Abstract: An electronic parking pawl actuator which uses a smaller motor and higher gear ratio has the ability to configure a rooster comb to engage with various park detents, and reduces the mechanical and software design complexity. Furthermore, the electronic park actuator limits the amount of back drivable range (unable to perform an external park to neutral shift) for theft deterrence, and also allows operation (speed performance) and a lower motor peak current. The electronic parking pawl actuator includes an electric motor, a drive gear, the drive gear operable for being driven by the electric motor, and a drive mechanism, the drive mechanism is operable for being driven by the drive gear. The drive mechanism is engaged with an output shaft of a gear selector of a transmission, and the drive mechanism is rotatable relative to the drive gear, allowing the output shaft to be located in a desired position.

Abstract: A steer-by-wire steering device includes a steering shaft 7; a rotation-restricting member A including an annular main cylindrical portion 1 mounted on the steering shaft 7 and at least one main ridge portion 2 formed on an outer periphery of the main cylindrical portion 1; an engagement member 6 configured to move in proximity to and away from the rotation-restricting member A; and a cushioning member B. The engagement member 6 and the at least one main ridge portion 2 are configured to come in contact with each other through the cushioning member B in conjunction with rotation of the steering shaft 7.

Abstract: A locking device for a motor vehicle having a steering column has a blocking bolt that locks the steering wheel shaft in the steering wheel column, wherein the blocking bolt is movable between a first and a second position, a return element that returns the blocking bolt to the first position, and at least one protection cover that at least partially covers the return element. In the first position, the blocking bolt is in blocking engagement with the steering wheel shaft. In the second position, the blocking bolt is disengaged from the steering wheel shaft. The return element is a torsion spring. The torsion spring is a coil spring with a coil body and a connection hook. A first end portion of the torsion spring has a hook extension, and is inserted into an opening of the blocking bolt and is covered at least partially by the blocking bolt.

Abstract: In an embodiment of the invention, an anti-rotation assembly for a steering column is provided. The anti-rotation assembly includes a bushing and a pin having a detent for engaging the bushing when the pin is inserted into the bushing.

Abstract: A motor cover (80) includes an edge portion (84) located outside an inner side surface of a frame cover (20) with the motor cover (80) being disposed inside a housing chamber (12), configured to push the frame cover (20) wider when the frame cover (20) is mounted onto a frame (10), and configured to be pressed by the frame cover (20) from an opened surface of the frame (10) with the frame cover (20) being mounted on the frame (10).

Abstract: Button comprising a nut (1), a support (3) and a cover (5) fitted on the aforesaid support (3) defining a chamber (6) and having at least one window (51, 52) for an indicator for at least one position chosen from a first position for the button roughly corresponding to a minimum tightening torque for the nut (1) and a second position for the button corresponding to a lower tightening torque than the tightening torque for the first position, with the aforesaid indicator (30) being connected to a plate (13) by a means which ensures that a rotation of the plate (13) is translated into a rotation of the indicator (30).

Abstract: A grilling device with the rotatable lock catch, has a pin module and a rotary shaft joint with two semi-shafts. The upper half shaft of the rotary shaft has a post rod, the lower half shaft of the rotary shaft has a through hole for accommodating the passing in and out of the post rod. The upper end of a supporting shelf of the pin module is disposed with a U-shaped opening for adapting the rotary shaft, two short shafts are respectively disposed by the two sides of the U-shaped opening, two arc-shaped spacing flakes with opposite openings are respectively hinged joint with the corresponding short shafts. A movable ejector pin is disposed on the supporting shelf and along the midline of the U-shaped opening. A pressing board of the middle portion of the ejector pin upward presses the lower portions of the two spacing flakes.

Abstract: An actuation device for a steering lock is operable to selectively lock a rotary steering member against rotation. A lockbolt is movable along a first axis between a steering member-locking position and a steering member-unlocking position. A shuttle is movable between a non-blocking position in which the shuttle does not obstruct movement of the lockbolt from the steering member-locking position to the steering member-unlocking position and a blocking position in which the shuttle obstructs movement of the lockbolt from the steering member-locking position to the steering member-unlocking position. An actuator is coupled to the shuttle and operable to move the shuttle from at least one of the non-blocking position and the blocking position to the other of the non-blocking position and the blocking position. The actuator has an output defining a second axis that is substantially perpendicular to the first axis.

