Abstract: In a boat hoist having a platform for raising and lowering a boat by a normally manually rotated circular lift wheel, winch, and cable arrangement, an electrically powered drive motor assembly mounted adjacent the lift wheel and including a drive wheel biased between a position of non-engagement with the lift wheel, and a position of engagement therewith for rotation of the lift wheel, power for the drive motor provided by the DC power source within the boat being moved or by a shore supplied AC power source.

Abstract: An electric hoist comprising an electric motor and a sheave driven by the electric motor via a reduction gear. The reduction gear comprises a pair of helical gears meshing with each other. One of the helical gears is axially movably arranged on a shaft and is moved in the axial direction thereof when there is a load on the load chain supported by the sheave, and when the axial movement of the movable helical gear is detected by a sensor, the speed of rotation of the electric motor is automatically changed from a higher speed to a lower speed.

Abstract: An automatic brake for vehicle winch that is automatically applied when the applied torque of the drive motor ceases and automatically released upon application of motor torque. The brake features brake pad segments that move radially outward against the interior of the drum to affect braking and retract radially inward to affect releasing of the brake. The pads have tapered ends that mate with opposed frusto-conical shoes. The brake utilizes rotation of a cam rotatable with respect to a cam follower in one direction to force one shoe toward the other to force the pads radially outward to engage the interior surface of the drum. Rotation of the cam with respect to the cam follower in the opposite direction releases the braking action. A wave spring is incorporated to eliminate chatter as the brake is applied and released. The configuration of the brake components provides a conductive path for the dissipation of heat generated by the braking action.

Abstract: A remote control, ceiling mounted lifting device is provided for concealing, supporting and providing floor level access to audio visual objects such as color video/data projectors. The overall height of the lifting device is extremely shallow to allow the device to be mounted and concealed within the ceiling clearance area. The device has an outer frame with an open inner section. A support carriage is provided which is sized to fit and nest with the open inner section of the support framework. The carriage has an inverted U-shaped structure which allows the projector to be recessed upwardly within the confines of the carriage. A scissor-like stabilizer mechanism is mounted on each side of the carriage and support structure. These stabilizer mechanisms are located on the outer edges of the device to minimize the overall height of the device.

Abstract: An electric hoist which includes a drum mounted in a carrying frame, and an electric motor mounted on one end face of the carrying frame, and connected kinematically to a planetary reduction gear, whose housing is disposed totally inside the drum. The housing is connected to the drum by a gear diaphragm and a gear ring. The carrying frame is connected by a connecting shaft and spline joints to the output shaft of a stem, and the gear ring is shaped as an integral part of the drum.

Abstract: A control device for lifting winches, in particular for drilling rigs, uses an electric motor able to operate in all four quadrants of the torque-speed diagram. A control circuit procures controlled excitation of the electric motor. A manipulator on a control panel controls the control circuit by establishing, according to its position, a given speed request instruction. An indexing circuit for controlling the control circuit is adapted, on the bases of predetermined end of travel positions and a given law relating the speed to the difference in height between a given end of travel position and the actual height at the time in question, to establish a given speed request instruction. A comparator passes to the control circuit only the speed request instruction that it receives representing the lower speed.

Abstract: An overhead lifting apparatus adapted to a wheelchair lifts a disabled person from the wheelchair to a forward elevated position. The disabled person is rotated and lowered to a second desired location approximate to the front of the wheelchair. The overhead lifting apparatus includes a cable and frame assembly connected to the wheelchair, a harness coupled to the cable and fitted to the disabled person, and a cable driving means such as a winch and battery. The cable driving means is controlled from the wheelchair to lower and raise the disabled person. The winch and battery are located at a rearward portion of the wheelchair behind the hubs of the rear wheels. The location and substantial mass of the winch and battery preventing tipping of the wheelchair.

Abstract: A gearless drive machine for elevators has a machine frame on which are mounted a counter roller carrier, a bearing block and an end plate block. The elevator cable strand spacing can be adjusted by a counter roller coupled to the counter roller carrier, whereby both a left-hand and right-hand overhang of the counter roller is possible with the same construction of the machine frame. A main shaft is supported at two places at a drive output end by a moveable bearing mounted in the bearing block and a fixed bearing mounted in the end plate block. A drive pulley having brake disc is located between the bearings and is coupled to the main shaft by a first detachable coupling. The support of the drive pulley on both sides thereof allows great radial loads with only small deformations of the main shaft. A hoist motor supplied with alternating voltage has a stator with windings and a rotor with a rotor hub slidable onto the main shaft.

