US404568A - Irvin a - Google Patents

Description

(ModeL) I. A. SHAW. COMBINATION LOOK. No. 404,568. Patented June 4,- 1889.

INVENTOR ATTORNEYS.

UNITED STATES PATENT OFFICE.

IRVIN A. SHAWV, OF KINSLEY, KANSAS.

COMBINATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 404,568, dated'June 4, 1889. Application filed June 12, 1888. Serial No. 276,820. (ModeL) To all whom it may concern.-

Be it known that I, IRVINA. SHAW, of Kinsley, in the county of Edwards and State of Kansas, have invented a new and Improved Combination-Lock, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved combinationlock, which is very simple and durable in construction, and in which the operator is guided by the sound of aspring engaging a turning ratchetwheel.

The invention consists of certain parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a face View of the improvement. Fig. 2 is a like View of the same with the outer plate removed. Fig. 3 is a similar View with the inner plate removed. Fig. 4 is a sectional plan view of the same on the line or a: of Fig. 1, and Fig. 5 is a cross-section of the same on the line y g of Fig. 1.

The improved combination-lock A is provided with the usual locking-bolt B, held .to slide in a suitably-constructed casing 0, consisting, principally, of a plate 0- fastened to door D, and of a casing O secured to the said plate 0. The outer end of the locking-bolt B is provided with the bevel B, adapted to engage the removable catch-plate E, held to slide in the keeper E, secured to the doorjamb D. In the bottom edge of the lockingbolt B is formed a notch B which engages the end of a pin F, secured to the shaft G, mounted to turn in the casing O, and passing through the door D, carrying at its outer ends the usual door-knobs H. The outward movement of the pin F is limited by a stop-pin F secured to the plate 0', and the inward. movement of the locking-boltB is limited by a projection B formed on the bolt B and adapted to engage the said stop-pin F. At the inner end ofthe bolt B is formed a projection B4, on which is coiled a spring I, resting with its outer end against the casing O and with its other end against the said bolt B, so that the latter is pressed outward by the spring I.

In the locking-bolt B are formed one or more transversely-circular openings 13", 1n each of which is fitted to turn a tumbler J, provided with a slot J, extending at one end to the periphery of the tumbler. Into this slot J fits the flat plate K, provided with a slight extension K of the same size and form and adapted to pass into a slot 13, formed in the bolt B, and being a continuation of the circular opening B The flat plate K is formed on the shaft K extending through an opening D in the door D, to the outside of the latter, and having its bearing in the inner plate 0' of the casing O and in the outer plate C secured to the outside of the doorD. On the outer end of the shaft K is secured a small knob K On the other end of the flat plate K is formed a collar K, which has its bearingsin the casing 0 and from the said collar K projects the reduced shaft K which is threaded on its outer end, on which screws asmall knob K similar to the knob K above mentioned.

On the inner part of the shaft K is fitted a ratchet-wheel L, the face of which rests against the collar K and said wheel is secured on the said shaft K by screwing the knob K tightly against the said ratchet L, so that the latter is clamped on the collar K by the knob K, whereby the said ratchet-wheel L turns with the shaft K the plate K, and the shaft K The teeth of the ratchet-wheel L are engaged by a spring N, secured by its end to a suitable post held 011 the casing 0 The ratchet- Wheels L and the springs N are inclosed in a covering plate or casing 0 secured to the outer plate 0 of the casing O, as is plainly shown in Fig. 4. In each ratchet-wheel several teeth are broken out, so as to form on the periphery of the wheel a space L, as shown in Fig. 2.

The operation is as follows: The springs N permit their respective ratchet-wheels L to be turned only in the direction of the. arrow a.

By making one complete revolution of the ratchet-wheel L the free end of the spring N comes in contact with the space L and then with the several teeth. When the spring passes over the space L, no sound is heard from the outside; but when the spring passes over the several teeth the usual click is heard. The number of teeth in the ratchet-wheel L is known to the operator, and the ratchetwheel is set to any desired number of teeth, counting from the space L in a forward direction, as indicated by the arrow at. The ratchet-wheel is set by loosening the knob K or K and then turning the shaft K so that the Hat part K assumes a certain relative position to the slot B in the loeking bolt l3 that is, when, for instance, the ratchet-wheel ll, on the right-hand side of Fig. 2, is set to eleven teeth the plate stands in line with the slot B. The other ratehetwhcel L, at the left in Fig. 2, is set to six teeth, so that the combination of the entire lock, as represented in the drawings, is set to six and eleven.

