Abstract: A shift-lock device has a locking member associated with a projection member to engage with the locking member for establishing locking engagement. One of the locking member and the projection member is rigidly connected to a selector of an automatic power transmission and the other is rigidly secured to a stationary member in the vehicular body. The locking member is normally and resiliently biased toward locking direction for establishing locking engagement with the projection member. The locking member is associated with a lock release actuator which is electrically operable and active for a predetermined period only when a predetermined safety condition is established.

Abstract: The present invention is directed to a controller having a power handle to control both the propulsion function and the braking function, and a reverser handle to control the direction in which the locomotive travels. The power handle is operatively connected to a propulsion and brake control device which controls the propulsion and braking functions of the locomotive, while the reverser handle is operatively connected to a reverser control device which controls direction of travel. The propulsion and brake control device preferably includes a propulsion controller to control the propulsion function of the locomotive, a braking controller to control the braking function and an indexing mechanism to independently operate either the propulsion controller or the braking controller.

Abstract: A running control system for a vehicle having a stepless transmission includes a displaceable drive arm connected to the stepless transmission, a control member such as a pedal shiftable within a predetermined range, a transmission mechanism for transmitting a shift of the control member to the drive arm, and a forward-backward selecting lever switchable between a forward mode and a backward mode. The drive arm has a forward range to one side of a neutral position, and a backward range to the other side of the neutral position. When the selecting lever is switched to the forward mode, the drive arm is displaced within the forward range by the shift of the control member within the predetermined range. When the selecting lever is set to the backward mode, the drive arm is displaced within the backward range by the shift of the control member within the predetermined range.

Abstract: A drive range selection employs both a movable shift actuating member that is operatively connected to a customary manual shift valve and a movable park lock actuating member that is operatively connected to a parking lock pawl mechanism. A force transfer device operatively connects the shift actuating member and the park lock actuating member to a selecting lever. Mechanism is provided to disengage the force transfer device from the shift actuating member when the force transfer device is operatively connected to the park actuating member, and to immobilize the shift actuating member in response to activation of the park lock actuating member when the force transfer device is disengaged from the shift actuating member.

Abstract: A lost motion drive assembly has a base mounting upper and lower levers which connect to the louvers of an air plenum, such as in an automobile's ventilation system. A user turns a knob between a plurality of selections, causing a gear-operated actuator to rotate. A clutch mechanism operable between the actuator and levers engages the lower lever to drive it one way in response to rotation of the knob. Upon continued rotation of the knob, a drive lug on the actuator engages the upper lever to drive it the same way while the clutch disengages from the actuator and holds the lower lever fixed. Reverse motion is obtained when the clutch engages the actuator and upper lever, after which it releases the actuator and a second drive lug engages the lower lever to return it to its starting position.

Abstract: A control system for regulating starting and various operations of a walk behind and self-propelled trencher. The control system conditions the trencher for forward, neutral, and reverse operation through use of a single control lever mounted for sliding movement in a common plane extending between a neutral/start position and a drive position and thence in another plane to forward or reverse positions to control the direction of the trencher. When the control lever is in a neutral/start position, a power assembly on the trencher is ineffective to drive wheels used to propel the trencher across a field. When the control lever is shifted to a drive position, a drive path is established between the power assembly and at least one of the wheels on the trencher. The control system is configured to allow the power assembly to be started only when the control lever is in a neutral/start position and prevents starting of the power assembly when the control lever is in other than a neutral/start position.

Abstract: A speed control system for a vehicle having a braking device and a stepless transmission. A change speed member for controlling the stepless transmission is shiftable between a forward drive zone and a backward drive zone across a neutral position. The change speed member is urged to the neutral position, and operatively connected to a change speed pedal and a shift lever. The shift lever is lockable to a selected shift position. Switching may be made between a connection enable state for enabling connection between a first interlocking member connected to the change speed member and a second interlocking member connected to the shift lever, and a connection prohibit state for prohibiting the connection between the first interlocking member and second interlocking member.The connection between the first interlocking member and second interlocking member is canceled with operation of the braking device.

