US2934929A - Padlock - Google Patents

Description

May 3, 1960 I E. MANCUSO 2,934,929

PADLOCK Filed Oct. 24, 1958 INVENTOR, 80 I1ANUEL NANCUSO;

ATTORNEY 7 PADLOCK Emanuel Mancuso, Burbank, Calif.

Application October 24, 1958, Serial No. 769,486

1 Claim. (Cl. 70-32) The present invention relates to improvements in padlocks, and has for an object a padlock incorporating improved mechanism for the actuation of a locking bolt.

A further object is the provision in a padlock of mechanism which is easily fabricated, positive in its operation, inexpensive in cost of manufacture, and superior to mechanisms now known to the inventor.

Other objects of the invention include simplicity of construction, a reduction in parts, locking mechanism which is easily repairedin case of breakage or other manfunction, which will only require semi-skilled labor for its fabrication, and is substantially tamper-proof.

With the above mentioned and other objects in view, the invention consists in the novel and useful provision, formation, construction, association, and relative arrangement of parts, members and features, all as shown in one embodiment in the accompanying drawing, described generally, and more particularly pointed out in the claim.

In the drawing:

Figure 1 is a front elevation of the padlock,

Figure 2 is a side elevation of the padlock shown in Figure l, and looking to the left of said figure,

Figure 3 is a sectional view on an enlarged scale, taken on the line 3--3 of Figure 2,

Figure 4 is a view similar to that of Figure 3, certain parts being in changed relationship,

Figure 5 is a fragmentary, sectional view on the line 55 of Figure 3,

Figure 6 is a sectional view on the line 6-6 of Figure 3, a cooperating hasp being shown in dotted lines, and,

Fig. 7 is a perspective view of the leaf-type spring which serves as a locking means.

Referring now to the drawing, I contemplate incorporating in the improved padlock, a tumbler type locking mechanism, the barrel of which is shown in Figure 5,, at 1, for receiving a key 2. The casing or housing 3 is preferably formed from heavy steel which may be alloyed so as to make it durable, and the rear wall or base 4 of said casing or housing is recessed so as to accommodate various mechanisms entering into the lock structure. Thus, referring to Figures 3 and 4, the casing is transversely routed at 4 to provide a staple receiving recess in the manner shown in Figure 6. In Figure 6, the U- shaped staple 5 is secured at its ends to a base plate 6 of a hasp, which base plate is usually secured to a door frame, while a tongue 7 is hinged to a tab which is fastened to the door framing, the tongue being provided with a transverse slot 8 through which the hasp 5 is passed. Thus, in the showing of Figure 6, when the staple has been passed through the slot 8 of the tongue, the padlock may be applied to the staple, the staple being received within the staple receiving recess 4 The barrel 1 is held securely to the casing or housing within the bore for said barrel by providing shoulder portions at '9 and 10 for receiving flange portions on the barrel to thereby lock the barrel to the casing against removal. The base or rear surface 4 of the housing or casing is routed, as shown in Figures 3 and 4, at 11. The routing tates Patent I "ice is such as to provide a flat surfaced base wall 12, a straight side wall 13 which extends longitudinally of the casing, and with reference to direction, we assume that the casing is substantially rectangular in form, although the ends are curved, the straight side wall 13 joining with an end wall 14 substantially at right angles to the wall 13, which wall, in turn, joins with a curved end wall 15, with a straight wall at 16, which substantially parallels wall 14. Wall 16 is of short length. A curved wall, of substantially a semi-circumference 17, joins wall 16, the wall terminating at 18 where it joins wall 19 which is spaced from and parallels wall 13. Wall 20 substantially parallels the wall 14 and joins with the wall 21, paralleling the wall 13, wall 21 then merging with a curved end wall 22, which joins wall 13. I have detailed the character of these walls as they receive lock mechanism and perform a function in the practice of the invention.

