Interlocking joints for a lock; a definition of impact
Perspective joints for a serraglio, with a note defining the 'blow' of a falling weight.
The upper half of this inverted leaf shows interlocking joints drawn in perspective, captioned as joints for a 'serraglio' (a locking clamp), first laid in red chalk and then gone over in pen. Below them a pen note defines a 'blow' (colpo) as the end of motion produced in an indivisible instant, at the terminus of the line traced by a falling weight. A further line of text runs across the head of the page that the transcription does not include.
On this page
Perspective joints for a locking clamp (serraglio)
Several timber members are shown cut with interlocking joints and drawn in perspective, captioned as joints for a 'serraglio.' They were first sketched in red chalk and then reinforced in pen.
Definition of a blow (colpo)
The note defines a blow as the terminus of motion created in an indivisible instant of time, because it is produced at the point where the line of motion made by the weight ends — the weight being the cause of the blow.