Patents by Inventor Lyman A. Rice

Lyman A. Rice has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 3952837
    Abstract: An elevator system selectively moves and stops an elevator car at a plurality of landings in response to the operation of a signaling system wherein a controlled rectifier operates with a control circuit to command the stopping of an elevator car at a floor in response to the manual movement of a call button. An electromagnet has a coil connected to the gating circuit of the remotely located controlled rectifier and includes a core element having a first end connected to a first pole of a permanent magnet and a second end providing a pivotal support to an armature removably connected to a second pole of the permanent magnet. The manual call button is connected to a flexible, resilient member which is connected to the armature at a position located between the electromagnet and the permanent magnet and provides a snap action response.
    Type: Grant
    Filed: November 1, 1974
    Date of Patent: April 27, 1976
    Assignee: Armor Elevator Company
    Inventor: Lyman A. Rice