Abstract: A work-machine splash guard for enclosing a space for machining a workpiece, and preventing the spraying of chips and machining fluid, is equipped with: a front-surface door for opening and closing in the horizontal direction via an arc-shaped movement, and positioned on the front-surface side of the work machine; a side-surface door for opening and closing by performing an arc-shaped movement that is concentric with the front-surface door, and overlapping with the front-surface door; and door-locking switches for selectively allowing the opening/closing of the front-surface door and the side-surface door according to an opening/closing pattern.

Abstract: A dunnage discharge chute includes features designed to prevent injury to an operator of a dunnage producing machine. The dunnage discharge chute includes at least one door with sensors that monitor the position of the door and output position signals. The position signals are received by a controller which outputs a control signal that disables operation of the dunnage producing machine based at least in part on a change in the position signals over a predetermined period of time. Additional sensors may detect whether the door is open beyond an upper open position, and a relay may disable operation of the dunnage producing machine immediately if the door is opened beyond the upper open position. Thus, if the operator reaches in through the door, the dunnage discharge chute will disable operation of the dunnage producing machine.

Abstract: A dunnage discharge chute includes features designed to prevent injury to an operator of a dunnage producing machine. The dunnage discharge chute includes at least one door with sensors that monitor the position of the door and output position signals. The position signals are received by a controller which outputs a control signal that disables operation of the dunnage producing machine based at least in part on a change in the position signals over a predetermined period of time. Additional sensors may detect whether the door is open beyond an upper open position, and a relay may disable operation of the dunnage producing machine immediately if the door is opened beyond the upper open position. Thus, if the operator reaches in through the door, the dunnage discharge chute will disable operation of the dunnage producing machine.

Abstract: A safety shut off mechanism for a sealing machine includes a housing having a front board, and a door panel rotatably secured to the front board and rotatable between an outward position, an inner position, and an intermediate position. A switch member may be attached to either the board or the door panel and may be actuated when the door panel is disengaged from the intermediate position or moved inward or outward toward the outward position or the inner position, so as to shut off the sealing machine when the door panel is not in the intermediate position.

Abstract: A machine safety guard unit system having a flexible panel moved upwards and downwards between track members with the system positioned between the operative parts of a machine and a machine operator, such panel when closed protecting the machine operator and when moved upwards into its open mode, allowing access to the machine and preventing the machine from operating. In some embodiments more than one of such units can be disposed around a machine with alarm means; and in yet other embodiments, with interengagement means connecting such units.

Abstract: A safety device for a workshop machine contains a safety screen which is equipped with a powering device in order to lower the screen before the machine starts to operate. The powering device contains friction rolls on opposite sides of the screen and are coupled to a drive motor. The screen is equipped on both its top side and its bottom side with approach switching apparatus which, when moved, gives off an electric signal to a central processing unit. The central processing unit is capable of controlling the drive motor in accordance with the signals given off by the approach switching apparatus.

Abstract: The invention concerns a safety device on metal-forming machine tools, in particular on pneumatic pressing machines, used in the execution of short-stroke pressing processes, for preventing intervention in the danger zone during the tool working movement and unintentional closure movements. The machine essentially comprises a machine housing, a power-generating system, a control system and a tool arrangement with a fixed part and a movable part, and the actual metal-forming tool connected thereto. The object of the invention is the highly reliable prevention of injuries owing to inattentiveness in spite of hands' being left in the immediate danger zone.

Abstract: Safety device for an infeed site of a web of material into a roller nip in a processing device on a printing press includes cover elements movably mounted on the processing device for nearly completely covering the infeed rollers in operating positions of the processing device.

Abstract: A safety apparatus for use with a fiber processing unit having a plurality of rotating godet rollers. The apparatus includes a safety gate, positioned between an operator and the godet rollers, having a plurality of apertures through which a long-handled cutting tool may be extended. A plurality of guides mounted to the frame of the godet unit, each extending adjacent and substantially parallel to one of the godet rollers, limit the range of movement of the cutting tool to the proper position for cutting wrap from the godet rollers.