Abstract: The invention relates to a device for actuating a locking member (10) of a functionally essential component (40), particularly a steering column (40) of a motor vehicle, having a gear box (20), being operatively connected to the locking member (10), wherein the locking member (10) can be moved into a locked position (1) and into a released position (2), and vice versa, wherein the locking member (10) engages into the functionally essential component (40) in the locked position (1), the locking member (10) is released from the functionally essential component (40) in the released position (2), an actuation device (30) is provided that can be accessed by a user, said actuation device being signal-connected to the gear box (20) during normal operation, by means of which an electronic actuation of the gear box (20) can be effected via an intentional actuation of the actuation device (30), said gear box moving the locking member (10) into the respective position (1, 2) thereof.

Abstract: A steering lock device includes a lock member that is slidable between a lock position and an unlock position, and a slider that is disposed slidably in a direction perpendicular to a moving direction of the lock member. A sloped portion that is linearly sloped toward the steering shaft along a slide direction of the slider is provided on at least one of the lock member and the slider. The lock member is shifted between the lock position and the unlock position by the sloped portion in response to sliding of the slider. According to the steering lock device, downsizing can be brought due to its short height along a stroke direction of the lock member and cost reduction by commoditization of its main components can be achieved.

Abstract: A steering lock device includes a pin protruded from a side surface of an arm of a slider, a guide groove disposed on a housing to accommodate the slider slidably, and a cover wall the pin when the slider positions at its lock end within the guide groove. According to the steering lock device, it can be made difficult to unlock a steering shaft through an improper act, and thereby superior antitheft performance can be brought.

Abstract: There is provided a key apparatus, including: a key cylinder that is rotatable when a vehicle key is inserted; and an accommodating portion in which an assembling member is assembled in a body member, the body member and the assembling member form an inner surface, and the key cylinder is accommodated in the inner surface.

Abstract: A regulating member, an allowing member and an urging member are easily assembled to a subject to which these members are assembled. When assembling of an interlock unit is carried out, with a fitting convex portion of a link being fitted into a fitting concave portion of a release link, a torsion spring (particularly, a connecting portion) is temporarily elastically deformed, and a pair of spiral portions of the torsion spring are mounted to spring holding shafts of the link and the release link, respectively. As a result, the link, the release link and the torsion spring can be brought into a temporarily assembled state, and can be easily assembled to a unit box.

Abstract: A steering lock device-added structure includes: a steering shaft; a steering column which rotatably houses the steering shaft therein; and a steering lock unit which is disposed on an outside surface of the steering column, and disables rotation of the steering shaft. The steering lock unit is coupled to the steering column while interposing a fracture inducing portion therebetween. The steering lock device-added structure further includes: a steering lock protective member which covers an outside surface of the steering lock unit; and a column protective member which covers a lower surface of the steering column, and is provided adjacent to the steering lock protective member.

Abstract: A driving section and a regulating member are easily mounted to a subject of assembly. In an interlock unit, a solenoid, a shaft, a link, a release link, and a torsion spring are integrated together by means of a unit box. By the interlock unit being mounted to a lock body, the solenoid, the shaft, the link, the release link and the torsion spring can be mounted to the lock body. For this reason, it is not necessary that the solenoid, the shaft, the link, the release link and the torsion spring are separately mounted to the lock body, and the solenoid, the shaft, the link, the release link and the torsion spring can be easily mounted to the lock body.

Abstract: A lock for an augur through which a cable passes has a body having a bore passing therethrough and a lever. The lever has a lever body mounted for rotation in the bore, the lever body having a portion for engaging the cable, and an arm attaching to the lever body for rotating the body and the flat portion into and out of engagement with the cable. The lock also has a contact point disposed in the bore for cooperating with the lever portion to trap the cable therebetween, and a support for guiding the cable therethrough. The support has a portion extending into the bore of the body, the portion having a first slot therein, the lever extending into the slot to contact the cable.

Abstract: A key interlock device includes a body, a camshaft provided in the body so as to be rotated by manipulation of an ignition key, and at least an anti-rotation member provided in the camshaft and being engaged with the body when the camshaft rotates beyond a predetermined speed in one direction to restrict rotation of the camshaft but being disengaged with the body when the camshaft rotates in a reverse direction.

