US2059698A - Lock - Google Patents

Description

No 3, 1936 E. N YJAcoBl 2,059,769

LOCK

Filed Nov. 9, 1929 A MJF-i i Q9 W Patented Nov. 3, 1936 UNITED STATES PATENT OFFICE Briggs & Stratton Corporation, Milwaukee,

Wis., a corporation of Delaware Application November 9, 1929, Serial No. 406,038

18 Claims.

This invention relates to certain new and useful improvements in locks and refers more particularly to that type used in vehicle door handles and having removable cylinders.

5 lAt present practically all cylinder locks are either of the flat tumbler type or the pin plunger type. The lock of the present invention employs flat tumblers and it is one of the objects of this invention to provide means whereby a cylinder having such at tumblers may be adapted to the mounting member or cylinder case .of a pin plunger type lock.

. Another object of this invention resides in the provision of a lock cylinder having locking tumblers so constructed as to be readily adaptable to different types oi mounting members and to bereadily removable from such different types of mounting members.

Another object of this invention resides in the particular construction of the locking tumblers which permits a cylinder to be turned from its unlocked position without the use of the conventional key.

Where the key to a particular lock hasy been lost and cannot be duplicated, it is desirable that its cylinder be removed, and therefore, it is` a further object of this invention to provide means whereby the cylinder may be removed without the use of the key and without destroying it, pro- 30 viding the lock is in unlocked position, and

whereby a single tool may be employed to withdraw all cylinders of the same type.

And a still further object of this invention resides in the provision of a tool for withdrawing the lock cylinders which is equally adaptable to any and all cylinders of the same type and which has means for positively engaging the cylinder to insure its withdrawal upon outward stress thereto.

which will appear as the description proceeds, my

invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, I have illus- 50 trated one complete example of the physical embodiment of my invention constructed according to the best mode I have so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a transverse sectional view through With the above and other objects in view a vehicle door handle having a lock embodying my invention;

Figure 2 is a cross sectional view taken through Figure 1 on the plane of the line 2-2;

Figure 3 is a cross sectional View taken through Figure 1 on the plane of the line 3 3;

Figure 4 is a perspective view of the lock cylinder removed from the mounting member; and

Figure 5 is a fragmentary perspective view of the mounting member per se.

Referring now more particularly to the accompanying drawing, the numeral 5 designates a vehicle door handle of conventional tubular construction having an internal mounting plate 6 to which a tubular Vcasing. I is secured to extend rearwardly and provide the stem of the handle. The casing 1, as best illustrated in Figure 5, has oppositely extending ears B which provide the means for securing the casing to the mounting plate, and its rearmost portion is reduced, as at 9, to receive the adjacent end of a square actuating shaft I through which the movements of the handle are imparted to the door latching mechanism, not shown, to permit the door to be opened and closed in the customary manner. .Y

The inner end of the shaft I0 is enlarged, as at II, and projects av short distance into the casing 1. A transverse opening I2 extending diametrically through the shaft end II and the adjacent portion of the casing I to slidably receive a locking pin I3 which is either projected outwardly beyond the periphery of the casing and into a suitable recess formed in an escutcheon plate I4 to lock the handle against movement when desired, or is retracted from the recess to permit unrestricted Yturning of the handle.

The position of the locking pin I3 is controlled by a lock cylinder I5 rotatably mounted within the. casing l, which forms a mountingmember for the lock cylinder. The connection between the lock cylinder I5 and the pin I3 consists of an eccentrically positioned stud I6 projecting from the innermost end of the cylinder into a transverse slot II in the pin I3, so that rotation of the cylinder imparts movement to the pin, as will be readily apparent.

The outermost end of the locking cylinder I5 is enlarged, as at I8, and is received in an opening I9 in the handle 5, and the medial portion of the cylinder is provided with a plurality of transverse movable locking tumblers 20, of novel construction to be later described, and which are normally yieldably urged to operative position by springs 2'I in the conventional manner.

It is well known that the ends of the tumblersv opposite their operative ends move outwardly be# yond the periphery of the cylinder Vduring inser-` tion and withdrawal of the key and in the conventional tumbler type lock this movementof the tumblers is accommodatedby a second recess in the mounting member casing dia'metrically opposite the recess 25. l

However, as the present invention contemplates the adaptation of a lock cylinder employing rflat tumblers to mounting members used forpin type locks, the rear or inactive ends of the tumblers are partially cut away, as at 26, leaving a projecting tip 21. The necessary movement of the tumblers could be accommodated by continuing the cut away portion 25 across their entire'width, but if this were done it would be possible to'withdraw the key after the cylinder had been turned only partially from its locked position. This condition is undesirable and is prevented by the projecting tip 21.

