Lifting mechanism with spring and screw
A hoisting device driven by a spring and a threaded lifting screw
This folio carries a study of a lifting mechanism operated by a spring and a threaded screw, named by the compiler a 'congegno con molle e vite di sollevamento' (mechanism with spring and lifting screw). A separate detail is captioned as showing the base of the device in its true form. Only these captions are transcribed for the sheet.
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Spring-and-screw lifting device
A hoisting mechanism combining a spring with a threaded lifting screw, as named in the caption. The screw raises the load while the spring stores or returns force. The compiler titles it a mechanism with spring and lifting screw.
Detail: the base in true form
A separate detail isolates the base of the device, captioned as drawn 'in propria forma' — that is, in its own true shape. Such notes indicate a plan or true-shape view of a single component.