US2048570A - Padlock - Google Patents

Description

July 21, 1936- s. c. sLAYMAKl-:R 2,048,570

PADLOCK Filed April 16, 1936 Patented July 21, 1936 UNITED STAT"ES-.-A

PADLOCK.

Samuel C. Slaymaker, LancasterfPar, assignor-'tov The rSlaymaker Lock'Company; Lancaster, Pa., acorporation of Pennsylvania Application April 16,

9 Claims.

'I'his invention relates to improvements in locks, and .more particularly to padlocks, with reference to that class of such devicescomprising a sliding shackle within a lock casing.

It aims to provide an improved lock adapted for general use, which canA be made and soldatv a reasonably low cost.

Among the several objects of the invention, the primary purpose is to produce an especially strong, dependable and durable lock, having a simplified structure and operative mechanism, capable of being assembled easily and quickly with little need of adjustment yor regulation.

Another primary objectY is to provide a-lock in which the operative parts are retained securely in place with protection against rupturing, distortion and throwing out of function by attempts to break or force it open.

Additional objects, as well as thegeneral-concept and improvement features of the invention, will be made to appear from the following description with reference to the attached drawing illus'- trating one practicable form and embodiment of the same already in commercial production.

Insaid drawing:

Fig. 1 is a front face elevation of a padlookcomprising the invention; Y

Fig. 2 is a corresponding view-of the same with the front face member removed to :reveal itsoperative parts, shown in lockedposition;l

Fig. 3 is an inverted plan View of the-removed front face member, as if swung` from Fig.2 like the page of a book would. be turned;

u Fig. 4 is a view similar toFig. 2 showing thev positioning of parts upon insertion of Aan opening key;

Fig. 5 is a view in longitudinal section through the lock casing, showing the parts in openingpositionwith turning of the key;

Fig.. 6 is an end-wise velevation of the lock shackle, with an associated element shown in fragmentary section;

Fig. 7 is a transverse section takenonthe lines 'I-l of Figs. 1 and 2;

Fig. 8 is a lower-plane section taken on-the lines 8-8 of the same gures;

Fig. 9 is an enlarged cross-section of the lock tumbler barrel or cylinder, illustrating. a detail;

and.

Fig. 10 is an elevation of the open casing, with the locking mechanism and other parts removed to show its interior formation.

The illustrative lock includes a casing -lrlfof rectangular block form, having lateralcurvatures giving it an oval shape in cross section. This casing is cast or. molded in a single piece ofstrong metal and comprises a hollow or cavitied. -body of substantial wall thickness, ,withV anopening-in the front portion making it eiectually openfaced.. In the inner Wall of the casing, a thick- 1936, .Serial No. '14.2717v (Cl. 'Z0-405)Y eningabutmentshoulder. ITIa is formed at the top rightandleft-corners, .and a similar butlonger abutmentllb is formedalong one sidein this instance `the.right=,side-to the corresponding bottom=cornerleaving a-space between it and the iirst-namedabutment. at. that side. A,.fourth abutment .Ilc isformedin-the remaining bottom corner. Theseseveral abutments serve to reenforce andg-reatly strengthen the casing. In addition they-.advantageously serve. other purposes that-.will later appear,.pursuant towhich the three i'lrst. described` abutments are inthis instance made `surfaceilevel with each other. In the top of. thecasing,..apertures.|2:.and I2' are provided to .receive.ashacklefonebeing extended through the spacedabutmentsl Ia and .I Ib at one side and the other. extending, only-.partially through the single abutment. Il. atA the opposite side, so as respectively. to accommodate the longer and shorter: armsY of. the shackle.

The. vopening in .thefront face of the casing, indicated..by I3, is...rectangular .in this instance, conforming to` thev shape of the casing. Said openingis .closed,..when the locked parts .are assembled,vr bya. face plate Ill fitting thereinto. Thisplate isa strong metal member of vsubstantial thickness,. having `.the peculiar .form illustrated in Fig. 3, withatsurfaceportions Ide and I4b resting-respectively on thelevel abutments Ila and i Ih, and aridge Mc resting .onthe abutment Ilc of. the;.casing,.so as to be firm and solid in position. .Anboss .|4. formed on its inner. side extendsthrough an opening. I5.in the abutment I `l Pffor. a purpose vwhich will .be describedpresent-Y 1y.f The plateand .casing Vtogether formcongurative. lcradlespacesor bedsfor. the operative parts ofy the. lock. so as to emaintainthem. properly tight andfsecure. SaicLcox/er plate is .fastened in. place by crimping-or, swaging thesurrounding edges of the casing over ,the same,the oppositetwo parallel'edges I'l' represented being ordinarily quite sufficient yfor `the purpose.