Abstract: A key ring according to embodiments is press-fitted onto a steering shaft (column shaft) at a position that is radially outer side of a fit portion at which multiple shaft members that constitute the steering shaft (column shaft) are fitted to each other, and that is substantially the same as the position of the key ring in the axial direction. When a lock bar is inserted into a lock bar insertion portion formed in an outer periphery of the key ring, the key ring restricts rotation of the steering shaft.

Abstract: An actuation device for a steering lock is operable to selectively lock a rotary steering member against rotation. A lockbolt is movable along a first axis between a steering member-locking position and a steering member-unlocking position. A shuttle is movable between a non-blocking position in which the shuttle does not obstruct movement of the lockbolt from the steering member-locking position to the steering member-unlocking position and a blocking position in which the shuttle obstructs movement of the lockbolt from the steering member-locking position to the steering member-unlocking position. An actuator is coupled to the shuttle and operable to move the shuttle from at least one of the non-blocking position and the blocking position to the other of the non-blocking position and the blocking position. The actuator has an output defining a second axis that is substantially perpendicular to the first axis.

Abstract: A steering column locking device. More specifically, a steering column locking device for golf carts, and the like.

Abstract: A steering lock device includes a lock member that is slidable between a lock position and an unlock position, and a slider that is disposed slidably in a direction perpendicular to a moving direction of the lock member. A sloped portion that is linearly sloped toward the steering shaft along a slide direction of the slider is provided on at least one of the lock member and the slider. The lock member is shifted between the lock position and the unlock position by the sloped portion in response to sliding of the slider. According to the steering lock device, downsizing can be brought due to its short height along a stroke direction of the lock member and cost reduction by commoditization of its main components can be achieved.

Abstract: A steering column assembly for a motor vehicle includes a steering shaft, a support bracket rotatably receiving the steering shaft for rotatably supporting the steering shaft on the motor vehicle, and an anti-rotation device. The anti-rotation device is supported by the support bracket and is moveable between an engaged position and a disengaged position. In the engaged position, the anti-rotation device prevents rotation of the steering shaft relative to the support bracket. The anti-rotation device may be moved from the engaged position to the disengaged position to allow rotation of the steering shaft relative to the support bracket. Prior to assembly of the steering column assembly to the motor vehicle, the anti-rotation device may be moved to the engaged position to lock the steering column in a common rotational position. After assembly, the anti-rotation device may be moved to the disengaged position to allow rotation of the steering shaft.

Abstract: A cylinder lock device includes a rotor case in a cylindrical shape, a rotor arranged to be rotatable inside the rotor case including a key insert hole being formed to extend in an axial direction, a sleeve arranged to be rotatable between the rotor case and the rotor and having an engaging groove, and a plurality of tumblers provided in the rotor to be movable in a radial direction to engage with the engaging groove of the sleeve when biased to an outer radial direction and to release the engagement with the sleeve by disengaging with the engaging groove when a regular key is inserted into the key insert hole.

Abstract: The invention relates to an internal combustion engine (1) comprising a housing (2) having at least one opening (4) into its inside, which is preferably the engine-oil feed inlet, and with a camshaft (5), mounted inside the housing for rotation about its geometric shaft. The camshaft (5) and the housing (2) have means cooperating with each other and with a device for locking a turnable shaft (6) with respect to the housing, insertable through this opening. In a second embodiment of the present invention, the device consists of a rod (6), the cooperating means in the housing consist in a bore (7) for receiving an end of the rod (6), and the cooperating means on the cam shaft consist of a notch (9) made in the surface of the shaft, which cooperates with the rod. In this way, when there is a need to adjust, repair and/or replace engine (1) components, the rod (6) is inserted through the opening (4) and locked in this bore (7) of the housing (2).

Abstract: A cross-key rotational alignment locking device for a VSI-type mineral breaker comprises a generally annular keyway 102 in the top edge portion of the main shaft 12 of the breaker, the annular keyway defining an upwardly extending pilot key 104, a plurality of circumferentially spaced slots 126 in the upper portion of a cylindrical taper lock 108 disposed around the main shaft, the slots in communication with the annular keyway, and a cross-key 130 having a generally annular main body 132 disposed in the annular keyway 102, the pilot key 104 received in a central aperture 136 in the main body 132 of the cross-key 130, and the cross-key having a plurality of radially-extending arms 128 disposed in the plurality of slots 126, such that the taper lock 108 is locked in rotational alignment with the shaft 12. In the preferred embodiment a bronze sleeve 110 having a longitudinally extending split 120 is interposed between the taper lock 108 and the shaft 12.

