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them, in combination with a bearing-plate having curved surfaces arranged to fit the bearing-surfaces aforesaid, a spring attached to the inner face of the door-jamb and ad- justable connections between said spring and said door member whereby the opening of the door in either direction will put the spring under predetermined tension substantially as set forth. .4. A spring-hinge comprising the plates 1 and ia provided with thimbles carrying pins and adapted to be secured to the sides of the door, a horizontal plate 6 rigid with said pins and extending across the inner edge of the door, a bearing-plate outwardly presenting curved recesses adapted to seat said thimbles and the curved rear edge of plate 6, in corn-
bination with a curved spring 11 adapted to be rigidly secured at one end to the inner face of a door-jamb and to bear at its free end 20 on the said jamb, rollers mounted on the said free end and means for operatively connect- ing the said spring with the door member of the hinge, consisting of the plate 7 pivotally secured to the under side of the said plate 6 25 and the tension-rod 9 pivotally secured to plate 7 adjustably secured to the central por- tion of the said spring substantially as set forth. MICHAEL A. D. KINCAID. Witnesses: C. M. BOLLES, R. I. CAPERS.