Abstract: The invention relates to a system for joining the frame of a landing door (7) of an elevator to the wall structure (4) surrounding the frame, in such a way that the elevator shaft (5) is isolated from the rest of the space in the building. According to the invention, a heat-resistant protective element (9) flexible in normal temperature and at least in a temperature of 500.degree. is fitted between the frame (8) and the wall structure (4), said element being attached to the door frame (8) and to the shaft wall structure (4).

Abstract: A remote controller linkage is established to an elevator system having one or more elevators and using a data transmission network (21) including at least one serial communication bus for the transmission of control signals between the operating and/or other devices belonging to the system, car calls, landing calls and other information obtained from and/or generated by the devices included in the elevator system. At least one of the serial communication buses belonging to the data transmission network (21) of the elevator system is connected to a functional unit (3,7,10,13) fitted to receive messages sent to it by a remote controller (1,22). On the basis of the message received, the functional unit (3,7,10,13) transmits into the serial communication bus a message containing at least one control, call or other datum and the bus address of the transmitting functional unit (3,7,10,13).

Abstract: A procedure and an apparatus for converting a first alternating voltage into a second alternating voltage with respect to frequency and amplitude by means of first (1) and second (2) bridges having switches (T.sub.1 . . . T.sub.12), and a resonant circuit (3) connected between the bridges. The invention also relates to the use of a frequency converter for the control of a motor. The voltages of a supplying network and the voltages of a load (M) are connected across the resonant circuit (3) in an alternating fashion by means of bridge switches (T.sub.1 . . . T.sub.6) and bridge switches (T.sub.7 . . . T.sub.12), respectively. The voltages are alternately connected across the resonant circuit for a period equal to respective half cycles of the characteristic frequency of the resulting resonant circuit formed. When power is supplied, a bridge change is effected after each period.

Abstract: The invention relates to a procedure for fixing the guide rails (3) of an elevator car (4) and/or counterweight, in which procedure the guide rails (3) of the elevator car and counterweight are fixed to the wall (12) of the elevator shaft or to an intermediate member laid across the elevator shaft. The car guide rails (4) and counterweight guide rails (3) are locked at a desired distance from the wall by fixing elements (11) used to fix the counterweight guide rails (3).

Abstract: The invention relates to a compensation system in an elevator comprising an elevator car (2), a counterweight (3), a set of elevator suspension ropes (11) on which the elevator car (2) and the counterweight (3) are suspended, a traction sheave (5) whose motion is transmitted via the suspension ropes (11) to the elevator car (2) and to the counterweight (3), and a set of compensating ropes (4) and at least one diverting pulley (15) belonging to the suspension rope system (11) and at least one buffer arrangement (9) for the counterweight (3). The suspension ratio of the compensating rope (4) is the same as that of the suspension ropes (11), or multiplied by a coefficient. The rope suspension ratio on the side of the elevator car (2) is the same as or different than on the side of the counterweight (3). For the compensation of the elongation of the suspension and compensating ropes (11 and 4) of the elevator, a buffer (23) below the counterweight (3) has a provision for vertical adjustment.

Abstract: A procedure and an apparatus to determine the concentration of dissolved ammonia. A polypyrrole electrode (2), a reference electrode (1) and an auxiliary electrode (5) are placed in the liquid to be analyzed and the concentration of ammonia dissolved in the liquid is determined by a potential applied between the polypyrrole electrode (2) and the reference electrode (1) and of the current flowing between the polypyrrole electrode (2) and the auxiliary electrode (5). A polypyrrole layer (4) is formed on a platinum substrate (3).

Abstract: A procedure and an apparatus triggers the safety gear of an elevator at a speed lower than the gripping speed. The overspeed governor of the elevator comprises a pulley (3) driven by the safety gear rope and a brake (5) connected to it by knuckle pins (14,14'). The brake is provided with centrifugal weights (16,16'). Eccentric cams (15,15') and a brake disc (6) are also provided for the overspeed governor. At a speed lower than the gripping speed, using a separately controlled solenoid (30) attached to the overspeed governor, the brake (5) is caused to engage the pulley (3) by driving the plunger of the solenoid into the path of rubber rollers (31,32) rotating with the centrifugal weights.

Abstract: Elevator machinery is fastened by its top part to a mounting beam. The mounting beam is fixed in place to side walls of an elevator shaft. The elevator machinery includes a motor, a disc brake and a transaction sheave. The beam, on which the elevator machinery is mounted, is laid in a plane perpendicular to the axis of rotation of the machinery.

Abstract: The invention relates to a traction sheave elevator with drive machine below, comprising an elevator car (1) moving along elevator guide rails (10), a counterweight moving along counterweight guide rails (11), a set of hoisting ropes (3) supporting the elevator car and the counterweight, and in the bottom part of the elevator shaft a drive machine unit (6) comprising a traction sheave (7) driven by the drive machine and engaging the hoisting ropes (3). The drive machine unit (6) of the elevator is placed below the path of the counterweight (2). In the direction of the thickness of the counterweight, the drive machine unit (6) is placed substantially inside the shaft space extension required by the counterweight (2) on its path, including the safety distance.