The casing is transversely bored inwardly from one side wall 23, as shown at 24 and 25 the bore 25 communicating with the staple receiving recess 4*. The casing is also bored transversely between the front wall of the casing and the rear wall 4 thereof to accommodate the barrel 1 and the curved wall 17, in part spacedly surrounds the inner end of the said barrel.

Adapted to be received within the bores 24 and 25, and for movement therein, is a locking bolt designated generally as 30. This locking bolt is of a length which permits its ejection in part from side wall 23 of the casing or housing, in one position, and to be substantially positioned within said casing or housing in a second position, as see Figures 3 and 4. The locking bolt has uniform diameter portions 31 and 32 with an intermediate portion 33, of reduced diameter, thus providing annular end shoulders 34 and 35. The portion 32 is of shorter length than portion 33, and portion 32 is accommodated within the bore 25, while portion 31 is accommodated within the bore 24. Within the confine included between the curved end wall 22 and walls 13 and 21 is a stud 28 provided with an end kerf 36. This stud may be secured within the routed portion 11 of the casing or housing by providing a screw-threaded bore in the housing for said stud, or by otherwise securing the stud. A spring,

designated generally as 37, is coiled about the said stud,

as shown in Figure 5, at 38, with a diametric end piece of said spring received within the kerf, as shown at 39. The opposite end of the spring is elongated and curved,- as shown in Figure 5, at 40. This curved end of the spring embraces the locking bolt within the reduced diameter portion 33 thereof, as shown in Figures 3, 4 and 5. The arrangement is such that the curved end 40 always tends to revolve clockwise or from the position shown in Figure 3 to that of Figure 4, with the intent of moving the locking bolt to an open position, that is, wherein the bolt portion 32 does not bridge the staple receiving recess 4, it being noted that the end of portion 32 abuts the wall bounding the staple receiving recess when the bolt is 7 shot.

erally as 60 for locking and unlocking the bolt 31.-- "This Portion 6.4 terminates in a curved or looped portion 65 joining a straight portion 66 which is substantially at right angles to arms 62 and 64. Portion 66 joins a portion 67 which is substantially at right angles to portion 66. This portion is of short length and is substantially parallel to portions 62 and 64 when the spring is unstressed. Portion 67 merges with part 68 at right angles to portion 67 and extends upwardly for a certain distance where it joins with a curved portion 69 and a downwardly extending portion 70, terminating in a straight portion 71, which is substantially parallel to portion 68. From the shape of the spring, it will be evident why the routed portion 11 is formed, as has been previously described. End 61 fits against the curved end portion 72, while the arm 62 bears against the wall 14, the curved end of the spring 63 fits within the curved wall portion 15, and the arm 64 bears against the wall 16. The curved portion 65 of the spring bears against the wall 13, as shown in Figures 3 and 4, and in so doing, assures that the portions 62, 63 and 64 will remain in the routed portion. The ledge formed by the angularly related walls 66 and 67 is for nose 53 engagement. Portion 66 bears against the wall 13, while end portion 71 bears against wall 19, and thus holds the spring in position between these two walls. Thus, when the cam 50 is rotated from, say, the position of Figure 3, to that of Figure 4, the nose 53 engages spring portion 67 to move the spring downwardly. Portions 66 and 67 slide between and are guided by the walls 13 and 19, while the spring arms 62 and 64 tend to approach at their outer ends, bending occurring at th'e'looped or curved end portion 15. The curved end at 69, with its downwardly inclined portion at 76,,is fairly abrupt and is adapted to be received in one position between the shoulders 34 and 35 and with the reduced diameter portion 33 of the locking bolt. This abrupt bend is such as to act as a locking nose for the locking bolt and to engage the flanged end 35 with sufiicient pressure to prevent dislodgement of said locking nose portion of the spring from the locking bolt.

The operation, uses and advantages of the invention just described, are as follows:

Normally, the bolt and its associated mechanism will have the appearance shown in Figure 4, that is to say, the locking bolt end 31 will be projecting from the side of the said casing or housing, which permits a staple to enter the staple receiving recess 4*. The mechanism as shownin Figures 3 and 4, in the completed lock, is covered by a back plate 80, which back plate carries a hook member 81, so that the bolt may be hooked to the staple, if desired, or to a nail or other object when the padlock is not being used.

