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Publication numberUS1335959 A
Publication typeGrant
Publication dateApr 6, 1920
Filing dateNov 1, 1916
Priority dateNov 1, 1916
Publication numberUS 1335959 A, US 1335959A, US-A-1335959, US1335959 A, US1335959A
InventorsFlagg Earl W
Original AssigneeFlagg Earl W
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Permutation hasp-lock
US 1335959 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



APPLICATION man Nov.1. |916.

Patented Apr. 6, 1920.




Specification of Letters Patent.

Patented Apr. c, 1920.

Application led 1\ovcmber 1, 1916. Serial No. 128,987.

To all whom t may concern:

Be it known that LEARL W. FLAGG, a citi zen of the United States, residing at Tenino, in the county of Thurston and State of Washington, have invented certain new and useful Improvements in Permutation Hasp- .L'ocks, of which the following is a specitication.

` This invention relates generally to locks, and particularly to combination or permutation locks.

- The primary object of the invention is to provide a permutation lock adapted parlticularly for use upon hasps v'or the like vide a device of the character set forth which may be manufactured at low cost, which is featured by the lack of intricate or complicated parts,` which is positive lin operation, and which will prove thoroughly j efficient in practice.

With these objects in view, together with others which will appear as the description proceeds, the invention resides in the novel formation, combination, and arrangement of parts, all as will be described more 'fully hereinafter, illustrated in the drawings, and particularly pointed out in the claim.

In'the drawings Figure 1 is a plan View of a'hasp lock embodying the p invention;

Fig. 2 is a longitudinal sectional view taken substantially upon line 2-2 of F ig. 1; Fig. 3 is a sectional view taken upon line 3443 of Fig. 2 and looking in the direction of the arrows;

Fig. 4 is a similar view taken on line 4 4: ofi` ig. 2;

' Fig. 5 is a similar view taken on line 5*-5 of Fig. 2; and

" Fig. 6 is a transverse sectional view taken on line 6 6 of Fig. 2.

Referring now more particularly to the drawings, the hasp is indicated generally at 10, and comprises a .pair of leaves 11 and 12 hingedly connected together at their adjacent ends as at 13. It will be understood that the leaf 11 is to be secured either to the fixed body or to the movable top of a box, trunk or the like, and the leaf 12 -is to extend over to the opposite member to secure the same together, and 'a plate 111A may be secured as by screws 15 tothe lid or body adjacent the end of the leaf12 and is equipped with a staple or eye 16 adapted to engage within the opening 17 in the end of the hasp strap 12.

The extreme end of the leaf 12 is enlarged as shown, and the outer surface of the `said leaf is provided with an annular boss 18 vof relatively shallow depth. An annular groove is made in the outer exterior edgev of the boss, within which the open end of a barrel Vsection 2O is threadedly engaged. This barrel section may be readily applied to and detached from the boss or section 18, and is closed at its outer end by avplate 21, uponwhich is'rotatably mounted a permutation dial 22 having the usual knob 23. The dial 22 is equipped with a central inwardly extending pin 211, the latter extending through the plate 21 and has ixedly secured to its inner end a tumbler 25. This tumbler will rotate with the pin 24 and 'has its edge notched as at'26, as is usual, and is also provided with a lplurality ofy'evenly spaced threaded openings 27, the latter being adapted to receive a pin 28. Thek openings in the tumbler may be numbered 'Acorresponding to the numbers upon the dial 22, and the pin 28 may be changed from one opening to the other'when it is desired to change the combination of the lock.

Secured as by screws 29 to the outerportion or face of the boss 18 is a diaphragm 30, the latter being notched as at 31 fora v purpose to be hereafter pointed out. Se-

cured to `the outermost face of the diaphragm 30 and centrally thereof is a pivot pin 32, upon which is rotatably mounted a tumbler 33 similar in size, shape, and construction to the tumbler 25 above detailed.

The notches in the rotatable tumblers `are adapted to aline when the same have been operated to release the latch bolt to be hereafter detailed and the pins 28 project from the adjacent faces of the said tumblers and yare adapted to engage when the tumbler 25 is sufficiently rotated, to enable the tumblers to be properly positioned. By providingeach of the rotary tumblers with aplurality of threaded apertures, arranged in spaced relation, it is obvious that the combination may be readily changed by moving the pins 28.

Arranged for sliding movement diametrically across the barrel and within the boss 18, is a lock bolt 35. This bolt is provided with anl elongated slot 36, through which a guide pin 37 extends to maintain the bolt at all times in proper position upon the hasp leaf. rlhe bolt projects at one end beyond the side of the barrel as shown, so as to be readily grasped by the fingers to be slid into locking or unlocking position. The central portion of the bolt is widened as at 38, and the said widened portion is cut away as at 39 to provide an opening. Projecting into the opening from one of the edges thereof is a tongue 40, the latter being disposed in the same general direction as that assumed by the bolt when sliding. The ltongue 40 corresponds in length with the slot 36, and is so positioned upon the hasp leaf 12 as to extend transversely across the staple receiving opening 17 thereof. When the bolt has been moved to locking position, the tongue 40 will project through the staple 16, but when the bolt is moved to inoperative or unlocked position, the said tongue will be withdrawn from within the inwardly projecting staple, and the leaf l2 of the hasp will be free to swing upon its pivot.