Abstract: A mechanical component attachment safety system is disclosed wherein a position of a blcoking rod is controlled by an over-center lever assembly having a drive lever connected to the blocking rod by a cable actuating system and a link rod. Movement of the drive lever between its over-center positions causes the blocking rod to extend or retract, accordingly. When extended, the blocking rod will prevent closure of a cowl or protective panel and when retracted, will permit closure of the panel or cowl. The drive lever is engaged by a fastener attaching a mechanical component to a frame so as to be retained in a position in which the blocking rod is retracted. If the mechanical component is not properly attached, the fastener will not engage the drive lever, which is biased to its opposite over-center position so as to cause the extension of the blocking rod and prevent closure of the panel or cowl.

Abstract: In a motor vehicle gearbox the selector rods (30-33) carrying the forks which actuate the gear coupling devices are disposed with their axes (30a-33a) at the same distance from the axis (17) of the gearbox shaft with which the coupling devices are associated. When one of the rods is moved away from its neutral position the other rods are locked in the neutral position by locking means (18) including a first series of locking dowels (34) slidable in separate substantially parallel seats (35) formed in the gearbox casing, and cooperating with respective notches (30b-33b) provided on the selector rods. The said seats (35) open into a common cylindrical cavity (36), extending transversely thereto, in which there is provided a train of locking pins (37) resiliently thrust against one another.

Abstract: A park lock releasing mechanism for a transmission shift control device, includes a release button installed on a gear position indicator and top panel assembly, and a release lever installed on a selector lever and operatively connected through an intermediate member to the release button for driving a bushing of a park lock mechanism when the release button is pushed downward. The intermediate member is so shaped as to enable release button to be offset from the release lever in a vehicle width direction.

Abstract: The shift lever interlock system combines a shift lever position signal, interlock actuator extend and retract signals and vehicle system input signals (e.g., representing the service brake, ignition key-in, ignition circuit and vehicle battery voltage level) in a logic control circuit to lock the shift lever in the "Park" position, except if the ignition key is not in the "Lock" position and the service brake is depressed (applied) or the voltage of the battery is too low. The interlock system is not actuated to lock the shift lever in position when the shift lever is in positions other than as retained in the "Park" position by the detent mechanism.

Abstract: A mechanism connecting a rate control with a brake control for preventing the rate control from being shifted from a non-driving mode to a driving mode when the brake control means is in its parked mode, including a rod-like member having an offset portion biased to block an accelerator arm of the rate control, and a cam member in contact with the offset portion for allowing the offset portion to shift to its blocking position when the brake control is shifted to the parked mode, and for shifting the offset portion to a position whereat the accelerator arm is free to shift between the driving and non-driving modes when the brake control is in the unbraked mode.

Abstract: A roller linkage assembly (10) of the type for positively locking a traveling rail member (18). The assembly (10) includes a housing (22). The housing has a passageway (24, 26, 28) therethrough. A plurality of rollers (30, 32, 34) are moveably disposed in the passageway (24, 26, 28). An actuation cylinder (14) has a piston (16) extending outwardly therefrom for movement in the passageway (24). The piston (16) surrounds a first roller (30) for positively moving the same in response to a force applied by the actuation cylinder (14). When the cylinder (14) is energized, the first roller (30) is moved to a locked condition. This forces a second roller (32) to its locked condition. Finally, the force is transmitted to a third roller (34) and the third roller (34) engages a notch (36) in the traveling rail member (18) to prevent movement of the same. When the assembly (10) is in the locked condition, no forces are transmitted from the rail (18) to the piston (16).

