US903647A - Lock. - Google Patents

Description

J. WHITE.

LOCK.

APPLICATION FILED MAY 15, 1908.

Patented Nov. 10, 1908.-

FIG. 4

INVENTOR J. WHITE 0., was nmcmu, u. c.

UNITED STATES rarianir marten.

JOHN WHITE, OF OHARLOTIETOWN, PRINCE EDWARD ISLAND, CANADA, ASSIGNO R TO HARRY RICHARDS MCLELLAN, OF ST. JOHN, CANADA.

LOCK.

Specification of Letters Patent.

Patented Nov. 10, 1908.

To all whom it may concern:

Be it known that I, J OHN IVHITE, of Charlottetown, in the county of Queens, Province of Prince Edward Island, Canada, have invented certain new and useful Improvements in Locks, of which the-following is a speciiication.

My invention relates to improvements in looks, and particularly to hasp locks, and the objects of my invention are to provide a form of spring lock which will be thrown into releasable engagement with the hasp, by inward pressure thereof, and which may be locked by a simple turning movement of the locking member, whereby both the engaging and locking of the hasp can be accomplished with one hand, further objects being to devise certain improvements relating to the locking mechanism and applicable to locks generally by means of which the tumbler may be more effectively locked in posi tion.

The invention is described more fully in the accompanying specifications and drawings and the features of novelty specifically set forth in the claims.

In the drawings, Figure 1 is an elevation of the exterior of the lock. Fig. 2 is a section along the lines 2-2, Fig. 1. Fig. 3 is an elevation of the rear side of the lock proper with the back of the casing removed. Fig. 41 is a sectional detail showing the key and locking tumblers in engagement with each other. Fig. 5 is a perspective view of one of the spring actuated locking tumblers. Fig. 6 is a perspective detail of the head of the locking member.

In the drawings, like letters of reference indicate corresponding parts in each figure.

Referring to the drawings, A represents the hasp of suitable construction pivoted to the staple 10, and having an elongated aperture 11 near the free end thereof. B represents the lock proper including a casing 12 with a removable back cover 13. C represents the pivotally supported locking member having a shank 1st ournaled in the top and bottom of the casing and a head 15 protruding above the same. This head is formed with an upper edge 16 adapted to normally extend substantially parallel with the aperture 11 and with inclined cam surfaces 17, and 18, on each side thereof, the lower edges of which are adapted, normally, to extend over the edges of the aperture 11,

as shown in Fig. 1, the surface being so formed that when the hasp is inserted over the top edge of the head and pressed downwardly, the cam surface will cause the locking member to turn to permit the same to pass through the aperture 11 until the end of the cam surfaces 17 and 18 are reached when the locking member, under spring actuation, will spring back to the position shown in Fig. 1. The particular curvature necessary on the cam surface on each side of the head, in order to effect the desired movement will be more or spiral in form.

The spring actuation of the locking member may be effected in any desired way, and in the embodiment illustrated, a locking arm D is secured to the shank l-l within the casing having a cam surface 19 thereon against which a spring 20 bears, the spring being supported from a screw 21 extending through the casing.

Means are provided for effecting the locking of the member C, these means being preferably thrown into operation by a simple turning movement of the said menn ber, and in the embodiment illustrated, consisting of a plurality of spring-actuated tumblers 22, 22, 22, 22, pivoted on a screw 23 within the casing, and each having notches 24: adapted to engage a projection provided on the arm I), each of the said tumblers having a separate spring 25 for actuating the same, one end of which 0X- tends into a slot 26 in the tumbler and the said springs being connected to the screw 21 and bearing against the side of the casing.

Each of the tumblers 22 are of different widths and they are so formed that their aperture 24: in each will only be in registration with each other when their outer edges are out of registration. The release of the tumblers is effected through a key E adapted to extend through a suitable key hole 27 and a guiding aperture 28 and being formed with slots 29 and 30 to receive the edges of the longest tumblers, whereby when the said key is turned, it will swing the tumblers about their pivot points, but will always maintain the apertures 2-1- in registration with each other, owing to the fact that the edges of the longest tumblers can extend into the slots 29 and 30. The action of the releasing is shown in dotted lines in Fig. 3.

In order to prevent opening of the look by any other than the designed key, it is necessary to pivot the tumblers sufiiciently close to the edge of the casing to cause the widest tumbler to abut the side of the casing before the projection on the tumbler will be released, and thus, if a key were used which had not the slot to receive the edge of this longest tumbler, the other shorter tumblers would not be moved out of engaged position before the longest tumbler would abut the side of the casing and prevent further movement.

It will be seen that the lock is exceedingly simple in operation, the pressure on the hasp alone serving to throw the spring catch into engagement and then when the head is turned, the projection on the locking arm is brought into engagement with the slots 2% in the tumblers, and when in this position, the head will be at substantially right angles to the aperture 11, in the hasp, and can only be released through the medium of the proper key.

The provision of the separately actuated, spring tumblers, makes it exceedingly diflicult to pick the lock, as to do this, it would be necessary to gage exactly the width and thickness of each of the locking tumblers. It will also be evident that Variations in the thickness and width of the locking tumblers will necessitate diiferent shaped keys.

As many changes could be made in the above construction, and many apparently widely different embodiments of my invention could be made without departing from the spirit or scope thereof, it is intended that all matter contained in these specifications and drawings shall be interpreted as illustrative, and not in a limiting sense. It is also to be understood that the language of the following claims is intended to cover such generic and specific features of the invention herein described, which, as a matter of language, might be said tobe included thereby.

l/Vhat I claim as my invention is 1. The combination with the hasp, of a spring-actuated retaining member therefor, adapted to be sprung into engagement by pressure of the hasp, and means for locking the retaining member.

2. The combination with a hasp, of manually releasable, spring-actuated retaining member therefor, adapted to be sprung into engagement by inward pressure of the hasp.

8. The combination with the hasp, of a rotatable spring locking member adapted to be sprung into engagement by inward pressure of the hasp, and means thrown into operation by the turning of the locking member for locking the same and preventing further movement until released.

4. The combination with a hasp, of a rotatable spring actuated, locking member therefor, an arm on the locking member, and spring-actuated tumblers adapted to engage and lock the same when the said locking member is turned.

5. In a lock, the combination with the reciprocatory, rotatablymounted locking member normally spring-held in releasable engagement, and adapted to remain unlocked so long as its reciprocatory movement is re strained within determined limits, of springactuated locking means thrown automatically into operation by a turning movement of the reciprocatory member in excess of the said determined limits.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

JOHN WHITE. [L. s.] W'itnesses D. EDGAR SHAW, ARTHUR G. PEAKE.

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