Locking threshold

For use in a building having a passageway with a door for pivotally opening or closing the passageway, the door having a vertical edge, a horizontal bottom edge, and an inner vertical surface, the door being pivoted to the building at its vertical edge and inner vertical surface, a door locking device, comprising:

• a horizontal threshold that may be secured to a building passageway, the threshold having an upper surface, the height of the threshold being slightly less than the height of the bottom edge of a pivotal door secured to the passageway, the threshold having an elongated vertical slot therein communicating with said upper surface;
• an elongated striker bar received in said slot in said threshold, the striker bar having an upper horizontal edge, the striker bar being vertically slidable within said slot between a lower position wherein the upper edge is below the bottom edge of a pivotal door, and an upper position in which said upper edge is above, exteriorly of and displaced from a door bottom edge and parallel to and adjacent a door inner vertical surface;
• a slide bar positioned within said slot in said threshold and below said striker bar and being horizontally slidable within said slot between a first position and a second position;
• and
• means positionally coupling said slide bar to said striker bar whereby in said slide bar first position said striker bar is in said lower position and in said slide bar second position said striker bar is in said upper position.

For use in a building having a passageway with a door for pivotally opening or closing the passageway, the door having a vertical edge and horizontal bottom edge, the door being pivoted to the building at the vertical edge, a door locking device, comprising:

• a horizontal threshold which may be secured to a building in a passageway, the threshold having an upper surface, the height of the threshold being slightly less than the height of the bottom edge of a pivotal door secured to the passageway, the threshold having an elongated vertical slot therein communicating with said upper surface;
• an elongated striker bar received in said slot in said threshold, the striker bar having an upper horizontal edge, the striker bar being vertically slidable within said slot between a lower position wherein the upper edge is below the bottom edge of a pivotal door, and an upper position in which said upper edge is above the door lower edge, said striker bar having a lower edge defined in part by portions inclined at an acute angle relative to the horizontal length thereof;
• and
• a slide bar positioned within said slot in said threshold below said striker bar, the side bar being horizontally slidable within said slot, the slide bar having an upper edge defined in part by portions inclined at an acute angle relative to the horizontal length thereof, said slide bar and striker edge portions matching to provide means to vertically position said striker bar when said slide bar is slidably displaced.