Abstract: A controller for a railway locomotive is provided having a first control handle which controls propulsion power and braking power, and a second control handle which controls the direction of movement of the locomotive. The controller includes first and second shafts having a plurality of cams fixed thereto for actuating propulsion and braking power control contacts. Additional cams are rotatably mounted on the second shaft for actuating contacts which control the direction in which the locomotive travels. The first control handle is connected to a drive gear which is operatively connected by two lost motion mechanisms to the first and second control shafts. By manually operating the first control handle, the drive gear and two lost motion mechanisms selectively and alternatively rotate the first and second shafts so as to control propulsion power and braking power for the locomotive.

Abstract: A steering column shift mechanism having a wheel brake interlock includes a gear selector shaft moved by a gear selector action initiated by the vehicle operator manually by manipulating a gear selector lever between a park position and at least one drive position. A brake pedal actuates a switch within an electrical circuit containing an electrical solenoid and a power supply to actuate a locking bolt that blocks movement of the selector shaft unless the brake pedal is depressed. The selector lever includes an arm extending into a shift gate containing a system of interconnected recesses corresponding to selected drive positions among which the selector lever 15 moved. A locking bolt, actuated by an electrical solenoid for movement parallel to the axis of the selector shaft, includes a ramp contacted by a spring-loaded bolt mounted for movement laterally with respect to a second bolt, held by a compression spring in contact with the selector lever.

Abstract: A service brake and shift lever interlock system for a vehicle is operably controlled by a logic control circuit to prevent movement of the shift lever from the "Park" position when the ignition switch is in the "Start" or "Run" position and the service brake pedal is in a brake release position (i.e., the vehicle brakes are not applied). The interlock system does not prevent movement of the shift lever from the "Park" position under other conditions when the ignition switch is in the "Start" or "Run" position. An ignition interlock system prevents movement of the shift lever from the "Park" position when the ignition switch is in the "Lock" position.

Abstract: An equipment mounting system includes a fixed leg and a second leg pivotable thereon. Equipment mounted at the free end of the second leg is pivotable to a position which is clear of a motor vehicle access location. When the mounting system is locked in a closed position, the equipment is operable. Further, whenever the mounting system is not locked in a closed position, one or more disabling devices prohibit operation of the equipment.

Abstract: A mechanism for use with a vehicle having a power source and a transmission coupled with the power source. A shift lever coupled with the transmission is shiftable in a first direction within a first slot for selectively shifting the transmission between a neutral mode and driving modes. The shift lever is shiftable in a second direction within a second slot for blocking a brake mechanism in an engaged mode. An abutment mechanism is formed in a brake linkage and is abuttable with a portion of the shift lever when the shift lever has shifted into the second slot for blocking the brake linkage and brake mechanism from shifting into the disengaged mode.

Abstract: A shift lever apparatus for an automatic transmission of a vehicle includes shift positions of which are arranged in the order of a parking range, a reverse range, a neutral range, and a drive range and are selectable in a single shift range by a swinging operation of the shift lever. The apparatus is provided with a control member which is adapted to control the movement of a moving plate caused by the pressing of a detent pin. Control is effected such that even if a pushbutton is pressed, a shifting operation from the parking range to another range is prohibited when the parking range is selected as the shift position and a foot brake of the vehicle is not pressed with the foot. Furthermore, even if the pushbutton is pressed, a shifting operation from the neutral range toward the reverse range is prohibited when a speed of the vehicle is above a predetermined value and a shifting operation is effected to the neutral range.

Abstract: A shifter for an automatic transmission is prevented from shifting out of park position when the ignition switch is on unless the service brake is applied. A solenoid-operated blocking member is positioned to selectively block movement of a detent pin to prevent the shift lever from leaving the park position of the shift gate. A circuit including switches responsive to ignition, service brake application and shift lever position controls solenoid activation. A cam responsive to the shift lever release button and to the lever position controls the shift lever position switch.

