US2000280A - Lock - Google Patents

Description

May 7; 1935- J, w. Frrz GERALD 2,000,280 y Loox Filed Nov. 5, 1934Y Y I l'J7/7H W15/250m@ V "k-72 I (En il May 7 1935 l 2,000,280

' Application November 5, 1934, l l 13 (CUM-910i y t I. This invention relates to new and useful imas by an unauthoizedattempttdmanipulaiethe provementsinlocksand particularly to that type lock.- j 1 y f- A 1 of cylinder lock now commonly used in door han Referring now more-particularly to the acdies of automobiies'wherein the drivingmember companying drawing inwhich like numerals in- 5 or handle has no connection 4with the latching dicate like vparts throughout theseveral views, li5

mechanism in the locked condition. Athe numeral 5 designates partoffan automobile Previous to the present invention, lby driving ,door handle which is provided witha series of a suitable implement into the keyway and applyaxially aligned and communicating bores 8,1 'and ing torsion to the cylinden'the locking'effect of 8, of successively smaller diameter. ,l y

I0 the lock could be overcome and a suillcient con- Mounted in the -outer bores 8 and 1' is the 10 nection between the driving niembe'i and latchshell or casing lof a conventional cylinder'A lock ing mechanism could be obtained to enable acincluding a cylinder l'diSpOSedWithin'theBhnll' tuation of the latter, or casing, and tumblers (not shown) adapted to- Itis therefore a broad object of this invention lock the oylinderazainst rotation in the shell.- in to provide a locking unit or the character dethe tumblers being retraotiblefby a' proper key 15 l scribed v'which is so constructed that the percusinsertnble into a keyway U t0 free'the Uyuni? sion force on the end of the lockcylinder incider fOr rotation Y, n Y l dental to an attempt at unauthorized manipu- The Shell 0r 6351118 9 isruitably held lation of the lock positively secures its bolt against rotation in the bOlBS 3 and 7 Of the (1001 hnndle,

B0' actuation and thereby effectively precludes the esbut 1S free t0 Shift longitudinally for a Purpose 20 tablishment of a. driving connection between the t0 be helenftel described-f Normally the Shell, driving member and the latch mechanism. and consequently the entire Cylinder lock Stlnof More specifically itis an object of'this inven `ture, iS yeldinly mintined in its OnteinlOSt tion to provide .a lock wherein` any attemptedl position with the outer end ofthe cylinder nosh 2li`l unauthorized manipulation of the lock `cylinder With the Outer face 0f the door hnndleb! ill-Spring `2li which entails driving an implement intothe lock il, connned between lthey inner'end 'of` :the Shell keyway',`shears a frangible pin'and effects a conand the 19017150111L 0f the bore "l: fr; nection between the stem of the 'lock cylinder and The 100k Cylinder. W has a Stem u, Pl'OectmE its boit to positiveiy secure the bolt against actu,. from its inner end to be received in the innermost ation by a driving maribeln n Y bore l. The inner endo! thisvstem has ana`nnu. 3Q

" with the above and other objects inview which 1er groove l5 inwhieh e pin l0 viixed in the 'adwii1-appear 'as the description proceeds, this in v jacent B01171011` 0f 'the 100i handle 18 receivedvention resides in the novel construction, combi; The Pin-'31111011811' engagement with thelmn??? nation and arrangement of .parts substantially as Wall 0f, .thggmove 5 lim-75' the Qutwad' 1033i' hereinafter described and more particularly dejtudinl P'leOjeCtiOnOf the 100k iinitby 188911118 35 nned by the appended claims, it being understood ilnd is 0i Summer Width i0. Permit. 1o degree.V that s'uchch'anges in the precise 'embodiment of Of'mwardlongitudiml shifting 0f the'assembled the hereindisclosed inventionmay bevmade asV 10d! for 8 DnI'DOSe t0 be hel'einl de'. come within-the scope of the claims. A, f Sel'ibed l o o The accompanying drgwlngulustrates (,Ileccxn The innermost end' 0f :the Stem S reduced in 40 plete exampie of the physical embodiment or the diameter 'and has e 0011er i' fixed thereto by e invention constructed according to the best mode frangible shear Pin '.8 m a Position at* which sol-fmdevlsed for the practical appllcatlonm the the end of the stem is ilush with the adjacent principles thereof, 'andln which: inner face of the collar. Thisinner face oil the Figure 1 15 o, View substantially ln longltudlnal collar bears against the cylindrical surface of a 45 sootion through on automobile door handle lllus locking bolt I9 siidable in a transverse bore 20 trating the application of this invention thereto; in the adjacent handle partj f ll'igureZisanenlarged longitudinal section view Projecting from the inner face 0f the 00u31' l of the inne!- ond ofthe handle showing the bolt I1 is an eccentric v'driving cam 2| which projects lockedagainst actuation; i l into an annular groove 22 in the locking bolt 60 .Home 3 ig'grpergpective view of the inner end 'so that upon rotation of the stem il effected of thelock'stem' showing its driving connection by manipulation of the key, the bolt -is actuated with the bolt; and y longitudinally to and from an operative position, Figure! is atperspective view similar toFigure projectingone end thereof from the adjacent 5I 3 but showing the bolt lockedagainst actuation end of the bore 20 for engagement with a latch- .55

