ES249669U - Fully mechanical safety mechanism, especially for elevators (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Mechanical safety mechanism, especially for lifts, essentially characterized by the fact that it comprises the combination of two pulleys, one placed at the top of the hole through which the elevator car slides and which is mounted on one lever and the other that is placed in the pit of it. The two pulleys are joined by a continuous cable that passes through them and that when being pulled with the hands by the two branches thereof at the same time will cause the aforementioned lever to swing and as from this lever a cable goes to the brake lever of the elevator machinery, pull it and it will release and at the same time also unlock a lever that carries a roller at its end, because the lever that blocks it is also pulled by the same cable that unlocks the elevator machinery. This last lever that carries the roller, when unlocked will swing because there is a spring that pulls it constantly and therefore the roller referred to will be in contact with the steering wheel of the elevator machinery. . Act next, if we pull a single branch of the cable indicated above, we will rotate the alluded pulley that is placed up in the hole where the elevator car slides and by means of a pinion that carries solidary to it and also with other pinions and chains, we will transmit this rotation of the pulley to the aforementioned roller, which in turn will turn the wheel of the elevator machinery moving the cabin thereof, with which we can take it to an exit door and with it the people who are trapped in an elevator car. . The cable will be pulled by people who have been trapped in the cabin, the elevator has broken or because the power has gone, and they will do it through a small window that leads the cabin and gives access to the hole where the elevator car slides, where the previously indicated cable passes, fully tensioned and centered to the window and parallel to the cabin and at a distance from it of about five centimeters or so. The tension of the cable is obtained by the pulley that is placed in the pit is mounted on a lever that carries a counterweight at the end that makes it swing down and pulls the two branches of the indicated cable at the same time. . The sheet of the little window alluded to, and which is placed in the elevator car, carries a steel needle, which only it can penetrate through a small hole of a protection that is placed on an electric button and when the leaf of the small window, press the needle to the electric pushbutton button that has its previous contacts connected in series with the control contactor coil of the elevator machinery and when the window is opened, it leaves the needle to press the electric pushbutton and it is cut the electrical circuit alluded to and therefore can not start the elevator machinery. In addition, there is also another electric push-button, which is pressed by the lever indicated above, which carries the roller at its end and its internal electrical contacts are also connected in series with the control contactor coil of the elevator machinery and therefore, when the mentioned lever is balanced, the electric pushbutton button will remain free and will leave the electrical circuit open and the elevator machinery will not be able to be marked. With this we will have a double security, that no accident can happen due to the start of the lift. (Machine-translation by Google Translate, not legally binding)