Mathematical demonstration device

Claim 2

A mathematical demonstration device comprising a plurality of point intersecting zero line indicators, each indicating a zero line between plus and minus values to the opposite side thereof, means for associating a physical plane with each zero line spaced to one side thereof, means for selectively positioning the plane associated with one of said zero line indicators to the opposite side thereof, the zero line indicators corresponding to X, Y and Z coordinate axes, said planes comprising an XY plane, an XZ plane, and a YZ plane, the selectively positionable plane constituting the XY plane, and means normally positioning said XZ plane and said YZ plane perpendicular to said XY plane.

Claim 3

The device of claim 1 wherein said last mentioned means enables a selective orientation of said XZ plane and said YZ plane coplanar with said XY plane.

Claim 4

The device of claim 2 including a supporting framework for said indicators and planes, said framework including opposed upstanding sides and an upstanding back, said XY plane being mounted between said sides and forward of said back, said means positioning said XZ plane pivotally suspending said XZ plane from said upstanding back, said means positioning said YZ plane pivotally suspending said YZ plane from one of said upstanding sides.

Claim 5

The device of claim 3 including a second YZ plane fixedly mounted on the second side.

Claim 6

The device of claim 4 wherein each plane is provided with a grid pattern thereon.

Claim 7

The device of claim 5 wherein said XY plane includes an aperture therethrough at each point of intersection on the grid pattern, and point locating rods selectively receivable in one or more of said apertures for vertical projection above the XY plane to define a Z point.

Claim 8

The device of claim 6 wherein said YZ planes also include apertures therethrough at the intersection points on the grid pattern, said apertures being utilized in the mounting of point orientating strings between said YZ planes.

Claim 9

The device of claim 7 including a trigonometric function demonstrating attachment, said attachment including a circular base, means for positioning said base on said XY plane, a pair of radially extending arms pivotally mounted on said base for angular adjustment thereabout, and at least one vertical rod slidably mounted on each arm for longitudinal adjustment therealong. 9. A mathematical demonstration device comprising a supporting framework, said supporting framework including a pair of laterally spaced vertically orientated side frames, said frames having a forward end and a rear end, a vertically orientated back frame extending between and interconnecting the rear ends of said side frames, said side frames including lower edges and upper edges, an XY plane forming panel positioned between and supported at the lower edges of said side frames, an XZ plane defining panel mounted on said back frame, and a YZ plane defining panel mounted on one of said side frames, both of said latter panels rising perpendicularly from the corresponding edges of the first mentioned panel.

Claim 10

The device of claim 9 including a YZ plane defining panel mounted on said second side frame in parallel opposed relation to the first YZ plane defining panel.

Claim 11

The device of claim 10 wherein said side frames include means along the upper edges thereof for selectively receiving and supporting said XY plane defining panel.

Claim 12

The device of claim 11 wherein said XZ plane defining panel and the first YZ plane defining panel are respectively mounted on the associated back and side frames for pivotal movement between a vertical position and an upwardly swung horizontal position so as to be orientated substantially coplanar with the XY plane defining panel in the upper supported position thereof.

Claim 13

The device of claim 10 including a zero line indicator extending perpendicularly from each plane at the center thereof for a central intersection thereof within the framework.

Claim 14

The device of claim 13 wherein each zero line indicator is in the nature of an elongated rod calibrated along the length thereof and provided with apertures therethrough at the calibrations.

Claim 15

The device of claim 10 wherein each plane panel has a grid defined thereon, the grid of at least the XY plane defining panel having a series of vertical apertures therethrough at each grid line intersection, said apertures selectively receiving point locating upstanding rods.

Claim 16

The device of claim 10 including a trigonometric function demonstrating attachment, said attachment including a circular base, means for positioning said base on said XY plane, a pair of radially extending arms pivotally mounted on said base for angular adjustment thereabout, and at least one vertical rod slidably mounted on each arm for longitudinal adjustment therealong.