US1849070A - Padlock - Google Patents

Description

.March 15, 1/932. c. BUEHNER PADLOCK Filed ot. 15, 1928 2 sheets-sheet 1 new um C. BUEHNER March 15, 1932.

PADLOCK Filed OO.. 15, 1928 2 Sheets-Sheet 2 v were@ v f cnnisiiniv BUEHNEELOF MILWAKE Patented Ylidar-15, 1932 i PiiiiLocK Y -applica/aum` fue@ oceani- 115, 192s."

The invention relates to improvementsin padlocks,` and has foritssobject to'produc'e ai cheap and securelockof thejtype nainedand provide a. novel form of key therefoii-."

The main object of the'finvention is'topro* vide a lock ofthe character described,'so fcon-`y structed as to make lit practically impossible to pick or open the shackle thereof byany other tool than the key provided for it. f' Y Another objecty of vide a lock ofthe characterdescribed,which may be easily'and cheaply manufactured andassembled, simple inconstr-uction', and which will` be Vecient in carrying out the,purposesV `for which it isjdesigned. v `wl l 'y vWith the 'foregoingand" other objects view, .which will appearaslthe description: proceeds, the invention c'onsi'stsin certain novel and improved features of construction, arrangements, and combination fof" partis, hereinafter more fully described, illustrated in thev accompanying drawings, and partie# ularly'pointed out in the appended claims, it

' beingiinderstood that various'changes in the form, size, vand minor details of thev structure may be kmade the invention.

vForthe nurpos'efof facilitating an under#- larcharacters "of reference are employed to indicatey corresponding'.

` Fig. l is a view in-sectionoi embodiment-l or" the invention showingthe same inlocked` position; f i

Fi 3 isV a view similar. to Figl, looking in the direction of the arrows,L Y

the `invention is lto prof the reference' character `teri al suitable vfor without",departingr'from'the yspiritor'sacrificing any of-ithe advantages 'of kstanti ally parallel to the similar parts throughout the several Vfigures inthe draw# 1. r j j .after described. Y l1 ig. 2 is a View similar to Fig; 1, with the lockin unlocked position;U i

E, wisconsin? 1 Serial' No. i I

lis a. view in' perspective of ai bolt used in the," embodiment Aof the invention Fig. Gis aiview in side elevation of ake'yrfor" said lock;Y l

Fi-gs. 7 and8 Vare views inperspective-'lo details;

' vvFi'glisv aview insectionof a niod-iiiedforni 'embodying thezinfvention; I i

Fig. ,5 is a view in-perspective'of the cylin= l .de-rin vl'iicvh the key passage is formed -Y 10510 ,of Figi .9 ;V

Figslll and' l2 are views details.; used in the modified 'form of inyerif i key 'employed in the'modified-form of the.;y 1nvention'.'f"" Y' il -VRe'fe'rring tothe drawings morel rspeciiic'ally perspecti'vienof l F g. 13 i'sfan elevationaliview ofthe-.lender ythe Vl, vdesignatesAll thev body ofi`l the padlock which-inay be substan;` -ti ally rectangular in'cross section'and ofafinaflY d v Vthe purpose, such 'a"s;"stee1,y brass,` or-thelike. The `body` is preferably inade offaj'singlefblookand has provided therein 'af-transverse bore 2,' eiitendii'ig'A from one side of tliegbody to a point fadjacentthe other sidethereof, said bore 2,"being'sub-v .top end ofthe body and lying in the upp'erpor'tion ofthe body.

longitudinal bore 3',

said body to a pointfnear the bottom thereof,

andlying adjacent one side thereof. A]I 'ecess' 4, adapted forthe reception of :one end of a shackle or hasp is providedY adjacentjthe other' side 'offsaid-body, said lrecess' beingv f provided intlie'topefd'ge of said body; A second longitudinal bore "5, extending from ythe bottom, edge of .the -body'to "establishconiv munication with the" bore 2,'-isprovided in vsaid body, Asubstantially'in the center thereof.

