US941570A - Lock. - Google Patents

Description

N. T. FOSTER & B. M. DRE'SKA.

LOCK.

APPLICATION FILED FEB. 11, 1909.

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APPLIOATION FILED P131341, 1909.

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NOAH T. FOSTER, AND BERTHA M. DRE$KA, OF CHESTER, ILLINOIS.

LOCK.

Specification of Letters Patent.

Application filed February 11, 1909. Serial No. 477,340.

To all whom it may concern:

Be it known that we, NOAH T. Fos'rnn and BERTHA M. DRESKA, a citizen of the United States, residing at Chester, in the county of Randolph and State of Illinois, have invented certain new and useful Improvements in Locks, of which the following is a specifica-' tion.

This invention relates to locks,'and has special reference to that class of locks which are known as permutation locks.

An object of the invention is to produce a lock of this nature which may be employedas a padlock and in the use of which it is not necessary to employ a detachable key.

Another object of the invention is the provision of a device of this character which may be readily carried and which will be effective in use and which will be adaptable to all uses where detachable locking means are employed.

The invention has for a further object the provision of a lock of this nature which comprises but few parts, is simple in construction and operation and one which may be economically manufactured.

Other objects and advantages will be ap parent from the following description and it will be understood that changes in the specific structure shown and described may be made within the scope of the claims without departing from the spirit of the invention.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a side elevation of the complete lock, Fig. 2 is a top plan view of the same, Fig. 3 is a vertical longitudinal section through the lock, Fig. 4 is a side elevation of the lock, the casing being broken. Fig. 5 is a sectional view at right angles to Fig. 3.

Referring to the drawings, 10 designates a cylinder which is provided withv an integrally-formed head 11 and which is open at the lower extremity. The top 11 of the cylinder is diametrically apertured near the outer edge of the same for the reception of a shackle 12 which is detachably secured therein. The top 11 is also centrally apertured to receive the upper extremity of a pintle 13 which is secured rigidly in such position by means of a set screw 14 extended centrally through the top 11 from the side of the cylinder 10. The pintle 13 is provided with a flange 15 adjacent the inner face of the cover 11 for the purpose of forming a shoulder to provide a reinforcement for positioning the pintle 13 within the cylinder 10. Rotatably disposed upon the pintle 13 are a plurality of tumblers 16 which are provided with-integrally formed collars '17 for the purpose of separating the same at a predetermined distance apart and which are frictionally held in position by means of springs 18 which are embedded in apertures laterally formed in the pintle 13 and distanced so as to engage the inner faces of the collars 17. The tumblers 16 are provided with studs upon their inner opposite faces as shown at 19 which are adapted for engagement with each other upon the rotation of the tumblers 16.

In the lower end of the cylinder 10 a disk 20 is positioned which is provided with a flanged collar 21 which carries an upwardly extended stud 22 for engagement with the depended stud 19 carried by the adjoining tumbler 16 for the purpose of actuating the tumblers 16, the disk 20 being held in such position by the employment of set screws 23 which are secured through threaded apertures formed in the side of the cylinder 10 to admit of the inner extremities of the set screws engaging with the flanged collar 21 which construction prevents the withdrawal of the disk 20. The shackle 12 is provided with serrated-portions at the opposite ends of the same through which are passed the tumblers 16. The tumblers 16 are provided with oppositely disposed slots 24: formed in the edges of the same through which are adapted to pass the serrated ends of the shackle 12 upon the registration of the slots 24. For the purpose of reinforcing the ends of the shackle 12, especially when a strain is exerted upon the same by the rotation of the tumblers 16, the cylinder 10 is provided with longitudinally formed grooves 25 upon the opposite inner faces thereof which are of semicircular cross section, and into which are positioned the ends of the shackle 12 when inserted in the apertures formed through the cover 11. The disk 20 is preferably provided with a serrated perlphery for engagement by the hand of the operator for the purpose of admitting of the frictional engagement of the same during the operation of the tumblers 16. I The periphery of the disk 20 is also preferably marked so as to designate the number of turns and half turns required to turn'the tumblers to Patented Nov. 30, 1909.

cause the registration of the slots 24 formed in the edges thereof.

The operation of the device is as follows: When the disk 20 is rotated the stud 22 Which is carried by the same is caused to strike against the adjacent stud 19 and to carry the lowermost tumbler 16 about with the same. The studs 19 disposed upon the remaining tumblers are caused to strike one another during this operation and as the tumblers are rotated the slots 24 formed therethrough are caused to register and to admit of the withdrawal of the shackle 12 upwardly through the same. To lock the shackle in position the tumblers 16 are so positioned as to register the slots 24 when the ends of the shackle 12 are inserted through the cover 11 and through the slots 24. The disk 20 is then rotated in an op posite direction when the tumblers 16 are consecutively moved to cause the slots 24 to be turned out of alinement and to thereby engage the outer edges of the tumblers 16 through the serrations formed in the ends of the shackle 12.

What is claimed is 1. In a device of the class described, the combination of a cylinder, a cover integrally formed therewith, a pintle depended from said cover centrally in the said cylinder, a plurality of tumblers rotatably disposed upon said pintle, studs projected from said tumblers for engagement with one another, a disk rotatably mounted in the lower end of said Gylinder, a stud carried by said disk for engagement with the stud of the adjacent tumbler, springs embedded in the side of the said pintle for engagement with the tumblers to frictionally retain the tumblers in position, and a shackle having serrated ends for engagement through the cover and through the slots formed in the edges of the tumblers.

2. A device of the class described comprising a cylinder, a pintle centrally disposed in said cylinder, a plurality of tumblers mounted about said pintle, springs carried by said pintle for engagement with said tumblers, a disk mounted in the lower end of said cylinder, studs carried by said tumblers and said disk for imparting rotation between the same and a shackle having serrated extremities inserted in said cylinder for engagement with said tumblers.

In testimony whereof we allix our signatures, in presence of two witnesses.

NOAH T. FOSTER. BERTHA M. DRESKA.

Vitnesses J. FRED GILSTER, RALPH E. SPRIGG.

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