as hereinafter setforth and described. ' ~ ' open end whereby the locking mechanism to the interior thereof isv e?ectively protected. This An exempli?cation of the present padlock in mounting, as shown, is formed with an enlarged vention vis illustrated in the accompanying draw ings wherein Figure 1 is a view of the padlock 25 base 20 of a size to ?t within the chamber recess 01, the end of the base at one end being provided with a flange 2| which underlies the body shoul der l2. Rising from the base is a main column or post 22 with walls 23 extending toward the Fig. 2; Fig. 4 is a perspective View of the mount end whereon is the ?ange 2|, the walls, de?ning between them an elongated half round surface g ing per se, looking down upon the top and toward whichis adapted to face a similarly rounded sur one end thereof; Fig. 5 is a similar view of the face h in the body Wall to provide therebetween mounting, looking toward its opposite end; Fig. 6 a cylindrical chamber for accommodation of the is a view in perspective of (a) the locking gears, shackle long arm I0. Between the post walls 23 (b) the transmission and mounting therefor, and (c) the cylinder plug, in axial alignment ready at the bottom thereof is a ?oor 24 which is ?ush with the shelf I2 to cooperate therewith in pro for assembly into an operating unit; and Figs. '7, viding for the shackle arm, chamber a bottom 8 and 9 are transverse sections all in the plane in perspective, looking toward its bottom end; Fig. 2 is a vertical sectional view, taken through a plane centrally of its longer dimension; Fig. 3 is a transverse section, taken on line 3-3 of closure against which the compression spring l8 of line 8-.-8 of Fig. 2, showing, respectively, the ‘positions of the parts as when ,(a), assembly 40 may be rested at one end. A drain opening 2' may thereof upon the mounting is about to take place, be formed through the bottom closure, as shown. (1)) assembly is completed and the parts are oper The mounting column at its end opposite the ated to their locking positions,‘ and (c) assembly walls 23 is formed with an elongated arcuate , is completed and the parts have been operated channel 7' provided by a curving surface bounded to their unlocking positions. } by vertical shoulders 30 and 30a beyond which As shown, we utilize a hollow body A provided is extended a pair of arcuate walls '3! and 32, with a large chamber 0 open onlyat the bottom, both concentric with the curving surface of the and at the top by two openings a and I) through arcuate channel 7', but of lesser radius, to de?ne between them a partial cylindrical enclosure of which may be extended the long and short arms [0 and II, respectively, of a shackle S.‘ The something more than 180°. ' The base end adja— chamber is further recessed, at (1, adjacent its cent these arcuate walls is curved concentrically bottom except'at the end opposite the shackle therewith as at 33, but with‘ aslightlygreater long arm where we have provided a shoulder l2 radius, so as to provide a complete enclosing wall for a circular opening 34 through the mounting slightly spaced from the bottom end of the pad lock body. The two arms ‘of the shackle are pro- 55 base 20. In the plane of offset, where the arcu 2,408,137 ate walls 3! and 32 join with the circular base wall 33 of greater radius to enclose the opening 34, we provide an elongated arcuate notch k op posite to and complementary with the arcuate channel 7‘, and commencing with one end of this notch the arcuate wall 3| is formed along its bot tom with a recess which continues to a depend ing lug 35. In addition, we provide upon the in ner surface of both arcuate walls 3i and 32 at opposite points intermediately of their ends, ar cuate channels m each extended in a plane which is transverse to the axis of the cylindrical en closure therebetween. In the wall 32 there is also provided on its inner surface and extend ing down from the top, an arcuate recess 11 bordered by side and bottom shoulders 36 and 31, respectively (see Fig. 5). The top .of the col 4 tended into the tumbler channel 1). In this posi tion they may be reached by a slender tool (not shown) which is inserted into the channel from its inner end when exposed by displacement of the shackle short arm I I; such a tool whose act ing end is appropriately formed for the purpose may then be manipulated to draw the hooked ex tremities together thereby contracting the ring to disengage its curved ends from the arcuate channels m, whereupon the cylinder plug is freed for axial removal from its mounting.