US1146720A - Combination-lock. - Google Patents

Description

A. LEONARD.

COMBINATION LOCK.

APPLlCATlON FILED DEC-8,1913.

Patented July 13, 1915.

WITNESSES ATTORNEY COLUMBIA PLANOGRAPH CO.,\VASH!NGTON, D. c.

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ALBERT LEONARD, or'nULUTmMInNEsoTA, ASSIGNOR' or ONE-HALF TO AXEL EDEMAN, or DULUTH, MINNESOTA.

intense.

I COMBINATION-LOCK.

Specification of Letters Patent. Patented July 13, 1915.

Application rues December 8, 1913. Serial No. 805,384.

To (ZZZ "whom it may concern 'Beit known that I, rinnnn'r L NARD, a

, citizen of the United Statearesidingat Duof the luth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Combination-Locks, of which the following is a specification, reference being had therein to the accompanying drawing. I

My invention. relates to improvements in combination locks the primary object of which is to construct a combination. or permutation lock which will occupy a minimum of space. i p v A further object of the present improve ment is to so construct the lock thatit" is greatest simplicity: v of construction and hence economy of manufacture,

Another object of. the present-improvement is to provide a combination lockiwhich is automatically released whenthe 'combi'na tion has been set. v p ,Q i i In the accompanying draivings eFigure l is a side elevation of the locking device with all thetumblers removed except the first. Fig. 26s an enlarged crosssectional view of the tumblers and showing the arranged relation of one to the other. Fig. 3 is a View ofthe last tumbler and als o" showing its means of engagement with the next adjacent tumbler. [Fig. 4 is a side elevation of the tumbler knob by means of which the lock is operated. Fig. 5 is a side elevation of the shaft which formsthe connection between p of tumblers Q, 3 and 4.

the tumbler knob and the tumblers. Fig. 6 is aside elevation of a [thumb shaft by means, of which the tumbler shaft is con-jnected to the tumblerknobg Fig. 7 is an end elevation of the entiremechanism assembled and in position on the door. Fig. 8 is a front elevation of Fig. 7

Referringnow to the drawing in which like reference numerals designate similar parts, 1 represents the case whichIisof a rectangular form and is adapted to receive the variousparts of the locking mechanism. Within the case 1 are arranged a plurality Thetumbler 2-has an unbroken surface adjacent the back wall of the containing case land on the opposite side thereof is a cut-in annular. groove 6, the outer edge ofwhich is circular inform and the inner edge thereof is established by the polygonal center 7 of the tumbler and through this center a circular hole 8 is provided for the admission of a tumbler shaft 9. The tumblers 2, 3 and a are of the same size and shape except in respect to the circular hole 8 through theircenters. The hole 8 in the tumblers 2 and 3 is of the same size and of. considerably greater cross section than the thickness of the tumbler shaft 9. The hole 8 in the tumbler l is of a size and shapeto exactly fit the end of the tumbler Within by'the motion of the tumbler, of which it is an integral; part, until it comes in contact withthe stop 12 of the preceding tumbler, thus setting in motion the preceding tumbler,and moving it to the desired position. A lug l3 is which acts similarly upon the intermediate tumbler 3, both of the tumblers 3 and 2 deriving their motion from the tumbler L as will be more fully pointed out hereinafter.

It is well understood that any number of tumblers may be employed in order to complicate the combination feature of the looking device without departing from the spirit and intent of thisin'vention. In the. last tumbler -4,'tl1e groove 6 and ring 10 are dispensed with, but this tumbler is provided with a lug 13 for engagement with the stop 12 of the next preceding tumbler 3. Each tumbler though circular in shape, has a chord removed from one edge, each in a like manner, resulting in a flattened side or edge as is clearly shown. There is aspring or springs 14 for each tumbler and these springs are connected to the inside of the case 1. They are adapted to engage each tumbler separately and to maintain a constant pressure'thereupon in a direction.

also providedv also provided on the tumbler 4.- l

succeeding tumbler is set.

bar or plate which is superimposed with the door frame in such a manner 'as to fit within suitable orifices made therewithin as is readily understood.