Abstract: A safety bar mechanism and sheet processing device having a safety bar mechanism, with which such an accident that the operator's hand is pinched between a table and peripheral devices etc. can be positively avoided whatever direction an external force exerts. The safety bar mechanism is disposed, for example, above the table on which a sheet is stacked, and comprises detector means the upper end of which is supported on a fixed part such that the detector means pivots freely in forward/backward directions and has play in upward/downward directions. When an external force works on the detector means, thereby moving the detector means upwards, forwards or backwards, a switching means is so operated as to at least stop the upward movement of the table.

Abstract: A brake holding system for a vehicle, comprising a vacuum magnetic member, a brake pedal extension arm which is attached to a push rod which, in turn, is connected to the master cylinder. The brake holding system can be actuated by a vacuum magnetic member when the speed of the vehicle is reduced to 0 mph under activation of a plurality of sensors while the vehicle is completely stopped.

Abstract: Provided is a hill holder system operative to prevent a vehicle such as a truck having a fluid operated brake system from rolling backward down an incline or to assist an operator in braking when descending an incline. The system utilizes a control signal (C) provided by a central processing unit (10) operative to instruct a brake control valve (22) to close the brake balve exhaust port(s) (27) to maintain the brakes in an engaged condition whenever a selected speed condition such as vehicle ground speed is below a predetermined value. In other embodiments, selected vehicle drive train conditions such as either or both throttle and clutch position are processed in combination with the selected speed signal to effect braking in the manner desired.

Abstract: Brake pressure is increased when the brake pedal is operated and the vehicle falls short of a very slow reference speed v.sub.x, which value is variable and increases as the vehicle deceleration increases. The pressure is maintained until the throttle is applied.

Abstract: A fluid pressure braking system for a vehicle having service brakes and spring activated parking brakes includes electropneumatic activators for effecting and holding a limited service brake application while the driver leaves the vehicle to make a route pick-up. Accordingly, the spring brakes are not used during route pick-ups, thereby increasing the life of the spring actuator since it is not repeatedly cycled. An electropneumatic interlock automatically effects a parking brake application if the vehicle ignition is switched off while an electropneumatic service actuation is effected.

Abstract: A safety interlock/latch assembly for use on a printing press having at least one safety latch (100) and one guard element (102). At least one lockable pivot device (106, 116) for allowing rotation of the guard element (102) is attached to a first end (104) of the guard element (102). A roller (112) for engaging the lockable pivot device (106, 116) is provided and has a cam (146) for switch actuation. A support device (132) for rotatably holding the roller (112) is provided and has an aperture (142) with a predetermined configuration for receiving the lockable pivot device (106, 116). The support device (132) is located at least between the lockable pivot device (106, 116) and the roller (112) and is attached to the printing press. A release latch (160) on the support device (132) holds the guard element (102) open and a spring latch (158) on the support device (132) holds the guard element (102 ) closed.

Abstract: A brake booster for holding the braking action even if the brake pedal is released. The booster has a low pressure chamber and a variable pressure chamber with a diaphragm therebetween for moving the output shaft to the brake cylinder. A valve mechanism mechanically controlled by the brake pedal switches a communication passage between the low and variable pressure chambers and an atmospheric pressure passage from the variable pressure chamber to the exterior. A first solenoid valve can close the communication passage between the low and variable pressure chambers irrespective of the brake pedal position so as to hold the braking. A second solenoid valve can control a passage between the variable pressure chamber and the low pressure source so that the braking release can be gently effected.

Abstract: This invention relates to a hill-holder which prevents backward rolling of a vehicle when starting the vehicle on a hill facing upwardly. The hill-holder comprises a solenoid valve assembly having a cylindrical core, in its central portion and a bobbin surrounding the cylindrical core. The cylindrical core has two opposite grooves for communication on its outer surface and comprises a rod having a conical-shaped head. Even when the solenoid valve assembly is energized, it is possible for the fluid pressure to flow from the master cylinder assembly to the wheel cylinder assembly. However, the fluid having passed will not be returned unless the switch for a side brake is off or the clutch pedal is depressed.