The tips 21, when the cylinder is in its locked position, align with a narrow longitudinal groove 28 formed in the mounting member casing 1 opposite the recess 25 and extended inwardly into the casing a distance suicient to encompass all of the tumblers. The groove 28 thus receives the projecting tips 21 of the tumblers and'accommodates their movement incidental tothe insertion and withdrawal of the key.

When turned to fully unlocked position, which is substantially degrees from its locked position and is the position of the cylinder in Figures 1 and 2, theoperative ends 22 off all of the tum-` blers, except the forward tumbler, are retained in retracted position by the engagement of one of their projecting ends 24 with the'inner peripheral wall of the casing 1. 'I'he forward tumbler, however, is permitted movement bythe action of its spring 2| by the provision of a short recess 29 adjacent the recess 28 which extends inwardly only far enough vto receive the forwardtumbler.

'I'he forward tumbler thus moves to a position with its V shaped end straddling the projection 30 between the grooves 28 and29, and in this manner yieldably holdsthe cylinder in its unlocked position. When it is desired to move rthe cylinder from its unlocked positionY it is only necessary to apply a slight turning force which causes one of the angular sides'of the cut away portion 23 to cam itself over the projection 30 and force the forward tumbler inwardly. 'Ihe width of the slots 28 and 29 are such that the leading projection 24 of the tumbler is moved beyond the groove before its other end 24 leaves the projection 30. It is therefore readilyfapparent that the cylinder may be moved either to its fully locked position or beyond its normal unlocked position forv the purpose of withdrawing the cylinder, as will be later described, without the use of the conventional key.

The cylinder |5 is secured against withdrawal from the mounting member 1 byraspring ring 3| substantially encircling the casing or mounting member 1 and having an inward projection 32 at one end thereof extended through an aperture 33 in the mounting member to lie within an annular groove 34 formed in the cylinder in line with the opening 33 when the cylinder is in operative position.

During the normal movements of the lock cylinder the spring remains undisturbed and eiectively secures the cylinder against withdrawal and when it is -desired to remove the cylinder those authorized and having proper knowledge of the locks construction, may do so by inserting a special tool 35 into the key receiving opening 36 of the cylinder. The tool 35 has a relatively narrow straight portion 31 from which an angularly disposed end 38 projects, the width of the portions 31 and 38 being suiciently narrow to permit the insertion of the tool through the key opening 36 and through the openings 39 in the locking tumblers without affecting their positions.

The innermost end of the key receiving opening'36 has an extension provided with a tapered bottom wall 40, the end of which terminates in the annular .groove 34 so that the end 38 of the tool 35 upon its insertion into the cylinder is directed into and held in a position at which its extreme end projects across the annular groove 34 ush with the outer periphery of the cylinder. Turning of the cylinder by means of the tool 35 engages the extreme end of the tool with the spring projection 32, as illustrated in Figure 3, to force said portion of the spring out of the annular groove 34 and permit withdrawal oi' the cylinder. f

It is also noted that the tool 35 is provided wit a shoulder 4| adjacent the juncture between its medial portion 31 and the angularly directed end portion 38, which aligns with and engages behind a wall 42 extending across the key opening 36 of the cylinder to provide a positive connection between the tool and the cylinder and thus facilitates the withdrawal of the cylinder by outward stress applied to the tool.

An outer sleeve 43 preferably surrounds the mounting member 1 and the spring 3| to provide a more finished appearance.

From the foregoing description, taken in connection with the accompanying drawing, it will be readily apparent to those skilled in the art to which an invention of the character described appertains, that I provide a novel construction for locks of the character described which permits a cylinder having at locking tumblers to be employed with mounting members of locks of the pin plunger types, wherein the cylinder may be freely turned from unlocked position without the use of a conventional key, and wherein the cylinder is readily removable from the mounting member by a tool equally adaptable to all cylinders of a common type.

What I claim as my invention is:

l. In a lock structure, a mounting member, a lock cylinder movable in the mounting member, locking tumblers adapted to restrain movement of the lock cylinder when in a predetermined position, said tumblers being retractable by a proper key to free the cylinder for movement to another position, means including one of the locking tumblers for maintaining the lock cylinder in said second position, and said tumbler being so shapedv as to permit mo-vement of the lock cylinder from said second position Without the use of a key.

