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School Spano |
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Function To show the functioning of the slide-rule |
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Description Two meter length model with numeration and graduation visible from a distance. | |||
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School Castelvė |
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Function Demonstrative model. |
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Description Wooden model with engraved scale. | |||
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School Spano |
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Function The model is made in hard wood and we can use it as a model of the vernier. | |||
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Description The scale and the vernier have the centrimetic division visible from afar. The length is 50 cm. | |||
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School Spano(1), Castelvė (2) |
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Function To measure small distances. | |||
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Description The screw is grinded along the whole length. The surfaces are perfectly flat. The micrometer has a ratchet jack for its progress. | |||
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School Azuni |
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Function To measure small distances. | |||
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Description On a wooden basis is fixed a little bridge in which centre there is a graduated disk divided into 180 parts. In the centre of the disk there is a screw. A coaxial needle is used as indicator of the height of the body placed under the bridge. | |||
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School University (1), University (2) |
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Function To measure small differences in height. | |||
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Description It is formed by a telescope fixed to a graduated pole that lies on a tripod with levelling screws. The telescope can rotate on a plane perpendicular to the pole and can shift vertically on the same. | |||
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School University |
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Function To measure small differences in height. | |||
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Description From a rectangular heavy metal basis rise two brass columns with a brass square basis. A microscope is placed horizontally on each column, whose height we can change with a tangent screw. On each of the columns there is a scale that indicates the height of the microscope. | |||
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School University |
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Function To measure the curvature radium of a spherical surface. | |||
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Description The instrument is made of brass and leans on three iron pointed ends. The screw has a 1 mm pitch. The head holds a disk divided into a hundred parts which means that the instrument measures the hundredth part of a millimetre. | |||
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School University |
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Function For precision measure of angles. | |||
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Description The main fixed angle measures 90°, and the vernier angle is divided into 20 parts that correspond to 19° of the main scale. The precision is a twentieth of grade. | |||
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School University (1), Spano (2) |
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Function For precision measure of angles. | |||
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Description (1) The instrument, all in brass, is made of a pole that stands on a tripod with level screws. At half height there is a 24 cm diameter graduated circle, that rotates around the pole. A telescope that can rotate on a vertical plane is anchored to the circle. On the top of the pole we have a horizontal bar. At one end of this bar there is a 15 cm diameter circle that can rotate on a vertical plane. On the circle another telescope is anchored. At the other end of the bar, there is a balance weight. Two air-levels are placed horizontally on the bar. | |||
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School Castelvė (1), Pellegrini (2) |
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Function To find a horizontal line or a horizontal plane. | |||
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Description It is a small instrument on a painted sheet metal. It has a case in the same material. | |||
