US404161A - brown - Google Patents

Description

C. 'I'. BROWN. LOCK 1100K.

ylatented May 28, 1889.

C NITED STATES PATENT OFFICE.

CHARLES T. BROWTN, OF CHICAGO, ILLINOIS, ASSIGNOR TO FLORA L. BROWN, OF SAME PLACE.

LO C K -v H O O K SPECIFICATION forming' part 0f Letters Patent NO. 404,161, dated May 28, 1889.

Application filed February 8, 1838. Renewed March 18, 188th Serial No. 303,823. (Model.)

T LZZ whom it may concern:

Be it known that I, CHARLES T. BROWN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Hook-Catchesot which the following is a specification.

The invention relates to an automatic locking device adapted to catch and retain a hook Io upon the stud or post which it detachably engages, the catch and hook together constituting what may be termed an automatic lockhook.

The locking device consists of two disks ro- I5 tatively mounted on a postor stud, each disk having a lug or ear thereon, the one ear yieldingly held opposite the other by a spring which is placed between the disks. In closing the hook upon the stud one ear is carried 2o forward by engagement with the heel of the hook, and the other ear is carried by the spring to a position back of the hook as soon as the latter is closed upon the stud7 thus locking the hook against accidental detachment.

2 5 In the construction illustrated in the accompanyin g drawings, showin g a practicable form of my invention, this spring is retained in annular grooves in the disks.

The hook entering into the device performs 3o the same work in the same way as an ordinary hook; but it is slightly changed in forln on that part thereof which may be termed the heel, and which, in the engaging of the hook upon its stud, actuates the locking device.

3 5 Figure l is a plan view of the hook and of the locking device forming the catchwhich retains the hook upon its stud. Fig. 2 is a cross-section of the hook and of the locking device on line 2 2 of Fig. l. Fig. 3 is a plan 4o view of the lower plate or disk forming a part of the locking device and of the base to which the hook is pivoted. Fig. 4 is a plan view of the under sideof the upper disk forming a part of the locking device and of the under side of the pivoted end of the hook.

Like parts are designated by like letters of reference throughout the several views.

X is the base on which are mounted the disks constituting the locking device for the 5o hook.

X is the base to which the hook is pivoted.

A is the hook, and a is t-he post on which it is pivoted.

e is the curved end of the hook. e is the heel, and a" is the bottom of the notch of the hook.

B is the lower disk of the locking device, having a central opening by which it is rotatively mounted on the post C.

B is the upper disk of the locking device, 6o having a central opening by which it also is mounted on the post C. The post C is rigidly secured in the base X, and has a head which retains the disks thereon. This post C forms the stud which the hook engages. 65

Z) is the lug or ear on the disk B, and b is the lug or ear on the disk B.

b is a hub on the disk B extending upward to the head of the post C. This hub b is not, however, a necessary feature inthe 7o disk, as the post C from the head thereof to the upper face of the disk may be of about the diameter of the hub b, and the shoulder thereby formed on the post will serve to maintain the disks in proper position.

D is the spring placed bet-Ween the two disks in the annular coincident grooves E E.

In the annular groove E there is placed the stop e, having, as shown, an opening or way through it, and in the groove E there is a 8o stop, c, adapted to pass through the opening in stop e when the disks are mounted in place on the post C. lVhen the stop e is in the opening in stop e, the ears b b are opposite each other, and the spring D will then press S5 against each side of stops c e. In 'engaging the hook with its stud or post C the heel a of the hook comes in contact with one or the other of the ears b b. In Fig. l the hook is illustrated in full lines, with the heel thereof 9o in contact with the ear b. By forcing the hook down upon its stud the ear b and the' disk B, of which the ear is an integral part, rotates in the direction indicated by the arrow thereon and into the position indicated by the dotted ear 5 between the point and the heel of the hook. The ear b is prevented from rotating in unison with the ear b by the rounded end c of the hook until the bottom of the notch a" is nearly o r quite in contact Ioo with the stud, and when the hook is thus in engagement with the stud the spring D, compressed by the turning of the disk l-, turns the disk 3 into a posit-ion back of the hookbow, as illustrated by the dotted ear lettered 11". The ear 71, standing between the point a of the hook and the heel a thereof, is held firmly in its position by such point and heel, and the opposite ear is yieldingly held by the force of the spring l) in position back of the bow of the hook, where it forms a lock, holding the hook on its stud.

