USRE4596E - Improvement in permutation locks - Google Patents

Description

MA. I 25W LYMAN F. MUNGER Improvement in Permutation 'Locks.

N0. 4,596. Reissued Oct. 17,1871.

UIIIIIIIIII HIILIllllllll UNITED" STATES LYMAN F..MUNGER, OF ROCHESTER, NEW YORK.

IMPROVEMENT IN PER MU TATION LOCKS.

Specification forming as of Letters Patent No.17,804, dated July 14,1s57; reissue No, 62, dated April 2, 1861; ex-

' tended seven years reissue No. 4,596, dated October 17, 1871.

To all whomit may concern:

' Be it known that I LYMAN F. MUNGER, of

' prevent the bolt being operated or thrown, andv these means will be fully understood by those skilled in the art from the following description of the several parts and their mode of action.

In the drawing, Figure 1 is an elevation, showingthein'terior of the lock; Fig. 2, a vertical crosssection of the same inthe plane of the dotted, Fig. 1; Fig. 3, a vertical longitudinal section in the plane of the dotted line, Fig. 2 Fig. 4, a fragment of the outside'of the lock in elevation, showing the index-scale; Fig. 5, an elevation. of the tumbler removed from place; Fig. 6, an eleva tion of the lock-case with all the working parts removed except one set of wheels; Fig. 7, a top View of the lock; Fig. 8, a view of the eccentric for disengaging the Wheels,

On reference to the drawing there will be seen B, the bolt of the lock; J, the bit of the station- Qary key which throws said bolt back and forth; and S, Fig. 5, the hlllllbll which secures the bolt and prevents its movements by means of the pro jections mm, which interlock with corresponding indentations or sockets y y in the bolt. This tumbler is guided vertically by the studs 8 s s, and is constantly forced down by a spring, I), acting through the medium of alever, f. This lever turns on a pin, j, at its center of motion, which passes through a slot, of thebolt, as seen in Fig. 3. The action of the key is such asto raise the tumbler, if nothing prevents, before acting,

upon the bolt, thus leaving the bolt free to move back and'forth. The tumbler S has aifixed to it a tongue, g, which strikes into the slots t of wheels V, of which there are three in the set,.as shown in the drawing. If the slots in these wheels should all coincide and come vertically over the tongue q it is evident that the tumbler might be raised by the action of the bit J of the key; but if the slots should not all coincide with the line of q, then the tumbler could not be raised, and consequently the bolt could not be thrown. Thus far the lock is similar to others of its class. Vi'orking into each of the wheels V are others which constitute the setW, and these two sets of wheels may be engaged with and disengaged from each other by means of the eccentric arbor 1; on which the wheels V are located. The eccentricityof this arbor is simply such that when thrown in -one direction the two sets of wheels will be en-' gaged, and when thrown in, the other direction they will be disengaged. This arbor has a square end, by which it maybe turned by a key fitting thereon; and when turned in one direction the Whole is held in position by means of a pawl, d, catching into "notches in the ,disk 0, which is secured. to the arbor. These notches are so arranged th at they allow the pawl to spring out when turned i 1 1 the other direction. The journals or bearing them to revolve in either direction whensufiicient force is applied. The remaining wheel,W, has pivoted upon. its face a friction-clutch, a, with a double angular point, 2, Fig. 1, which bears upon the circular face a of arbor K, and by its friction thereon'serves to give sufi'icient adhesive connection between said arbor and wheel to drivethe latter, and consequently all the wheels W, unless undue resistance is met, when the clutch slips upon the arbor, and the latter revolves free. By this means breakage and disarrangeinent are avoided. A spring or springs,

12,. may be employed to give the desired elasticity to the clutch. This feature of a fi'ictioreclutch combined with the arbor is such that the lockworks may be driven by the frictional connection; but if any undue resistance is met the said arbor or spindle may turn free. p

In order to restore the position of the wheel W 011 its arbor K in case of slipping, as above described, I-forrn in the face of the arbor an angular notch, '70, into which the point z of the clutch strikes. When theseparts coincide the Wheels will always be in position to be set to openthe lock. Were 'it not for this arrangement of the notch and point, or some equivalent, there would be no means of telling the position of the wheels when the door. upon which the loc-lcjwas placedwas closed. a This feature also constitutes one novelty in my invention. Each of the wheels W has a pin or projection, a, projecting from its side, so placed at equal distances from the center as to strike together when the wheels are turned." This'one wheel gives motion to another, and each has a full revolution, lacking the thickness of a pin, before strike ing the next.

