Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7637352 | Circuit for controlling an elevator An elevator control system for controlling the movement of an elevator car up and down an elevator shaft between floors of a structure includes a call input device provided on each floor to indicate a passenger is waiting to be picked-up; a measuring device to indic... | 12/29/2009 |
| 7264087 | Control of a counterweightless elevator using total mass of the elevator Method and system of controlling a counterweightless elevator system provided with an elevator car and a variable speed drive with an electric motor. The elevator car load is weighed, and the elevator system is controlled in order to reduce the physical/electrical d... | 09/04/2007 |
| 7227322 | Hoist with detachable power and control unit A hoist is powered by a separate power unit. The hoist unit includes: a motor, a mounting connector, a spool, webbing, auto cut-off and a first portion of a mating electrical connector. The control unit includes a hollow pole, a hook, a second portion of the mating ... | 06/05/2007 |
| 7117981 | Load bearing member for use in an elevator system having external markings for indicating a condition of the assembly A load bearing assembly in an elevator system includes a plurality of discernable markings on an external surface of the assembly. A monitoring device includes at least one detector that detects locations of the markings along the length of the assembly. Changes in ... | 10/10/2006 |
| 7021427 | Lifting apparatus and method A method for intelligent control includes an exchange of historical parameters of events for operating a system and operating a hoist where an electric motor, preferably a DC-motor, is used for lifting and lowering a lifting belt. It can take place at different spee... | 04/04/2006 |
| 7011184 | Increasing traffic handling performance of an elevator system based upon load A method and apparatus for utilizing unused power available in an elevator that is not fully loaded to improve the traffic handling capacity of an elevator system. The present invention can be used to provide an optimized velocity profile for the elevator based on t... | 03/14/2006 |
| 6945738 | Method and apparatus for safety protection of temporary roof support Embodiments of the present invention are directed to a method and apparatus for safety protection control of temporary roof support. In one embodiment, a temporary roof support has a load sensing member. In another embodiment, a beam structure of temporary roof supp... | 09/20/2005 |
| 6910553 | Building elevator A building elevator with an elevator mast and an elevator car with at least one electric drive motor for the elevator car for moving the same along the elevator mast. A novel overload-prevention device for the building elevator has two drive motors with the device i... | 06/28/2005 |
| 6715587 | Load carrying means for cable elevators with integrated load measuring equipment A load carrying and measuring apparatus for cable elevators includes a support construction attached to an underside of a base frame or a carrier frame for an elevator car and a pair of cable rollers attached below the support construction for engaging a support cab... | 04/06/2004 |
| 6619434 | Method and apparatus for increasing the traffic handling performance of an elevator system A method and apparatus for utilizing unused power available in an elevator that is not fully loaded to improve the traffic handling capacity of an elevator system. The present invention can be used to provide an optimized velocity profile for the elevator... | 09/16/2003 |
| 5984052 | Elevator with reduced counterweight An elevator system includes a control system that determines the amount of load of the car, and that determines the operating speed profile of the car based upon the amount of load in the car. In a particular embodiment, the control system includes a load... | 11/16/1999 |
| 5852264 | Method and appartus for the measurement of the load in an elevator A method and apparatus for measuring a load in an elevator cage supported by a carrying frame. The elevator cage movable relative to the carrying frame and to an elevator shaft. The elevator cage may rest on spring elements, which bear on the carrying fra... | 12/22/1998 |
| 5780786 | Control apparatus for use in an elevator A control apparatus for use in an elevator is constructed in a compact and low-cost design without degrading the quality of service of the elevator by minimizing the current flowing through a hoisting motor. The control apparatus includes a load sensor an... | 07/14/1998 |
| 5490580 | Automated selection of a load weight bypass threshold for an elevator system An automated arrangement selects one of a plurality of load weight bypass thresholds for an elevator car. The selection depends, for example, upon the car direction and the time of day. Alternative embodiments of the arrangement utilize in the selection e... | 02/13/1996 |
| 5228537 | Safety mechanism for a vertical reciprocating conveyor A vertical reciprocating conveyor having a safety mechanism for automatically locking the conveyor at an elevated level. The conveyor comprises a cargo-supporting carriage which is guided for movement between a lower level and an upper level on a supporti... | 07/20/1993 |
| 5129485 | Home elevator load control The invention pertains to a load limiting device for elevating devices that are installed in homes to facilitate the transport of people or goods. The object of this invention is to provide a load limiting device for home elevators which will prevent the ... | 07/14/1992 |
| 4438830 | Stairway with fail safe power lift for lading, the infirm, wheelchair patients, and the like A combined stairway and power lift installable as a unit between upper and lower levels and including a fluid-powered lifting platform propelled along the stairs over an underlying pressure sensing mat extending beyond the approaches to the stairs and ope... | 03/27/1984 |
