Description: Soviet Inertial ROLL-N-DRAW Rolling Parallel Ruler 30cm USSR Leningrad Model IR-2 A rolling ruler is a ruler that contains a cylinder much like a rolling pin inside, thereby enabling it to "roll" along a sheet of paper or another surface where it is being used. A rolling ruler can draw straight, parallel lines, and also has other instruments included, enabling it to do the jobs of a protractor. An example of converting rotational motion to linear translational. The groove (reference line) applied to the support shaft of the ruler during rotation of the ruler (mark line) allows you to measure the distance traveled by the ruler. A special window of the ruler allows you to observe the displacement of the groove along the applied scale with 1 mm divisions. It remains to draw lines at each alignment of the groove with the notch, the next mark, setting the distance between the lines to 6 cm with an accuracy of mm. In addition, the lower transparent part has a degree scale and can serve as a protractor. Sizes: - length 31 cm (12 inches); - width 7 cm (2.8 inches). The weight is about 1 pound. Made at the Leningrad electro-machine-building Association "Electrosila" named after S. M. Kirov in 1980th Condition: Very good vintage condition. The picture shows the actual item. What you see it’s what you get! Please add $7.99 for Ground Advantage USPS mail shipping in USA OR add $11.99 for FAST USPS Priority shipping in USA. ( USPS Priority mail (2 days average) with tracking number and $50 postal insurance.) We will ship it the same or next business day
Price: 29.99 USD
Location: Renton, Washington
End Time: 2024-11-17T03:30:45.000Z
Shipping Cost: 7.99 USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Country/Region of Manufacture: Russian Federation