Abstract: A device for holding the braking force of a motor vehicle has a braking force holding valve in a brake operating fluid circuit. The device ascertains whether a load is imposed on an engine of the motor vehicle based on detected signals indicating the amount of depression of an accelerator pedal and the rotational speed of the engine. When there is a load acting on the engine, the braking force holding device is opened to release a braking force.

Abstract: A conveyor is shown having an endless material transporting member running between an idler sprocket at one end and a drive sprocket at the other, both supported in a frame of the conveyor. A drive motor is used to drive the drive sprocket, and hence the conveyor. A controlling device for the motor is provided having a pivotally mounted slack sensing lever having a first rest position spaced apart beneath an upper flight of the endless material transporting member. A counterweight, resting on a stop urges the lever in position. The lever is fixed to a pivot pin, which has a trip lever attached. Upon slack in the chain deflecting the slack sensing lever, the pivot pin rotates moving the trip lever which in turn activates a microswitch controlling the motor. Upon sufficient deflection, the motor will be de-activated.

Abstract: The braking system comprising an input mechanism, such as a brake pedal or a brake lever, actuated by a vehicle operator during brake application. A sensor senses the pressure exerted on the brake pedal and delivers a first electrical signal in accordance with that pressure. The system also includes a source of brake fluid under a constant fluid pressure and pressure modulators in fluid communication with the source and the wheel cylinders. An electronic control unit responds to the first signal and delivers to the pressure modulators a second electrical signal proportional to the first signal to cause the pressure modulators to communicate to the wheel cylinders a fluid pressure proportional to the second signal to apply the brake with a braking force proportional to the applied pressure. The braking system also provides an anti-skid function, traction control function, and braking force proportioning function.

Abstract: A box designed for holding safety apparatus, such as face and eye protecting shields used in conjunction with grinders and the like, is electrically wired to such grinder or similar shop equipment. When the face and eye protector is stored within the box, the electrical circuit to the grinder remains open so that it cannot be used. A user of the grinder must first remove the face and eye protector from the box, presumably to use the protector in the prescribed manner, and a spring actuated switch then closes the electrical circuit so that the grinder may be operated.

Abstract: In a hydraulic brake system for a vehicle of the kind comprising a fluid pressure source having a reservoir and a hydraulic booster having a power piston arranged to receive the pressure fluid of a control fluid chamber which is proportional to a stepping down force on a brake pedal, a normally open type valve is disposed in a fluid passage provided for returning the pressure fluid of the control fluid chamber to the reservoir and is arranged to close in response to a braking pressure retaining signal produced when the vehicle is stopped by brake application.

Abstract: The object of the invention is a cubicle for machining centers, consisting of a front one or multipart face wall and stationary or multipart side walls (11, 12), which can be designed to be like sliding doors. In order to prevent damage to the side walls or the windows therein through a collision with a workpiece projecting sideways during the machining cycle or during set up, a part of the side walls (11, 12), according to the invention, is designed to swing sideways, so that it can yield way by a pre-determined distance upon impact by a workpiece. At least one emergency switch is installed in the movement range of these side wall parts, which switches off the forward drive of the workpiece table(s) (4) when it is activated.

Abstract: An apparatus for preventing the opening for one or more access doors to rotating machinery which is confined in some form of enclosure. A shaft from the machinery extends through the enclosure and has a disc attached to it. The disc has one or more radial holes drilled in the periphery to permit the entry of a release rod, but only when the machinery is stopped. The release rod is attached to a pivoted rod which is moved into and out of locking engagement with the doors when the release rod can enter the periphery hole. The pivotal rod contains two locks each for one or more doors. One lock prevents the door from being rotated toward the rod and the second lock prevents the door from being rotated away from the rod unless the pivotal rod is pivoted to release the locks.

Abstract: A perimeter guard for a machine wherein a plurality of vertical posts are spaced about a machine. Each post is H-shaped and has lateral flanges projecting from it to create vertical channels on each side of the post. A transparent window is slidably mounted in one set of perimeter channels to form an upper guard and a lower pannel is slidably mounted in the other set of opposed channels.A counterbalance is provided for the windows and a detent is provided for locking the lower panels in their lowermost position or in a raised position.

