US1938941A - Padlock - Google Patents

Description

Dec. 12, 1933. H E SOREF v 1,938,941

PADLOCK Filed May 9. 1932 INVENTOR. HARRY E.; SOREF, BY

ATTOREY.

Patented Dec. l2, 1933 UNITED STATES PATENT OFFICE Master Lock Company, Milwaukee, corporation of Wisconsin i Wis., a

Application May 9, i932. serial No. 610,075

2 Claims. (Cl.-70--108) lThis invention relates to padlocks in the con-1 struction of which a plurality of fiat metal plates of 'uniform exterior outline are superposed one upon another, andsecured together ina permanent manner, so as, to produce a lock casing or bodyV of symmetrical shape. As thus produced, the lock casing or body issubstantially a metal block of considerable weight and inherent durability, which qualities enable it to successfully resist all `ordinary attempts at its destruction. In other Words, the lock casing or body is practically indestructible. The actual solidarity of the lock casing or body thus produced, is subtracted fromv only in a minor degree, and only to the extent ,that some ofthe ilat metal plates are provided with transversely extending perforations, con,- toured for the accommodation of the locking elements, but this does not detract from Vthe value of its resident factors of weight and duraibility. l

The invention resides in a peculiar and novel construction of the parts whereby a cylinder with split-pin tumblers may be associated with the lock casing or body constructed as above'described. Novel means are employedv for securing the cylinder and the barrel in which the split-pin tumblers areguided for movement, within the lock casing `or body, so that when the parts are assembled and secured in position, a weighty, solid,

great durability is produced. Y

The constructional features of the improve padlock will now be described, and the novelty residing in the same will be pointed out in the appended claims.-

In the accompanying drawing:v

Figure 1 is a vertical, central sectional view, through its longer diameter, of av padlock constructed in accordance with my invention, with 40 ysome of the elements shown'in full lines.

Fig. 2 is a plan view onthe line 2-f-2, Fig. 41, looking at the rlock from the top, and showing the shackle in section.

Fig. 3A is a horizontal sectional view on the line i3-3 Fig. 1, in which is shown thearrangement of the spring-actuated locking bolt and the manwillbe described; andl and unitary construction of padlock of safety and split-pin tumbler, cylinder mechanism. To en- Fig. 6 is a plan view of the lock looking from the bottom of the same. Y

In the drawing, the letter A indicates the lock casing or body, B the swiveled, axially movable shackle, and C the keyfor operating the lockingl elements.

The lock casing or body VA is composed of a top plate 10, a bottom plate 1l, and a plurality of intermediate plates l2, such plates, all of the same exterior outlinabeing superposed in the 55 manner shown in Fig. 1, and permanently connected together in their assembled positions, to form a symmetrical casing or body for the padlock. Y

I have `shown each plate in the assembly as provided With a plurality `of perforations near its` border, which perforations in the several plates are in alignment` for the reception of a corresponding number of long rivets 13, headed at one end and adapted to have their points spread, when passed through the perforations in theplates. In this manner, the plates are rmly secured vto each other, to constitute a unitary structure of the lock casing or body, having the very desirable qualities of weight and solidity. For all practical purposes, the lock casing or body A, is a solid metal block, capable of resisting all' ordinary blows which would tend to damage the same. Y l

e The intermediate plates 12, are provided with other through perforations, varying in outline, which are cut out 'for theaccommodation of the locking elements. In the present construction, I am providing the padlock with a key-'operated able this resultto be attained, I. provide the intermediate plates 12 at the bottom of the assembly, .with aligned perforations substantially lof key-hole shape, as shown in Fig. 5. In the keyhole perforations, I insert the barrel D for the cylinder andthe split-pin tumblers, such barrel comprising al cylindrical portion 14, provided at one side with an axially extending wing 15, which is bored radially to receive thejseveral split-pin tumblersylyand the confined re-acting springs 1'7, which latter tend normally to expel the tumblers from `the bores of the Wing in which they are seated.

In the cylindrical; bore of the barrel D, a cylinderl is arranged. Ther said cylinder is pro- Vvided at its lower end with a circular ange 19,

The `cylinder 18V is provided upon one side with 110 a key slot, and is radially bored on its opposite side, and in line with the bores in the wing 15, to receive the split-pin tumblers 16, when reacted upon by the confined springs 17. Near its upper end, the cylinder 18, is provided with a circumferential groove 20, in which a split-ring 21, is adapted to be sprung. The split-ring 21 projects slightly beyond the periphery of the cylinder 18, and rests upon the upper end of the barrel D, and thus the split-ring 21, completes the axial registry of the cylinder 18 in the barrel. The intermediate plate 12, next above and resting upon the upper end of the barrel D, is provided with a central perforation, slightly larger in diameter than the over-all diameter of the split-ring 21, so that the latter may have suflicient clearance to enable it to rotate freely with the cylinder, at the times that'the latter is turned by the key C. The engagement of the wing 15 in the key-hole slots in the lower group of intermediate plates 12, holds the barrel D against rotation, when the key is turned. The split-ring 21 is in effect a circumferential flange or collar on the cylinder.

The post 22 of the shackle B, is seated in a well formed by providing all of the plates except the lower one, the plate 11, with aligned perforations, and a socket for the hooked or keeper end 23 of the shackle, is provided by perforating in like manner a suiiicient number of the plates at the upper side of the lockcasing.