The inner end of the bolt 35 is provided with a fence member 41; the latter being disposed at right angles to the hasp and within the barrel, and projects through the opening or slot 31 in the diaphragm 30. When the bolt is moved inwardly of the barrel to its eXtreme limit, the fence member lies beyond the peripheries of the rotatable tumblers 25 and 33, and the latter are capable of being freely rotated upon rotary movement being applied to the dial knob 23. When the notches in the tumblers are alined and disposed adjacent and in the path of movement of the fence member 41, outward movement of the bolt will cause the said fence member to slide within the alined notches, and the tongue 40 carried by the bolt will be disengaged from the staple 16. lt is to be noted, however, that the fence 41 is of such length as to be held against outward sliding movement by the edge of either of the tumblers.

The boss 18 is provided with a shallow slot or opening 42, which registers with a notch 43 in the threaded inner edge of the barrel section 20 when the latter has been tightly screwed upon the said boss. These alined notches or slotted portions are disposed adjacent the innermost end of the lock bolt, and the fence member 41 is provided with an angularly extending lug 44,`

the latter being adapted when the bolt is in locking position to enter the alined slot and notch to lock the rotatable barrel section upon the boss. When the bolt 35 has been moved outwardly of the barrel, the lug 44 will be withdrawn from engagement within the alined slot and notch, and the removable barrel section 20 may be unscrewed from the fixed section or boss 18 to permit of access being had to the interior of the lock casing, should it be desired to change the combination, or to repair the lock mechanism. j

ln operation, the movable leaf 12 of the hasp is moved toward the staple 16 secured to the trunk or boX section, and the said staple extends through the opening 17. rlhe bolt 35 is then moved inwardly of the barrel, whereupon the tongue 40 passes through the staple projecting into the barrel; the fence member 41 passes out of the alined notches j in the tumblers 25-33; and the detent or lug 44 passes into the aperture formed by the alined slot and notch 42--43. Turning of the knob 23 will cause the disk 25 to lmove its notch out of alinement with the notch in the tumbler 33 and continued rotation of the knob will, by engagement of the pins 28, cause the inner tumbler 33 to move out of unlocking relation with the said key member. With the tumblers in such position, it will be impossible to move the lock bolt to unlocking position, and in order to properly aline the notches in the tumblers, it is necessary that the dial 22 be rotated the proper number of times and in the proper directions, accordingly as the pins 28 are positioned upon the tumblers.

From this description, it is apparent that l have provided a lock which is featured by the lack of intricate and complicated mechanism; which is capable of being readily operated by those having knowledge of the proper combination; which can not be actuated without properly positioning the tumblers; and which, when in locked position, renders it impossible to remove the detachable barrel section.

A locking screw 19 is threaded from the inner face of the leaf l2, through the boss 18, and is adapted to engage in asuitable notch or opening in the barrel section edge to hold the latter against rotation. This screw can only be removed when the hasp is in open position, and its function is to prevent unscrewing of the barrel when the hasp is closed.

1While the present is a disclosure of the preferred embodiment of the invention, it is to be understood that the invention is not limited thereto, but that various changes may be made in the construction, arrangement and proportion of parts, without departing from the scope of the invention, as defined in the appended claim.

What is claimed is z- A lock of the character specified, comprising a leaf mounted to swing andhaving an opening at its free end to receive a staple,

, and having an offstanding boss surrounding the opening, a diaphragm secured on the boss and notched in its edge, a barrel threaded to the boss, a plate closing the outer end of the barrel, tumblers rotatably mounted on the diaphragm and plate and notched in their outer edges7 operating means for the tumblers including a knob exterior to the plate, a lock bolt slidable on the leaf in the space formed between it and the said diaphragm and having an enlarged portion in which is formed an opening, said lock bolt having a staple engaging tongue projecting into the opening anda laterally projecting extension to enter the registering notches of the tumblers and diaphragm, and a lug carried by the lock bolt and adapted to engage the boss and barrel to secure the latter when the lock bolt is projected into locked engagement with the staple.

In testimony whereof I aix my signature in presence of two witnesses.

EARL W. FLAGG. Witnesses: y


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4788837 *Mar 4, 1988Dec 6, 1988The Stanley WorksHasp-type latch with combination lock
US4793163 *Feb 19, 1987Dec 27, 1988The Stanley WorksHasp-type latch and method of making and using same
U.S. Classification70/4
International ClassificationE05B37/08, E05B37/00
Cooperative ClassificationE05B37/08
European ClassificationE05B37/08