Patents by Inventor Donald M. Schmidt

Donald M. Schmidt 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).

  • Portable panic alarm
    Patent number: 10192409
    Abstract: A portable panic alarm assembly includes a housing and an audible alarm device mounted within the housing. The alarm device is electrically and operably interconnected between first and second alarm contacts. A battery mounted within the housing has a pair of oppositely charged electrodes. A first electrode is connected to the first alarm contact. An actuator switch is slidably mounted in the housing and includes an actuator contact. The actuator switch is operably alternated between an open state, wherein the second battery electrode is disconnected from the second alarm contact to deactivate the alarm and a closed state, wherein the second battery electrode is connected to the second alarm contact to activate and sound the alarm.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: January 29, 2019
    Inventors: Donald M. Schmidt, Ronald J. Sargent
  • Portable Panic Alarm
    Publication number: 20180122195
    Abstract: A portable panic alarm assembly includes a housing and an audible alarm device mounted within the housing. The alarm device is electrically and operably interconnected between first and second alarm contacts. A battery mounted within the housing has a pair of oppositely charged electrodes. A first electrode is connected to the first alarm contact. An actuator switch is slidably mounted in the housing and includes an actuator contact. The actuator switch is operably alternated between an open state, wherein the second battery electrode is disconnected from the second alarm contact to deactivate the alarm and a closed state, wherein the second battery electrode is connected to the second alarm contact to activate and sound the alarm.
    Type: Application
    Filed: October 16, 2017
    Publication date: May 3, 2018
    Inventors: Donald M. Schmidt, Ronald J. Sargent
  • Padlock with alarm and shackle locking mechanism
    Patent number: 9115511
    Abstract: A padlock alarm system includes a shackle that carries a cut sensing element and a switch actuator that operates an alarm switch to activate an alarm when the shackle is cut. A shackle retention assembly is operated by a key cylinder to selectively open and close the lock.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: August 25, 2015
    Inventors: Donald M. Schmidt, Ronald J. Sargent
  • Method and apparatus for isolating well pump units
    Patent number: 4610176
    Abstract: The present invention relates to a method and apparatus for electrically isolating the pump unit for a well, such as an oil well and the like. More particularly, the present method and apparatus electrically isolates the pump unit from electrical currents that are generated within a well casing when a fluid is pumped from the well.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: September 9, 1986
    Inventors: Ernest A. Schmidt, Donald M. Schmidt