Select your Products >

GP-322.1 BALL AND RING APPARATUS Comprising a brass ball 25mm dia, a brass ring mounted on a rod with a wooden handle. A chain is provided to hold the ball with the ring. The ball passes through the ring when cold but will not pass through after being heated.  GP-322.2 BALL AND RING APPARATUS For demonstrating thermal expansion. Comprising a brass ball and a brass ring, each on its own rod with wooden handle. Whilst the ball will pass through the ring when cold, it will not do so when heated. However, if both ball and ring are heated to the same extent, the ball will pass, thus demonstrating the “expansion of a hole” effect.  GP-323.1 BAR AND GAUGE A casted brass gauge with wooden handle, sliding fit over ends of bar and with hole 12.5mm bore in both arms, and a mild steel bar 110 x 12.5mm. with wooden handle.  GP-324.2 BAR BREAKING APPARATUS To show force of contraction or expansion. A heavy cast iron base with 4 uprights, on one end of which is fitted a hand nut, the other drilled with holes to carry a cast iron rod of 75x 6mm size bearing against narrow flats, overall size 330 x 60 x 60mm with 12 cast iron breaking rods.  GP-325.3 EXPANSION APPARATUS Comprising two iron casted stand of 180mm height joined by two chrome plated rods, with an expansion rod, length 380mm, fixed on one stand and resting on a Friction Pointer placed at the other. With graduated scale 0-90° with 3 expansion bars of Iron, Aluminium and Brass. Page : 1 | 2 | 3 |