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Publication numberUS1721747 A
Publication typeGrant
Publication dateJul 23, 1929
Filing dateApr 21, 1927
Priority dateApr 21, 1927
Publication numberUS 1721747 A, US 1721747A, US-A-1721747, US1721747 A, US1721747A
InventorsPeter Radosevic
Original AssigneePeter Radosevic
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flat-pin lock
US 1721747 A
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Description  (OCR text may contain errors)

5 I g as Jul 23, 1929.

FLAT PIN LOCK P. RADOSEVIC Filed April 21, 1927 f; U/F/IAflOSFV/C,


' WWW ATTORNEY Patented July 23, 1929.



Application filed April 21,

This invention relates to padlocks and has for its main object to provide a padlock which is extremely strong in construction and which for this reason and for its involved and elaborate securing means will be practically burglar proof.

Another object of the invention is to provide a padlock of the above mentioned character which is comparatively simple in construction, easy to operate and inexpensive to manufacture. v

Still other objects of the invention are: to provide a padlock as characterized hereinabove which will have two independent and different means of securing the same against unauthorized opening, which will have a compact solid metallic body and a heavy shackle as the only visible parts so as to make it safe against burglarizing, which will have a novel specific key designed to open the same in a simple manner, said key being especially suitable for heavy wear and tear and being easy to carry around or to store and keep in readiness for use, and which lock will be particularly adapted for mass manufacturing.

lVith the above and other objects, to appear as this specification proceeds, my invention mainly consists in providing a heavy metallic block, as the body of my lock, with two paral lel bores, one being shorter and the other longer to receive the two legs of a strong shackle made of steel or other suitable material bent in U form.

A plurality of bores are crossing the edges of the main bore from one side edge of the metallic block to a predetermined extent therein, While a similar bore between them is provided across the center of said main shackle bore, said center have extending all the Way across the metal block and crossing the shorter shackle bore. A feature of my invention is the use of flat tumbler pins slidably arranged in said edge bores and the provision of flat grooves in the sides ofsaid longer shackle leg to slidably receive said flat pins. The pins have arcuate recesses and when by an appropriate key all of the pins are pushed into a position where their arcuate recesses register with the main shackle leg, said shackle leg is free to be removed from its bore or to be raised therein, so as to free the shorter shackle leg and open the lock. The central transverse bore, across the center of both 1927. Serial No. 185,466.

shorter shackle leg. When said specific key to be described hereinafter, is applied to the fiat pins, it will also place the central portion of the slidable central tumbler pin in a registering relation with the bore of the main shackle leg and free the same and it also will free the catch device to release the shorter end of the shackle. 1

In order that its construction and operation may be readily comprehended, I will now proceed with a full, clear and specific description of the invention, having reference to the accompanying drawings, which show an approved embodiment thereof, and in which Fig. 1 is a central sectional elevation of my assembled padlock, the section being taken on the line 11 of Fig. 2. Y

11*; ig. 2 is an end elevation of the assembled 10c Figs. 3 and 4 are sectional elevations taken on the respective lines 33 and 4- 1 of Fig.

2 and Fig. 1, respectively. Figs.v 5 and 6 are front and side elevations of kthe key to be used with my improved loc x Fig. 7 is a fragmentary detail showing the fiat tumbler pins engaged in recesses in the main shackle leg and limited in their movements by crosspins.

Similar characters of reference designate similar parts in the various views and referring now more closely to said drawings, the numeral 10 indicates the metallic block of which my lock is mainly formed. Said block is of flat rectangular shape and the upper left hand end of it is removed to a certain depth as shown at 11 in Fig. 1, for

a purpose to be more fully detailed hereinafter. r

A shorter bore 12 and a deeper bore 13 are provided near the two opposite ends of the block, to receive the legs 14 and 15, respectively, of the shackle 16, the shorter bore 12 being arranged in the recessed portion 11, while bore 13 going all the way through the block 10 and being counterbored, as at 17.

A central smaller transverse bore 18 is provided from the short shackle leg end of the block through the centerline of the bore for the. ilongershackle leg, and then through to the opposite surface 21 of the block 10, in a still more narrowed form, .as at 19. A plurality of relatively smaller bores 20 start from the said surface 21 of the block and penetrate into the same to certain depth, as at 22, said bores being preferably disposed in equal numbers, here two being shown, at either sides of the large :bore 13 and crossing the same fromboth sides thereof to a desired depth, but to less than one half of its di- .ameter.