The bores v2 and 3, terminate in recessesfof re duced diameter for a iositionejdV in the transverseY,boi-e .gyfrrv purpose lto be hereinf is provided iii said v e body, said bore 3, `extending fromthe top of fslilding nioveinentthereon`,fisa 'suitable'meii-r beror bolt 6', provided witharecess 7 inf one end thereof, 4in which is adapted to'be received a coil spring 8, the other end of which spring is adapted to be received in the reduced end of the bore 2. Y

The free end of the bore-2, is closed by a screw plug 15, or the like, the head of said plug being countersunk in the side of said body, so as to provide a substantially smooth surface on the outside edge ofsaid body, aiter the plug 15 rhas been disposed in place. Y

A shackle or hasp 9 is provided, said shackle liavinga longer end 10, and a shorter end 11. The longer end 10, is adaptedvfor sliding movement in the bore 3, said longer end 10, being provided with a number `ot suitable recesses in the wall thereof, one of said recesses 12, being adapted for receiving the end of the bolt 6, when the latter is in locking engagement with said shackle, as clearly shown in lFig. 1, of the drawings. f The shorter end 11, of the shackle is adapted to be received Iin the recess 4, when said-v shackle is in locked position.

The lowermost edge of the end 10, of the shackle is provided with a recess in which is adaptedto be positioned one end oi' a spiral spring 13, the other end of which spring is received inthe lower reducedportion of the bore 3. The side wall of the longer end 10, of the shackle is provided with a recess 14, disposed opposite to the bolt receivingrecess 12, the end walls of said recess 14 are adapted to limitthe slidingmovement of the shackle in the bore 3. As stated, the Jfree end'o the bore 2, is closed by a suitable screw plug 15, having the head thereof counter sunk, as shown at 16, in the drawings. The inner end of said screw plug 15, is provided with a projection or lug 17, adapted to be received vin the recess 14, for limiting the upv and down movement of said shackle. The lower end 10, of the shackle may also beprovided with an annular groove, in which is adapted to be tted a washer`18, of rubber or the like, for assuring proper operation of the shackle in the bore 3.

1t will be noted that the spring 13, will normally force the vshackle 9 to its upper or unlocked position, as shown in Fig. 2, and when the shackle is in that position, the bolt 6` must ot necessity be out otengagement with the `recess 12, or in the position shown in Fig. 2. The spring' 8, normally forces the bolt .to the ,right `as viewed in Figs. 1 vand 2. Y

It order, therefore to permit the spring 13, to force the shackle to its upper oriinlocked position, the bolt 6, must be withdrawn from its engagement with `the recess 12. To cause a withdrawal of the lbolt 6, the following novel and improved means are provided. A hollow cylinder 20, open at `its lower Iend and having a suitably shaped projection or lug 21, integrally formed therewith at the upper face thereof, is provided, said cylinder being adapted to be `received in theupper portion of the bore. The projection 21, isadapted ders 20 and to be received in a suitable recess 22, provided in the underside ot the bolt 6, whereby, the rotation ot the cylinder 20, will cause a sliding movement of the bolt 6. The following means are provided for rotating said cylinder 20. A pair of longitudinal guiding slots 23, are provided in the cylinder 26, said slots extending from the lower open end of said cylinder to a point adjacent the top thereof. A spring 23 is received in said hollow cylinder, and the lower open end of said cylinder is closed by an annular head or member 24, said head 24, having a pair of diametrically opposed lugs 25 adapted to be received in said slots 23, :tor sliding up and down movement therein. The lower face .of the member 24 is provided with a diametric slot or groove 26, for a purpose to be presently described.

Adapted to be positioned in the lower portion of the bore 5, is a second hollow cylinder 27, the upper bore of which lis adapted to abut against the lower tace of the member or head 21. VA suitable countersunk screw 28, is provided for securely locking said cyliii- 27 in place in the bore 5. The top of said hollow cylinder 27, is closed by a suitable washer 29, said washer having a diametric slotrSO, provided therein, andV when in assembled position said slot 30, is adapted to register with the slot or groove 26, provided'in the member or head 24, closing the lower end oi' thecylinder 20. A washer 31, is employed for closing the lower end of said cylinder 27 said washer being provided with a vdiametric .slot 32, said slot being disposed at an angle to the slot 30, in the upper washer 29.

