US2983132A

US2983132A - Security device

Info

Publication number: US2983132A
Authority: US
Inventors: Myron P Falk
Original assignee: Independent Lock Co
Current assignee: Independent Lock Co
Priority date: 1959-04-22
Filing date: 1959-04-22
Publication date: 1961-05-09
Anticipated expiration: 1978-05-09

Description

May 9, 1961 p, FALK 2,983,132

SECURITY DEVICE Filed April 22, 1959 2 Sheets-Sheet 1 INVENT MYRON P. LK

BY WM 5%,

ATTORNEY M. P. FALK SECURITY DEVICE May 9, 1961 Filed Ap ri1 22. 1959 2. Sheets-Sheet 2 INVENTDR MYRON P. FALK hw/ ATTORNEY FIG] FIG.6

United States Patent-- SECURITY DEVICE Filed Apr. 22, 1959, Ser. No. 808,165

2 Claims. (CI. 70-49) This invention relates to a security device 'and more particularly to a portable locking mechanism adapted to 2,983,132 Patented May 9, 1961 hub 16 a distance somewhat less than the diameter of the ball links B, but greater than the diameter of the cylindrical linking portions L between the balls B.

The rotatable plug 11 is provided with a generally rectangularly cross-sectioned drive bar 19 which extends through the aperture 20 formed in the hub 16 of the casing 12. An end plate 21, of substantially circular configuration, is 'eccentrically provided with a rectangular slot; 22, substantially conforming with the rectangular cross-section of the drive bar 19. A pair of

shoulders

23 and 24 on the drive bar overlay portions of the end plate 21 surrounding the slot 22, thereby preventing endwise prevent theft or removal of normally portable items.

Still more particularly, this invention relates to a chain locking device whereby a loop orbight formed of the chain may be locked into the chain and, thereby, articles encompased within the loop or light may be assured against separation.

Portable removable articles such as skis, lawnmowers, bicycles or the like are often left out of doors for short periods of time and thus become easy articles for thefts. It is an object of this invention to providea locking deremoval of the end plate 21 from the said drive bar.

' In the embodiment depicted in Figures 1 to 3, one end B of the chain C is secured to the drive bar 19. A convenient means of atfixing the end of the chain to the drive bar is illustrated in Figure 1, wherein the end part of the bar 19 is bifurcated by forming the same with the slot at 25, such slot serving to receive a link portion L of the chain, the

ends

26, 27 of the bifurcated bar, after insertion of the chain, being bent inwardly to prevent removal of the chain and welded, as illustrated at 28, to assure a vice for a chain whereby such chain may be encircled about the object to be protected, and about a stationary object, thereby effectively securing the portable object to the stationary object and preventing the theft thereof.

It is a further object of this invention to provide a. portable chain locking device which is extremely economical to produce and which may be used without alteration to protect a wide variety of articles against theft.

Still a further object of this invention is to provide a locking device of the class described whereby a plurality of loops or bights may be formed of the chain, thereby permitting the locking or securing of a plurality of articles, with the same locking mechanism at the same time.

To attainthese objects and such further objects as may appear herein or be hereinafter pointed out, reference is made to the drawings, forming a part hereof, in which:

Figure l is a magnified vertical section through a locking device in accordance with the invention;

L'Figure 2 is an end elevationalview of the device in the chain releasing position thereof;

Figure 3 is a view similar to Figure 2, showing the chain in the locked position thereof;

Figure 4 is a view similar to the views of Figures 2 and 3 of an embodiment of the invention;

Figure 5 is an exploded perspective view of an embodiment of this invention;

Figure 6 is a section taken on the line 66 of Figure 5;

Figure 7 is an end elevation, partly in phantom, of the embodiment of Figure 5 in the unlocked position;

Figure 8 is a view similar to that of Figure 7 but in the locked position.

In accordance with the invention, a locking assembly 10 which is, in the illustrated embodiments, of the disk tumbler type but which may be, without variation from the spirit of the invention, of any known type, such as the pin tumbler type, is provided with a key rotatable plug 11, secured within an armoured housing 12. The plug, in the usual manner, provides an exposed keyway 13, wherein may be inserted the operating key 14.

At the end 15 of the casing 12 opposed to the keyway end 13, there is provided a cylindrical hub 16 extending beyond the end 15 a distance slightly in excess of the diameter of the ball link portions B of the chain C. The end 15 of the casing is formed, in addition, with a toothed member 17 of generally pyramidal form, the apex 18 of the tooth being spaced from the outer periphery of the serted orientation, the relatively narrow link portion L will lie between the apex of the tooth 17 and the hub, 18 and 16, respectively, and a. pair of ball link portions B will lie one to each side of the tooth 17. It will be readily recognized that in the thus inserted position of the chain,

movement of the chain aong its length is prevented by the drive bar 19 to the position shown in Figure 3 where,-

in the chain portion-imprisoned between the tooth 17 and h'ub'16 will liebeneath the end plate, thereby preventing endwise as well as sidewise removal of the chain from the casmg.