- application ofv torsional force nection between such implement and thekeyway ing mechanism, not shown, lto effect a driving, connection between the handle and the latching mechanism.

Normally the lock cylinder is yieldingly held in a position of rotation holding the locking bolt in its inoperative position with `its ends substantially ilush with the ends of thebore in which it operates, by a torsion spring 23. The spring 23 is coiled about the stem. Il adjacent its attachment' to the cylinder and has its ends hooked over abutments on the lock cylinder and thev sleeve or casing 9. Inasmuch as this manner oi holding the lock cylinder in its normal locked position of rotation forms no part of this in- `vention and is in accordancey with conventional practice, it has not been shown in detail. i

In-operation, thelatching mechanism to be actuated is operableto its released or unlocked position by the application o! turning force thereon through the medium ofthe handle when the locking bolt is projected lto itsfoperative position by rotationof -the lock unit. Ordinarily, such rotation of the cylinder is eiectedby the use of a proper key. Y

It an unauthor dattempt is made to manipulate the lockas by the insertion of an implement into the outer end of the keyway and the thereon, the conto be ,adequate to enable the transmission or the requisite turning'torce to the cylinder, requires that the implement be forcibly driven into the kyway. i I

During the applicationof the percussion force incidental to the driving of an implement into the keyway, the frangible shear pin shears oii, thus freeing the collar I1 for rotation with re-v4 spect to the stem,7and permitting the projection of the inner end of the stern into the annular groove!! in the locking bolt as vshown in Figure 2.

This results from `the fact that the percussion force acting to drive the lock unit and consequently the stem i4 inwardly is takenup solely by the abutment 'of the collar I1 against the locking bolt I8, the -annular groove 2l in the bolt being ofsunicient widthfto receive the inner end of the stem.

Hence, upon shearing of the pin I8 and inward endwise movement ofthe stem, actuation of the` locking bolt to its operative position becomes utterly impossible. i

The projection of the locking bolt to operative position being thus precluded, it follows that driving connection between the handle and the latching mechanism cannot be eilected.

What I claim as my inventionis:

1. Inalock of the character described, a locking bolt,a key operablelock cylinder, and a driving connection between the cylinder and the-lock?. ing bolt Afor translating rotation of the cylinder into'llnear movement on the part of thelocking bolt, said connectionv including a frangible partl adapted ,to give way under a percussive force applied to the cylinder so as to render the locking bolt inoperable by subsequent rotation of .the

cylinder. f Y y 2. In a lock of the character described, an

cylinder, aconnection between the lock cylinder, and the locking bolt whereby the bolt is movable endwise by rotation of the cylinder, said connectibnincluding afrangibl'e part adapted to give way under a percussive force applied to the cylinder which-results in an endwise movement ofthe driving bolt inoperable by the cylinder.

part, said frangible means being adapted to give way under the iniluence oi a percussive force applied to the cylinder so as to tree the eccentric member from the cylinder and render the vi. m a. lock or the character described, a, mounting member, a locking bolt mounted for endwise movement in the mounting member, op-

erating means for the bolt, and a connection between the operating means and the bolt for tramiating rotation of the operating means into endwise movement'on the part of the bolt, said connection including a frangibie part adapted to give way under a percussive force so as torender the bolt inoperable by said operating means.

