# US 5,353,349 A · Telephone security shield > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,353,349 A - Document ID: US5353349A - Status: Granted - Kind: A - Application number: 08/059,101 - Filed: 1993-05-10 - Granted: 1994-10-04 - Earliest claimed: 1993-05-10 - Inventors: Lester Brown - Web page: https://patentgrep.com/patent/US5353349A ## CPC - H04M 1/675: the user being required to insert a coded card, e.g. a smart card carrying an integrated circuit chip - H04M 1/18: Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment (H04M1/19 takes precedence) - H04M 17/026: {Constructional features} - H01H 2239/032: Anti-tamper - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) ## Abstract A blank which may be erected to form a security shield for public telephones to guard against unauthorized visual access and theft of telephone calling card numbers and information. The blank includes a plurality of hingedly connected panels, and retention slots which engage cradle posts in a conventional telephone housing. A telephone security feature is provided by dimensioning the shield so that it extends around the periphery of the key pad and limits visual access to the user. The shield panels fold into a compact arrangement of overlying panels to facilitate its ready storage and accessibility to the user. ## Claims ### Claim 1 An opaque blank for forming a telephone security shield, the telephone including a housing, and a key pad mounted in said housing, the blank comprising: a plurality of hingedly connected panels which form the shield and define an interior area having an open end, said plurality of panels including first and second base panels hingedly attached at a central score line, said first and second base panels having first and second scored edges, and side panels hingedly attached to said first and second score edges; and retention means for removably securing said plurality of panels in surrounding and outwardly projecting relation to the key pad, and the open end of the shield in overlying relation to the key pad, such that when the shield is secured, the keypad is in full view only to a user directly in front of the telephone keypad. ### Claim 2 (depends on 1) An opaque blank according to claim 1, wherein the telephone further includes spaced cradle posts which project from the housing, and said retention means comprises first and second slots in the shield which receive the cradle posts. ### Claim 3 (depends on 2) A blank according to claim 2, wherein the telephone housing has an upright orientation, the cradle posts project from a base which is elevated relative to the housing, and said side panels further include cut-out corner sections which generally conform to the configuration of the base. ### Claim 4 (depends on 1) An opaque blank according to claim 1, wherein said first and second base panels, and side panels have a generally rectangular configuration. ### Claim 5 (depends on 2) An opaque blank according to claim 2, wherein the shield has a generally continuous and even interior edge, and said first and second slots are each disposed at an approximate 30.degree. angle formed by the intersection of said interior edge and lines congruent with said first and second slots. ### Claim 6 (depends on 5) An opaque blank according to claim 5, wherein said first and second slots each include opposing end cuts which define the width of said first and second slots. ### Claim 7 (depends on 1) An opaque blank according to claim 1, wherein said first and second base panels and side panels each have approximate equivalent dimensions, and said blank is foldable to arrange said first and second base and side panels in overlying relation. ### Claim 8 (depends on 4) A telephone security shield according to claim 4, wherein said first and second base panels and side panels each have the approximate equivalent dimensions, and said blank is foldable to arrange said first and second base and side panels in overlying relation. ### Claim 9 (depends on 8) A telephone security shield according to claim 8, wherein the blank has a generally continuous and even interior edge, and said first and second slots are each disposed at an approximate 30.degree. angle formed by the intersection of said interior edge and lines congruent with said first and second slots. ### Claim 10 An opaque blank for forming a telephone security shield, the telephone including a housing, spaced cradle posts which project from said housing, and a key pad mounted in said housing below said cradle posts, the shield having an open end, the blank comprising a plurality of hingedly connected panels which form the shield, and first and second slots in the shield which receive the cradle posts for removably securing the open end of the shield in overlying relation to the key pad. ### Claim 11 (depends on 10) An opaque blank according to claim 10, wherein the shield includes first and second base panels hingedly attached at a central score line, said first and second base panels having first and second scored edges, and side panels hingedly attached to said first and second score edges. ### Claim 12 (depends on 11) An opaque blank according to claim 11, wherein the telephone housing has an upright orientation, the cradle posts project from a base which is elevated relative to the housing, and said side panels further include cut-out corner sections which generally conform to the configuration of the base. ### Claim 13 (depends on 12) An opaque blank according to claim 12, wherein the shield has a generally continuous and even interior edge, and said first and second slots are each disposed at an approximate 30.degree. angle formed by the intersection of said interior edge and lines congruent with said first and second slots. ### Claim 14 (depends on 13) An opaque blank according to claim 13, wherein said first and second slots each include opposing end cuts which define the width of said first and second slots. ### Claim 15 (depends on 12) An opaque blank according to claim 12, wherein said first and second base panels and side panels each have approximate equivalent dimensions and a generally rectangular configuration, and said blank is foldable to arrange said first and second base and side panels in overlying relation. ### Claim 16 (depends on 13) A telephone security shield according to claim 13, wherein said first and second base panels and side panels each have approximate equivalent dimensions, and said blank is foldable to arrange first and second base and side panels in overlying relation.