Abstract: Auxiliary power actuated clutch and gear shifting device for a motor vehicle transmission with function selector and a gear change mechanism controlled by the driver through a clutch actuating mechanism at the clutch pedal wherein a response signal to the driver is received when a gear is engaged in the transmission or the transmission is in neutral. Located at the clutch pedal and connected with it mechanically is a safety device that holds the actuated clutch pedal against movement when a gear is disengaged in the transmission during the shifting of gears. The safety device holds the clutch pedal clamped in actuated position until a gear is engaged in the transmission whence the driver can carry out the procedure of engaging the clutch again in known fashion. The safety device consists of a clamping mechanism that grips a piston rod connecting to the clutch pedal to prevent further operation until the clutch pedal is released.

Abstract: The operation device of a transmission in accordance with the present invention has a lock mechanism which can lock a shift rod in either a high speed range or a low speed range in a transfer in response to a detection signal when a control lever is positioned at a parking range, and has also alarm means for raising an alarm in response to a detection signal when the transfer is at a neutral position. When a vehicle is parked with the control lever being in the parking range, a driver can recognize the state of the transfer by the alarm if the transfer is at the neutral position, and shifts the shift rod to the high or low speed range by operating the transfer lever. The lock mechanism operates in the high or low speed range and a full driving system is connected so that the vehicle can be kept stopped and self-run of the vehicle on a slope or the like can be prevented.

Abstract: An HST type axle driving apparatus for driving axles, wherein, when a braking device provided in the apparatus is operated for braking in the state of forwardly or backwardly speed changing, a hydraulic pump or a hydraulic motor at the HST speed change apparatus is subjected to an over-load, so that in order to eliminate the overload, an association mechanism is so constructed that the HST type speed change apparatus changed of the speed forwardly or backwardly is forcibly and reliable kept in the neutral when the braking device is operated. Also, the association mechanism is disposed within a transmission case so as to make the HST type axle driving apparatus compact.

Abstract: A shift lever is provided for selecting operating ranges of an automatic transmission of a motor vehicle. A lock lever is provided for locking the shift lever at a parking range position of the transmission. The lock lever is urged by a spring to the parking range position. The lock lever is arranged to be moved to a release position when a brake pedal of the vehicle is depressed.

Abstract: A change-speed construction for a propelling system of a work vehicle. The construction has a neutral return mechanism for causing a stepless transmission to return to the neutral in response to disengagement of a main propelling transmission clutch. Then, when the clutch is engaged again to resume vehicle run after a temporary stop for e.g. replenishment of materials to be worked, the vehicle does not make a sudden start.

Abstract: A power mechanism used in a tape recorder for mode changes, etc. does not use a solenoid plunger, but uses a simple arrangement which includes a select plate having a swing portion which swings between a shift position for shifting an operated member and a release position for releasing the operated member when the select plate advances with a rotating force of a power cam and includes a guide mechanism for guiding the swing portion toward the shift and release positions.

Abstract: A column-mounted gear selector mechanism for an automatic transmission includes a locking lug installed on a control rod and is engageable with a catch lever so as to lockingly hold the control rod when the control rod is in a "parking" position, i.e., when a parking switch is turned on and either of an ignition switch and a brake switch is turned off. The locking lug has side surfaces opposed in a longitudinal direction of a vehicle body. A switch actuator is provided which has a first arm placed on one of the side surfaces of the locking lug to be secured to same and a second arm extending in a longitudinal direction of the vehicle body. The parking switch has a movable contact which is elongated in a lateral direction of the vehicle body so as to be engageable with the second arm of the switch actuator.

Abstract: A motor vehicle interlock device (10) has an actuating assembly (11) connected by a push-pull control cable (13) to a dead bolt throw assembly (12). The dead bolt throw assembly (13) has a dead bolt (60) which is engageable with a lock engaging lug (20) of a transmission, operating range, drive selector. A plunger (30) is biased by a first compression spring (39) into abutting engagement with the lever arm (15) of a foot-operated brake such that when the foot-operated brake pedal is applied, the plunger (30) is urged toward the lever arm (15) The first end (46) of the core (48) in a push-pull control cable (13) is attached to the plunger (30), and the second end (73) of the core (48) is attached, by a lost motion connector (75), to a dead bolt (60). As such, when the plunger (30) follows the lever arm (15) the push-pull control cable (13) translates the dead bolt (60) out of engagement with the lock engaging lug (20), thereby freeing the transmission, operating range, drive selector.