Abstract: An improved safety device or guard for use upon a press or other machine, which has a work zone for receiving a work piece, is provided to protect the operator. The guard has a base with sloped surfaces leading to the work area and slidable gates positioned adjacent said base. The operator inserts the work piece by moving it along the sloped surfaces of the base until it contacts the gates and forces the gates upward. The gates are raised only by an amount which is sufficient to allow the work piece to move into the work zone. The gates ride upon the top of the work piece and automatically adjust for various thicknesses of the work piece during the operation of the machine. The guard has flange members which are attached to the base for slidably mounting the guard to a machine and has a barrier mounted upon the base which is angled inwardly toward the work zone for permitting the use of work pieces which are shorter than the overall width of the barrier.

Abstract: An electrically controlled hydraulic lift, such as wheelchair lifts for vehicles, wherein the hydraulic reciprocating motor for operating the platform of the lift is mounted in a vertical slot so that any obstruction in the downward movement of the platform of the lift will cause the reciprocating motor to rise in the slot and operate a microswitch to automatically shut off the continued supply of fluid to the reciprocating motor. This arrangement not only prevents the crushing of obstacles that get in the downward path of the platform, but also limits the downward movement of the platform when it contacts the solid ground or floor level from which an object is to be lifted, such as an invalid in a wheelchair. If desired, the upward movement of the reciprocating hydraulic motor may be restricted by resilient means for maintaining it in the lower part of its mounting slot.

Abstract: A safety interlock between a machine guard and a machine actuator, comprising locking means for the guard and locking means for the actuator, the guard locking means being arranged, upon closing of the guard, to engage and thereby release the actuator locking means and to be held in a guard locking condition by such engagement while the machine is actuated.

Abstract: A table for supporting an electric power tool is provided with a safety shut-off device. A bar is pivotably mounted on the side of the table and a shut-off switch is mounted to the table behind the bar. The bar is biased away from the shut-off switch by a spring. If an operator falls or leans against the bar, the switch is actuated to shut off the power to the tool.

Abstract: The invention is related to a safety device for a press machine or the like. The safety device includes a first guard plate which slidably extends over the machine access area and is powered by an air cylinder having a movable rod connected to a movable arm of the first guard plate. The device also has a second guard plate slidably attached to the first guard plate which has a switch means for deactivating the air cylinder and therefore stopping the forward motion of the first guard plate whenever the second guard plate exhibits movement toward said first guard plate. For example, when a user's hand is in the access area and the second guard plate strikes the hand thereby slidably moving the second guard plate toward the first, the safety device is deactivated and the guard plates move away from the machine access area.

Abstract: A barrier guard for use with a winding machine or the like to prevent inadvertent access by the operator to a nip established between two cooperating rolls. The barrier guard includes first and second generally U-shaped guard bars, the second guard bar being pivotally connected to an elongated reach of the first guard bar which is adapted for pivotal connection to the machine frame for movement between an operating position wherein the guard bars prevent inadvertent access to the nip and a nonoperating position enabling operator access to the rolls for servicing and the like. A limit switch is mounted on the machine for actuation by the barrier guard so that operational rotation of the rolls is enabled only when the barrier guard is in its protective position.

Abstract: A protective guard arrangement to lessen the likelihood of a lacing machine operator receiving injury from a lacing machine while performing a stator assembly operation is disclosed including a sleeve-like guard open at opposite ends and pivotally attached to the machine by an arm which is power actuable to pivot between a retracted position and an operational position wherein operator access to the region of machine stator interaction is obstructed. The guard position is determined and machine operation impeded if the guard is in other than the operational position. In operation, enhanced operator safety is achieved by positioning a stator on a stator processing machine, actuating the machine, confirming the presence of the operator safety shield in a position to impede operator access to the region of machine action on the stator and initiating machine processing of the stator only after the shield presence has been confirmed.

