Tetrahedral stereotaxic jig

Claim 2

A stereotaxic jig of the character described, said jig comprising: a framework comprising six edge bars of substantially equal length and cross sectional area, said six edge bars being joined together substantially in the form of an equilateral tetrahedron with each end of each edge bar being connected to ends of two other edge bars substantially at each vertex of said tetrahedron; object holding means, mounted on said framework, for securing an object in a selected position substantially within said tetrahedron; and means, disposed at predetermined locations on said framework, for cooperation with support means during measurements of physical constants of said jig in combination with an object and of said jig alone.

Claim 3

A stereotaxic jig as defined in claim 1, and wherein said framework further comprises: four vertex connector members, each substantially in the form of a truncated three sided pyramid; each of said connector members rigidly fixed thereto one end of three of said six edge bars.

Claim 4

A stereotaxic jig as defined in claim 2, and wherein said means for cooperation with support means comprises: four vertex pins, each extending outwardly from a respective one of said connector members along an axis extending normal to the opposite side plane of said tetrahedron, and through a vertex point defined as an intersection of lines extending longitudinally of the three edge bars having their ends fixed to the respective connector members.

Claim 5

A stereotaxic jig as defined in claim 3, and wherein said means for cooperation with suppoRt means further comprises: six edge pins, each extending outwardly from the mid point of the length of a respective one of said six edge bars along an axis normal to said one edge bar and to an edge bar along the opposite edge of said tetrahedron, whereby said edge pins comprise three pairs of coaxially aligned edge pins.

Claim 6

A stereotaxic jig as defined in claim 4, and wherein said object holding means comprises: a cross bar adjustably secured to one of said edge bars; and a pair of spaced, parallel bars, each extending from one end of said cross bar to an edge bar parallel to said cross bar.

Claim 7

A stereotaxic jig as defined in claim 5, and wherein said object holding means further comprises: clamp means adjustably mounted on said parallel bars; object engaging means held by said clamp means; and indicator means for determining the position of an object when held in said jig.

Claim 8

A stereotaxic jig for use in determining mass parameters of a heterogeneous object, said jig comprising: six bars of substantially equal length and cross sectional area; four vertex connector members each in the form of a hollow, truncated 60* pyramid characterized by grooves defined in three edges thereof; each of said vertex connector members having ends of three of said six bars fixed in said grooves so that said six bars and said four vertex connector members form a framework defining the edges of an equilateral tetrahedron; four vertex pins, each vertex pin extending outwardly from the truncated portion of a respective one of said vertex connector members; six edge pins, each extending outwardly from the mid-point of the length of a respective one of said six bars along an axis normal to said one bar and to another of said bars on the opposite side of said framework, whereby said edge pins comprise three pairs of coaxially aligned edge pins; a cross bar adjustably secured to one of said six bars in a plane normal thereto; a pair of spaced, parallel, object supporting bars, each extending from one end of said cross bar to a one of said six bars that is parallel to said cross bar; a plurality of clamps adjustably positioned on said parallel, object supporting bars; object engaging rods held by said clamps for fixing an object in a determinable position in said framework; and index means on said parallel, object supporting bars, said index means being cooperable with said clamp means for use in determining said position.

Claim 9

A stereotaxic jig for use in determining mass parameters of a heterogeneous object, said jig comprising: six bars of substantially equal length and cross sectional area; four vertex connector members each in the form of a hollow, truncated 60* pyramid characterized by grooves defined in three edges thereof; each of said vertex connector members having ends of three of said six bars fixed in said grooves so that said six bars and said four vertex connector members form a framework defining the edges of an equilateral tetrahedron; four vertex pins, each vertex pin extending outwardly from the truncated portion of a respective one of said vertex connector members; six edge pins, each extending outwardly from the mid-point of the length of a respective one of said six bars along an axis normal to said one bar and to another of said bars on the opposite side of said framework, whereby said edge pins comprise three pairs of coaxially aligned edge pins; a cross bar adjustably secured to one of said six bars in a plane normal thereto; a pair of spaced, parallel, object supporting bars, each extending from one end of said cross bar to a one of said six bars that is parallel to said cross bar; a plurality of clamps adjustably positioned on said parallel, object supporting bars; object engaging rods held by said clamps for fixing an object in a determinable position in said framework; and index means on said parallel, object supporting bars, said index means being cooperable with said clamp means for use in determining said position.