‘ The plug which is adapted for limited oscilla tory movements in response to operation of a proper‘key, is releasably connected to a transmis sion T whereby to move certain elements into and out of locking position relative to the shackle S. This transmission may comprise a cylindrical umn 22 carries an upstanding cylindrical boss 33. The mounting, as herein disclosed, may be cast or otherwise formed in a single piece, and it body 54 formed at one end with an axial socket (not shown) for accommodation of the cylindri cal boss 45 which projects axially from the plug end wall 44, an arcuate wing 55, of perhaps 180° serves to carry all the operating parts of'the lock in length, being extended laterally from this body save only the shackle and its spring. It may ac adjacentiits end which is proximate to the plug. cordingly be ?tted with most of the parts it is to This wing which is disposed. within the same carry preliminary to insertion into the body chambenand when positioned and secured there 25 plane as the arcuate shoulder 46 upon the plug end wall, cooperates therewith to limit relative in an operative-relationship with the shackle is rotary movement between the plug and trans assured. When so positioned a complete closure mission body to about ‘90°. Coiled around the for the body chamber at its bottom may be pro transmission body is a spring 56 having one end vided permanently, as by interlocking the lower edge of the body with the mounting base by the 30 5‘? turned to engage an end of the wing 55 and its other end 58 outturnedto engage the shoulder Bil well known process of knurling or crimping. adjacent the channel 1' (see Fig. 2), thereby ex Referring now to Figs. 6-9, the locking parts erting its tension force to rotate the transmission are shown as comprising a cylinder plug P hav~ to a position where a lug 59, which is extended ing at one end a circular base 11! adapted to be seated within the circular opening 34 to provide 35 laterally from a head 69 on the body 54 to lie within the recess n, is urged toward the shoul a complete closure therefor. Through the plug der 36. base is a central opening 0 for a key“ to operate Extending axially beyond the body head 60 is tumblers 43 which are adapted for opposite move a boss 6| having a reduced end 62 formed with ments inwardly and outwardly to enter and va opposite ?at sides 63 for operative connection catethe arcuate channel 7' and also a second ar with a driving gear X wherein is a complemen cuate channel p which is provided interiorly cf tary axial opening 64. This gear is in mesh with the body chamber in register with the arcuate a comp-aniondriven gear Y wherein is an axial notch k. The plug which providesa mounting opening 65 for reception of the cylindrical boss for these tumblers is formed with a circular head 38 which projects from the end of the mounting end wall 44 from which is extended axially a' insert M. It will be observed that the driving cylindrical boss 45 to one side of which is an ar gear X is adapted for rotation about an axis cuate shoulder 46 approximately 90° in length. which is common also to the transmission and The plug base is cut away to provide upon its cylinder plug, whereas the driven gear Y is free upper or inner face an arcuate recess q extending to rotate about the axis of the boss 38; also the a distance of 90° or so between shoulders Ill’ and operative connection between each gear and its d8 which are adapted to alternately engage the mounting is freely releasable in response to an lug 35 when the plug is oscillated through its full axial movement of one part relative to the other. movement range. ' The two gears occupy planes the same as the Means are provided to releasably lock the plug notches e in the shackle arms, each gear being in its operative position in the cylindrical space formed with a heel 6B which is adapted to be between the arcuate walls 3! and 32. For this moved into and out of the notch in the proxi purpose we may employ a split spring ring 50 (see mate arm whereby to lock or free the shackle as Figs. 3 and 6) whose extremities are outwardly respects any movement toward or away from the and reversely turned, away from each other, to form a pair of spaced hooks 5|. The ring is of 60 padlock body. general oval contour with its shorter diameter ex In use, an operating key, inserted through the slot 0 in the plugbase, is engaged with the tum tending through the gap between its hooked ends, and its size is such as to straddle the plug head 44 blers so that, when turned, the tumblers are wherein is a peripheral groove 1' for normal re pulled in to clear the channels :i and p, the plug ception of certain portions of the ring, via, its two 65 then