2. In a lock structure of the character described, a mounting member, a lock cylinder movable in the mounting member between locked and unlocked positions in the performance of its normal locking functions, locking tumblers of the at type carried by the lock cylinder and cooperating with the mounting member to prevent movement of the lock cylinder when in locked position, and one of said tumblers having a portion shaped to cooperate with the mounting member to yieldably restrain movement of the lock cylinder when in unlocked position, said portion of the locking tumbler causing the same to move to inactive position upon movement of the lock cylinder away from unlocked position.

3. In a lock structure of the character described,

a bored mounting member having spaced recesses in communication with its bore to dene a central projection, a lock cylinder movable in the bore to and from unlocked position in the performance o-f its normal locking functions, a locking tumbler carried by the lock cylinder, said locking tumbler being bifurcated at one end to provide spaced projections which engage on opposite sides of the central projection when the lock cylinder is in unlocked position, and said spaced projections being so shaped as to cause the locking tumbler to move to inactive position upon forced movement of the lock cylinder away from unlocked position.

4. In a lock structure of the character described, a bored mounting member having spaced recesses in communication with its bore to provi-de a central abutment, a lock cylinder movable in the bored mounting member to and from unlocked position in the performance of its normal locking functions, .a locking tumbler carried by the lock cylinder, and means yieldably urging one end of the locking tumbler beyond the periphery of the lock cylinder, said end of the locking tumbler having a substantially V shaped cut to provide spaced projections which strad-dle the central abutment when the cylinder is in unlocked'position to yieldably restrain movement of the cylinder from said unlocked position,

5. In a lock structure of the character described, a bored mounting member having a tumbler receiving recess in communication with its bore, a lock cylinder movable in the mounting member bore, a locking tumbler carried by the lock cylinder, means yieldably urging one end of the locking tumbler beyond the periphery of the lock cylinder whereby said end of the locking tumbler engages in the mounting member recess when the lock cylinder is moved to a predetermined relative position with respect to the mounting member to yieldably restrain movement of the lock cylinder from said position, and said end of the locking tumbler being so formed as to cam itself out of the recess upon forced movement of the lock cylinder from said position.

6. In a lock structure of the character described, a mounting member having a tumbler receiving recess, a lock cylinder movable in the mounting member from locked to unlocked position in the performance of its normal locking functions, a locking tumbler carried by the lock cylinder, means yieldably urging one end of the locking tumbler beyond the periphery of the lock cylinder to engage in said mounting member recess when the lock cylinder is in locked position to prevent movement of the lock cylinder, the locking tumbler being retractable within the periphery of the lock cylinder by the insertion of a key, an abutment carried by the mounting member with which said yieldably projected end of the locking tumbler engages when the cylinder is moved to unlocked position and the key is withdrawn to yieldably restrain movement of the lock cylinder from said unlocked position, and said end of the locking tumbler being so shaped as to cam itself out of engagement with the abutment upon forced movement of the lock cylinder from unlocked position, whereby the lock cylinder may be returned to locked position independent of the key.

7. In a lock device of the character described, a mounting member, a lock cylinder movable therein in the performance of its normal locking functions, means detachably securing the lock cylinder in the mounting member while enabling movement thereof in the performance of its normal locking functions, said detachable securing means upon being disabled releasing the lock cylinder for withdrawal from the mounting member, and means insertable through the key receiving aperture of the lock cylinder for disabling said detachable securing means to release the cylinder for Withdrawal, said last named insertable means being of such size as not to disturb the positions of the tumblers in the lock cylinder.

8. In a lock structure of the character described, a tubular mounting member, a lock cylinder within the mounting member, cooperating means carried by the mounting member and the lock cylinder for detachably securing the lock cylinder in the mounting member, the lock cylinder having a key receiving aperture, locking tumblers operable by a key insertable in said aperture, and means insertable through the key rec eiving aperture to disable said cooperating means upon movement of the lock cylinder to release the lock cylinder for Withdrawal, said means being of such size as not to disturb the positions of the tumblers.

9. In a lock device of the character described, a mounting member, a lock cylinder having a key receiving aperture movable therein in the performance of its normal locking functions, locking tumblers carried by the lock cylinder and operable by a key insertable in said aperture, said locking tumblers having apertures therethrough, means detachably securing the lock cylinder in the mounting member without interfering with its normal locking functions, and means insertable into the key receiving aperture in the lock cylinder and through the apertures in the locking tumblers without affecting their positions for disabling said means to release the cylinder for withdrawal.

10. In a lock device of the character described, a mounting member, a lock cylinder having a key receiving aperture and movable therein in the performance of its normal locking functions, locking tumblers carried by the lock cylinder, said locking tumblers having apertures therethrough, means detachably securing the lock cylinder in the mounting member without interfering with its normal locking functions, means insertable into the key receiving aperture in the lock cylinder and through the apertures in the locking tumblers without affecting their positions for disabling said means to release the cylinder for withdrawal, and said means having a positive connection With the lock cylinder to facilitate withdrawal of the lock cylinder.

