Viewing device

Claim 2

A viewing device for a door, comprising a first tubular member extending through a door and having a predetermined diameter; a second tubular member having a smaller diameter than the predetermined diameter coaxially positioned inside the first tubular member; a substantially hollow hemispherical portion extending from the end of the second tubular member outside the door, the hemispherical portion having an outside convex surface covered with light reflective material; a viewing lens mounted in the hemispherical portion in the plane of a major diameter thereof substantially perpendicular to the axis of the tubular members; and mounting means slidably mounting the second tubular member for movement in axial directions in the first tubular member in a manner whereby when the second tubular member is positioned with the outside surface of the hemispherical portion thereof in substantial abutment with the end of the first tubular member outside the door, a viewer inside the door sees directly through the second tubular member and when the second tubular member is positioned with the outside surface of the hemispherical portion thereof spaced from the end of the first tubular member outside the door, a viewer inside the door sees anything reflected from the outside surface of the hemispherical portion through the first tubular member.

Claim 3

A viewing device for a door, comprising a first tubular member extending through a door and having a predetermined first diameter; a second tubular member having a second diameter smaller than the first diameter coaxially rotatably positioned inside the first tubular member; a window in the second tubular member in the area of the end thereof outside the door; a substantially planar mirror pivotally mounted in the second tubular member opposite the window at a predetermined distance from the end thereof outside the door in a manner whereby the mirror is positionable from a first position at substantially 45* with the axis of the tubular members extending from the pivot point to the end of the second tubular member outside the door to a second position substantially adjacent the inside surface of the second tubular member substantially parallel with the axis thereof; spring biasing means urging the mirror to its first position; and a third tubular member having a third diameter smaller than the second diameter coaxially slidably positioned inside the second tubular member in a manner whereby when the third tubular member is spaced from the mirror, the mirror is in its first position and a viewer inside the door sees anything reflected from the surface of the mirror through the third tubular member and sees anything around the end of the second tubular member outside the door by rotating the second tubular member about its axis and when the third tubular member is moved into abutment with the mirror, the mirror is moved by the third tubular member to its second position and a viewer inside the door sees directly through the third tubular member.

Claim 4

A viewing device for a door, comprising a first tubular member extending through a door and having a predetermined first diameter; a second tubular member having a second diameter smaller than the first diameter coaxially rotatably positioned inside the first tubular member; a window in the second tubular member in the area of the end thereof outside the door; a substantially planar mirror pivotally mounted in the second tubular member opposite the window at a predetermined distance from the end thereof outside the door in a manner whereby the mirror is positionable from a first position at substantially 45* with the axis of the tubular members extending from the pivot point to the end of the second tubular member outside the door to a second position substantially adjacent the inside surface of the second tubular member substantially parallel with the axis thereof; spring biasing means urging the mirror to its first position; and a third tubular member having a third diameter smaller than the second diameter coaxially slidably positioned inside the second tubular member in a manner whereby when the third tubular member is spaced from the mirror, the mirror is in its first position and a viewer inside the door sees anything reflected from the surface of the mirror through the third tubular member and sees anything around the end of the second tubular member outside the door by rotating the second tubular member about its axis and when the third tubular member is moved into abutment with the mirror, the mirror is moved by the third tubular member to its second position and a viewer inside the door sees directly through the third tubular member.