rotating with the key. Initially, before this movement starts, the shackle is locked by en extremities adjacent the hooks and its straight gagement of the two gear heels 66 within the or gently curved side opposite thereto. This notches e of its two arms (see Fig. 8); at the groove r lies opposite the arcuate channels m in the walls 3| and 32, permitting opposite curved conclusion of the plug turning movement, the ends of the ring, viz. those portions of minimum radius, to enter thereinto in response to the ten sion force normally exerted by the ring. When so disposed, the plug is locked against axial move ment while remaining free for rotation, the two hooked extremitiesof thespring being then ex 75 gear heels will have cleared these notches (see Fig. 9) so that the shackle is then free to be pushed outwardly by tension of the spring I 8 to the point where the head I‘! on its long arm [0 ‘comes to rest against the underside of the driven gear’Y. In this position, the short arm 2,408,137 > ' 5 l l7 is’clear of the padlock body, permitting the position the arcuate shoulder 46 is'required to move circularly ‘to a position between the two ends of l the transmission wing 55. Shortly be the axis of its long arm. vWhen ‘the shackle‘ ‘is swung, back again, to the position in which its - fore'reaching this position it is possible, by as two arms are aligned with the body'lopeningslal 5' turning movement of the plug, to engage one end of its shoulder 46 with an end of the wing 55 ' and b, it may be pushed inwardly for automatic shackle to execute a swingingmovement ‘about locking. At the start of this return inw'ard’move ment, the shackle long arm'tapered section [5. ‘ lies just above the heel v65 of the driven ' gear Y so that, when inward movement takesplace, whereby to rotate the transmission slightly, the plug also being moved to a position where its two shoulders“ 41 and 4B lie opposite the depend ’ ing lug 35 for alternate engagement therewith. The movement range of the plug, now operatively this section of the shackle arm will camithe gear connected with the transmission, starts at a point around to whatever extent is necessary to remove where the transmission lug 59 remains spaced interference to continued advance of the shackle from the shoulder 36 and ends when this lug against the tension of the compression spring l8. When this inward movement has continued to the 15 advances up against the shoulder 30. The split ring 50, which initially was compressed into the point that the two shackle notches e‘are opposite groove r to permit insertion of the plug through the gears, the overhanging upper shoulder formed its full movement, is free to expand into engage byythe notch’ e in the long armrl? will engage merit with the arcuate channels m when the plug the upper face of the driven gear Y, thereby acting as a limit stop, In this position, the two 20 is in \?nal axial position, whereupon the plug is locked against withdrawal except with the aid of gearsare free to rotate rbackqinto simultaneous a special tool as already set forth. In succeed engagement with the two notches 'e of theshackle ing operations of the lock the movement range which is therefore locked securely against further of the transmission will be determined by and coincident with that of the plug so that the gears Between the plug and transmission there ‘is will occupy either of the two positions indicated provision for a slip movement of 90° or so. ‘The in Figs. 8 and 9,»but none other. <_ range of plug oscillatory movement is determined It should be noted that the spring 56 exerts by two stops, viz., the-shoulders 41 and 48 which its force to return the transmission and plug are adapted to alternately engage opposite ends movement. . ‘ ' Y Y 5 of the depending lug 35. The spring 55 acting 30 to the initial position in which the gears are engaged with the shackle; that in the opposite or unlocking position the shackle is freed to in the rotative position wherein its, tumblers are spring outwardly a‘limited distance only; that projected into the channels a’. and p, the shoulder in this latter position the heel 650i the driven 1H3v then bearing against‘the lug 35. When, 170-, tated from this position by the operating key, the I gear is held with pressure laterally against the shackle long arm I?! whereby to‘impose a mod transmission turns with the plug to move the through the transmission normally holds the plug gears simultaneously to unlocking positions in erate} restraint'against free or wild swinging ' which the shackle is freed for outward movement movements of the shackle; that the driven gear, in cooperation