Abstract: A variable speed electric hoist includes an invertor unit for frequency-controlling the speed of rotation of a lifting motor, a brake on/off section for turning off a brake according to a command produced from the invertor unit while the invertor unit is supplying a three-phase AC current to the lifting motor. The electric hoist also includes an emergency brake turn-on section for detecting a condition that a command produced from the invertor unit is not stopped after a lifting/lowering command is stopped to thereby turn on the brake upon detection of the condition.

Abstract: A lifting machine has a drum unit comprising a motor attached to a frame of the lifting machine, a gearbox and a rope drum, this unit being resiliently attached to the frame of the lifting machine.

Abstract: A hoist apparatus comprising a stationary shaft supported by a support, and a sheave having a cavity with a side opening detachably, and rotatably, mounted on the shaft. A motor stator assembly is mounted on the support member and extends into the inner space through the side opening, and a motor rotor assembly is disposed within the inner space in an electromagnetically inductive relationship with the motor stator assembly. The motor rotor assembly is detachably connected to the sheave by a connecting assembly including a bolt fastening the motor rotor assembly to the sheave.

Abstract: An elevator hoist apparatus with an outer rotor motor includes a support structure, a sheave rotatably mounted on the support structure, and an electric motor mounted on the support structure for driving the sheave. The motor includes a stator fixedly mounted on the support structure, a motor frame mounted only to the sheave for rotation therewith, and a rotor mounted to the frame in an electromagnetically inductive relationship with the stator. The support structure comprises a pair of pedestals and an elongated support member supported at its opposite ends by the pedestals for supporting the sheave and the stator.

Abstract: A drive circuit for setter rollers is automatically coordinated with a spool drive to insure a condition of tension in a longline at all times during the setting operation. The apparatus includes various rollers to achieve the method, and in addition, circuits for controlling the motor adapted to drive the speed rollers at different but correlated rates of speed. While the fluidic circuit is hydraulic, alternative electronic controls may be employed.

Abstract: An operating device for an electric chain block having an electric motor for a raising and lowering operation comprises a cylinder body interposed between one end of a chain for raising and lowering an object and a hook for hanging the object, a cylindrical grip fitted on the cylinder body and slidable upwardly and downwardly over predetermined distances relative to the cylinder body.

Abstract: The invention relates to a winch for a vehicle which is compact enough to be located at the rear of the vehicle without causing due limitation to the cross country ability of the vehicle and yet at the same time, provides a reliable winch for drawing a vehicle to be towed to it and enabling the coupling member to be physically secured to the vehicle when the cable is in the fully wound position.

Abstract: An elongate portable winch is set forth powered by a series of rechargeable batteries. The winch is enclosed within an axially symmetrical elongate housing terminating in a securement hook at one end and a reel-in line at the other end securable to a windup drum actuated by an external switch secured to a handle integrally secured to said housing wherein a series of gear reduction drives multiplies the torque output of the apparatus to apply sufficient force to the drum. The securement hook, batteries, electric motor, gears, and windup drum are aligned within the elongate housing to enable ease of portability by use of an associated handle.

Abstract: An internally mounted rotary drum drive mechanism optimizes the space within a drum by utilizing a rim-mounted, motor-driven rotating gearbox for applying torque to the drum through a ring-type mounting flange releasably secured between the gearbox and an internal wall of the drum. Radial screws extend through oversize apertures in the wall of the drum for releasably attaching the gearbox to the drum. A motor mounting flange locates the motor in driving position adjacent the gearbox. The motor mounting flange is supported on a reactor tube extending out of the drum and the reactor tube is supported by an external anchor plate. The drive mechanism may be situated at one end of the drum, and a bearing assembly of similar character to the drive mechanism, but using a rim-mounted dummy gearbox, may be provided internally at the other end of the drum.

Abstract: A hoist and method are provided for lifting objects inside a vessel having a wall defining a port and having a platform on the exterior of the wall. The hoist includes a frame with a support portion extending outwardly from the port adjacent the platform and a cantilevered portion for extending through, and inwardly from, the port. A suitable clamping system is provided for clamping the frame support portion to the platform. A hoist cable is provided along the frame from the support portion to the cantilevered portion and extends over a sheave at the end of the cantilevered portion so that it hangs down inside the vessel. A winch is operatively engaged with the hoist cable and is mounted to the frame support portion for feeding out and retracting the cable whereby the end of the cable may be raised and lowered inside the vessel.