A dial is arranged upon a bearing plate 18'which is an integral part of the tumbler in this position,

. stop12 on the other.

knob 19 and by means of which the possessor of the combinationmay release or set the lock; Thev tumbler shaft 9 is designed to pass through a hole in the back of the case 1, opposite, the hole in the last tumbler as herein before stated, through'the holeinthe last tumbler 4, through the circular holes in the tumblers 2 and 3, through the front side, of the case 1, and into a corresponding oriiice within the. tumbler knob 19 as indicated in Fig. 4. A thumb screw shaft 21 is also provided which is designed to pass longitudinally through a hole in the center of the shaft 9 and thence into a threaded orifice 22 within the tumbler knob 19 thus unitingthe various parts of the lock. V l y In operation the tumbler 2, is first set,

with its flattened portion against the bar 15,

and this is done by turning the "knob 19 which revolves the last, tumbler 4 to which it is connected by means'of the tumbler shaft 9. As thetumbler 4 is revolved, through the medium, of the lugs 13 and stops 12 on the tumblers 2, and 3, it carries these. tumblers with it and consequently the possessor of the combination revolves the dial the necessary number of times tobring the tumbler 2 in position. The spring 14 then holds this tumbler in the position, in which it is left and the dial is then turned in the opposite direction. In like manner after, a correct number of turns the tumbler 3 is placed in position with its flattened portion opposite the plate 15. The dial is then again revolved in the opposite direction and the tumbler4 is set with itsflattened portion against the bar the flattened portions of all the tumblers registering, the plate 15 is forced inward by the springs 16-16 thereby drawing the bolts 1717 out ofengagement with the door frame.

As has been pointed out the inmost tumbler 4 is the, only one which is revolved directly by the shaft 9 as the hole therein is of the same polygonal shapeas that of the shaft and the other tumblers are only revolved as the lug 18 on the one impinges the any one of thetumblers set so that, when impinged by the dog of the preceding tumin their 1.5and as soon as-it is placed Thus thefstop 12, which 15 anintegral part of the ring 10, in

bler that the flattened side or chord of the tumblers do not registeiythen no amount of turning of the tumbler knob in either direction continuously'wil-l ever effect an unbolt-" ingof the-lock. V a

The possible adjustment of the" rings 10 within the grooves 6 in the tumblers may be varied by varying the number of sides of the polygonal centers ofthe tumblers, thus 'providing a greater multiplicity of relative po sitions for the stops 12 in each tumbler and thus increase the possible combinations of the lock. The shaft 9 may be correspond ingly changed in its cross'sectional shape to allow of such variation, and it is clearly evident that. any, change. of position, of this shaft 9 either in relation to the tumbler4 or the-tumbler knob will alter the combination. Having thus fully described my invention what I claim and desireto. secure by Letters Patent 'isz' Y Y 1; In a permutation look, a housing, a polygonal shaft mounted within, the housing, a pluralityof tumblers mounted upon the shaft within'the housing, one of thetumblers having a polygonal opening interlocking with the polygonal shaft, grooves in the upper faces of the-tumblers havingpolygonal edges J at their, centers, removable rings in the saidjgrooves and having polygonal.

inner edges, thesaid rings 'havinga groove upper face, and a lug in the said groove, lugs on the lower faces of'theI tumblers adapted to. engage the saidlugs in the removable rings, whereby the combination of the lock maybe altered by removing the rings and placingftheirpolygonal edges opposite different polygonal edges of the grooves. I

2. A combination lock comprising aehousing, a polygonal shaft. therewithin, a plurality, of tumblers,;mounted on the said shaft, grooves in the upper faces of the-tumblers having polygonal edges at their centers, removable rings in the said grooves having polygonal edges at their centers, the said rings, carrying connecting means between the tumblers, saidmeans comprising a circular groove in the removable ring, and". a lug therewithim; and, a lug 'on the lower, face of 1the tumbler to engage the first-mentioned ug; I In a permutation lock,,a,housing, a polygonal shaft, mounted within the housing, a plurality oftumblers mounted upon the shaft within the housing, one ofthe tumblers having, a polygonal opening interlocki I ing; with the polygonal shaft, circular 'groovesin the upper faces of the tumblers havingfpolygonal edges at their centers, re-

movable circular rings fitting within the p said grooves and having polygonal inner edges, whereby the combination of the. lock may be altered by removing the ringsand onal edges of the grooves and by changing the lug fastened in the groove, the parts, i

the interlocking connection between one of arranged as and for the purpose described. 10 i the tumblers and the polygonal shaft, circu- In testimony whereof I hereunto afiix my lar grooves formed in the upper surface of signature in the presence of tWo Witnesses.

5 the removable rings, and a lug formed in the ALBERT LEONARD. said groove, 2. projection carried by the I Witnesses: lower faces of the tumblers and running in W. H; DENHAM, the said grooves, said lug adapted to engage S. GEO. STEVENS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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