Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS475037 A
Publication typeGrant
Publication dateMay 17, 1892
Filing dateJan 30, 1892
Publication numberUS 475037 A, US 475037A, US-A-475037, US475037 A, US475037A
InventorsFrederick P. Cobham
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Half to fred e
US 475037 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

(No Model.) 2 Sheets-Sheet 1.


No. 475,037. Patent-ed May 17, .1892.

o y v 72 o llmmllflv l 6/ I MAMQQQMM www 2 Sheets-Sheet 2.


' I'. P. COBHAM.

' BAG 1.00K. y

No. 475,037. Patented May 17, 1892-. Y

ff W

www@ uw 'Lr- Num y? Afyy/ i UNITED STATES PATENT OFFICE.



SPECIFICATION forming part of Letters Patent No. 475,037, dated May 17, 1892. Application tiled January 30, 1892. Serial No; 419,731. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK P. OOBHAM, a citizen of the United States, residing atWarren, in the county of Varren and State of Pennsylvania, have invented certain new and useful Improvements in Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to locks; and it consists of certain useful and novel improvements in the same, fully disclosed in the speciiication following and in the drawings filed herewith, and more particularly pointed out in the claims.

In the drawings, Figure l is a partial perspective view of a mail-bag provided with my improved lock. Figs. 2 and 3 represent the side plates. Fig. 4 is a view showing the plates and frame combined and the catch inserted. Fig. 5 is a sectional view of Fig. 4. Figs. 6 and '7 are views of the interior mechanism with the side plates removed. Fig. 8 is a perspective view of the bolt. Figs. 9, lO, and ll are end views of the barrel. Fig. l2 is a side view of the key; and Fig. 13 is a partial side View with the frame removed, showing the barrel secured between the plates with the key inserted.

Similar letters of reference indicate identical parts throughout.

, My improved lock consists of a main frame A, preferably rectangular in shape and provided with suitable recesses, as hereinafter described, to permit the insertion and operation of the locking devices, which constitute parts of my invention. Side plates B C, adapted to be rigidly secured to the frame A, are provided, having annular openings a, to receive the barrel D of the lock, which is adapted to turn with the key in said openings in the operation of locking and unlocking. The plate B is provided with a slot a to permit the passage through it ot' the key. The plates are also provided with openings b to admit the catch E.

Within the frame Aand between the plates B C is placed the sliding bolt F, adapted to engage the catch E when the latter is inserted through the openings b. The bolt is made substantially as shown in Fig. 5 of the drawings, and is preferably reduced at a portion ot' its length to admit of its free passage past the mechanism upon either side of it and to facilitate the adjustment of the parts,I and has a rounded or inclined portion f5, adaptedl to engage the catch E. The rear portion of the bolt F is provided with a suitable shoulder to be engaged by the ward of the key in the operation of withdrawing or retracting the boltv and with a lug or pin i. The bolt is adapted to be held in the position shown in the drawings by means of a spring, as f3. d

The' barrel D is made substantially as shown in Fig. 13, and consists of a cylindrical part provided with reduced portions d6, fitting in the openings d of the plates B C, and which are adapted to rotate in said openings. The barrel is also provided with a longitudinal slot f8, through which the key passes, and with an annular groove d, in which the arms g g2 of the tumbler G are adapted to travel', as hereinafter described.

In order to prevent the successful use of false keys, a tumbler G is pivoted in a recess a4 in the frame A, and is provided with two arms having inward projections g g2, adapted to travel in the groove CZ of the barrel when the proper key is inserted and the barrel turned. The projection g normally engages the key-slot in the barrel D and prevents the y barrel from turning. The other projection g2 j is adapted to enter a recess d in the groove d, and is also for the purpose of holding the barrel stationary.

It is obvious that in order to'insure the adjustment of the tumbler G, so that the projections g g2 will travel in the groove d and permit the barrel D to turn, only a key which fits the lock can be used. `The tumbler G is maintained in its normal position by means of a spring fwhich is preferably made to engage the tumbler in the recess g. The other end of this spring abuts against a projecting portion of the bolt F, the said spring serving the double purpose of forcing the bolt forward and holding the tumbler in its normal position. Separate springs may, however, be

used, if desired. The end of the key is inclined in order to force the arm g out of the slot. The lock is also provided with the tum- IOO bler I, pivoted in a recess in the end of the frame A upon the opposite side of the bolt FV coming in contact with the tumbler move it.

into engagement with the pin t" and prevent .further retraction of the bolt.

