I want to share with the readers of his instrument who successfully work for a long time. Similar design available to me in the literature I have not met.
As you know, when you create drawings the designer requires pencils of different hardness in Order to combine the most used ones in one tool, I made clutch pencil with two mechanisms of attachment of the leads at opposite ends (see drawing), which allow you to have two stylus different hardness or sharpening, which is very convenient.
Double sided collet:
1 — head collet clamps; 2 — the United body of the pencil, 3 — bushings-limit switches collet mechanisms, 4 — Cam, 5 — axis Cam, 6 — lead, 7 — stylus sharpening “spatula”
For compression collets between them is eccentric, turning the wheel which is 90°, we get the opportunity to produce or supply a replacement stylus Alterations are minor and quite affordable for the manufacture of Amateur designers Will be very happy. if this is of interest to readers.
N. SEROV, design engineer, Privolzhsk, Ivanovo oblast
Recommend to read
BOLT INSTEAD OF KEY
In modern household appliances, sanitary wares found a lot of threaded connection parts with hexagon sockets for the key. If necessary to disassemble a node with such parts is not at any...
THE SIMPLEST DEPTH GAUGE
The pressure from the collet pencil, put on the shank of a suitable diameter drill bit, turning it into the simplest depth gauge required for control when performing nescopeck, equal to...