Abstract: According to some embodiments, an apparatus is provided. The apparatus comprises a steering column, a steering post, and a locking mechanism. The steering post comprises a first opening and a second opening and the first opening parallel to the second opening. The steering post is contained within the steering column. The locking mechanism is coupled to the steering column and comprises a first member including a first diameter; and a second member including a second diameter. The first diameter is larger than the second diameter, and the second member is to telescopically extend from the first member. The second member is to substantially fit inside the first member when the second member is not extended, and the second member is to extend through both the first opening and the second opening.

Abstract: A lock mechanism for a dispenser in combination with an exchangeable roll of material is provided, wherein the roll includes at least one end plug with a bearing pin for mounting the roll to the lock mechanism. The lock mechanism comprises a lock housing with a guide slot for insertion of the bearing pin. The guide slot has a first section with a first width and a second section with a second width which is smaller than the first width. First and second sections are arranged in a direction perpendicular to the longitudinal extension of the guide slot and in a longitudinal direction of the bearing pin. A sliding element is mounted to the lock housing and movable between a first position closing or narrowing the width of the guide slot and a second position opening the guide slot. A lock element is mounted to the sliding element and is rotationally movable about an axis of rotation between a locked position and an unlocked position.

Abstract: A closure assembly for a camshaft phaser. A plug or a cap is provided with either a radially-sealing gasket seal or a face-sealing gasket seal, the seal being formed by insertion of the plug into a bore, or by installation of a cap over a neck formed in a cover plate. The closure is provided with a plurality of spaced-apart locking elements, and the plate is provided with a plurality of spaced-apart, radially extending second locking elements in the form of fingers surrounding a central opening. During assembly, the closure is mated to the plate with the first locking elements interspersed with the second locking elements. The closure is rotated to bring the locking elements into locking engagement with each other, preventing counter-rotation of the closure. No threads or torque specifications are required.

Abstract: When a cam shaft is pivoted by interacted with a key cylinder into an ON or START state, a hooking protrusion and limit cam block maintain a disposition of the plunger. The position is retained even upon an impact or malfunction of a bidirectional solenoid actuator, thereby executing a safe key interlock system.

Abstract: A steering lock apparatus is composed of: a rotational member having an engagement member; an operating portion positioned on a front side of and connected to the rotational member; a holder for holding the rotational member rotatably in forward and backward directions, and for holding the same rotatably in a rear position; an actuator driven by a signal transmitted by a controller upon detection of the rotational member being operated toward a rear side; and a lock member that is operated by the actuator to be engaged with the engagement member of the rotational member in LOCK position for preventing rotation of the rotational member. The rotational member is held rotatably in a rear position and disabled from moving to a front position when the rotational member is operated to a rear position to release engagement between the engagement member of the rotational member and the lock member.

Abstract: An electronic steering wheel lock apparatus having high reliability. The electronic steering wheel lock apparatus (11) includes a lock pin (12) for locking a steering shaft (21). The lock pin (12) is moved by a motor or a plate cam (41). When an engine is activated and the steering shaft is unlocked, a solenoid (31) is engaged with the plate cam (41) to restrict the movement of the plate cam (41).

Abstract: A device for irrotationally locking a motor vehicle's steering shaft (1) using a locking element (2) located within a housing (8) and displaceable to-and-fro between a locking and a release position. The housing (8) is detachably affixed to a tubular casing (5) enclosing the steering shaft (1) and comprising a receptacle (18) that receives the housing (8) being inserted therein. According to the invention and for the sake of easy assembly and disassembly and high security against theft and easy manufacture, the housing (8) is pushed into the receptacle (18) in a direction transverse to the longitudinal axis (10) of the tubular casing (5).

Abstract: The invention provides a motor vehicle antitheft system of the type in which the latch bolt (36, 222) is held radially in the pulled-in retracted position by a member (254) for retaining the latch bolt (36, 222) which is mounted to move between an effaced or retracted position and an active latch bolt retaining position toward which it is elastically urged (262) and in which a retaining finger (252) belonging to the latch bolt retaining member (254) is accommodated in a complementary notch (250) of the latch bolt, wherein the member (254) for retaining the latch bolt (36, 222) is mounted to slide in the housing of the antitheft system (52, 54) parallel to the axis (A) of displacement and of rotation of a manual control member (24, 26, 38), and wherein the finger (252) for retaining the latch bolt (36, 222) is formed at the front free end of the latch bolt retaining member.