While my improved lock may be usedlupon.

a variety of articles, and I do not wish toflimit myself to its use upon any one of them, I have shown'the lock inr the drawings as employed upon a mail-bag, the lock being riveted to one endl of the strap h, which passes around thev ap and bag, as shown in Fig. 1. The lock is fastened tothe strap,preferably', by extending the plateslB C beyondv the frame, inserting the strap between the plates, and riveting them together, the other end of the strap being rigidlysecured tothe'ap, as shown. The catch E is also attached to the flap of the bag, and when the bag is locked passesen'tirely through the openings b in the plates B C,the bolt F bei'ng'forced back by the catch. As soon as the catch has been inserted a sufcent dista-nce the bolt springs into engagement with the" should'erf7 and locks thebag, as shownk in Figs. 1 and 5.

The bag may be unlocked by inserting the key shown inA Fig. 13, the .ward of which" extends through the slot f8 in the barrel D.'V

Upon the insertion of the key the projections g g? of' the arms of the tumbler G are forced into such a position as to enable them to travel freely in the grooved of the barrel andl permit the latterv to rotate with the key,whi'le the reduced portion f3 of the key permits said key'to' be turned'without disturbing the tumbler'I until the Ward f2, coming in contact with t'heshoulder f ot the bolt F, retracts sai'dy bolt lfromengagement with the catch and` permits the latter to be withdrawn. As be= fore stated, the insertion of a false key'woul'd be apt to displace the arms g gz'of thel tunibl'er Gr and so prevent the turning of thebarrel, the projection g2 entering the recess d in the groove d, Fig. ll. Such a key would also be liableto move the tumbler I into engagement with the pin i', when the bolt F would be held from retraction. The shoulder f of the bolt is made very slight, as shown, so that the key-ward must be nicely adjusted in orderto operate the bolt.

er'ably provided with shoulders ax to insure ready action of the catch and' prevent its engaging the plate C'when being withdrawn.

The frame A is pref- Instead ot having the bolt reduced at a portion of its length, I may, if I prefer, 1ncrease the depth of the recesses in the frame A, so as to permit the b olt to be made of uniform thickness throughout. The tumbler I ,may beA provided with a groove, it desired, iadapted to'be engaged by a suitable ward of the key instead of having the key recessed, as shown.

What I claim, and desire to secure by Letters Patent, is-

1. In a lock,the combination, with a spring- I bol-t, otv a revolvingbarrel having a slot at onev side for the reception of a key, a key provided with a projection adapted to engage the bolt, and a tumbler engaging said barrel and adapted to be engaged and released by saidkey, substantially'as described. Y

2'. Inl a lock, the'combina'ti'on, with' a springbolt, ot the' slotted barrel, and th-'etumbler adapted' to engage the slot ot thebarrel, substantially as described.

3. In alock, the combination,Withthebolt, of the slottedy barrel, the tumbler adapted to engage the barrel and tobe disengaged' by the direct contact otl thekey, and the tumbler adapted to engagethe'bolt,substantially as described.

4. In alock, the combinatiomwitlia spring- .bol't, of the' slotted barrel", the tumbler having arms extending on opposite sides of the barrel, said arms having projections, one adapted to engage the slot of the barrell and the other ad'aptedto engage a recess therein, substantially as' described.

5. In a'lock, the combi-nation,withfthefmain f'rameand side plates, of a bolt-, a-slotted barrel provided with anl annular grooveand having a recess in said groove, as set forth, and

' a tumbler provided with arms having in-Ward projections adapted to-travel" in said groove whenv the barrel is rotated, substantially as described. p

6. In a lock, the combination, with amail-n frame and side plates, of a bolt, av barrel provided with an annular groove and withV a re cesstherein, a tumbler provided with arms having inward projections adapted to travel in said groove when-"the barrel is' rotated, and a spring adapted to force oneof said arms 'into the key-slot of the barrel and the other arm adapted to en'gage'then recess oi;r thevk said groove, substantially as described.

In testimony whereof I afiix my signatur-ein presence of two witnesses.



W'. W. DUNN, R. L. JoHNsoN.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5061086 *Sep 26, 1989Oct 29, 1991Vallerga Jose ASecurity pouch
Cooperative ClassificationE05B65/5284