5. In a lock Vof the character described, a

: manually operable driving member for transmitting motion to mechanism to be actuated, a locking' bolt carried by the driving member and projectable endwise to a position aiording a connection between the driving member and mechanism to be actuated thereby, operating means mounted inthe driving member for projecting the locking 1 bolt to itsoperative position, anda connection between the operating means; and the locking bolt adapted to give way under a percussive torce -so'as to render the locking bolt subsequently inoperable.

6. In a lock of the charactervdescribed, a driving member aiiording a lock housing and adapted for imparting predetermined motion to mechanism to be actuated, a locking bolt carried by said driving memberand movable to and from a position affording a driving connection betweenv said driving member and the mechanism to be actuated thereby, a key operable lock cylinder in the driving member, anda connection. between the lock cylinder and the locking bolt for moving the locking bolt to and from its operative position by rotation of the cylinder, said connection including a frangible part adapted to give way under a percussive force sovthat said connection is rendered incapable of transmitting movement to the locking bolt.

7. In a lock of the character described, a'key operable lock cylinder, 'a locking bolt, a connection between the cylinder and the bolt comprising a stein rigidly connected with the cylinder, a collar on the stem having an eccentric cam engaged with the bolt and operablel to move the bolt endwise movable locking bolt, a key operable lock Polt'- 8; In a lock o! the character described, a member bored to provide)a lock housing, a locking bolt movably mounted in said member, a lock cylinder rotatable and longitudinally movable in said bore, and a connection between the lock cylinder and the boit` comprising a stem rigidly connected with the cylinder, a part mounted on the stein locking bolt so that rotation of the cylinder and stem transmits axial motion to the locking bolt, a irangible connection between said part and the stem, and said part being held against inwardxendwise movement with respect to .the housing member independently of the stem so that upon the application ot a percussive force on the end of the cylinder said frangible connection is broken and the connection between the cylinder and locking bolt is rendered incapable o1' transmitting motion from the former to the latter.

9. In combination, a lock housing, a locking bolt slidable in the housing, a key operable lock cylinder in the housing for actuating the bolt, a part carried by the cylinder and operable upon inward endwise motion of the cylinder to secure the locking bolt against actuation, and means to normally prevent such inward endwise motion oi? the cylinder comprising a collar on said cylinder part rmly held against movement in an inward axial direction with respect to the cylinder, and irangible means securing said collar to the cylinder part, said frangible means being adapted to give way under a percussive force applied to the cylinder whereupon said cylinder part is shifted inwardly into operative engagement with the locking bolt. f

10. In combination, a lock housing, a locking bolt sli'dable in the housing, a key operable lock cylinder in the housing for actuating the bolt, a part carried by the cylinder and operable upon inward endwise motion of the Vcylinderto secure the locking bolt against actuation, and means to normally prevent such inward endwise motion of the cylinder comprising a collar on said cylinder part firmly held against movement in an inward axial direction with respect to the cylinder, frangible means securing said collar to the cylinder part, said frangible means being adapted to give way under a percussive force applied to the cylinder whereupon said cylinder part is shifted inwardlyV into operative engagement with the locking bolt, and means on the collating rotation of the cylinder into siding movement of the locking bolt. y

11. In a lock, a member forming a lock housing, a key, operable lock cylinder mounted thereylar and engaged with the locking bolt for vtransin, a locking bolt movable in said member and operable by the cylinder, said locking bolt having a recess, cam means driven by the cylinder and engaged in said recess for actuating the bolt, and a part rigidly connected with the cylinder and projectable into said locking bolt recess upon inward endwise movement of the cylinder to secure the bolt against actuation.

' 12. In a lock, a member forming a lock housing, a key operable lock cylinder mounted therein, a locking bolt movable in said member and operable by the cylinder, said locking bolt' having a recess, cam means driven kby the cylinder and yengaged in said recess for actuating the bolt, and

apart rigidly connected with the cylinder and projectable into said locking bolt recess upon inward endwise movement of the cylinder to secure the bolt against actuation, and means to prevent inward endwise motion of the cylinder including a frangible part adapted to give way under a percussive force applied to the cylinder.

13. In combination with a door handleficr actuating a door latching mechanism, a locking bolt slidably mounted in the handle and projectable to a position affording a driving connection between the handle andthe mechanism to be actuated, a key operable lock cylinder mounted in the handle, and a driving. connection between said cylinder and bolt whereby rotation of the cylinder moves the locking bolt to and from its operative position, said connection including a' frangible part adapted to give way' and disable saidr connection between the cylinder and the bolt.

' JOHN W. FITZ GERALD. v

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