Abstract: An arrangement for locking the steering shaft of a motor vehicle, includes a blocking device and a toothed ring which is arranged on the steering shaft and in which a blocking element, which is arranged so that it can be displaced from an unlocked position into a locked position, of the blocking device engages. To allow the blocking device to be attached to the steering device of the vehicle in question and exchanged in a simple manner and to ensure that the blocking device cannot be removed in the locked state of the blocking element, the blocking device, which is provided with a housing, is releasably connected to a flange, which is attached to the steering device, via an adapter part. The flange has a recess which is designed in such a manner that the adapter part, for fitting of the blocking device, can be inserted in a partial area of the recess and can then be displaced along a guide into its limit position.

Abstract: The aim of the invention is to provide a steering column lock with improved break-up safety. To this end, a spring-loaded locking pin (30) is integrated into the peripheral cam (12), said locking pin being co-rotated when a rotor (10) pertaining to the steering column lock is rotated. In the test position (30.1) of the locking pin (30), the pin is aligned with a locking recess (38) in the housing (1) while in a working position of the motor (10) that is obtained by access authorization means, it is not. Normally, the locking pin (30) is inactive since it is maintained in a retracted position by a spring-loaded (47) feeler (40). When the rotor (10) is missing, the feeler (40), due to its spring load (27), releases the locking pin (30). If in this case the rotor (10) is in the rest position, the locking pin (30) engages in the locking recess (38) of the housing (11) and blocks rotation.

Abstract: A steering wheel lock utilizes a motor-driven spindle which drives a locking nut to control a detent disk which has pin-like projections engaged in camming tracks which guide the detent disk linearly and angularly. The detent disk in turn controls a locking pin which can engage the steering wheel shaft.

Abstract: A method of preventing unauthorized driving of vehicle including providing a steering column and a steering wheel; connecting the steering wheel with the steering column for driving; disconnecting the steering wheel from the steering column when a driving is no longer needed and a driver wants to remove the steering wheel so that it can not be used by an unauthorized person; and forming a connecting unit for connecting the steering wheel to the steering column so that the connecting unit is designed individually for each vehicle, and once the steering wheel of a vehicle is removed from the steering column, any different steering wheel can not be connected with the steering column.

Abstract: A aircraft anti-theft device for immobilizing the yoke of an aircraft. The aircraft anti-theft device includes a device for immobilizing the yoke control of an aircraft. The yoke control has a gust lock hole for holding the yoke in a stationary position. The device has a sleeve for wrapping about the yoke control. The sleeve has an interior channel for receiving a portion of the yoke control. The sleeve is divided along its longitudinal axis to form a first and second sections. The first and second sections each have a pair of end edges, a first side edge, and a second side edge. A lock locks the first and second sections in a closed position. A pin for insertion into the gust lock is fixedly coupled to an interior surface of the first section of the sleeve. The pin protrudes from the interior surface of the sleeve. The first and second sections are placed around the yoke control such that the pin enters the gust lock.

Abstract: A steering shaft lock for heavy-duty trucks having a steering shaft and accessible universal joint. The steering shaft lock has an elongated member and a flexible member attached to one end of the elongated member. The elongated member is steel bar-like member and the flexible member is a link-chain type member having one or more apertures or links. The elongated member is adapted to engage a spaced defined in the universal joint and protrude therefrom. The flexible member is adapted to lockingly engage the outer perimeter of the elongated member (at the point of its protrusion) with a locking device, such as a padlock. The steering shaft is locked by moving the flexible member toward the protrusion of the elongated member and placing the shackle of a locking device through one aperture of the flexible member and over the outer perimeter of the elongated member.

Abstract: A locking device is disclosed for locking a steering column of a vehicle against rotation, relative to a fixed structure of the vehicle, the steering column including a steering shaft. The device includes a locking bar attached to the fixed structure of the vehicle, the locking bar being free to reciprocate between locked and unlocked positions adjacent to the steering shaft; and a member projecting transversely from the steering shaft for engaging with the locking bar to limit rotation of the steering shaft when the locking bar is in the locked position.