The hook A may be mounted on a pivot in the ordinary way; but in the smaller sizes of the structure embodying the invention I prefer to mount it upon the pivot e, and to pro- Vvide a spring, D', engaging with thehook and willi the base or pivot, so that. when the hook is not locked upon its stud the spring D will retract it and hold. it retracted.

In Figs. 2 and 3 of the drawings an annu lar groove, az, in the base at', suitable for inelosng a spring, is illustrated with a stop, m", therein. The spring I) is placed in the groove .11. lVhen the stop A is against stop w", the hook A is at right angles to theposition it occupies when engaged with its stud (l, and the tendency of the spring D to rctain it in this position. lVhen the hook is brought forward and engaged on its stud, the spring is compressed, and has a tendency to retract the hook from the stud, whereon it is held by the locking device.

'.lo release the hook from engagement with the stud the disk 3 is turned around by the hand until the ear l1 thereon is at the side of the curved end a of the hook and in its original position, whereupon the hook will be retracted by the spring l). The retraction of the hook may be aided by the tendency of disk l; to rotate into position with the ear Z) omjiosite the ear l1.

In the device when constructed as described the disks turn freely on post (l when the hook is not engaged with such post, and hence either ear may be rotated by the heel a of the hook coming in Contact therewith as the hook is pressed into engagement with the stud. \Vhen the heel ot' thehook rotates b and disk l', the stop e passes out from the opening or way in stop e at the other side from which it passes out of su eh opening when the ear b is rotated by the hook, as last described, and compresses the spring I) from the other end thereof.

If the stop e be placed out of line with the opening in stop e, it of course cannot pass through such slot, and in such case the heel a of the hook will necessarily act-nate one only of the ears l) 1). I prefer, when the stop e is so placed, that' the ear h on the under disk, l, shall be that one which will pass around the head ol' the hook to the backv thereof, and the ear b will then be the one actuated by the heel n, of the hook. The stop X" is then provided onv the base X to prevent complete rotation of the lockingdisks.

I also prefer at times to place the disks B .5 with the ears l) l1 directed toward the base, so that the ears shall be between the disks and the base. The hook A in that case engages its stud between the locking-disks and the base X. -r1`he construction of the two disks so placed may be identical with that hereinbefore described. lVhen the lockingdisks are thus placed on the post C, it will be preferable to place the retracting-spring D (if employed) outside, and to put a stationary cap over the pivoted end of the hook, said cap having therein the groove m to receive the spring. In either of the two ways described of placing the locking-disks upon the post or stud C, when the stop e is located out of line with the opening in stop e, a spiral spring having coils ol' larger diameter than the one illustrated in Fig. 2 and of the same diameter as the ring formed by the annular grooves E E around the post e, may be used, being so placed in the grooves that one ond thereof is engaged with stop c and the other end with stop e.

I do not wish to be restricted to the particulardetails above set forth, inasmuch as various changes can obviously be madewithout departing from the 1 )rineiple of the invention; but as a special construction the arrangement of the disks with their ears directed inwardly toward the base forms the subject of another application for Letters Patent, Serial No. 023,651, Afiled of even date herewith.

IIaVin g thus described my invention, whatI claim, and desire to secure by Letters Patent, 1s

l. A locking device for a hook, consisting of a post, two disks rotatively mounted on the post, an ear on each of the disks extending into the plane of the hook, and a spring engaging the disks and yieldingly holding the ears substantially opposite each other, substantially as described.

2. A locking device for a hook, consisting of a post, two disks rotatively mounted on the post, an ear on each of the disks extend ing into the plane of the hook, and a spring engaging the disks and yieldingly holding the ears substantially opposite each other, in combination with a pivoted hook and a spring arranged to retract the hook. from the post when released from the locking device, substantiall y as described.

(ffl [ARLES '.l. BROWN.

FLoim L. lnowN, Maui-ner. l). Tun).

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