Abstract: Safety apparatus for a bacon press or the like including a transparent safety door movable vertically between a raised retracted position in which a slab of bacon or other work to be pressed may be readily placed in the press and in which a pressed slab of bacon or the like may be removed from the press, and a lowered position in which access to the movable parts of the press is blocked. Movement of the safety door from its raised to its lowered position initiates operation of the press. Partial opening of the door during operation of the press immediately stops the press. The door is automatically raised at the end of an operating cycle of the press. The safety apparatus also includes the provision of safety screens which may be readily raised and locked in their raised position to permit access to the press and which may be readily lowered.

Abstract: An apparatus for inspecting motion picture film so as to locate edge cuts and tears, sprocket hole tears, improper splices and tape fragments or other objectionable foreign material on the film surface, which apparatus comprises a supporting frame with a front panel disposed in a generally vertical plane between parallel spaced end frame members and extending above a work table on which are mounted a plurality of work units and control apparatus therefor, the work units being disposed between the end frame members and along a generally horizontal path traversed by the film which is fed from a supply reel and gathered onto a take-up reel, both of which are driven by circuit controlled motors, the work units comprising a film cleaning unit, a defect detector unit, a viewer or an illuminated film viewing light box unit, a splice counter and footage measuring unit and a film tension sensor unit, with integrated circuit electronics for control of all machine functions and with safety devices including a transparen

Abstract: In accordance with the present invention a power press or tool guard is provided. The guard includes a first generally vertical protective portion which is made of a protective material which is at least partly transparent through which the operator may view the operation of the tool or press; and a second protective portion which depends from the first protective portion and extends inwardly toward the press or tool. The second protective porton includes a plurality of arms or tynes which are pivotably mounted on the lower portion of the first protective portion. The inclination of the arms or tynes on a given side of the guard may be varied by a control member mounted on the first protective portion. In addition the length of individual tynes may be adjusted by loosening fasteners which hold the tynes in place depending from the first protective portion.

Abstract: A collapsible electric foot-toe guard is employed with a loading platform having electric controlled lift and descent movements, functioning as a safety device in the protection against unwitting protrusion of human limbs into the path of descent of the platform lift, said collapsible foot-toe guard being comprised of an outwardly depended contact plate moveably engaging a base support plate through hinge means to permit said contact plate with contact thereof to fold toward the base support plate, such folding movement effective to break a normally open, held closed electric limit switch circuit to arrest descent of the platform lift.

Abstract: A blow molding machine wherein a shield is movable to and from an operative position in which it prevents access to the mold sections. The hydraulic motors which move the mold sections can receive pressurized fluid only when the shield is locked in the operative position by a roller. When the roller is retracted from its arresting position, a mechanical power train automatically closes valves which are installed in conduits connecting the motors with oil pumps. The valve elements of the valves are mechanically coupled to each other and to the roller, and are biased by a spring which tends to maintain the roller in the arresting position. A single-acting hydraulic cylinder is employed to move the roller from the arresting position. The shield can be moved by hand and/or by a double-acting hydraulic cylinder.

Abstract: A safety guard for a machine tool, such as a punch press, having an operating part, such as a ram, having a control member. The guard comprises gates between the operating part and a machine tool operator. One of the gates is slidable across the front of the machine tool. Another of the gates is disposed at the side of the machine tool and has a pivot on which it is swingable. The sliding gate carries a control actuator and closes on a path which intersects the free end of the swinging gate which has a bumper. The sliding gate is powered by an air cylinder having a control accessible to the operator. When either gate is open, the machine tool control member is deactuated and there is no danger that the machine tool will operate to endanger the operator's hands. The machine tool operator actuates the gate control to close the sliding gate.

Abstract: A safety system for garment pressers which have a head movable against a buck with a garment therebetween and steam vents opening through the head and buck, the safety system being operable to deactivate the press and raise the head in the event the operator's hand or arm should be caught in the press, and including an involuntary safety comprising a bar movable relative to the press during normal operation to engage a portion of the operator's hands or arms, if caught in the press, regardless of the attitude of the hands or arms, mechanism operable by such engagement to deactivate the press, possibly also including a voluntary, manually operable safety for deactivating the press intentionally, and a device for preventing either the involuntary or voluntary safety devices from being used to shorten the pre-set pressing cycle time to gain production at the expense of quality.