With'the head I’! on the shackle in response to tension of the spring I8. " When this takes place, the spring 56acts to prevent the gears from returning to, locking positions ; (see. Fig. 9). The plug, however, is free to return to its initial position for withdrawal of the key. In long arm, provides a limit stop whereby separa tion of the shackle from the padlock body is pre vented; and that special provision is made for holding the two gears in an abnormal position, thus returning to its initial ‘position, the'plug I. for purposes of assembly, whereby to afford su?i moves independently of the transmission which ex ;UK cient clearance past the driven gear for insertion of the long shackle arm return movement of under tension of the spring 567rem'ains insits which is then prevented upon operative assembly advanced position. When the shackle is again of the cylinder plug in place. . ' ' pushed in, as per the description already given, Another feature of advantage is the large sin the spring, acting through the transmission, will operate to restore the gears to locking position, 50 gle chamber, which is provided in this body. This chamber is extended in length the full cen the transmission being concurrently rotated back ter to center distance between the shackle arms, and opposite walls of the chamber are parallel from the large Opening at the bottom clear to insert from its upper end, the lug 59 being lo 55 the chamber top wall through which are formed 'two relatively small spaced openings for exten cated somewhere in the arcuate recess in posi-'‘ ‘' sion therethrough of the shackle arms. Such tion to engage,'if need be, with‘ its bottom shoul to its initial position. a When the padlock parts are to be'assembled, the transmission is ?rst ?tted into the mounting The spring ends 51 and 58 are then ' a chamber which is easy to produce greatly re-‘ der 37. duces the metal, and consequently the weight, of engaged respectively, with the wing 55gand shoul der 30, thereby tending to rotate the transmission '60 the padlock body. In addition, according to our invention, no openings intothe chamber need be to the point where its lug 59 normally rests against the shoulder 36. The two gears are next mounted on the bosses 38 and 6| in the abnormal provided other than the large one at the bottom and the two small ones at the top. The insert may. be formed,‘ as by casting, from a suitable meshed positions shown in Fig. 7. The mount ing insert is now ready to be placed in the padlock 65 inexpensive material, of light weight if desired, and due to its parallel vertical walls it is adapted body into which thehshackle should also be ?tted. to ?t closely and cooperatively adjacent the in With the gears shifted around to the abnormal terior walls of the‘chamber. The insert, being position already referred to, there is su?icient itself chambered with an opening through’ its clearance for the head I‘! on the shackle long arm It) to advance past the driven gear Y. At 70 base wall, may be assembled together with the gears and transmission, and locked in the en this point (or optionally later) the insert may closing body all in advance of application of. the be permanently secured within the padlock body cylinder plug in place. This is desirable because as by crimping or knurling of the latter. in mass production all parts, except the particu The cylinder plug is last introduced in place through the opening 34. To reach its ?nal axial ‘‘75 lar assembly of plug tumblers, are interchange $2,408,137, 7 8 able. With assembly completed up to this, point, latter to movements within a ?xed range wherein cylinder plugs -m'ade to embody prescribed key changes, master keys, etc., may then'be ?tted into place as a concluding step. When this is thelocking means remains always within the con ?nestofthe shackle long arm, and stop means for the transmission affording thereto an increased movement range only when the plug is discon nected therefrom, the increased movement range permitting the locking means to be shifted be yond the con?nes of the shackle long arm. 4. In a padlock, a shackle formed with long done, the padlock is substantially complete, ready for use. ‘ We claim: 1. ,In a padlock, a chambered body substan tially fully open at one end and having in its 0D posite end two relative small openings, a shackle 10 and short arms having opposed notches, locking having two armsone movable through each small means engageable with both shackle arm notches, tension means urging the locking means to a posi opening into the chamber within the body,>an insert movable through the jfull opening into the tion beyond the con?nes