US3718015A

US3718015A - Lock set handle

Info

Publication number: US3718015A
Application number: US00126037A
Authority: US
Inventors: J Tornoe; R Marotto
Original assignee: Schlage Lock Co LLC
Current assignee: Schlage Lock Co LLC
Priority date: 1971-03-17
Filing date: 1971-03-17
Publication date: 1973-02-27
Anticipated expiration: 1990-02-27

Abstract

A lock set handle for use with a lock set spindle rotatable about an axis has a handle body with a cavity adapted to receive the spindle and has driving means engageable with the spindle. Disposed eccentrically of the axis are means interengaging the driving means and the handle body for preventing relative rotation of the driving means and the handle body with respect to the axis. For a reversible handle, the interengaging means interlocks in either of two diametrically opposite positions.

Description

United States Patent [1 1 Tornoe et al.

[ 51 Feb. 27, 1973 LOCK SET HANDLE [75] Inventors: John Axel Tornoe; Robert Anthony Marotto, both of Redwood City, Calif.

[73] Assignee: Schlage Lock Company, San Francisco, Calif.

[22] Filed: March 17, 1971 [21] Appl. No.: 126,037

[52] US. Cl. ..70/224, 292/347, 292/350, 292/352 [51] Int. Cl. ..E05b 3/04 [58] Field of Search ..292/347, 350, 352; 70/224, 70/216 [56] References Cited UNITED STATES PATENTS 2,675,692 4/1954 Welch et al. ..70/224 8/1935 Hurd ..70/224 8/1942 Schlage ..292/347 Primary Examiner-Albert G. Craig, Jr. Artorney-Lothrop & West [57] ABSTRACT A look set handle for use with a lock set' spindle rotatable about an axis has a handle body with a cavity adapted to receive the spindle and has driving means engageable with the spindle. Disposed eccentrically of the axis are means'interengaging the driving means and the handle body for preventing relative rotation of the driving means and the handle body with respect to the axis. For a reversible handle, the interengaging means interlocks in either of two diametrically opposite positions.

5 Claims, 29 Drawing Figures LOCK SET HANDLE Lock sets, particularly for use on building and dwelling doors, sometimes are operated by rotatable, generally symmetrical, usually spherical doorknobs and sometimes are operated by rotatable, generally asymmetrical, radial levers. Both kinds of actuators may be referred to as handles and in some instances can be used interchangeably. In other instances, there are difficulties in simply replacing a knob with a lever although a lever can usually be easily replaced with a knob. Most lever configurations are asymmetrical or offset about a vertical plane containing the rotational axis of the lock set. This requires reversal of the lever between left-hand and right-hand door installations. The requirement may be further complicated when the lever handle is not symmetrical about a horizontal plane containing the rotational axis of the lock set.

Most modern look sets are provided with a rotatable, hollow or tubular spindle projecting from the face of the door and rotatable about an axis normal to the door plane. The spindle includes at least one longitudinal notch and sometimes two opposite notches extending along the spindle. The spindle often is inclusive of a spring-pressed detent mechanism normally securing the door handle in position on the spindle but permitting release of the door handle from the spindle under appropriate circumstances. For structures of this general sort, attention is directed to W. R. Schlage U.S. Pat. Nos. 1,579,457 of Apr. 6, 1926; 1,944,470 of Jan. 23, 1934; 2,294,213 of Aug. 25, 1942; 2,299,180 of Oct. 20, 1942 and 2,301,751 ofNov. 10, 1942.

It is therefore an object of the invention to provide a lock set handle for use with a spindle rotatable about an axis in which the handle can readily be mounted on and withdrawn from the spindle whether the handle is of a circular knob configuration or is of a lever configuration.

Another object of the invention is to provide a lock set handle which can readily be reversed so as to be utilized on both left-hand doors and right-hand doors.

Another object of the invention is to provide a lock set handle in which the extra torque which can be exerted on the. spindle by a lever design handle is readily withstood by the connecting mechanism so that the handle cannot be easily wrenched off or the lock set injured by unauthorized means.

A further object of the invention is to provide a lever design lock set handle having a relatively slim center section that is nevertheless capable of resisting large amounts of torque.

A further object of the invention is to provide a lock set handle which will properly actuate a spindle whether the handle is a circular knob or is a lever.

Another object of the invention is to provide a lock set handle of an improved and superior kind.