The=shackle .securedin the .casing comprises `the usual Urshaped member -IB of highly. tempered steel, having its longer. -arm '.I 6@ iitting inr the extendedaperturell andits shorter arm lbviit ting into the abbreviated.apertureI2.` -Guidably jorunalledto. slide-.and swivel in the two abutments. Lla and-lib, saidlonger. armv of this shackle is formed.with.=a..recess I.'|..at.its.end into which the boss .M extending. through the opening l5 engages .tdlimitv tl:1e...outward slide vmovement by a shoulder, striking thereagainst, said recess merginginto a. reduced annular or groove portionl' receivingv thebossall. the way around so as.to.a1low. the arm to swivel while still retained by said .boss in; the outward limit. Said longer arm..is..alsoformed with detents I8 in opposite sides, .at-the point. of spanning the space I9 betweenthe. aforementioned abutments Ha and l lb, 60

The purpose of 4these will appear presently. A

spring 2U V,applied in the receivingaperture of'Y Vthis arm so as4 to 4tensionagainst its end serves to eject the Vshackle with a snap action'when is released from the locked position. Y

Insidelthe Casinga paWl .Comprising vaV sprirl Vspring member 2| out of engagement with the Y `member 2| of hair-pin form provides the locking element. Y This pawl or Ymember is disposed cross- Ywise of the casing below the top corner abutments,

' with its legs 2|@L and 2|b straddling the longer arm of the shackle and engaging normally in the `detents `I8 of the same (see'Fig."7-)";"It's spring disposed longitudinally ofthe same, andiworkingV in a retaining bed or cradle formedby the casing and cover plate. This Vcylinder Yis'adapted to turn in a clockwise direction as Aviewed in side elevation-or countercrlockwise as viewed inthe sectional Figs. 7 and B-andvcarries'an ovalshapedrboss 22a-on its inner end extending between the legs of the'spring member 2| so as to Vspreadsaid legs apart when the cylinderis turned. Its otherend ts into a key hole 23 in thebotjtom `of the casing and presents a slotV through which to Vinsert a key. Arranged in the; bodyof Y the cylinder are a plurality ofV disc tumblers 24,

normally projecting laterally over aV shoulder 25 ('see'Figs 2 and18) formed in the abutment |b or wallzof the casingy so as vto prevent the cylinder from turning in the lintended directionv by striking thereagainst.V `An overextending ridge 26 formed in the cover plate similarly prevents turning in'the'opposite direction; and a small shoulder 21 formedon the under side of the cylinder itself so as to'strike against an edge 28 1in the cradling wall ofthe casing" supplements this latter preventative provision. SaidV disc Y Y50 tumblers are held normally in the projecting position by individual expansion springs'29 housed in theV cylinder and pressingV lightlyV against lug-V .d portions 24a provided thereon (see Fig.' 9). Each,`

Vof course, moves in a slide-way and has a central slot 30 registerable'with the key slot of the cylinder.V Y Y Thus the v.locking andV operative mechanism Vwithin the casing comprisesnsimply apawllatch member and a Vdisc. cylinder, which latter isrotatable one wayfby a key.V There are'nor other partsin the casing and no accessory means for holding thefparts in place.

The key slot 3|'of vthe disc tumbler cylinder'is,

of course, provided with the usual key guard (not shown) tractsrthe tumblers asrit is inserted,v but does not Vhold them all retracted'V simultaneouslyY until thrust the full way in. In such position, illusf trated in Fig. 4,k the tumblers Varerfreed from Ystill full way in the cylinder, to the right.