A similar washer 33, provided with a diametric slot 311, is provided in the 4cylinder 27 intermediate the top and bottom thereof, the slot Bil, being disposed at an angle to both the slots 30 and 32. It will thus be noted thataa substantially tortuous passage is provided between tlie outside of the cylinder 27, and the groove or slot 26, provided in the head vor member 24, closing the lower end of the .cylinder 20. lt will be readily understood that by .the insertion of a proper `implement in the groove 26., of Vthe member 2i, and rotating direction, the bolt 6, wil-l be withdrawn and the shackle 9, forced by the spring 13, to the open position. f

The specially adapted key l() for insertion in the cylinder 27, 26, consists of a flat piece oi metal, or the like, eta thickness adapted to pass through the slots 30, 82 and 311, and the end thereof being adapted to be received in the groove 26. The said key l() is twisted to produce the necessary twists therein for adapting it to readily pass through .its tortuous mating passage formed in the cylinder 27. The body et the key 'terminates in a handle'11, and the length of said bedy of the key is suilicient to permit the ,same in a counterclockwise 1* for engaging iii the groove frio r2l, of the cylinder 20, may able ballbearing 43, for engagement with they Y Vwithdrawing the bolt 6. v

it 'toi vbeiin'sert-edl' in the tor-toons passage,

lforn'ied'infthe'l cylinder-27,1% as to have the Vfreeend 42, thereof,1received in thegroove 26. The key when insertedthrough the slot 32, will traverse the tortuous passage and the end 42'thereof will engage inthe groove ..26, and when 'turned in the proper'directionwill cause -a rotation of the 'cylinder-20, which will in turn cause Va'sliding 'movement .of thebolt 6, thereby releasing the shackle 9.v

If desired, inthe top face ofthe projection be provided, aVv suitupper wall V'of the cut away1portion` 22,xof the bolt 6, for facilitating the rotation of said cylinder 20. r f

It will be noted that the washers 29, 3l, and 33, provided/in the cylinder' 27, are spaced from each other, the angular relation of the slotsin said washers being such as toreadily permit the insertion of thekey 40, without,- any impediment,A

By providing the spaced washers as shown, tampering with apiece of flat metal is prevented, as a tool or implement of snliicient flexibility to be introduced` through the tortuous passage formed bythe slots 32, 34, and 36,y will not retain its form' to permit it to rotate the cylinder 2 0, for

rlfhe key 40, is of correct twist and made of unyielding material and when inserted into its mating passage will transverse the same without impediment until the end 42, thereof',

will be'received in thev groove 26., after'whichi it may be rotated kto causeV a corresponding` y rotation of the cylinder20. A'washer 45, of

rubber or the like, is provided on the end 10 of` the shackle for preventing dust'or vmoisture from' getting into'the. bore 3.

The body 50, is

1 51, and 52, is provided a bore 53, similar to J v from each other.

In the modified form shown 12 inclusive, the body 50, of the lock is similar to the body 1, in the first modication;

provided with apair of longitudinal bores 51, and52, extending completely thro ugh the body. Intermediate the bores the bore 5, the top of said bore 53, being-'in communication with a transverse bore 54, the

ends of which bore 54, communicate with theA longitudinal bores 5l and 52. Disposed ywithin the transverse'bore 54, is a pairof cooperating bolts and 56, said bolts'being provided with collars 57 and 58,'in their inner ends,V

.erly rotating said implement, the said collars will be caused to separate, thus moving 'f the ends of said bolts closer togetherfor lina suitable member..

' head` 66,

in rigszve ai;

wardly;` Thelfreefendiof said bore 154, may

bejclosedby as'uitablescrew plug 60,which 'f i may be countersunk in' 'the ofthe lock.' 'Adapted' for. reception. in kthe longitudinal side-v of the body bores 51 and52, arethe ends of a shackle or hasp V61,the innerside` wallsrof said ends:

ofL the shackle'. being provided with suitable Y i notches 62, which are adapted toengage with the ends'ofthe bolts 55an`ol 56, forholding the saidv shackle, locked position, as shownin Fig. 9v. 1

The following means are provided `for causing -afwithdrawal of the bolts in-order to permit the removal of the shackle from the body of the lock. Positioned inthe upper portion of the bore 53, isa hollow cylinder 63, open at its lower end, and closed at the top, and provided on its Vclosed end with a projection 64, and a pin or stud 65. .The projection 64,'is adapted to be receivedfbetween the collarsl 57 and 58, and when the cylinder '63, is Arotated in the properdirection the said projection 64,is adapted for spreadingsaid.

