This is non working pantograph for N Scale Kits trolley cars - especially the Key Systems Articulated Bay Bridge Cars, and the SP Box car.
https://www.shapeways.com/product/RACU2XETW/pacific-electric-box-car-1465-1466
Most of the other trolley cars from N Scale Kits used trolley poles also available in the Shop. This pantograph is in lowered form and cannot be raised, as there is no hinge on this model.
A version in raised form is available from Shapeways in the N Scale Kits shop.
https://www.shapeways.com/product/SK9E6U82T/raised-trolley-car-pantograph There are other, working pantographs available; but not from N Scale Kits!