Abstract: A brake/shift interlock assembly is mounted on the steering column in operational cooperation with a column mounted shift control mechanism for an automatic transmission. The brake/shift interlock assembly includes a pivotal latch for selectively locking the detent bar of the shift control mechanism in the park position, a solenoid assembly with an actuator rod for magnetically holding the latch in the locking position, a return spring for normally biasing the actuator rod and latch in the locking position, a spring lever for selectively moving the latch to an unlock position and an electrical control circuit for energizing the solenoid when the ignition system is on and the foot brake switch is open.

Abstract: A shift lever for shifting an automatic transmission is axially supported by a base plate which is provided with a locking device to enable shift operation of the shift lever when the driver depresses the brake pedal. A cover is mounted to the base plate and is provided with a lock cancellation push button to forcedly cancel the locking apparatus at times when the vehicle is being repaired or the like. The button on the cover and the locking device are connected by a flexible wire and so operative force of the pushbutton can be definitely transmitted to the locking device to cancel the lock even if the positions for assembling the cover to the base plate are not always the same.

Abstract: In order to assure the safety of starting of an automatic transmission type motor vehicle, a safety device is equipped to a column shift. Due to locking function provided by the safety device, the shifting movement of a shift lever from Parking-position to the other positions is permitted only when the foot brake is kept depressed.

Abstract: A service brake and shift lever interlock system for a vehicle is operably controlled by a logic control circuit to prevent movement of the shift lever from the "Park" position when the ignition switch is in the "Start" or "Run" position and the service brake pedal is in a brake release position (i.e., the vehicle brakes are not applied). The interlock system does not prevent movement of the shift lever from the "Park" position under other conditions when the ignition switch is in the "Start" or "Run" position. An ignition interlock system prevents movement of the shift lever from the "Park" position when the ignition switch is in the "Lock" position.

Abstract: In an automatic transmission shift control device, a rocking lever and a second biasing unit are provided for holding a selector lever in a shiftable condition when the selector lever is in one of the gear positions other than a parking position. A first biasing unit is provided for holding the selector lever in a locked condition when the selector lever is in the parking position. A solenoid is provided for releasing the selector lever from a locked condition when energized. The solenoid is energized only when a brake pedal is fully depressed under a condition where an ignition key is in an "ON" position and the selector lever is in the park position.

Abstract: A selector lever apparatus includes a selector lever shiftable to a plurality of mode setting positions including a parking position. When the selector lever is located at the parking position while a brake pedal is not depressed, the lever is locked in the parking position by a lock mechanism. The lock mechanism includes a lock pin movable between a lock position for locking the selector lever and a lock release position for allowing shifting of the lever. The lock pin is urged to the lock position by a spring. The lock pin is coupled to the brake pedal through a cable member so that the lock pin is moved to the release position upon the depression of the brake pedal.

Abstract: The pivot axis of a locking lever is used as the main gage or reference point relative to which the dimensions of components of the shift control mechanism are taken and, together with the geometry of the bellcrank, provide a transmission shift control mechanism that has no need for adjustment of the components involved upon assembly of the shift control mechanism with the ignition lock mechanism in the vehicle.

Abstract: A control lever of a column-mounted control device for an automatic transmission is installed on a steering column in such a way as to be rotatable in the circumferential direction of the steering column for selection of gears. A location mechanism is operative to releasably limit rotation of the control lever in the circumferential direction of the steering column and locates the control lever in one of gear positions including a stoppage gear. The control lever is released from the above described limitation in rotation in the circumferential direction of the steering column when pulled toward a driver's seat. A location sensor is operative to detect that the above described limitation in rotation of the control lever is performed in the stoppage gear by the location mechanism and produce a stoppage signal representative thereof. A brake sensor is operative to detect a braking operation and produce a braking signal representative thereof.

