Screened photograph puzzle

{
  "publication_number": "US3854726A",
  "country": "US",
  "kind": "A",
  "title": "Screened photograph puzzle",
  "abstract": "A puzzle includes a plurality of similarly physically shaped puzzle pieces. Each piece reveals a portion of a black and white photograph which has been modified by a photographic screening and enlargement process. The resulting processed portion of the photograph on each piece reveals only black and white configurations of varying edges and densities. These edges and densities must be mated with those of other puzzle pieces in a correct relationship to reveal the entire processed photograph. In a method of making the puzzle, a screened photograph is taken of a conventional photograph so that screen lines appear on the screened photograph. The screened photograph is enlarged whereby the screen splits the photograph into spaced components aligned in the direction of the lines of the screen. The enlarged screened photograph is then cut, along the screen lines, or therebetween, into a selected number of pieces which form the puzzle pieces. Stiffner backing may be provided for the pieces.",
  "claims": [
    "1. A puzzle, comprising a plurality of puzzle pieces the combination of which forms an enlarged discernible composite photographic image including screen lines, enlargement of the original photographic image to produce the discernible composite photographic image on the pieces causing of plurality of shades of distorted and varying random-appearing densities to exist on the pieces, the puzzle pieces being defined physically along their edges by the screen lines, each puzzle piece having a substantially identical physical configuration as the other pieces, each puzzle piece having a specific pattern thereon forming a portion of the discernible composite photographic image, the pattern on each piece being defined by the plurality of shades, the shades having varying degrees of quality and being distorted to provide random-appearing densities of the shades on the pieces, the patterns on the pieces and the edges of the pieces defined by the screen lines being combinable in a predetermined alignment by matching the shades on the surfaces of the pieces and along the edges thereof to allow proper location of each piece within the puzzle to reveal the nature of the enlarged composite image.",
    "2. A puzzle as recited in claim 1 wherein the physical configuration of each piece is rectangular.",
    "3. A puzzle as recited in claim 1 wherein said plurality of contrasting shades are black and white.",
    "4. A puzzle as recited in claim 1 and further comprising means for supporting and providing backing for the puzzle pieces."
  ],
  "cpc": [
    "A63F 9/10",
    "A63F 2250/285",
    "A63F 9/1044",
    "A63F 9/32",
    "A63H 33/22"
  ],
  "assignees": [
    "BALDER A"
  ],
  "filing_date": "1973-11-02",
  "publication_date": "1974-12-17",
  "grant_date": "1974-12-17",
  "priority_date": "1973-11-02",
  "application_number": "US-41218273-A",
  "family_id": "23631932",
  "citations": [
    "GB761881A",
    "US2328281A",
    "US3596380A"
  ]
}