Abstract: A device for the removal of rubbish gathered in the threshold of an elevator car, the threshold being provided with one or more holes below the bottom guide of the elevator car door. Below the one or more holes there is a rubbish collecting container or bag, in which the rubbish coming through the holes in the threshold is collected.

Abstract: The invention relates to a system for forming the jambs for elevator landing doors in a door opening (3) in the wall (2) between the elevator shaft and the landing. The jambs (4) consist of a skeletal structure (15,16,17) placed at the sides and at the top of the door opening and supporting the jamb structure, the skeletal structure being fastened to the wall by means of brackets (9) in a manner permitting adjustment in the direction of the plane of the door opening. Attached onto the skeletal structure is a surface structure (27,28) adjustable in the direction of the thickness of the wall. Each skeletal structure module is fixed to a bracket (9) in such a way that the position of the skeletal structure module can be adjusted in the direction of the plane of the door opening separately on the shaft side and on the landing side.

Abstract: A system for regional and local supervision and monitoring of elevator equipment, that includes a modular system containing a service center set of equipment and an on-site set of equipment connected to at least one building. Communication between these sets of equipment is implemented using a remote communication link. A connection from an elevator car to a service center and from a service center to an elevator car is provided through the on-site equipment. A connection between an elevator car and a preselected service point can be established by the on-site equipment.

Abstract: In this invention, an elevator motor (6) provided with an external rotor (17) and a traction sheave (18) is so implemented that it simultaneously constitutes the counterweight (26) of a rope-suspended elevator (1). In this motor/counterweight structure, rotating induction motors can be used. A gear is not necessary because the construction of the invention and the placement of the motor allow the use of a motor with a large diameter and therefore a high torque. As the length of the motor still remains small, the motor/counterweight of the invention can be accommodated in the space normally reserved for a counterweight in an elevator shaft.

Abstract: An electromagnetic brake is disclosed comprising a brake wheel, at least one friction surface attached to a respective friction plate and urged into frictional engagement with the brake wheel during braking. An electromagnet and an anchor serve to disengage the friction surface from the brake wheel when a current is supplied to the electromagnet. To compensate for the wear of the friction surface, the anchor is adapted to rotate in adjustment threads and thereby advance towards the magnet. Rotation of the anchor is caused by a coil spring. To maintain an essentially constant clearance between the electromagnet and the anchor when the brake is in the close state, the brake is provided with spring-loaded lugs mounted on a face of the anchor and protruding a predetermined distance towards the electromagnet.

Abstract: The traction sheave elevator comprises an elevator car (1) moving along elevator guide rails (10), a counterweight (2) moving along counterweight guide rails (11), a set of hoisting ropes (3) on which the elevator car and the counterweight are suspended, and a drive machine unit (6) comprising a traction sheave (7) driven by the drive machine and engaging the hoisting ropes (3). The drive machine unit (6) of the elevator is placed in the top part of the elevator shaft (15) in the space between the shaft space needed by the elevator car on its path and/or its overhead extension and a wall of the elevator shaft (15).

Abstract: An electromagnetic brake is disclosed comprising a brake wheel, at least one friction surface attached to a respective friction plate and urged into frictional engagement with the brake wheel during braking. An electromagnet and an anchor serve to disengage the friction surface from the brake wheel when a current is supplied to the electromagnet. To compensate for the wear of the friction surface, the anchor is adapted to rotate in adjustment threads and thereby advance towards the magnet. Rotation of the anchor is caused by a coil spring. To maintain an essentially constant clearance between the electromagnet and the anchor when the brake is in the close state, the brake is provided with spring-loaded lugs mounted on a face of the anchor and protruding a predetermined distance towards the electromagnet.

Abstract: An asynchronous motor is disclosed with stator and rotor windings placed in respective grooves, at least one of the windings being a cast winding. The grooves on the stator and those on the rotor are so inclined relative to each other that the groove inclination is approximately 60 to 90% of the pole pitch. In addition, to enhance the effect of the groove inclination, the stator and/or rotor is subjected, after the casting of the windings, to a heat treatment process in which the stator and/or rotor is heated to a high temperature and then cooled. The invention facilitates construction of an asynchronous motor having a reduced magnitude of generator torque of the motor and a changed rotational speed at which it occurs in relation to a conventional asynchronous motor.

Abstract: A method of and system for handing variable sized loads by transferring the loads between a storage base and a transport base by engaging a portion of at least one engagement member, e.g. a suction cup, with an engagement surface on a side or end of a load, and displacing the engagement member to thereby pull a load onto the transport base for transport by the transport base or to push a load from the transport base onto the storage base. The engagement surface has a size at least equal to that of the portion of the engagement member. The system includes a system for determining load position and size.