As will be obvious from Figure 3, any article A imprisoned within the loop or bight of the chain defined by the fixed end B and the portion confined between the tooth 17 and hub 16 cannot be moved except within the limits provided by the length of chain forming the bight or loop. If a stationary object, such as a tree or stanchion, is included within this loop, the article can be removed from the tree or stanchion only by operating the key plug 11 by means of the proper key 14, thereby swinging the end plate 21 to the position shown-in Figure 2.

In the embodiment shown in Figure 4, a central hub 16' and a pair of toothed members 17' are provided on the end surface 15' of the casing 12'. In this embodiment; the end plate 21 is provided with -a pair of

opposed wings

30, 31, which wings, in the locked position of the plug, occupy the dotted line position shown in Figure 4, thereby overlying the space between the teeth 17 and the hub 16. In this embodiment, permanent fastening of the chain to any portion of the lock assembly is not necessary since a lock, bight or loop or chain will be formed between the portions of the chain imprisoned between the teeth 17' and the hub 16 in the locked position of the plug. If it is desired to provide a plurality of locked loops or bights of chain, one end of such chain may be permanently secured or fastened to the casing 12', in which case a first locked loop or bight will be defined between the mate relation ,to the central hub in the manner illustrated in Figure 4 and by providing the end cap with a plurality of wings to match the number of teeth provided. I

In the embodiment of Figures 5 to 8, an end E? of the chain C" is permanently afiixed to the assembly The end "v of the casing 12" is provide'd,.ir1 addition to the central hub 16" having teeth 16d and 16b, with a pair of inwardly directed opposing toothed members 17a and 17b, spacedabout 120 apart aboutthe periphery of the casing. The casing end- 1 5" is provided, in addi tion, with an upstanding stop member SS which extends from the end 15" a distance greater than the toothed portions 17:: and 17b. p

In this embodiment, the end plate 21" is secured to the drive bar 19" by staking or otherwise, and presents an angular segment somewhat greater than the angle \of separation of the'teeth 17a and 17b;

As shown in Figures 7 and 8, the end platen" is secured to the bar '19" in a manner to overlie tooth 17a in both the opened and closed positions'of the lock (the end E" being inserted between tooth 17a and hub tooth 16a prior to staking the plate 21" to the said bar 19"). The stop or abutment member 35 blocks end plate 21' from opening far enough to release end E". As in the prior embodiments, the chain C" may be looped about the objects to be locked and inserted while the end plate 21" is in the position shown in Figure 7, between the tooth 17b and the hub tooth 16b, whereupon the end plate 21" may be shifted to the position of Figure 8 by rotating the key. V

The heretofore described chain locking device provides a versatile and portable means for preventing theft of a wide variety of articles. The length of chainsupplied with the device may be varied commensurate with the size of the article to be secured and the availability of trees, stanchions and like substantially immovable'objects. The theft of portable articles may be discouraged even Having thus described the invention and illustrated its use, what is claimed as new and is desired to be secured by Letters Patent is:

1. A chain locking devicecomprising a generally cylindrical housing, a key plug rotatably mounted in said housing with the key receiving end of said plug extending to one side of said housing :and a connector bar extending beyond the other side, a chain member secured to said housing, said chain member including ball links and wire links, a bosson said other side of said housing surrounding said connector bar, a tooth member formed on said other side of saidhousing, said tooth member having an apex portion directed toward said boss and spaced therefrom a distance greater than the width of said wire links and less than the width of said ball links, and an end plate carried by said connector bar, said plate, in the locked position of said plug, overlying said eboss and toothed where no stanchion is available by connecting together a plurality of such articles by the device, thereby rendering transportation of the connected articles inconvenient or suspicious in appearance. I a

member.

2. A chain locking device comprising a'gene'rally cylin drical housing, a key'plug rotatably mounted in said housing with the key receiving end of said plug extending to one side of said housing and 'a-connector bar extending beyond the other side of said housing, a boss on said other side of said housing surrounding said connector bar, first and second tooth members formed on said other side of said housing, each of said tooth members having an apex portion directed toward said boss and spaced therefrom, an end plate carried" by said connector bar and rotatable therewith, said end plate, in the locked position of said plug, overlying both said toothed members, 'a stop member extending from said other-side of said housing in the path of rotation of said plate, said plate, when rotated against said stop member, overlying said first tooth mem her but not said second tooth member,- and a chain com prising ball links and wire links disposed between said first toothed member and said boss, with; one said ball link to either side of said first tooth member.

References Cited in the file of this patent UNITED STATES PATENTS 1,390,402 J Vincent Sept 13, 1921 1,689,437 Hurd ocean, 1928 1,814,356 Wise July 14, 1931 FOREIGN PATENTS 812,771