collars in order-to cause .an inward movement of the 'ends-of said bolts,ther'ebywithdrawing the. same from the yengagement with the notches 62,1'in the shackle 61. Suitable. longitudinal guide slots 15,1 are provided in the sidesI of said..fcylinder, -andthe lower open 'end-v. olf-said ycylinderV may ibe closed Yby or head966, which isprovided with a-;diametrc groove` "67, and through which'eXt-ends a rod 68, the ends of saidv rod; extending lbeyond `the -walls f of the guide'din the 'slots 15, provided inthe cylinder 63. Y'

' Aspiral .spring-69, is positioned inside' of lsaid hollowcylinder 63, for holding the' -headfv 66, against the top of a hollowlcylinder-Q, y

a manner y i .of ycylinder, 27, andais pro,- y y vided 'withga tortuous passage Af rrnnthe out- Vsideth-ereofto the head 66. A suitable screw whichr cylinder is constructed-in similar to that Vand are adapted to beA received and 7l, is provided for securely locking said cyl-j inder 70, in place-in thebody ofthe lock:

The operati-on of the modified form is tlie i' same as that ofthe first :form y endfof the key employed in this modification isbifurcated v to straddle theY rodk l68' whenit insertedinto the groove, 67 ofthe head 66.-

descrbed. The Y The construction of the lock affords means for preventing thepicking or." opening ofjrfthe'V l i' vided for it. f

shackleby any'otherlt'ool than the key pron is feasible to Slightly hangs the angular i relation between lthe slots in the washers,

thereby changing the twistof the key passage and by making a correspondingchange in the twistjof the. key, a newpatternisgformedv It lwill thus befpossible to have no great number f Yofkeys of the sainepattern made.l which will prove an additional',v .advantage secured by l13o .this form of lockaIld-key. v,

It is believed that my invention, its mode of construction, and many of its advantages should be readily understood from the lforegoing without further description, and. should also be manifest that while preferred embodiments of theV invention have been shown and described for illustrative purposes, the structural details are nevertheless capable of wide variation within the purview of my invention, as defined in the appended claims.

What I claim and desire to secure by Letters Patent of the United States is:

l. A device of the character described, comprising a lock case having twin shackle sockets extending therethrough, a shackle having its legs received in said sockets, each of said shackle legs being provided with a locking notch, a pair of cooperating bolt sections slidably mounted in said lock case adapted for engagement with said shackle legs for holding the same in locked position, a single spring means adapted for holding said bolt sections inreXtended position, projections provided on said bolt sections adapted for engagement with each other for preventing the disassembly of said bolt sections, an velongated lng disposed between said projections adapted for moving said projections away from each other wherebylthe ends of said bolt sections will be brought out of engagement with said notches, saidlng being carried by a cylinder disposed in said lock case and adapted for rotarymovement there- 2. A padlock comprisingr a lock case having twin shackle sockets extendingrtherethrough, a shackle having its leg portions re ceived in said sockets, each of said leg portions being provided with a locking notch, sliding, cooperating bolt sections disposed in position for engagement with the notches in the shackle legs for locking thev shackle in the lock case, said bolt sections being provided adjacent one end with a segmental projection'r the inner end of one of said projections being adapted for engagement with the inner end of the other of said projections when the sections are in assembled posiion, culprit portions provided. on each of said bolt sections intermediate the ends thereof for receiving for sliding movement therein the projection of the other of said bolt sections, a single spring means adapted for holding said bolt sections in their extended position, an elongated lug disposed between the inner ends of said projections and adapted, when rotated, to force said projections away from each other and against the action of said spring means, said lug being carried by a cylinder disposed in said lock case, and being adapted for rotary movement therein.

3. A padlock comprising a case having twin shackle sockets extending therethrough, a shackle having its leg portions received in said sockets, each of saidleg portions being provided with a locking notch, a pair of cooperating bolt sections disposed in position for engagement with the notches in the leg portions, saidvbolt sections being provided with segmental projections adjacent oneend thereof, Vcut ont portions provided oneach of said bolt 'sections intermediate the ends thereof for receiving for therein the'projection of the other of said bolt sections, a single spring means received between said bolt sections and adapted for holding thesame in extended position, an elongated lug disposed between the adjacent ends of said projectionsl and adapted, when rotated, for forcing said projections away from each other against the action of said spring means, saidlug being carried by a cylinder disposed in said lock case, said cylinder being adapted for rotary movement therein.

.ln testimony whereof l aflix my signature.

CHRISTIAN BUEHNER.

sliding movementV

Images