The larger leg 15 of the shackle has a collar 23 formed thereon, while its end carriesa disk or washer 24 secured thereto, sai'd collar 23 and washer 24 limiting the movements :of theishackleleg in both directions. A spring .25 .is arranged underneath said washer 24 within the counterbore 17, closed by a plug 26, said spring serving to normallyur e the shack leleg 15 in an upward, opening' irection.

The bores 20 house specifically formed tumbler. pins 27,- the main body 28 of each of which is anelongated fiat piece of material, preferably steel, preferably having rounded edges 29' to fit into said bores 20, though this is not absolutely necessary for their proper working,,whi1e theirifront ends are reduced rectangular pins 30, projecting through plugs'31 insaid bores 20, at their openings in surface 21. Pins 27 have enlarged inner ends 32, bywhich they engage limiting cross pins 133, while being urged in a forward :di

7 rection by springs 34 placed back of them in .the bores 20.

The central transverse bore 18 houses a pin 35 made up of three sections, 36, 37 and 38. The middle portion 37 is of exactly the same length ,as the diameter of the working portion 15 of shackle leg 15, so that when placed in alignment therewith it may pass with said shackle .leg within the bore 13 in unhindered manner. The front portion 36 of said pin carries a reduced front end 39 fitting intobore v19, while the rear portion 38 has a reduced part with a flat central rib 4O fitting between the two cross limiting pins 33 and being guided by them, and a recessed rear end 41, with two noses 42 and 43, respectively, leftat both sides of recess 41 A plug 44 may seal the bore l8 at its furthest rear end vand a spring'45 may be placed in said bore between said plug and the rear end of pin section 38 to urge the three piece pin 35 in a 'forward direction.

A key 46 is provided to be used with my novel lock, and is shown in detail in Figs. 5 and 6. The pin'has a fiat body 47, one end of which is formed into a circular disk 48 while the other end 49 is in the shape of a convenient handle for the same. Rectangular and circular pins 50, and 51 are arranged projecting from the surface of the disk 48 being of the sizes, shapes and arrangement to fit to the pins 30 and 39, respectively, in the body of the lock and described hereinabove. Theyarezof varying heights, chosen judiciously to co-operate with the respective pins in a manner to place all of them in the position required for the opening of the lock,

.as will appear presently.

A circular upstanding rib 52 may also be provided around the circumference of disk 48 of the key, to protect the pins thereon, to protect the user or his clothing, to give the key a more attractiveappearance, and'also to guide the key when in operation, as will be seen hereinafter.

F lat pins 27 have recessed portions 27*, said recesses 27 being of the exact circular curvature of the working portion 15 of the shackle leg 15, so that when all these arcuate recesses are placed in alignment with said leg, the same may freely move within its bore 13, but if they are out of alignment with the same, as theynormally will be on account of the arrangement of said recesses in the pins 27 and the action of the springs 34 urging them to theirforward limits,outofregistering with the bore 13, then parts of their integral flat portions 28 will be across said bore and prevent the movingof shackle leg 15 which has flat grooves 28 cut therein and dimensioned to exactly receive said fiat portions 28 but permit a sliding motion of them in said grooves 28.

It is ob'vious that while the central portion 37 of pin 35 and the integral portions 28 of springs 27 are allowed to take up a position across the shackle leg 15 under the influence of their respective springs, as described hereinbefore, said leg is effectively locked within its bore in a multiple manner and the lock cannot be opened. Pins 50 and 51 on key 46 however may be designed with such respective heights that when said pins are placed in a registering position with the pins 30 and 39 in the lock and the key is pressed on the surface 21 of the lock, the central portion 37 of pin 35 and the various recesses 27 in the pins 27 will all be placed into alignment with said shackle leg 15 and the same may be pulled in an upward direction for the opening of the lock.

I, however, may provide an additional securing device for the shackle 16, at the end of its shorter leg 14. This leg may be reduced, as at 14 to play in bore 12 and said reduced end may carry a grooved portion 7 14 and a disk or washer end 14", therenoses and the height of central pin 51 on key 46 may further be designed in such a manner that upon pressing the key on surface 21 of block 10, both noses'will release the disk 14, and the shackle leg 14 also may move in an upward direction in conjunction with the longer leg 15 and be freed from the bore 12 and permit the opening of the lock in the well known manner. Reduced portion 11 is provided on block 10 to shorten the necessary travel of the leg 14:, and of leg 15 therewith.