Abstract: A shift lever device is used when an assembly of a vehicle is performed while the vehicle is being moved in a state where a shift lever of an automatic transmission gear is in a neutral state, i.e., in a state where wheels can be freely turned. A movable body is driven by a detent pin moved in the acial direction of the shift lever in a state where the shift lever is at a park position. The movable body is coupled to a steering locking device. An operator moves the movable body to a position at which it can be driven by the detent pin of the shift lever in spite of the fact that the shift lever is not at the parking position, so as to enable an igition key to be removed from the steering locking device.

Abstract: A locking apparatus for a shift lever in an automatic transmission of a vehicle which permits the shift lever to move from a vehicle non-driving position to a vehicle driving position by means of an electrically operated member, such as a solenoid, in the presence of a predetermined condition such as that of applying a brake pedal. When the shift lever is located in the non-driving position, a detent pin for inhibiting the shift lever from shifting is engaged with a lock recess formed in a lock member and the lock member is held in a lock position by means for the electrically operated member. Even though the electrically operated member fails to function due to a malfunction or the like, an occupant can manually shift the shift lever from the non-driving position to the driving position in order to move the vehicle.

Abstract: An electrically controlled transmission shift interlock device. The device provides interlock capability by locking the pivotable shift actuating lever which is operatively associated with the transmission. A transmission mounted solenoid is provided having a moving armature coupled to a locking member which, when energized, positions the locking member into interlocking engagement within an engaging notch provided in the shift actuating lever. The device includes means for proper alignment of the interlocking components during installation of the interlock device onto the transmission. One alternate embodiment further provides means for having interlocking capabilities at more than one gear shift lever position. Another embodiment causes the transmission actuating lever to lock when the solenoid is de-energized and is movable upon energization.

Abstract: The disclosure relates to a control mechanism for automatic transmission in a motor vehicle to prevent operation of a selector lever under certain conditions. For example, the selector lever can be locked into the park position and shifted out of this position only after the brake pedal has been operated. The locking mechanism includes a manually controllable catch mechanism which cooperates with an electro-magnetically operated mechanism to achieve the desired selector lever control.

Abstract: An anaesthetic apparatus having a plurality of vaporizers is provided which utilizes an interlocking device which prevents more than one vaporizer from being activated at one time. The interlock device can be used with any number of vaporizers mounted side-by-side. The interlock device comprises a cam follower which is adapted to be received in a rotating cam which is used to activate the vaporizer. The cam follower is connected to a pair of cranks which activate bars which interact with bars on adjacent interlocking devices, when one of the interlocking devices is activated, thereby locking all the other vaporizers in a inoperative position. Also provided is a safety lock connector which is used for connecting hose to an anaesthesia apparatus.

Abstract: A gearshift lever interlock is provided that allows movement of the gearshift lever of an automatic transmission from the neutral or park positions only if the brake pedal is actuated. The improved locking device locks the gearshift lever in the park position in the event of a malfunctioning electrical locking system but will not lock the gearshift lever in the neutral position. A mechanical release is provided to override the electrical gearshift lever interlock sytem.

Abstract: A body has a guide members extending along the axis of the body. A pair of racks held by the body are movable along the guide members. The first rack is connected to a first remote control unit through a first cable. The second rack is connected to a second remote control unit through a second cable. When one of the first and second racks is moved from a reference position, the lock members locks the movement of the other rack. An intermediate gear is arranged between the first and second racks. An interlocking member is connected to the intermediate gear. When one rack is moved, the intermediate gear is moved in the same direction as the moved rack. The movement of the intermediate gear is transmitted to equipment to be controlled through the interlocking member.