It will be I noticed particularly that the pins n n are connected with one set of wheels, W, and the slots t are formed in the other set of wheels V, and that as these two sets of wheels are disengaged and then engaged in different positions,

these pins. and slots will be correspondingly changed in their positions relatively with each other. This is" of importance, asthereby the different changes or combinations are effected, accordingly as set on the index-scaleoutside the lock. c A The combination of the lock is changed as follows: First, having the slots it all in position over tongue q, the wheels V are disengaged from the wheels W, as before described; turn the arbor K around till by means of the pins n on the several wheelsW, all these-wheels are caused to revolve; then bring the index or pointer on this arbor opposite any number on the graduated ring within which it moves and note its position; then reverse theimotion of the arbor K, carrying it around one complete revolution, and

g as much more as may be desired, and note the figure opposite which the pointer on the arbor stands, not completing 'two revolutions, however. -Again reverse the motion of the arbor; be-

' ware, however, that it be not carried a full revolution, and again note the position of the pointer, as before. If now the wheels V be re-engaged with the wheels W the lock can be opened by turning the wheels in proper position, according to the prearranged formula-that is, according to the numbers to which they have been set.

This arrangement of two sets of wheels or equivalents, one carrying driving-pins and the other the slots, insures a very great number of changes of the combination-a change being effected at each distinct position to which said pins and slots are set relatively with each other.

So far as I am aware, I am the first to so combine two sets of wheels, one having the pins and the other the slots, that their relative position may be changed. The pins and slots had been combined in a single set, and both on a single wheel before my invention; but in such case the relative position of said parts could not be changed unless by removing the pins by hand and affixing them in different positions, as in Aikens lock, and others. In my case, the positions of the pins and slots can be changedwvithont open Y ing the lock, being efi'ected by "simpl y disengagmg the wheelsto make the change, and then 're-engaging them, as before described, and turning them to place,

\Vhen the slots t are all in line over tongue q, a hole may be bored through the back of the lock, and through the ,wheels, and a pin, m, may be inserted therein at anytime to take up the com- -bination if it is lost. In such case, as the wheels are turned, the pin passes through gradually till allare in line. v I

What I claim,-and desire to secure by Letters Patent, is-'- 1. A series of wheels, W, revolving on a common center, and provided with teeth or indentations at their peripheries for changing their position relatively with other wheels V or their. equivalents, when each of the wheels W aforesaid has a pin projecting from its side or sides, so placed as to interlock with similar pins in the wheel or wheels next adjoining it, to operate substantially as andfor the purpose herein setforth.

2. In a combination lock, the combination of two sets o'fwheels or their equivalents, capable of engagement and disengagement, when one set has interlocking-pins n n for \drivingthe Wheels of thatset, and the other set has slots tt for releasing the bolt, the relative position of said pins and slots being changed to produce new combinations, by simply disengaging and changing the relative positions of the wheels, and re-engaging them, as specified.

3. In combination with the two sets of wheels NV and V, which are capable of engagement and disengagement, the eccentric arbor 1, passing through the wheels V, for throwing on'eset away from and toward the other, as herein described.

4. In combination with the wheels V and cocentric arbor r, the notched disk 0 and pawl 01, for holding the wheels in or out of engagement, as described.

'5. In combination with the arbor or spindle of a combination look, a friction-clutch, a, so ar-' ranged that the lock-works. may be driven by the frictional connection, but-if any undue resistance is met the said arbor or spindle may turn free, as described.

6. The combination, with the clutch a and arbor K, of the notch k and point z, for the purpose J As. SARGnN'r. (93)

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