US2004746A - Lock - Google Patents

Description

P. BOYKO June: 11', 1935.

' LOCK Filed March 23', 1932 INVENTOR PETER BOYKQ Patented June 11, 1935 UNITED STATES PATENT OFFICE Application March 23,

1 Claim.

The invention relates to locks which require for their successful manipulation in throwing the bolt into unlocked position a necessity of employing not only the proper key in case a 5 key-controlled form of the invention is em ployed, or the knowledge of the proper combination in case a combination form of the device is used, but also requires a knowledge on the part of the operator as to how the key or controlling knob of the combination must be rotated in order to throw the bolt.

Accordingly, the primary object of the invention is to provide a simple form of safety lock which can be fitted to opposite sides of doors and other supports having different thicknesses and which can be readily operated by a person who has the knowledge as to how the proper control agency, be it either key or combination control knob, should be actuated.

Still another object of the invention is to provide such form of dual controlling feature lock which can be readily reorganized so as to change its tumbler arrangement and thus work with a different form of key or with a different dial combination.

Broadly these objectives are attained by providing a two part construction fitted to opposite sides of the door. One part comprises a tumbler barrel which may be either key actuated or dial controlled as is well known inlocks of this character, and the other part providing a lock casing containing a sliding bolt. The bolt is actuated by a break toggle arrangement of levers contained in the casing, one pivoted to the bolt and the other pivoted in the casing and actuated from a connecting bar in turn actuated from the tumbler barrel. The levers are arranged in such way that the barrel controlled lever is free to turn in either direction idly and without throwing the bolt when the controlling barrel is indiscriminately rotated by an unauthorized person, or even by a person who has the proper key or knows the proper combination to operate the barrel. The disclosure features a construction of the operating levers organized so that a notch in the end of one can be rotated into engagement with the end of the other and then by a reverse movement of the barrel when this end to end engagement has been effected will shift the bolt into its unlocking position.

Various other objects and advantages of the invention will be in part obvious from an inspection of the accompanying drawing and in part will be more fully set forth in the follow 1932, Serial No. 600,588

ing particular description of one form of mechanism embodying the invention, and the invention also consists in certain new and novel features of construction-and combination of parts hereinafter set forth and claimed.

In the accompanying drawing:

Fig. l is a view partly in vertical section of a preferred embodiment of the invention with part of the cover plate of the lock casing removed, to expose to view the bolt and associated parts; and with part of the casing broken away to expose the rear or inner end of the actuating knob; and showing the parts in full line with the bolt in locked position;

Fig. 2 is a view of the inside of the removable cover plate; i

Fig. 3 is a view corresponding to the showing in Fig. lwith the cover plate in position; the bolt shown in dotted outline and shifted into its unlocked position and viewing the lock casing from the side engaging the support as show in Fig. 4; and v Fig. 4. is a transverse sectional view taken through the casing on the plane indicated by the line 4-4 of Fig. 3 and showing the casing assembled on one side of a support-in operative engagement with the tumbler barrelinset into the opposite side of the support.

Itis understood that the device herein disclosed comprises two major parts; a'lock casing in and a tumbler barrel H, mounted in position on asupport l2, such as a door shown in Fig. 4., and preferably inset into opposite faces of the support as is well known in mounting locks of this character in place.-

In the illustrated form of the invention the barrel H includes the. usual tumbler controlled cylinder l3 which'is rotated when the proper key M is inserted into the key slot l5 access to which is provided on the outside of the support 12. While the device has been disclosed in connection with this type of tumbler controlled barrel, it is understood that barrel Il may be of the dial controlled type in which the barrel I3 is rotated only when an exposed dial knob has been rotated the prescribed number of degrees and in the prescribed direction for which the combination is set as is usual with safe locks. In either case, when the barrel is prop erly rotated it in turn rotates a spacing'bar I6 which projects towards and into the lock casing ID as hereinafter described. It isunderstood that the spacing bar I6 is of the usual length so as to reach between the major parts when mounted in supports l2 of varying thicknesses and that any excess in length of the spacing bar may be out off if necessary in mounting the lock in place.

The lock casing l0 comprises essentially a hollow box I'i opened along its inner side which inner side is closed by means of a cover plate [8. The casing as a whole is mounted on the inner side of the support l2 by means of screws passed through the screw apertures 19 in the casing and cover plate. The cover plate 18 is provided with an opening 20 extending therethrough'and which opening provides a bearing for the hub 2| of a notched end lever 22 which extends laterally across the inner side of the cover plate l8. It is a feature of this disclosure that when the cover plate I8 is removed it carrice with it the notched lever and can thus be removed from the lock casing without necessity; of disconnecting the lever from any of the bolt actuating parts carried by the casing and herei aiter described. The casing is provided with guidebars 23 formed integral with its bottom and slidably mounted on these bars is a bolt This bolt is provided with projecting fingers 25 designed to engage in apertures in keepers 26 secured toa mounting plate 21 as is usual in constructions of this character. The bolt is normally urgedinto its locking position by means of spring 28. d