Other objects, together with the foregoing, are attained in the embodiments of the invention described in the accompanying description and illustrated in the accompanying drawings, in which:

FIG. 1 is an elevational view of a door panel and a door jamb, portions being broken away, showing a lock set installed therein and provided with a handle of the lever type pursuant to the present invention;

FIG. 2 is a view similar to FIG. 1 but illustrating the lock set handle pursuant to the invention applied to a door of a hand opposite to that of FIG. 1;

FIG. 3 is a view to an enlarged scale of the reverse side of the lock set handle shown in FIG. 1, certain portions being omitted or broken away for increased clarity, the view being an elevation on a vertical transverse plane;

FIG. 4 is a cross section, the plane of section being indicated by the line 4-4 of FIG. 3;

FIG. 5 is a view similar to FIG. 4, the plane of section being indicated by the line 5-5 of FIG. 3;

FIG. 6 is a variation in a portion of FIG. 5 showing a modified form of retaining mechanism;

FIG. 7 is a cross section similar to FIG. 5 but showing adjacent parts in assembled relationship with the handle unit;

FIG. 8 is an end elevation of a trim plate appearing in FIGS 4, 5 and 7;

FIG. 9 is a cross section through the trim plate, the plane of section being indicated by the line 9-9 of FIG. 8;

FIG. 10 is a cross section on an axial transverse plane, indicated bythe line 10-10 of FIG. 11, through a driving member utilized in the lock set handle mechanism;

FIG. 11 is an end elevation of the drivingmember shown in FIG. 10;

FIG. 12 is a plan of a keeperplate;

FIG. 13 is a cross section, the plane of whichis indicated by theline 13-13 of FIG. 7;

FIG. 14 is a side elevation of a screw pin;

FIG. 15 is an end elevation of the screw pin of FIG. 14;

FIG. 16 is a view somewhat similar to FIG. 3 but showing, in large scale, a modifiedforrn of lock sethandle construction;

FIG. 17 is a cross section, theplanes of which are indicated by the lines 17-17 of FIG. 16;

FIG. 18 is a detail showing a modified portion of the construction, the figure being taken within the zone 18-18 ofFIG. 17;

FIG. 19 is a view comparable to FIG. 16 but showing a further modified form of lock set handle construction pursuant to the invention;

FIG. 20 is a sectional view of the structure shown in FIG. 19, the planes of section being indicated by the lines 20-20 of FIG. 19, certain structures being broken away to disclose the interior arrangement;

FIG. 21 is an enlarged detail of one of the retaining structure of FIG. 19;

FIG. 22 is an end view of the enlarged structure shown in FIG. 21;

FIG. 23 is a view comparable to FIG. 16 but showing a further modified form of lock set handle pursuant to the invention, the handle being shown without adjacent parts;

FIG. 24 is a cross section, the plane of which is indicated by the line 24-24 of FIG. 23 showing the bandle with some of the adjacent parts;

FIG. 25 is a cross sectional view of the handle of FIG. 23, the plane of the cross section being indicated by the line 25-25 of FIG. 24;

FIG. 26 is a detail in axial cross section of the driving sleeve shown in FIGS. 24 and 25, the plane of section being indicated by the line 26-26 of FIG. 27;

FIG. 27 is an end elevation of the driving sleeve shown in FIG. 26;

FIG. 28 is a cross section of a trim body shown in FIG. 24; and

FIG. 29 is an end elevation of the trim body shown in FIG 28.

In a typical installation, a lock set handle pursuant to the present invention is utilized in connection with a lock set 6 of the customary sort installed in a swinging door panel 7 movable with respect to a door frame 8 or jamb. The mechanism of the lock unit is not critical but does involve a spindle 9 rotatable about an axis 10 for withdrawing a bolt 11, which may be a latch bolt, from a strike box 12. Usually there is afforded a locking cylinder unit 13 having a keyway 14 therein. Designed to actuate the lock set, the cylinder unit 13 turning therewith, is a lock set handle 16 in the form of a two cusped lever. In the present instance, the form of the lever is symmetrical about a horizontal plane through the axis 10, is arranged for convenient hand grasping and is directed generally away from the frame 8 or jamb to leave adequate room for angular swinging or rotation. Either the lower cusp 17 of the lever is moved right or left to produce rotation about the axis 10 or the upper cusp 18 of the lever 16 is moved clockwise or counterclockwise about the axis 10 to produce, rotation effective to withdraw the bolt 11.