When the flat parts K and K are in the positions shown in Figs. 2, 3, and l, they register with the slots 13 and permit the "operator on turnin g the knob ll, to slide the bolt 13 forward or backward, so as to open or close the door; but when the other knob K or K, turned from the inside or outside of the door, so that the respective springs N engage other teeth than 0 and 11 on the ratchet-wheels L, the flat parts K andK stand at an angle to the slots'li, and hence prevent the sliding movement of the bolt ll. The door is then in a closed position, and the front end 13 of the bolt 13 engages the catch E.

hen the operator desires to open the door from either the outside or inside after the ratchet-wheels L have been displaced, as above described, he first turns either the inside or,

outside knob K" or K until the click is no longer heardthat is, when the spring passes through the space L. Then the operator counts the number of clicks until, on the left knobs K and K, he count-s six, and on the other knobs K and K on the right he counts eleven clicks, which indicates that the ratchetwheels L and springs N stand in the position shown in Fig. 2, and the Hat parts K and K of both shafts 1 also stand in line with the longitudinal slots 13 of the locking-bolt l The operator can then turn the knobs ll so that the pin F of the shaft G, engaging the notch B of the locking-bolt 13, moves the latter inward, and the slot 1%passcs over the fiat part K.

\Vhen the operator releases the knob II, the spring I forces the bolt 13 outward again, so that when the door is closed the beveled end '3 passes over and onto the catch E, after which the operator presses the said knobs K5, so that the springs N engage different teeth of the ratchet-wheel L, whereby the flat parts K and K are thrown into an angular position in relation to the slots B in the bolt B. The door is then locked.

Thus it will be seen that the operator can set the ratchet-wheels L to any desired combination, and the door can be locked or nulocked from either the inside or the outside.

I do not limit myself to the special constructi on of the knob-shaft G with its pin 1", as other devieessuch as a slide-may be used to operate the bolt 13. If there is no necessity for opening a door from the inside, then the inner knob ll is entirely dispensed with. For heavy doors I may make the bolts B double, and in order to complicate the combination more tumblers may be added. If the catchplate E on the inside of the doorframe is removed, the door may be opened from the inside, which is necessary in case of fire and strangers who do not know the combination. The lock may be used in a mortise-lock as well as a caselock. i

Having thus fully described my invention, 1 claim as new and desire to secure by Letters 'Patent 1. The combination, with a sliding bolt having a 1011gitudinally-extendin slot and a circular opening communicating with the inner end of said slot, of a shaft having a flat part, a circular tumbler havin a slot receiving said flat part and turning in said circular opening, whereby, when. said flat part and tumbler-slot are perpendicular to the boltslot, the bolt will be locked and when turned fiatwise into the plane of the bolt-slot the bolt may be retracted, said tumbler sliding with the bolt, substantially as set forth.

2. In a combination-lock, the combination, with a locking-bolt provided with a circular slot connecting with a longitudinal slot, of a shaft provided with knobs and having a Hat part, a tumbler held on the said flat partand fitting into the circular slot of the lockingbolt, a ratchet-wheel held on the said shaft and turning with it, and a spring engaging with its free end the teeth of the said ratchetwheel, substantially as shown and described.

In a eoi'nbinationdock, a locking-bolt provided with a circular slot continuing into a longitudinal slot, and a knob-shaft provided with a pin for operating said lockingbolt, in combination with a shaft provided with a knob on the inside and on the outside of the door, and also having a flat part adapted to engage the longitudinal slot of the said locking-bolt, a slotted tumbler held on the said flat part and fitting into the circular slot of the said locking-bolt, a ratchet wheel held on and turning with the said shaft and provided with a space in its periphery, said space being formed by the breaking out of several teeth, and a spring engaging with i free end the teeth and space of the said. ratchet-wheel, substantially as shown and described.

at. In a combination-lock, a locking-be] t provided with a circular slot continuing into a longitudinal slot, and a knob-shaft pro vided with a pin for operating said lockingbolt, and a spring ,bearing against said locking-bolt, in combination with a shaft provided with a knob on the inside and on the outside of the door, and also having a flat part adapted to engage the longitudinal slot of the said locking-bolt, a slotted tumbler held on the said flat part and fitting into the space of the said ratchet-Wheel, substantially as shown and described.

IRVIN A. SHAWV.

Witnesses:

F. H. HANSON, H. F. BEST.

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