A circular groove 53 may be provided in the surface 21 of the block 10 to guide the rib flange 52 of the key.

It is obvious by the above specification and by inspecting the drawings, that my lock provides a multiple of locking means and thereby makes the unauthorized opening or burglarizing the same well nigh impossible. It is also adapted for the provision of a great many number of combinations in the opening pins without making it difiicult to manufacture, complicated to use, or expensive in cost. Its strength and simplicity will also be apparent and will further contribute to its desirability and safety.

As a specific desirable detail feature of my invention, I may remark, that the different portions of the central locking pin 35 may be made with exactly fitting concave and convex meeting surfaces, as indicated at 54, thereby eliminating any play between them and making the burglarizing of the lock more diflicult. I

I also want to be understood, that changes and variations may be made in the construction of the parts of my novel look. I however want to reserve my rights to all such changes if within the limits of the claims hereunto appended, or within the spirit and scope of my invention.

One important such change may consist in making the upstanding rib flange 52 of key 46 partly circular only, having the two sides of said flange in straight lines in an equal distance from one another to that of the width of block 10 so that the flange will partly fit into circular groove 53 in said block but part1 will also fit over the sides of block 10 thereby giving an immediate right position to the key. This construction is indicated by the dot and dash lines at 52 in Fig. 5 of the drawings, and obviously, the head 48 of the key will also receive then the form there indicated.

What I claim as new, is

1. In a lock having a block of material as a body, a bent shackle and a main bore to receive a main leg of said shackle, a first set of transverse bores crossing the edge of said main bore, a flat pin of strip material in each of said transverse bores, means to keep each pin in its relative distance from and in parallelism with the substantially parallel transverse edges of the block of material while per mitting its sliding movement in a transverse direction within said bores, grooves in said main leg adapted toreceive said pins and beingin registering relation with them when said leg is in a locking position within its main bore, said flat pinshaving .arcuate recesses normally being out of registering relation with said main bore, but being adapted to be in a registering relation with said main bore by suitable movements of said pins so as to permit the movement of the main leg in its bore and thereby open or look the device.

2. In a look as set forth in claim 1, said means to keep said flat pins in a stationary relative distance from the parallel edges of the block including cross pins against which said flat pins rest, said cross pin being transverse to the lock.

3. In a lock as set forth in claim 1, a reduced front portion for each flat pin, a plug in the front end of each transverse bore and an opening-in each plug to receive said re duced portion of the respective pin.

4. In a lock as set forth in claim 1, a central transverse bore crossing adjacent to the cen ter of said main bore, a plurality of pin sections in said central transverse bore comprising a continuous pin slidable therein, one section being identical in length with the diameter of said main bore, said section being normally out of register with said main bore but being adapted to be put into registering relation therewith so as to free the movement of the main shackle leg therein.

5. In a lock of the class described, having a block of material as its main body, a shackle with a leg sliding in a main bore in said block and a transverse bore crossing adjacent to the center of said main bore, said transverse bore slidably housing a pin of several sections for the purpose described, said pin sections closely fitting to one another with corresponding concave and convex surfaces developed about the axis of the main bore so as to prevent a play between said sections.

6. In a look as set forth in claim 5, a section in said pin identical in length with the diameter of said main bore, yielding means in said block to normally urge said pin section into a position out of register with said main bore, but permitting it to be set into registering relation with said main bore when so desired.

7 In a lock as set forth in claim 5, a reduced flat portion in one of said pin sections and a cross pin in said block against which said reduced flat portion rests to prevent turning of said section and to limit the movement of said pin.

8. In a look as set forth in claim 5, the front section of said pin having a reduced front end, and a plug in said bore with a recess therein to slidably receive said reduced front end.

9. In a lock having a block of material for

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3237436 *Jan 6, 1964Mar 1, 1966Williams Delbert ATumbler lock structure
US4388815 *Sep 8, 1980Jun 21, 1983Lawler Michael SPick-proof lock
US5394712 *Jan 11, 1994Mar 7, 1995Nigostar Industry Co., Ltd.Motorcycle lock
WO2009015617A2 *Jul 22, 2008Feb 5, 2009Casper Consulting A SLock
U.S. Classification70/38.00A, 70/387, 70/393
International ClassificationE05B67/22, E05B67/00
Cooperative ClassificationE05B67/22
European ClassificationE05B67/22