Abstract: The invention is a system to override electric control units which normally overns the transmission and fuel regulating valve of an automotive vehicle. The system includes a first linkage to mechanically operate the automatic transmission, a bypass valve hydraulically in parallel with the fuel regulating valve, and a second linkage to mechanically operate the bypass valve. The linkages are connected to a control assembly in the driver's compartment of the vehicle, the assembly having two moveable members for manually actuating the linkages. The control assembly has a mechanism for keeping the bypass valve closed during selected gears or modes of the transmission. This mechanism also prevents the the transmission from shifting gears when the bypass valve is open.

Abstract: A selector lever apparatus for a vehicle having an automatic transmission includes a selector lever shiftable to a plurality of mode setting positions including a parking position, and a selector lever lock mechanism. The lock mechanism locks the selector lever to prevent shifting of the lever when the lever is set at the parking position and a brake pedal is not depressed. When the brake pedal is depressed, the lock mechanism releases the locked state of the selector lever.

Abstract: A dead-man lever control system for apparatus such as a snow blower or lawnmower includes a latch and key arrangement connected to the levers which permits the levers to be operated independently or conjointly, and which also permits one lever to be locked out by the other. Provision may be made for the locked-out lever to over-ride the lock-out by applying a greater than normal force to the lever.

Abstract: A shift rail interlock mechanism (18) for a transmission having a plurality of parallel shift rails (16a,16b,16c) is operative to inhibit movement more than one shift rail from its neutral position at a given time. The interlock mechanism includes a support member (20) which supports the rear ends of the shift rails for axially shiftable movement along their respective axes. The support member (20) has an aperture (30) formed therein which extends transversely to and intersects the shift rails. A separate interlock pin (31,32) is slideably mounted within the aperture between each pair of shift rails. Each of the interlock pins is provided with tapered end portions (31b,31c) defining end surfaces (31d,31e) engageable with end surfaces of adjacent pins.

Abstract: The release mechanism of an electronic timelock employs two bistable electromagnetic actuators to control the "on-guard" and "off-guard" conditions of the lock, each actuator comprising an element of ferro-magnetic material whose magnetic polarity serves as the "memory" of whether the lock is in an on- or off-guard period and which polarity is reversed by single magnetizing pulses through associated coils when each successive on- and off-guard period is programmed to commence.More particularly, when on-guard the coils are pulsed in one direction to magnetize the actuating elements so that they are attracted by specified poles of associated field magnets. In this condition the actuating elements block a beam which is pivotted centrally to a bolt which in turn blocks a bar which is attached to the door's boltwork. When off-guard the coils are pulsed in the opposite direction to reverse the magnetization of the actuating elements so that they are attracted by the other poles of the associated magnets.

Abstract: The present invention relates to an improved electric start lawn mower control. The improved control includes a housing having a bail disc and a cable disc pivotally mounted therein, an electric switch secured within the housing and a starter button accessible on the exterior of the housing for actuation by the operator and having an arm which pivots to actuate the switch when the starter button is depressed. The bail disc includes a stop shoulder to mechanically prevent operation of the starter button until the bail disc is moved to its bail down position and the cable disc is moved to the "on" position. The bail disc is interconnected with the cable disc so that movement of the bail disc moves the cable disc to move the cable from its "off" position to its "on" position and release of said bail disc allows said cable disc and its cable to return to its "off" position. Additionally the housing includes the cable and wiring exiting through the same opening.

Abstract: A valve control mechanism for a paint spraying system provides for pressure relief prior to turn-off of the compressor. A pair of interlocking knobs, a pressure control knob and an off-prime-spray knob, are mechanically interlocked so that the compressor can only be turned on and off in a low pressure condition. When spraying has been completed, it is necessary to first operate the off-prime-spray knob to the prime position at which a cam structure opens the off-prime-spray valve for an immediate pressure relief prior to turn off of the pump.