"the shoulder'25 so as to allow the cylinder to turn. `Thisrturn is effected by turningtheV key, It is limited to a Vquarter circle, however, by a small kshoulder 33 formed on the upper side of the cylinder, whichV strikes a shoulder-34 formed in Y shoulder 25. a

Al properV key 32 ttedthereinto re- Vabutments theV abutment ||b or wall of the casingrat the 'bottom end.

. Fig. 5 illustrates the positioning of the parts at the limit of the cylinders opening or unlocking jturn. At thecompletion of the turn, or just'be- 5 f fore, the boss 22a on the inner end of the cylinder is swung sufciently to spread the legs of the detents of the Y shackle arm, whereuponV the Y shackle is released and expelled-by spring ,suiciently to be swung out on its swivel axis.

Relocking is eiected by pushing Ythe shackle back in and turning the cylinder back to the original 1 positiono r simply by pushing the shackle back into place and withdrawing .the'key, The lockis adapted to snap closingand when'the keyis withdrawn, the cylinder and tumblerstendvrto'Y return to normalrposition, the first by action of the spring member 2| on its boss, andthe second by action of their individualY springs 29. The shackle is'eifectually locked in place asY soon as the legsof the spring memberrrZl Vreengage in the detents of its swivel arm, even though the Vcylin- Y der might not be Vreturned fullyY to its normalV Y position with Ythe tumblers overextending the As the foregoing description makes the oper-V ation of the lock entirely clear, it is unnecessary to describe itin further detail. The lock, of course, operates essentially the same as lothers of its `kind and the novelty resides in the form of its casing and cover plate, and inthe form of the shackle, combined with the'inner operative or mechanism parts, all functioning interdependently. The'improvement features and advantages of the lock so providedwill Vbe apparent to' those familiar with the art. f

Obviously, various changesmay-be made in the'form and arrangementeof the diierentparts', in different combinations and sub #combinations ,of 'relation` `to each other, without departing from the spirit and scope of the invention. Therefore', the appendedV claims are not intended to limit the invention to the specific form and Varrangement shown and described, l Y Y `,Having `thus described myrinvention, what I ent of the UnitedStates is: Y n

il. A padlock,comprising armetal casing formed to receive a shackle and having van opening in claim as new and-desire to secure by Letters Patits face, a shackle extendingV into the casing with an armiournalledin af-thickened interior wall Y portion thereof, -and a metal cover plate secured in said opening havingV a boss extending through an opening in said thickened inner wall portion V into'engagement with a recess said shackle armto preventthe shackle being withdrawn be-Y yond a predetermined limit.

2. A padlock, comprising Va j metal Vcasing formed with integral abutments in its inner wall corners,V one ofY said abutments being extendedV Vpartially along onefside, and with an opening in its front face, a shackle fitting into the casing withone of its arms journalled in the corner and extended abutments at one side,v and a cover plate fitted in said faceopening having a Vboss extending through an opening in said side 'ex' tended abutment 'intoV engagement with al recess'V in the shackle arm so as to limit'the latters outward withdrawal; said cover plate being fastened Yin place with an inward bearing upon said corner 3. A padlock, comprising a metal casing formed with an opening in its face and with integral'` 'abutments in its-inner Wall corners, one of said 75 Y abutments being extended partially along one side, a shackle tted in the casing having one arm journalled in the corner and extended abutments at one side, a metal cover plate tted in the opening in the face of the casing and formed with an inner boss extending through an opening in the extended side abutment into a recess formed in the shackle arm so as to limit the outward movement of the latter, said cover plate being secured in said opening, a pawl member engaging the shackle within the casing, and a key-turned disc tumbler cylinder moving said pawl to disengage the shackle; the casing and the cover plate together forming congurative cradle spaces or beds retaining the pawl and cylinder members in place.

4. A padlock, comprising a metal casing formed with an opening in its face and with integral thickening and reenforcing walls abutments in each of its inner wall corners, one of the same being extended partially along one side leaving a space between it and the other corner abutment at that side, a shackle tted in the casing with one arm slidably journalled in the corner and extended abutments at said one side, a metal cover plate tted in the opening inthe face of the casing and formed with an inner boss extending through an opening in the extended side abutment into a recess formed in the shackle arm so as to limit the slide movement of the latter, said cover plate being secured in said o-pening with an inward bearing upon said corner abutments of the casing, a spring pawl member engaging the shackle arm within the casing between said extended and adjacent corner abutments at one side, and a key-turned disc tumbler cylinder operating said pawl to disengage the shackle by partial rotation in one direction permitted with key insertion thereinto; the casing and the cver plate together forming congurative cradle spaces or beds retaining the spring pawl and cylinder members in place.