Abstract: An operating device for an electric hoist, comprises a switch box and a cylindrical body connected to a lower end of a chain depending from a main body of the electric hoist for lifting a load. To a lower end of the cylindrical body is connected a lower hook hanging the load to be lifted. The operating device further comprises a grip vertically slidably fitted on the cylindrical body and kept at a substantially mid position of a slidable distance of the grip relative to the cylindrical body, raising and lowering switches for raising and lowering the load provided in the cylindrical body to be actuated by a striker fixed to the grip, high and low speed alteration switch provided in the switch box for changing high and low operating speeds of the electric hoist, and a stepless speed adjusting device for adjusting the high and low operating speeds of the electric hoist in a stepless manner.

Abstract: A stepless speed change electric chain block includes a DC motor for driving a load sheave. The chain block comprises a phase control circuit having a variable resistor, a capacitor, a two-way trigger diode, and a triode AC switch for receiving alternating current from alternating power source to control it in phase, a full-wave-rectifier for receiving alternating current controlled in phase in the phase control circuit to convert it into direct current which is supplied into the DC motor, and mechanical brake means provided in a transmission between the DC motor and the load sheave for braking rotation of the load sheave in a winding-off direction. With this arrangement, as the speed setting for winding operation is effected only by the phase control circuit, so that the constitution of the block is simplified and inexpensive in comparison with the prior art. All the supplied power is effectively utilized for operating the chain block.

Abstract: An operating device for an electric hoist having a DC motor for raising and lowering an object, comprises a low speed adjusting setting unit (VR1) and a high speed adjusting setting unit (VR2) provided in a control box of the hoist. The operating device further comprises in the control box a two-step push-button switch (PB-U) for the raising operation for switching over the low speed adjusting setting unit and the high speed adjusting setting unit to connect either of the units (VR1 and VR.sub.2) to a speed-change control circuit by pushing the two-step push-button switch (PB-U) to either of first and second step positions, and a two-step push-button switch (PB-D) for the lowering operation for switching over the low speed adjusting setting unit (VR1) and the high speed adjusting setting unit (VR2) to connect either of the units to the speed-change control circuit by pushing the two-step push-button switch (PB-D) for the lowering operation to either of first and second step positions.

Abstract: An internally mounted rotary drum drive mechanism optimizes the space within a drum by utilizing a rim-mounted, motor-driven rotating gearbox for applying torque to the drum through a split ring-type mounting flange releasably secured between the gearbox and an internal wall of the drum. Radial screws extend through the wall of the drum for releasably attaching the mounting flange and axial screws attach the mounting flange to the gearbox housing. A motor mounting flange locates the motor in driving position adjacent the gearbox and the motor mounting flange is provided with a peripheral notch for obtaining access to the gearbox mounting flange fasteners during assembly and dismantling of the mechanism.

Abstract: A lift sheave arrangement is disclosed which includes a static shaft and a sheave mounted for rotation about the static shaft. The sheave has a first portion for receiving a cable which is to be connected to a lift car and a second portion which includes a brake on its inner circumference. A motor, the brake and second portion for driving the sheave about the static shaft are arranged in the same plane normal to the shaft. The motor has a plurality of movable magnets and a plurality of stationary magnets. The brake drum of the brake includes part of the magnetic circuit between adjacent magnetic elements in the movable magnetic elements.A magnetic actuator is arranged for allowing movement of the brake to apply the brakes and a sensor is provided for sensing the magnetic flux in the actuator when the actuator is actuated to move the brake so that a control circuit can vary the voltage applied to the actuator to enable the brake to move smoothly under the influence of the actuator.

Abstract: A winch design for consumer applications wherein the planetary carrier assemblies are split between the two ends of the drum. The drum is mounted on heavy duty brackets and the housing elements surround the planetary carrier assemblies and also, independent of the drum, are mounted to the brackets. The housing elements are molded with the ring gear configured therein. They are produced from the same moldings. Interconnection as between the planetary carrier assemblies is through an interconnect shaft that is driven by the output shaft of the first planetary carrier assembly (coupled to the motor drive shaft) and carries the sun gear of the second planetary carrier assembly.

Abstract: Capstans and winches secured to beach or boat launching ramp. Operate on electric power for predetermined time interval upon insertion of coin, token or card for common use by the general public. Assist in launching and especially hauling out of watercraft and watercraft carriers. Also reduces potential for personal injury and property damage from loss of traction on slippery slopes.

Abstract: The front endcap (10) and mounting bracket (26) for a motor are unitary for motor interchangeability. The endcap (10) has a disc-like portion (12) and a tubular boss (22) extending therefrom that receives in its bore the motor shaft (44) and bearings (68). A portion (50) of the motor shaft extends beyond the boss to receive a sheave (56), a rim portion (72) of which extends over the boss so that the sheave load is more in line with the bearings. Furthermore, the sheave may be bolted to the endcap boss for motor replacement.