The intermediate plate 12 next overlying the split-ring 21, is provided with an enlarged and elongated central opening as shown in Fig. 4,

ffor the reception of the locking plate 24. The

plate 24 is provided with an elliptical opening, also shown in Fig. 4, to permit movement transversely of the cylinder, to final position, in which it will act to retain the shackle in the lock casing,

`and prevent its Withdrawal, as will later be described. v

The upper end of the cylinder 18 is cutaway for a part of its diameter, so as to leave a longitudinal extension 25 having a vertically standing Ilat face. The intermediate plate 12 associated therewith, is provided with a circular opening having the diameter of the cylinder, in which opening the said extension is entered. But the continuity of such opening is interrupted by an angular projection 26 on the plate 12, having its tapering sides converging at a point in the axial line of the cylinder. The sides of the angular projection are shown as standing at 90 apart.

The flat face of the extension 25 of the cylinder-v 18, pivots about the point of convergence of Athe tapering sides of the angular projection, and such tapering sides serve'as stops to limit the rotation of the cylinder through an arc of 45 in either direction. from its normal position.

The intermediate plas 12 next above the one just described, are cut out centrally so as to provide a parallel sided channel for guiding the sliding bolt 27, in its forward Aand. backward movements. At its rear end, the left end, viewing '.Figs. 1 and 3, the bolt 27 is provided with a depending lug 28, the inner transverse vertical face of which is adapted to normally engage the parallel, similarly disposed face of theextension 25, at the upper end of the cylinder 18.

An expanding spring 29, of which a conventional form is shown in Figs. 1 and 3, bears against the rear side of the lug 28, and acts normally to urge the bolt forward to engage the front end thereof inthe keeper-notch ofthe hooked end 23 vof the shackler B. The topmost intermediate plate 12, confines the bolt to its channel, and the top plate 10, completes the assembly of the casing or body of the padlock.

It will be seen from Figs. 1, 4 and 5, that the inner side of the post 22 of the shackle B, is flattened for a part of its length, and that the said post is provided with a circumferential groove 30, near its lower end. The central perforation in the bottom plate 11, for insertion of the key, is of less diameter than the cylindrical portion 14 of the barrel D, by which means the barrel and its lateral wing 15 are retained in position in the lock casing.

In assembling the parts, the bottom plate 11 is rst laid. The cylinder and barrel unit is then positioned thereon, with the split-ring 21 snapped into theA groove in the cylinder near its upper end.

'An appropriate number of plates 12 provided with key-hole slots, as shown in Fig. 5, are then stacked in succession about the barrel until the top of the latter is reached. The plate with the elongated slot, as shown in Fig. 4, is then positioned, and the holding plate 24 laid into the slot. This will be followed by placing an intermediate Vplate 12, acting as a spacer, and without other function, except to serve as a bearing in which the upper end of the cylinder 18 may turn, and as a guide for the post 22`of the shackle. Then the plates which are cut out for the accommodation-of the bolt and its actuating spring are placed, followed by the positioning of the bolt and spring in the cavity thus formed. The topmost intermediate plate 12, and the top plate 10, are then applied in succession.` The points of'fthe rivets are then spread, vand the lock casing or body is produced as a substantially solid, unitary structure.

The post of the shackle-22 is bored from its lower end for the reception of an expanding spring 31, preferably encircling a guiding pin 32. The said spring and pin being placed in the bore, the end of the post is inserted in the well, until the circumferential groove 30 at the lower end of the post, is in the plane of the holding'plate 24. The latter is then moved until its squared';

end 32 enters the said groove. The sliding movement of the plate 24, exposes a small hole in continuation of the socket for the end 23 of the shackle, and the saidl hole is then filled by driving a nail 33 therein, to hold the plate 24 in its nal,

fixed position. y

yThe flat portion of the post and the section defined by the circumferential groove 30, are of the same radius, so that the squared end32 of the holding plate 24, may pass leasilyfrom one to the other. The nail 33 also bearsagainst the cap 34, covering the radial bores in the wing 15 ofthe barrel D.

After the nail 33 has been driven into position,

the end 23 of the shackle is aligned with the re'- ceiving socket, and the shackle is then pushed home. Thereafter, it can be released only by a proper key, which will align the vsplitsy of the pin tumblers, so that the cylinder may be rotated to withdraw the bolt 27. In turning the cylinder, the lug 28 of the bolt is pushed upon by the offset portion V25 of the cylinder, against the4 opposition of the spring 29, to withdraw the bolt, and free .the shackle to the spring 31.

Having thus described my invention, WhatI- claim and desire to secure by Letters Patent of the United States, is:`

1. In a padlock, a plurality ofv laminated plates attached togetherto constitute a casing, a cylinejecting action of the 1 der mounted in an opening therein, a longitudinal extension on said cylinder cut away for a part of its diameter to present a flat vertical face normally disposed transversely of said casing, a spring-actuated sliding bolt, a lug depending from said bolt normally ush against said extension face, an intermediate plate in said casing provided with a substantially circular opening, and an angular projection of said plate Within said opening adapted to limit the rotation of said cylinder in either direction by contact of said face with either edge of said projection.

2. In a padlock, a casing, a cylinder mounted therein, a longitudinal extension on said cylinder y cut away for a part of its diameter to present a flat vertical face normally disposed transversely of said casing, a spring-actuated sliding bolt, a lug depending from said bolt normally iiush against said extension face, an intermediate -plate in said casing provided with a substantially

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