Door lock employing interlocking hinge plates

{
  "publication_number": "US4015868A",
  "country": "US",
  "kind": "A",
  "title": "Door lock employing interlocking hinge plates",
  "abstract": "A lock assembly employing cooperating hinge plates interlocked with a removable bolt to prevent the non-hinged edges of a locked panel or door from moving away from its panel or door jambs.",
  "claims": [
    "1. A locking mechanism for the non-hinge side of a door like member pivotally mounted on a jamb comprising; a pair of apertured metallic plates, one mounted on said door like member and the other mounted on said jamb so as to be juxtapositioned to each other when the door like member is closed, each of said plates having ears extending laterally of their juxtapositioned edges which intermesh and coaxially align to define a bore for receiving a pin, a pin for insertion into said bore to interlock said plates together in door closed position, and chain means attached to one of said plates and said pin for securing said pin thereto when not inserted into said bore formed by the intermeshing ears of said plates, said means further comprising an apertured third plate having an open ended hollow cylinder mounted thereon for receiving and holding said pin when said plates are separated from each other, said third plate being attached to one of said plates by a screw passing through the aligned aperture of said third plate and an aperture in one of said plates.",
    "2. The locking mechanism set forth in claim 1 wherein: the longitudinal axis of said cylinder is parallel with the longitudinal axis of said bore when said ears are intermeshed."
  ],
  "description_excerpt": "This invention relates to door locking means and more particularly to a door locking means associated with the swinging side of a panel or door which prevents unauthorized opening of the panel or door by jimming of its latch bolt or removal of the stud from the hinges of the panel or door.\n\nHeretofore, attempts have been made to prevent the intrusion of a tool or other device between the edge of a locked door and its jamb at the location where the door bolt enters a socket catch on the jamb so that the bolt cannot be manipulated by the tool to permit an opening of the door when locked. These prior attempts have not been successfully marketed since either they were not effective or were too costly to manufacture and sell. Further, sliding bolt locks have been used on the interior of a door by supplementing the normal door locking mechanisms but these have been unsightly and many times marred the finish of the door.\n\nIn accordance with the invention claimed, a new and improved locking assembly is provided having hinge type plates which interlock in door closed position to prevent successful jimming of the latch bolt for permitting the door to be moved away from its door jamb.\n\nIt is, therefore, one object of this invention to provide a new and improved locking device for hinged doors or panels.\n\nAnother object of this invention is to provide a new and improved locking assembly which negates the effective unauthorized movement of the latch bolt of a door locking mechanism.",
  "cpc": [
    "E05C 19/184",
    "Y10T 292/432"
  ],
  "ipc": [
    "E05C 19/18"
  ],
  "inventors": [
    "Carl T. Buttler"
  ],
  "filing_date": "1976-02-12",
  "publication_date": "1977-04-05",
  "grant_date": "1977-04-05",
  "priority_date": "1976-02-12",
  "application_number": "US-65744576-A",
  "family_id": "24637225",
  "cited_by_count": 19,
  "citations": [
    "US1659822A",
    "US1924627A",
    "US2105714A"
  ]
}