Abstract: There is disclosed a pendant control arrangement for overhead electric hoists featuring a helically wound elastically memorized insulative cord enclosing a plurality of electrical conductors for attachments at their opposite ends to terminals in the hoist motor and in the pendant control switches. This coiled cord encloses a straight line strain relief cable or the like which is of a length equal to the anticipated length required to support the pendant switch control panel at proper elevation below the electric hoist, and simply mechanically connects at its opposite ends to said motor and said control panel. Thus, changes in the distance required between the hoist motor and the control panel are more readily accommodated by reason of the mechanical connections of the relief cable, while leaving the electrical connections of the control cord conductors undisturbed.

Abstract: Load position limits and incremental lowering of a load are controlled by a microprocessor forming an interface between an operator's control station and the hoist. Other hoist status conditions such as underspeed and overspeed of the hoist motor are detected by the microprocessor based upon hoist speed during the position limit setting cycle. Still other hoist status data such a motor overheating, number of power-up cycles, number of under and overspeed shut-downs, number of power failures, etc. are input to the microprocessor and all such data as up-dated are entered into a non-volatile memory which, when extracted, permits maintenance scheduling.

Abstract: An apparatus to aid in loading, holding and unloading a spare tire assembly mounted beneath a vehicle such as a truck. The apparatus includes a winch, an electric motor, coupling structure for operatively coupling the winch and motor, and an electric circuit which allows the motor and winch to be operated only by authorized personnel whereby the spare tire assembly can be safely secured underneath the vehicle.

Abstract: A drum winch apparatus having an alternating current motor and direct current operable clutch and brake coils together with a control circuit for energizing these member is disclosed. The control circuit includes alternating current switching of DC current flows, operator control of both reeling in and unreeling drum functions, and selected use of separate brake release and brake hold off coils with a combination of full wave and half wave energizing currents.

Abstract: The cable pulling device includes a control unit having a force indicator gauge and a switch and circuit breaker assembly in series in the hot wire to the electric motor which rotates the capstan for cable pulling. Power to the electric motor can thereby be interrupted manually or automatically in the event cable pulling force approaches an overload level where damage could occur to the device, accessories and/or cable. The control unit is detachable from the puller device for location close to the operator during a pull.

Abstract: A power winch mechanism having a rotatable cable drum in which is rotatably mounted a D.C. electric drive motor. One end of the cable drum, and one end of the electric drive motor is operatively supported by a fixed support member on a base plate. The other ends of the cable drum and the electric drive motor are rotatably supported by a fixed gear housing, axially spaced apart from the first mentioned fixed support member. The electric drive motor is provided with an elongated output shaft that extends into the fixed gear housing, and it carries a fixedly mounted sun gear that is in mesh with, and drives a pair of planetary gears. The planetary gears are in mesh simultaneously with a fixed ring gear mounted in the fixed gear housing and a rotatable ring gear that is fixed on the cable drum. The rotatable ring gear on the cable drum is provided with two more teeth than the fixed ring gear on the fixed gear housing.

Abstract: A system for identifying emergency exits in a building includes a strobe light which is tethered at an elevated location with respect to the floor of the building. The strobe light is normally held at the elevated position by an electromagnet, which electromagnet is kept energized as long as a smoke detector connected thereto does not sense a dangerous level of smoke. As soon as the smoke detector detects smoke above a certain threshold level, the electromagnet is deenergized and the strobe light drops to a position suspended just above the floor. The strobe light includes its own battery source which is connected to the strobe light by a switch which closes when the strobe light is dropped. An electric motor is provided to rewind the tether when the smoke detector no longer indicates an emergency situation. By tethering the strobe light, the light can be dropped beneath the smoke level in the building, allowing people crawling along the floor to determine the location of emergency exits.

Abstract: This electric hoist incorporates a wedging-groove pulley controlling a free-end wire-rope and comprises an epicyclic reducing gear surrounding the motor output shaft and providing a high reduction ratio with a minimum axial length; the gear comprises a sun wheel rigid with the motor shaft, planets meshing with this wheel and also with two internally toothed annuli having different tooth numbers, namely a fixed annulus and a driven annulus rigid with the wedging pulley coaxial with the motor shaft.

Abstract: A device for driving a rope-like power transmission member for a window lifting mechanism, such as in a motor vehicle, includes a casing with a worm rotatably supported within the casing, a worm gear in the casing and in engagement with the worm and an electric motor driving the worm. A rope drum is positioned within the casing and a coupling part interconnects the drum and the worm gear. The casing has an opening for moving the rope out of the casing. A sealing plate is located between the worm gear and the coupling part and divides the interior of the casing into a first partial space containing the worm and worm gear and a second partial space containing the drum and the coupling part. The sealing plate is arranged in form-locking engagement with the worm gear and it has an annular area facing toward the drum which is in contact with an annular area on the inner surface of the casing.