of the shackle long arm, body chamber and provided with a base adapted a rotatable ‘key-operated ‘cylinder plug, stop to provide a closure therefor, dual locking de 15 means ‘whereby .to confine the ‘operating move ments'of the plug withinr?xed limits, and means vices-‘mounted on the insert'for movement with formingan operative connection betwen the plug in the con?nes thereof and in one position be ing engageable with both arms of the shackle and operating means whereby to transmit motion to restrain movement thereof, a, transmission also from the former to the latter and to con?ne mounted on the insert inoperative connection 20 movements ‘of the latter within limits ?xed by with the dual locking devices, spaced stop means those of "the plug; the locking means being there con?ning the rotary movements of the trans by held always within the con?nes of the shackle mission to a relatively wide range, tension means long arm. 7 , normally urging the transmission to a position 5. In a padlock, a shackle formed with long of engagement with one stop means in which 25 and short arms having opposed'notches, locking position the dual locking devices are engaged means engageable with both shackle arm notches, with both shackle arms, the dual locking devices tension meansurging the locking means to a being removed wholly from the con?nes of the position beyond the con?nes of the shackle long shackle arms when the transmission is operated arm, a rotatable key-‘operated cylinder plug, stop to the extreme opposite position in its movement 30 means engageable with the plug only When the range whereby to permit the shackle arms to be latter is advanced axially to substantially its ?nal advanced freely past the dual locking devices, position and acting to con?ne operating move key-controlled rotatable means axially movable ments of the plug within?xed limits, and means toward the transmission to establish operative forming an operative connection ‘between the connection therewith, and spaced stop means 35 plug andlocking means when the former has con?ning the rotary movements of the key-con advanced to a point short of engagement with its trolled means, and thereby the transmission, to stop means, said operative connection serving to a different and relatively narrow range in which transmit motion from the plug to the locking the dual locking devices act always to restrain means and also to con?ne movements of the advance of one shackle arm outwardly from the 40 locking means within limits ?xed by those of padlock body. the plug, the locking means being held thereby 2. In apadlock a shackle formed with long and always Within thecon?nes of the shackle long short arms having opposed notches, a pair of arm. interconnected locking devices one engageable '6. In a'padlock, a ‘shackle formed with a short with a notch of each shackle arm, a rotatable 45 arm and a long arm having a notch, locking cylinder plug operable by a key for movement means engageable with the shackle long arm within ?xed limits, a rotatable transmission in notch, tension means urging the locking means operative connection with both‘ the locking de to a position beyond the con?nes of the shackle vices and the plug and con?ned by the latter to long arm‘, a rotatable key-operated cylinder plug,. movements within a ?xed range wherein one 60 stop means engageable with the plug only when locking device remains always within the con the latteris advanced axially to‘ substantially its ?nes of the shackle long arm, and stop means ?nal position and acting to con?ne operating for the transmission affording thereto an in movements of the plug within ‘?xed limits, and creased movement range only When the plug is meansfo'rming an operative connection between disconnected therefrom, the increased movement 55 the plug and'locking means when the former has range permitting the said locking device to be advanced to ‘a'point short of engagement with its shifted beyond the con?nes of the shackle long stop‘means, said operative connection serving to transmit motion from the plug to the locking 3. In a padlock, a shackle formed with long and means and also to con?ne movements of the lock arm. - short arms having opposed notches, locking 60 means engageable with both shackle arm notches, ‘ a rotatable cylinder plug operable by ‘a key for movement within ?xed limits, a rotatable trans mission in operative connection with the locking means and with the plug and confined by the -65 ing-means within limits‘?xed by those of the plug, the locking means being thereby held always within‘th'e con?nes of‘the ?xed shackle. RAYMOND K. GRAY. ROLLIN LESTER GRAY.