Abstract: A locking mechanism for securely locking a universal joint of the steering column of a heavy duty motor vehicle, the locking mechanism has a tampered tang or end of which passes through the universal joint. The end of the tang passing through the universal joint has an aperture therethrough for receiving the hasp of a lock container within a locking mechanism body. The locking mechanism body prevents access to the lock hasp to prevent breaking the lock. The tang is tapered to prevent its withdrawal from the lock body by cutting off the outer end of the tang.

Abstract: A cylindrical winch tube cover is placed over the rear end of the hoist shaft for blocking access to the rear end of the hoist shaft. A lock bracket is mounted on the winch tube cover, and a padlock secures the lock bracket to the winch tube cover and prevents removal of the winch tube cover from the hoist shaft. The shackle of the padlock passes through a pair of aligned holes in the lock bracket and a groove in the winch tube cover.

Abstract: A device to discourage theft of stern drives of power boat inboard-outboard propulsion units comprises a locking collar installed about the drive shaft at a location between the engine and the transom of the boat to prevent withdrawal of the drive shaft through the transom passage.

Abstract: The device comprises, mounted on the steering column, a sleeve (2) in the outer surface of which are provided cavities (3) for receiving the bolt (4) of a locking system (5) for preventing rotation of the column. The sleeve is mounted on the column with a tight fit which produces the deformation of at least one of the two parts beyond the elastic limit of the material from which it is made.

Abstract: A steering lock is disclosed for blocking the rotary movement of a motor-vehicle steering shaft, with at least two locking bolts which are movable close to or at a short distance from one another and next to one another in guides and which, in a position blocking the steering shaft, reach into a recess in the steering shaft by means of a front end face and are movable away from the steering shaft into a non-blocking position in their longitudinal extension. The particular guide (17) is so wide that the locking bolt (13, 14) is tiltable in this. A side wall (19) of the locking-bolt guide (17) has a projection (21) or set-off portion, against which the locking bolt (13, 14) rests by means of a projection or an edge (22) in the blocking and tilted position, in order to secure the blocking position.

Abstract: An unlocking prevention device for a steering wheel lock of that type having a driver acting on a detent pin and controlled by a locking cylinder shaft. During the unlawful removal of the locking cylinder, the shaft is shifted in its pull out direction by means of a force and the driver thereby engages into a groove, as a result of which the shaft cannot be removed and, because of the changed form of the shaft, the driver can no longer be actuated.

Abstract: A motor-vehicle steering-column lock has a bush carried on the steering spindle and formed with a plurality of angularly equispaced axial ribs of the same thickness and having sides that define recesses each angularly twice as wide as the rib thickness. At least three elongated locking bolts lying in respective planes and sliding longitudinally independently relative to one another and generally radially with respect to the axis have generally identical and mutually parallel ends of a width substantially equal to the rib thickness. Thus in one locking position the ends of two adjacent bolts are received by one of the recesses while the end of the third of the bolts rests on an adjacent one of the ribs and in another locking position the end of a central one of the bolts rests on one of the ribs while the ends of the other two of the bolts straddle the one rib and are received in respective recesses flanking same.

Abstract: A cylinder lock comprises a cylinder core movable axially by the key and with at least one lock part in particular a lock bolt, which can be actuated by the cylinder core and which is movable via a transmission part by an eccentric member, cam or cam plate actuable by the cylinder core into the non-locking position. The lock part (8, 9) is held in the non-locking position by a tiltable dished plate (20) adapted for movement towards the cylinder core (1) axially against the pressure of spring (22) and disposed coaxially of the cylinder axis, until withdrawal of the key causes the cylinder core (1) to be moved back into the starting position, the plate (20) being withdrawn from the position which locks the transmission part (14). On the side remote from the cylinder core (1), the plate (20) has an inclined face (20b) along which moves a cam follower (18) attached to the transmission part (14), in order to move the plate (20) towards the cylinder core (1) against spring pressure.

Abstract: Control apparatus for a xerographic type copying machine which enables the service technician to give the machine operator or user, as the operator's experience and training progresses, increased control over, and responsibility for, critical machine operating settings. The control apparatus includes a master lock to prevent unauthorized tampering with the machine settings by anyone except the authorized service technician. Individual locks, accessible only to the service technician, are provided for controls which it is expected that the operator or user, with training and experience, can ultimately handle. To nevertheless restrict and control the degree of operator responsibility and involvement in adjusting machine operating settings, means are provided with each control to enable the amount of adjustment that can be made limited.