The lever 16 is utilized not only for rotation but also as a pushing or pulling device to move the door panel 7 to and fro. Customarily, the lever 16 is spaced far enough away from the face of the panel 7 so that the users hand can easily fit around either of the cusps 17 or 18 or even so that his wrist or forearm may be interposed between the handle and the door panel.

As shown in FIG. 2, the relationship of the handle and cylinder unit is reversed when the door panel 21 swings from the frame 8 or jamb in the opposite hand. The parts are inverted from the showing in FIG. 1 except that the cylinder unit remains upright; i.e., the handle and connected parts are reversed with respect to the cylinder unit 13. Thus the keyway 14, which is not symmetrical about a horizontal, axial plane remains upright and has the same position it has in the FIG. 1 installation. .The cylinder unit is relatively rotated with respect to the other portions of the lock set which remain the same even though inverted.

The tubular or hollow spindle 9, rotatable about the axis 10, is connected in a known way to the bolt actuating mechanism. Upon rotation of the spindle 9 in either direction the bolt 11 is properly retracted. The spindle 9 is of the sort shown in the mentioned Schlage patents and in this instance includes a pair of diametrically opposite,

longitudinal slots

26 and 27. The spindle also carries a radially extending, spring-pressed detent slide not shown herein but disclosed in the mentioned Schlage patents and effective as a longitudinal retainer for the handle mechanism mounted on the spindle. The handle mechanism is released when the detent is pressed against the urgency of the spring into the interior of the spindle.

The handle 16, comprised of any suitable material, such as metal, wood or plastic, in its central region is relatively thin and is only slightly enlarged to embrace a cavity 29 designed easily to accommodate the extremity of the spindle 9. The cavity opens to the outer face of the handle through a circular aperture 31 leaving a circular shoulder 32 of a diameter sufficient to position the cylinder unit 13.

Since, as particularly shown in FIG. 7, the cylinder unit 13 is customarily formed with an asymmetrical wing 33 or flag, the handle cavity 29 is enlarged to afford a recess 34 extending radially and axially to accept the wing 33 or flag. To permit a reversal of the handle, as shown in FIGS. 1 and 2 without inverting the cylinder unit, there is a similar recess 36 communicating with the central cavity 29 and extending diametrically opposite to the recess 34. With this arrangement, the flag 33 or wing on the cylinder unit can be disposed in either one of the

slots

26 and 27 in the spindle 9 and can occupy either of the

recesses

34 or 36 to keep the flag or wing 33 upright in either orientation of the spindle or of the handle.

To connect the handle with the spindle for rotation together about the axis 10 and to provide a strong resistance to any rotationally disruptive force despite the slim central portion of the handle, there is provided a driving member 38 (FIGS. 10 and 11). This is a generally circular cylindrical body continuous except for a slot 39 extending throughout the length thereof and of a sufficient width to receive the flag 33 or wing. The driving member has a partially severed and inwardly bent tang 41 designed to interengage with the slot 27 so that when assembled on the spindle the interengagement of the tang 41 and the walls of the slot prevents rotation of the driving member with regard to the spindle. The driving member 38 has oppositely disposed openings 42 to receive the standard, springpressed detent slide (not shown). Adjacent one end the driving member has an out-turned, generally circular flange 43 arranged to abut a transverse planar face 44 formed in the body of the handle.

To interengage the handle and the driving member against relative rotation about the axis, the flange 43 is provided (FIG. 11) with a pair of diametrically opposite notches 46 and 47 into which fit the heads 48 of a pair of screw pins 49 each having a wrenchengaging recess 51 (FIG. 15) and an enlarged body 52. The threaded screw pins are turned into appropriately threaded, handle recesses 53 (FIG. 4). Each is initially installed far enough into the handle so that the enlarged body portion 52 is well below the planar face 44 of the handle cavity. The driving member 38 is then installed with the screw pin heads 48 lying snugly within the notches 46 and 47.

The screw pins 49 and the notches 46 and 47 thus provide interengaging means for preventing relative rotation about the axis 10 of the handle and the driving member, the pins being disposed generally parallel to the axis 10 and being located eccentrically with respect thereto. Not only is relative rotation precluded but the surface 44 precludes relative axial translation in one direction. To preclude translation in the other axial direction, a pair of keeper plates 54 (FIG. 12) is disposed against the flange 43. These keeper plates are identical. Each includes a generally arcuate central portion 55 having a cut-out 56 to accommodate the flag 33 or wing of the cylinder unit. There is also a cutout 57 to afford access to the head 48 of the adjacent screw pin. A retaining tail 58 is designed to extend partially around the cavity of the handle in immediate contact with the flange 43.

