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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7299898 | Progressive safety device A progressive safety device for an elevator includes a brake unit and an actuating unit. The brake unit has a first brake shoe with first spring assemblies and a triangular rotatable support with second and third brake shoes. The actuating unit has an electromagneti... | 11/27/2007 |
| 7128189 | Equipment for engaging a safety braking device for a lift cage A tripping device for engaging an elevator lift cage safety brake has actuating levers arranged at a rotary axle for engaging safety brake wedges of the safety braking device. Each actuating lever has a longitudinal slot matched to the diameter of the rotary axle, w... | 10/31/2006 |
| 7080717 | Emergency brake apparatus of elevator In an elevator emergency braking apparatus, a braking device main body has a main body braking surface facing a main rope and positioned at a first side of a main rope array, and a tapered surface facing the main body braking surface on an opposite side of the main ... | 07/25/2006 |
| 6315089 | Safety lock device with rotating clover mechanism A safety lock device including a clover mechanism mounted on a rotating shaft to be used with an unbalanced free-fall dog that precludes rotation of the rotating shaft upon rapid acceleration or excessive speed of the rotation of the shaft. The free-fall ... | 11/13/2001 |
| 5518087 | Rail brake apparatus for a linear motor elevator A rail brake apparatus for a linear motor elevator includes mating magnetic cores with coils and spring, brake arms connected with magnetic cores and pivotally engaged with a shaft, linings disposed at both ends of the brake arms for braking a guide rail,... | 05/21/1996 |
| 5487450 | Braking apparatus and method for a rail-bound carriage of an inclined or vertical elevator An apparatus and method for braking a carriage which travels on rails of an inclined or vertical elevator. The elevator includes a cable driving device having cables connected to the carriage for moving the carriage along the rails. The carriage has a mai... | 01/30/1996 |
| 5377788 | Safety catch device for elevators A safety catch device for elevator cars guided on at least one guide rail includes a braking device acting on the at least one guide rail for braking the elevator car and a control device for controlling the braking force of the braking device in dependen... | 01/03/1995 |
| 5005681 | Brake mechanism for a storage and retrieval machine An overtravel brake system for a storage and retrieval system which is automatically actuated when the load carriage lift motor is deenergized and the load carriage moves downward. The brake system includes a dog mounted on the load carriage and engageabl... | 04/09/1991 |
| 4653612 | Speed limiter for lifts provided with catch device The present invention concerns a speed limiter for lifts provided with catch device. The tension force acting on the lifting rope of an elevator is greatly variable. A detrimental feature herein is the jerky stopping of the rope sheave, resulting in loopi... | 03/31/1987 |
| 4029177 | Overspeed brake for a lift car A rotatable sheave is mounted on one end of a platform lift, enabling the sheave to be turned by friction of guide cables as the platform descends. Dogs attached to the sheave extend themselves due to centrifugal force as the platform moves faster. At a s... | 06/14/1977 |