5. A padlock, comprising a casing consisting of a cavitied metal body formed with an opening in its face and with inner integral wall lcorner abutments, one of which is extended along one side, a shackle tted in the casing with one arm journalled in the corner and extended abutments at one side, a metal cover plate fitted in the face opening of the casing and having a boss extending through an opening in the extended side abutment into a recess formed in the shackle arm so as to limit the outward movement of the latter and still allow the same to swivel in the outward position, said cover plate being secured in said opening with an inward bearing rest upon said corner abutments of the casing, a spring member having pawl portions engaging in opposite sides of said shackle arm within the casing, and a key-turnable disc tumbler cylinder having a boss working between the pawl portions of the spring member to Spread them so as to disengage the shackle arm when the cylinder is turned in a predetermined direction by the operating key; said cylinder being normally unturnable and said casing and -cover plate together forming congurative cradlespaces or beds retaining the latching spring member and cylinder in place without independent fastening means.

6. A padlock, comprising a casing consisting of a cavitied metal body formed with an opening in its face and with integral shoulder abutments in its inner wall corners, one of the same being extended along one side, a shackle tted in the casing with one arm journalled in the corner and extended abutments at one side, a metal cover plate tted in the face opening of the casing and having a boss extending through an opening in the extended side abutment into `a recess formed in the shackle arm so as to limit the outward movement of the latter and still allow the same to swivel in the outward position, said cover plate being secured in said opening with surrounding edge portions of the casing marginally overlapping the same and with an inward bearing upon said inner corner abutments of the casing, a spring pawl member having its legs straddling and engaging detents formed in opposite sides of the shackle arm within the casing, and a key-turned disc tumbler cylinder having an extended boss working between the legs of the pawl member to spread them out of engagement with the shackle arm when the cylinder is turned by its key in a predetermined direction, said cylinder having a plurality of disc tumblers laterally extended over a shoulder in the casing to normally prevent the same from turning but retractable by the key to allow the same to turn; and said casing and cover plate together forming congurative cradle spaces or beds retaining the spring pawl and cylinder members in place without other fastening.

7. A padlock, comprising a cavitied metal casing formed to receive a shackle and having an opening in its face, a shackle extending into the casing with an arm journalled in a thickened interior wall portion thereof, a stop piece extended through said thickened wall portion into engagement with a recess in said arm of the shackle to prevent the same being withdrawn beyond .a predetermined limit, and a metal cover plate secured in the opening in the face of the casing with a purchase rest bearing partially upon said thickened wall portion and partially upon other inner wall portions formed in the casing.

8. -A padlock, comprising a solid metal casing cavitied to receive the operative parts and having an opening in its face, a shackle extending into the casing with an arm journalled in a thickened interior wall portion thereof, a stop pin tted in said thickened wall portion in engagement with a recess in said arm to prevent the shackle being withdrawn beyond a predetermined limit, a spring pawl normally engaging the shackle in locked position, a tumbler cylinder adapted to .actuate the pawl by key turn, and a metal cover plate secured in the opening in the face of the casing with an inward rest bearing upc-n said thickened and other wall portions of the casing.

9. A padlock, comprising a solid metal casing formed with recesses to receive a shackle and operative parts and having an opening in its face, a shackle extending into the casing with an arm journalled in a thickened interior wall portion thereof 4at one side, means disposed in said thickened wall portions in engagement with said arm to prevent the same being Withdrawn beyond a predetermined limit, a spring pawl member normally engaging the arm in locking position, a tumbler cylinder adapted to actuate said pawl member to disengage the shackle arm with key turn, and a metal cover plate secured in the opening in the face of the casing, said cover plate being formed complementarily to the casing so as therewith to cradle the spring pawl and cylinder members and bearing inwardly upon rest portions formed in the interior walls of the casing so las to be held firm and solid in place.

SAMUEL C. SLAYMAKER.

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