11. In a lock device of the character described, a mounting member, a lock cylinder movable therein in the performance of its normal locking functions, the lock cylinder having a key receiving aperture, locking tumblers carried by the cylinder 75 and having apertures in line with the cylinder key receiving aperture, cooperating means carried by the mounting member and the lock cylinder for detachably securing the lock cylinder against withdrawal from the mounting member, a member insertable into the cylinder key receiving aperture and through the locking tumbler apertures Without aiecting their position for disabling said cooperating means, and means for guiding said last mentioned means to operative position upon its insertion into the key receiving aperture.

12. In a lock device of the character described, a mounting member, a lock cylinder movable therein in the performance of its normal locking functions, the lock cylinder having a key receiving aperture, l-ocking tumblers carried by the lock cylinder and having apertures in line with the key receiving aperture, cooperating means carried by the mounting member and the lock cylinder for detachably securing the cylinder against withdrawal from the mounting member, a member insertable through the key receiving aperture and the locking tumbler apertures without affecting their positions for disabling said cooperating means, an abutment on said member, an abutment carried by the lock cylinder with which said member abutment engages to facilitate the application of outward stress to the lock cylinder, and means for guiding said member into operative position upon its insertion into the key receiving aperture.

13, A locking tumbler for use with cylinder locks forme-d of a ilat piece of metal, and having a key receiving aperture, and a V shaped cut in one end to provide spaced projections.

14. In a lock structure of the character described, the combination with a mounting member adapted for use with a lock cylinder having pin type plungers, of a lock cylinder interchangeable with the pin type cylinder, and including flat locking tumblers, said flat locking tumblers having pr-ojections engageable with an abutment in the mounting member toyieldably retain the cylinder in one of its positions.

l5. In a lock, a mounting member, a lock cylinder therein and having a locked position from which it is movable upon insertion of a proper key, means fo-r detachably securing the cylinder in the mounting member, said means being movable to inactive position to release the cylinder for withdrawal when in a predetermined position of movement, means for moving the cylinder from any but locked position to said predetermined position without the key, and means whereby the securing means is disabled upon movement of the cylinder to said pre-determined positi-on by said moving means.

16. In a lock structure of the character described, a lock cylinder, tumblers carried by the lock cylinder and yieldably urged to project one end outwardly thereof, a mounting member for said lock cylinder having a recess into which all of the tumblers project to positively restrain movement of the cylinder, said tumblers being retractable out of the recess by a proper key to free the cylinder for movement, the mounting member having a second recess adapted to receive the projected end of one tumbler upon alignment' therewith and withdrawal of the key, the remaining tumblers being held in retracted position by the mounting member, and cooperating means carried by said tumbler and the mounting member for camming said tumbler out of said second mounting member recess upon rotation of the lock cylinder whereby said tumbler yieldably restrains movement of the cylinder when engaged with said second recess. v

17. In a lock structure of the character described, a l-ock cylinder, a plurality of tumblers carried by the lock cylinder and yieldably urged to project one end outwardly thereof, said end of the tumblers being medially cut away to provide spaced projections, a mounting member having a recess into which the said ends of all of the locking tumblers project to positively restrain movement of the cylinder, said tumblers being retractable out of the recess by a proper key to free the cylinder for movement, the mounting member having a pair of spaced recesses removed from said first mentioned recess into which the spaced projections on the said end of one of the tumblers extend upon alignment therewith and Withdrawal of the key, said tumbler being movable into the lock cylinder by the engagement ofY its cut away medial portion with thev mounting member part between said spaced recesses whereby the engagement of the spaced projections in the spaced recesses yieldably retains the lock cylinder against movement.

18. In a lock structure including a mounting member and a lock cylinder provided with a keyslot and having a plurality of locking tumblers adapted to restrain the cylinder against movement in the mounting member, said tumblers being retractable to free the cylinder for movement upon the insertion of a proper key into the key slot, normally operative means for removably securing the lock cylinder in the mo-unting member, said means being adapted to be disabled to release the cylinder for withdrawal by a tool inserted into the key slot with a part engageable with said normally operative securing means upon movement of the cylinder to a predetermined position, the lock cylinder being movable to said predetermined position by the tool from any but locke-d position and the tool having a h-ook engageable with a portion of the cylinder to facilitate withdrawal of the cylinder, and means for guiding the tool to its operative position with its said part in position to engage the normally operative securing means and its hook in engagement with said cylinder part.

EDWARD N. JACOBI.

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