US 4,696,356 A · Gun powder dispensing and measuring apparatus

Abstract

An automatic powder dispensing and measuring apparatus which automatically and rapidly and accurately delivers a preselected amount of powder such as gun powder to a scale. The powder dispensing apparatus is preferably in the form of screw threaded barrels rotatably driven by an electric motor which pick up powder from a chamber and dispense it from the end of the barrel to a scale. An electronic circuit controls the rotation speed of the screw threaded barrels in response to sensing means which cause no mechanical resistance to scale motion, positioned to sense the weight being measured by the scale. As the scale approaches the precise preselected amount of powder the electronic circuit responds by slowing the rotational rate of at least one of the screw threaded barrels to slow the feed rate and stop the rotation and flow of powder when the weight the scale reaches the precise preselected amount.

Claims20

Dependent claims

A dispensing apparatus for dispensing a precise amount of powder to a scale comprising:

a plurality of rotatable barrel means for dispensing said powder;
electric drive means for rotatably driving said plurality of barrel means;
said electric drive means being constructed to drive said plurality of barrel means at an independently variable rotational rate from one another;
weighing scale means;
opto-electronic sensing means mounted on said weighing scale electronically sensing the weight measurement on said weighing scale means as said powder is being dispensed;
electronic circuit means for receiving the output from said opto-electronic sensing means and controlling the electric drive means for rotatable driving said plurality of barrel means at a first faster net flow rate and for switching said electronic drive means to rotate said plurality of barrel means at a second slower net flow rate as the amount of powder dispensed to said weighing scale means approaches a preselected weight and stop said electric drive means from rotating said plurality of barrel dispensing means when the amount of powder on said scale reaches the preselected amount;
whereby precise amounts of said powder can be rapidly and automatically dispensed and measured.

4 more elements

Dependencies are inferred from the claim text.

Gun powder dispensing and measuring apparatus

Life of this patent

Gun powder dispensing and measuring apparatus

Life of this patent

Abstract

Claims20