Abstract: In a traction machine for an elevator having a reduction gear enclosed within a main housing and having an input shaft and an output shaft together with parallel shaft gears, a traction sheave connected to the output shaft, an electric motor connected to the input shaft, a brake gear, and a flywheel, at least one of the electric motor, the brake gear and the flywheel is arranged on the same side as the traction sheave, whereby a peripheral portion of one of the side surfaces of the at least one of the above elements confronts a peripheral portion of one of the side surfaces of the traction sheave.

Abstract: A device for precisely positioning a hoist suspended load which operates by temporarily releasing the hoist brake for a predetermined limited time period without actuating the hoist motor so that the load is lowered through a small incremental distance by the influence of its own weight. A control signal may be generated by a delay timer, a repeat cycle timer, a digital timing device or a device for detecting the degree of movement of the load carried by the hoist.

Abstract: An emergency brake control system for hoists including means for generating a first electrical signal indicating the direction of travel of a conveyance, means for generating a second signal indicating the presence or absence of an emergency situation and control means responsive to the first and second signals for immediately applying the emergency brake when the conveyance is descending and an emergency exists and delaying application of the emergency brake only after the conveyance has come to a complete stop when the conveyance is ascending and an emergency exists. Overriding safety features may also be employed to provide immediate application of the emergency brake regardless of the direction of travel of the conveyance of certain emergencies, such as over travel of the conveyance, exist.

Abstract: An electrical drive having a sheave, motor drive shaft, and first and second bearings in coaxial alignment. The first bearing rotatably mounts the sheave on an adaptor member which additionally functions to complete the enclosure of a drive motor module removably attached thereto. The second bearing, which is part of the drive motor module, supports one end of the motor drive shaft, while the other end extends through an opening in the adaptor module into driving engagement with, and support by the sheave.

Abstract: The invention relates to electrical drive apparatus for a vertically displaceable blackboard. In order to obtain synchronous operation of such drive apparatus either one motor, one shaft, or two motors connected by means of an electrical shaft were employed. The apparatus according to the invention operates with an electric motor which is combined with a worm drive, a drive sheave, and a slip coupling to a unit which is mounted at the top inside the guide beams of the blackboard, with the motor arranged vertically and having a hollow shaft through which the drive cable is guided. One such drive apparatus is mounted in each guide beam at its top, with simultaneous switching on and switching off without an electrical shaft.

Abstract: In an electric winch system, wherein the system includes an electric winch provided on the outside of a vehicle body, a DC power source provided within an engine room, a pair of connector parts consisting of one connector part connected to the DC power source and exposed to the outside of the vehicle body, and other connector part connectable to one connector part, and a control switch connected to the other connector part, thereby controlling the running of an electric motor of the electric winch by way of the pair of connector parts, when the pair of connector parts are joined together, this electric winch system comprises; a power source switch provided between the DC power source and the electric winch in the vehicle body; and a power-source-switch controlling means adapted to turn the power source switch to a close position only when the pair of connector parts are joined together.

Abstract: A motor vehicle hoist has a closed rope loop which is driven by a permanent magnet electric motor having a flat housing and a worm with a worm wheel. The worm is fastened to an end of the motor shaft which extends into an adjacent gear box, and turns a rope drum. The motor stator includes an axially oriented, magnetically nonconductive frame, which holds the rotor and at least one permanent magnet and which supports housing halves which serve, on both sides, as pole pieces. The worm wheel and rope drum are rotatably mounted on a common axis in the gear box. The motor is useful for opening windows, doors, and sliding roofs of vehicles.

Abstract: A capstan for towing a rope which leads a marine vessel to a berth comprises a cylindrical drum having a negative crown and around which the rope is wrapped, an electric motor and a cycloid reduction gearing which connects the drum with the motor, both the motor and gearing being disposed within the drum. The motor has a shaft disposed in alignment with the axis of the drum. The reduction gearing comprises an eccentric cam mounted on one end of the shaft, a planet gear slidably mounted around the cam, and an inner gear mounted inside the drum. The inner gear meshes with the planet gear and has a number of teeth which is greater than that of the planet gear by one or more teeth. The planet gear is formed with a plurality of circular openings which are disposed on a circle of a given radius struck from the center thereof while the motor firmly carries a plurality of pins which extend upwardly through the openings.