Assuming, however, that all parts have been assembled and that the padlock has the appearance shown in Fig-' ures l and 2, the tongue of the hasp may be swung so that the staple passes through slot 8, whereupon the padlock may be secured to the staple, the staple being received within the staple receiving recess 4*, as shown in Figure 6. It will benoted that the base plate 80 is con-' tiguous to the tongue 7 of the hasp, and that the curved end of the staple encircles the locking bolt end 32. The

locking bolt is shot by the operator pushing inwardly upon the end of the locking bolt, and specifically the portion 31, so that the locking bolt is moved from the position of Figure 4 to that of Figure 3 under counter force of spring 37, the loop end of the spring engaging the flange 34. When the bolt is shot, the locking nose 69 of the leaf spring moves along the periphery of portion 32 of the locking bolt, being constantly urged upwardly by the arm 64 tending to revolve counter-clockwise from the position of Figure 4 to that of Figure 3, until the locking nose 69 moves from portion 32 and is received within a reduced diameter portion 33, whereupon the arms 62 and 64 substantially parallel each other, as shown in Figure 3. In other words, the arms 62 and 64 at all times tend to separate. When a key 2 is inserted within the locking barrel, the cam 50 may be revolved from the position shown in Figure 3 to that of Figure 4, and in so doing, the cam nose 53, by its engagement with por tion 67 of the leaf spring, will move the nose portion 69 of said leaf spring from the reduced diameter portion 33 of the locking bolt to cause approach of the arms 62 and 64 of said leaf spring and the locking bolt, under spring tension of spring 37 which will move to the position shown in Figure 4 from that of Figure 3.

I have thus provided a padlock whereinthe locking mechanism for a locking bolt is also the means which is actuated when the lock barrel mechanism is rotated, and this leaf spring is an integrally fortned member, easily fabricated and which does away with the necessity of many parts now generally incorporated in padlock mechanism. Breakage of the leaf spring, while not likely to occur, still if it does occur, iseasily replaced. The other parts of the padlock are not likely to be damaged or broken.

I claim:

A padlock including: a housing formed with an elongated groove for receiving and confining a staple, said housing being routed to provide a fiat base portion and surrounding side walls; a locking bolt for movement transversely of the housing and to bridge the groove to secure the staple therein, said locking bolt'in one position externally projecting beyond the housing to release the staple from the groove; resilient means within the routed portion of the housing constantly urging said locking bolt to an externally projecting position, a tumbler type locking barrel within the housing and provided with a cam positioned in therouted portion and rotatable when the locking barrel is actuated; a leaf spring within the routed portion of the housing, the leaf spring bent to provide two arm portions and an interconnecting loop urging separation between the arm portions, one arm portion having an extension in substantially right angular relationship thereto, the extension being bent to provide aledge and a portion terminating in a bent nose; said cam provided with a nose at all times in engagement with the ledge of the leaf spring; said locking bolt formed with a reduced diameter portion providing two annular shoulders, the nose portion of the leaf spring adapted to be received in the reduced diameter portion of the bolt between the annular shoulders when the locking bolt bridges the staple receiving groove, and to engage the periphery of the locking bolt when the cam is rotated against the ledge to release the locking nose from the reduced diameter portion; the side walls bounding the routed portion of the housing being so formed as to at all times guide movement of the leaf spring when stressed'and unstressed.

References Cited in the file of this patent I 3 UNITED STATES PATENTS 506,665 Browne et a1. Oct. 17, 1893 1,835,317 Miller Dec. 8, 1931 1,942,328 Fraim Jan. 2, 1934 2,233,115 Thiele r Feb. 25, 1941 2,656,704 Mancuso Oct. 27, 1953 s FOREIGN PATENTS 944,206 France Oct. 25, 1948

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