To accommodate the keeper plates 54 and to make them particularly effective against displacement, the central cavity 29is symmetrically enlarged laterally to afford shallow, generally circular cylindrical intersecting cavities 59 and 61 large enough to receive the plates 54 and accept parts large enough to be strong despite the thin contour of the handle center. To hold the plates in position against axial translation the handle is further configured to provide undercut, generally circular

cylindrical grooves

62 and 63 adjacent the surface of the plates 54 and of appropriate configuration to receive partial spring rings 64 and 66. These rings are well-known commercial devices. They are first contracted by a special tool, then introduced into the respective cavities 59 and 61 and when in alignment with the

undercut grooves

62 and 63 are permitted to expand and to seat within the grooves. They thus act to block axial movement in one direction of the plates 54.

The assembly is provided with appropriate trim. A trim plate 71, as particularly shown in FIGS. 8 and 9, has a central, circular cylindrical shell 72 at its base merging with a flange 73 and merging with generally circular wings 74 and 75 arranged to fit into similarly shaped marginal recesses 76 at the periphery of the cavities 59 and 61. The shell 72 has a pair of openings 77 to accept a tool for depressing the detent lying within either of the openings 42 so as to release the handle from the spindle. Likewise, the shell 72 has an inturned flange 78 overlying the end of the driving member 38. A portion of the flange 78 is interrupted to provide for an inturned, axially extending tongue 79 lying within the slot 39 in the driving member. Furthermore, the trim flange 78 has a cutaway notch 81 opposite the tongue 79 to pass a stop lug 82 projecting axially from the periphery of the driving member 38.

When the assembled parts are mounted on the spindle of a lock unit, the trim shell 72 extends within an escutcheon flange 83 of the customary sort. More particularly, the stop lug 82 is disposed intermediate a pair of stop projections 84 and 85 (FIG. 13) extending axially into the arcuate path of the stop lug 82 and affixed to stationary parts of the lock unit. Thus, when the handle is rotated in either direction an amount fully to actuate the bolt 11, the stop lug 82 comes into abutment with either of the

stop projections

84 and 85. Further rotational force or torque of the handle is transmitted directly between the lug 82 and the

stop projections

84 and 85 and is properly resisted so that the internal bolt mechanism is not unduly loaded.

It is easy to change the hand or orientation of the handle between right-hand and left-hand simply by removing the handle from the spindle 9 and then temporarily removing the trim plate 71. The heads 48 of the screw pins are then accessible for rotation, clockwise, to drive them farther into their threaded recesses 53 and so remove the heads 48 from engagement with the notches 46 and 47 of the flange 43. When the cylinder unit 13 is removed, the handle 16 and the driving member 38 are rotated relative to each other about the axis for one half a turn. The cylinder unit 13 is then reinstalled with the flag or wing 33 in the opposite recess, say 36. The screw pins 49 are then revolved in a counterclockwise direction until the heads 48 again interengage with the now opposite ones of the notches 46 and 47. The trim plate 71 is restored and the reoriented assembly then pressed onto and latched in place on the receiving spindle 9. The result of this operation is to change the hand or relationship of the handle from that shown in FIG. 1 to that shown in FIG. 2, or vice versa, leaving the cylinder unit always with its keyway in the same position.

If it is desired to disassemble the removed handle mechanism even farther, the securing rings 64 and 66 can be removed by the use of a suitable too]. They are contracted in compass so that they can be lifted out of position. Thereafter, the plates 54 can likewise be removed along with the driving; member 38. The cylinder unit 13 can always be axially lifted out.

In some instances, the ability to disassemble the handle mechanism is not important and the original as sembly can be maintained. An arrangement of this sort is illustrated in FIGS. 16 and 17 in which the construction is approximately as previously shown and described. In this instance, however, the

rings

64 and 66 are omitted as are their receiving, undercut

grooves

62 and 63. The keeper plates 54 are installed as before but now they are held in position by displacement of the material of the handle to provide a locking shoulder 91 pressed down upon the plates 54 so that they are permanently retained in position.