Pivotally mounted on one side of the bolt 24 is a thrust member 29 provided on opposite sides with balancing springs 30 and 31 which tendnormally to maintain its free end 32 in the path of rotary movement of the lever 22. The end oi the lever 22 is provided at its free end with an angularly disposed notch 33 higher on one side than on the other as particularly shown in Figs. 2 and 3. Hub 2| of lever 22 is provided at its center with a bar slot 34 into which is intruded the end of bar l6 as particularly shown in Fig. 4. The inclination of the sides forming the slot 33 are so disposed that when thelever. 22 is rotated in anti-clockwise direction a s indicated in dotted lines in Fig. l, the lever simply bears against the upper side of the thrust member and working against spring 3i simply moves idly past the lever when turned in this'direction without affecting the thrust member and without affecting the position of the bolt. It is likewise true that the lever 22 can be rotated in a clockwise direction and in the absence of knowledge as to where it should be stopped this rotary movement, it can simply be turned idly and will similarly pass the thrust member without shifting the bolt 24 when turned in this direction. However, if the key l4 or the controlling dial'of the combination controlled barrel be rotated carefully in the di'rectionto turn the lever 22 in Fig. 1 in a clockwise direction and until the notched end has shifted to a position where thefree end of the thrustmember is in engagement with the slot 33 the parts will then be in the position indicated in the upper dotted line showing in Fig. ;-1 and in the showing in Fig. 3. Then by a reverse oranti-clockwise movement of the key n-dial knob the-notched end 33 of the lever 22 bears endwise against the thrust member 29 to shift the'same from the upper, dotted line position shownin Fig. 1 into the unlocked dotted line position shown in Fig. 3. It will be seen that the-lever 22 andthrust member 29 form in effect atoggle-construction, as shown in Fig. 3, whichtend to straighten out as rthelever 22 is rotated counter-clockwise thus shifting-the bolt into its unlocking position against the tension of its return spring 28.

Rerotating level 22 clockwise from its position shown in Fig. 3, releases tension on the thrust member and permits the spring 23 to restore the lock to its normal locking position shown in Fig. 1. As soon as the thrust member is free from the pressure of the actuating lever 22 the springs 30 and 3| act to restore the thrust member into its normal inoperative position with the end 32 projecting towards. the hub .22 as shown in full lines in Fig. 1. 4

It is understood that the lock casing may contain other features such for'instance as the bolt shifting knob 38 mounted for rotary movement in thebottom of casing l0 and provided on its inner side with a finger 35 designed to bear on shoulder, 36 of the bolt to shift the bolt into open position against the tension of spring 28. The casing may also be provided with a manually controlled plunger 39 for locking the bolt in its unlocked position, as shown in Fig. 3. A screw 40 passed through aperture 4| in cover plate itand engaging in spacing lug 42 acts to secure the cover plate to the casing.

In marketing devices of the. type-herein disclosed, it is possible to manufacture the lock casing and its contained parts as a standard unit which can be combined with tumbler barrels of different types and wherein the tumblers can be rearranged as is well known in tumbler locks of this character. As the spacing bar I6 can accommodate itself to varying distances at which the lock casing and barrel may be spaced apart, it is possible to mount the. construction herein disclosed in doors and other parts of various thicknesses and even on a support so thick that it would be impractical to provide a key sufiicientlylong to extend through the same to engage the lock casing. It is, of'course, possible to change the tumbler combination so that the device can be operated with a key differing from the key originally used and this resetting of theytumbler parts can be attained without making any change in or even dismounting the bolt containing casing. It is noted that the hub 21 is mounted fixed axially relative to the :axis about which it turns and there is thus assured a registering of the free ends of lever 22 and the thrust lever which is in no way dependent upon the accuracy of fit of the controlling key [4 in its slot l5 and, in fact is in no way dependent uponthe key except insofar as thekey controls the rotation of the barrel in which it is contained.

I claim:

A look including a casing in the form of a hollow-box open at its inner side, said box provided on the inner side of its bottom with integral guide barsand with an integral bolt :stop, abolt slidablyxmounted in the guide bars and provided with projecting fingers, a bolt spring acting on the bar and urging'it towards said stop, a manually actuated bolt shifting knob mounted for rotary movement in, and extending through the bottom of the 'box and :provided with a lever adapted to engage the bolt for moving it into its open position against the tension of said spring, apointed end lever pivotally mounted on the side of the bolt facing the open side of the box and constituting :a thrust member, a pair of studs positioned on opposite sides 10f the axis of rotation 'of -1th6 lever, a-pair-of balancing springs'with on'eend of each coiled about one of the studs and having their free ends bearing on opposite sides of the thrust lever, a cover plate for closing the open side of the box, a notched end lever provided with a hub journalled for rotary movement about a fixed axis in the cover plate, said hub provided with a slot adapted to receive a spacing bar of a tumbler lock, said lever extending across the inner side of the cover plate and removable bodily therewith without afiecting the bolt and its associated parts carried by the box, the free end of said lever provided with an angularly disposed notch higher on one side than on the other to form a shoulder and disposed when the lever is rotated in one direction to bear on the thrust lever and move past the same and when moved in the opposite direction to cause the end of the thrust member to engage in said recess and when reverse therefrom to engage said shoulder to shift the bolt into its open position and against the tension of the bolt spring.

PETER BQYKO.

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