A special form of screw pin 92 may be used. In this instance, the pin 92 is not provided with threads although it retains a reduced head 93 and an enlarged body 94. Abutting the body is a coil spring 96 seated in the bore 97 in the handle so that the pin is urged outwardly with a small force; In its axially outward posi tion, the reduced head 93 of the pin engages the associated one of the notches 46 and 47 of the flange 43 of the driving member and lies within the cut-out 57 of the adjacent one of the plates 54. Each pin 92 is thus effective to transmit torque. However, the pins are readily disengaged from the flange 43 when it is desired to rotate the handle after removal of the trim plate 71. The pins are momentarily depressed by any appropriate means until the handle is rotated slightly with respect to the driving sleeve. The handle and driving sleeve can then be relatively rotated through a half turn whereupon the spring-pressed pins 92 pop into position again within the other one of the notches 46 and 47 and the cut-outs 57 of the keeper plates 54. The handle, having been reversed, can then be reinstalled as before.

A modification of the pin 92 is disclosed in FIG. 18. The construction otherwise is the same but the enlarged body 94 of each pin, instead of being disposed adjacent a cylindrical head 93 is disposed against a bullet-nosed portion 99. With this arrangement, while torque is transmitted to a reasonable extent, any extraordinary force tending to rotate the handle with respect to the driving sleeve is effective to depress or move the pins axially due to the camming action of the plate 54 against the bullet nose 99. This construction permits a predetermined amount of torque or rotational force to be imposed on the handle and to transmit that amount to actuate the lock mechanism. However, if a larger torque is imposed. upon the removed handle after the cylinder unit has been taken out, the handle simply rotates out of position with respect to the driving unit until the bullet-nose portions 99 again encounter the receiving portions of the adjacent flange 43, whereupon the springs 96 again urge the bullet noses 99 outwardly against the flange.

A somewhat simplified version of the mechanism is shown in FIGS. 19 to 22. In general, the structure is as previously described but in this instance a driving sleeve 106 is provided with a pair of axially extending lugs 107 designed to interfit with accommodating recesses 108 in the material of the handle 109. The handle and the driving sleeve are thus directly connected for rotation together but may be axially separated.

To preclude such separation when unwanted, the driving sleeve 106, also is provided with a pair of lateral apertures 111 and 112 affording a place for the reception of rotary retaining plates 113 integral with axially extending rotary pins 114. Each pin 114 is rotatable about its own axis and is retained in position by a flange 116. The flange is formed at assembly from the surrounding metallic or plastic handle material by a sharp leading corner 117 on an enlarged portion 118 as the pin is initially driven into position. The effect is to displace some of the surrounding material into a groove 1 19 in the pin. Once driven into place the pin, although rotatable, is no longer axially movable. A flange 121 on the pin maintains some separation between the plate 113 and the adjacent handle. The head 113 is in part approximately circular and in part has a flattened portion 122. The pin is made with a screwdriver slot 123.

In the use of this structure, each pin 114 is driven into place and is rotated so that a shallow portion clears the driving sleeve 106. When the driving sleeve is put into position, then by means of a screwdriver the pins 114 are rotated and the eccentric portions of the plates 113 are moved to occupy the apertures 111 and 112 thus effectively precluding any axial movement of the driving sleeve with respect to the handle. Finally, a trim shield 126 is positioned. This has a tight frictional engagement with the adjacent wall 127 of a recess 128 in the central portion of the handle. The marginal wall of the trim shield 126 lies immediately alongside the flats 122 and precludes rotation of the pins 114. The entire assembly is thus held in position.

To change the orientation of the handle with respect tothe driving sleeve, the handle is dismounted from the spindle and the trim shield 126 is removed. The pins 114 are rotated to move the plates 113 out of the apertures 111 and 112. The driving sleeve is then revolved one half rotation (the cylinder unit being removed) and the pins 11.4 are again rotated so as to restore the holding function of the plates 1 13. The cylinder unit and the trim 126 are then reinstalled and the handle is reassembled on the spindle.

In some instances, it is not considered essential that the central portion of the handle be extremely narrow and compact. Rather, at least some of the central handle portion may be enlarged to have substantially a circular configuration. This is shown particularly in FIGS. 23, 24 and 25. The handle 129 has approximately the same outer contour line 130 but on the inner contour has a circular hub 131. The handle body is smoothly swelled to accommodate the central enlargement. The handle has a central cavity 132 substantially as before to accommodate the assembled parts but in addition, is provided with pairs of

lateral recesses

133 and 140.

In this instance, there is employed a driving sleeve '134, as especially shown in FIGS. 26 and 27. This is approximately as previously described, being generally circular cylindrical with a longitudinal slot 135 and having an otherwise continuous flange 136 around one end. There is an upstanding tang 137 adjacent one-end and an axial lug 138 at the other end. The customary openings 139 for the reception of a spring-pressed retaining plate (not shown) are afforded. In addition, the flange 136 at opposite points has down-turned,

axial lugs

141 and 142 so proportioned and disposed as to fit snugly within the recesses 133.

By the lug-recess interengagement, torque on the handle is transmitted directly to the driving sleeve from which torque is transmitted to the spindle as previously described. The driving sleeve when assembled in the handleis retained in place by a circular, split ring 143 like the

rings

64 and 66 and is received in an undercut groove 144 formed in the handle body. Thus, the handle and the driving sleeve are held against any relative axial translation. v

There is also provided a trim body 145 having a central tubular portion 146 merging with a peripheral flange 147 snugly fitting into a groove 148 in the handle body. The trim 145 has a cutaway notch 149 to permit passage of the driving lug 138 of the driving sleeve. The trim likewise has an intumed tongue 151. In this form of device, as with the others, it is easy to detach and partially free or disassemble the driving sleeve and the handle and to reassemble them with the handle rotated a half-tum from its previous position on the driving sleeve so that the reversal illustrated in FIGS. 1 and 2 can be accomplished.

What is claimed is:

1. A lock set handle, for use with a lock set having a spindle rotatable about an axis and having an open-end slot in said spindle, comprising a handle body elongated transversely of said axis and having a circular central cavity centered on said axis and a pair of said cavities open thereto, said side cavities'being disposed on the opposite sides of said axis and aligned in the direction of elongation of said handle body, a driving member at least partly in said central cavity and surrounding said spindle for rotation about said axis, a tang on said driving member slidable in said slot, a pair of means on said handle body each at least partly in one of said side cavities and engageable with said driving member for preventing rotary movement of said driving member relative to said handle body, and means on said body and engageable with said driving member for preventing axial motion of said driving member relative to said handle body.

2. A lock set handle as in claim 1 in which said driving member is engageable with said spindle in but one position of rotation about said axis, and said engaging means interrelates said driving member and said handle body in either of two positions of rotation about said axis.

3. A lock set handle as in claim 1 in which said driving member extends into both of said side cavities and has a longitudinal slot, and a cylinder unit having a circular cylindrical unit body and an axially extending radial projection thereon is disposed with said unit body in said driving member and said radial projection disposed in said spindle slot and in said driving member slot and in either one of said cavities.

4. A lock set handle, for use on a spindle rotatable about a central axis, said spindle having first walls defining a keyway slot and being adapted to receive a detent, comprising a driving sleeve, a tang on said driving said handle eccentrically with respect to said axis and extending into said notch.

5. A device as in claim 4 in which said handle has a recess eccentric with respect to said axis, and a lug,

plate disposed in said recess and engaging said blocking means.

Claims

1. A lock set handle, for use with a lock set having a spindle rotatable about an axis and having an open-end slot in said spindle, comprising a handle body elongated transversely of said axis and having a circular central cavity centered on said axis and a pair of said cavities open thereto, said side cavities being disposed on the opposite sides of said axis and aligned in the direction of elongation of said handle body, a driving member at least partly in said central cavity and surrounding said spindle for rotation about said axis, a tang on said driving member slidable in said slot, a pair of means on said handle body each at least partly in one of said side cavities and engageable with said driving member for preventing rotary movement of said driving member relative to said handle body, and means on said body and engageable with said driving member for preventing axial motion of said driving member relative to said handle body.

4. A lock set handle, for use on a spindle rotatable about a central axis, said spindle having first walls dEfining a keyway slot and being adapted to receive a detent, comprising a driving sleeve, a tang on said driving sleeve extending into said slot and engageable with said first walls, means including second walls forming an opening in said driving sleeve adapted to receive said detent, means including a third wall in said driving sleeve defining a notch eccentric with respect to said axis, a handle having an opening therein adapted to receive said driving sleeve, and blocking means engaging said handle eccentrically with respect to said axis and extending into said notch.

5. A device as in claim 4 in which said handle has a recess eccentric with respect to said axis, and a lug plate disposed in said recess and engaging said blocking means.