Hand-operated equipment for precision dusting

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Material Information

Title:
Hand-operated equipment for precision dusting
Physical Description:
Book
Creator:
Batchelder, C. H
Cosenza, A. V
United States -- Bureau of Entomology and Plant Quarantine
Publisher:
U.S. Department of Agriculture, Bureau of Entomology and Plant Quarantine ( Washington, D.C )
Publication Date:

Record Information

Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
aleph - 030353012
oclc - 781943485
System ID:
AA00023131:00001

Full Text






September 1942 ET-200

United States Department of Agriculture
Agricultural Research Acdministration
Bureau of Entomology and Plant Quarantine


HAID-OPERATED EQUIPMENT FOR FRECISICN DUSTING

By C. H. Batchelder and A. V. Ccsenza, Division of Cereal and For-
age Insect Investigations



Dust guns with small discharge tubes are useful for applying
insecticides to restricted parts of a plant with precision, econ-
omy, and freedom of the operator from the annoyance of a dust
cloud.

The equipment shown in operation in figure 1 consists of two
parts, (1) a dust gun, which holds a supply of insecticide ar.d
provides a means of directing the dust discharge, and (2) a pcrt-
able air pump. The parts may be assembled from readily available
or salvaged materials at comparatively low cost.

The Dust Gun

The dust gun (figure 2) was constructed from these parts:
A mason-type quart jar, one 12-inch length of 5/16-inch copper or
steel tubing bent into a "U," one 10-inch length of 1/4-inch tub-
ing, one 5/16-inch, straight, union, compression coupling with one
sleeve and two nuts, one quarter-inch right-angle ccrmpression ccup-
ling with one sleeve and two nuts, a piece of strap iron 3/4 by 10
inches, and a 4-inch length of garden hose. Metal tubing and ccm-
compression couplings are used in fuel lines of oil stoves and
automobiles. The strap iron is bored to receive the couplings,
bent to form a grip support, and fastened over a gasket to the jar
top.

A Portable Air Fump

Details of a portable air pump are shown in figure 3. First
mount an automobile tire pump on a wooden staff (3/4 by 3/4 by 42
inches) by means of thin sheet-iron straps and an eyebolt. Fasten
the end of the tire-pump plunger rod in a foot brace made of strap
iron or of stcut wood. If the rod is not threaded and a 1- by 3/4-
by 8-inch piece of hardwood is used for the foot brace, bore a hcle
through the wocd, pass the rod through it, peen over the end of the
rod sufficiently to hold a washer in place, and tack a piece of








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metal over the end of the rod. Three eyescrews hold a 1/8- to
3/8-inch guide rod, 31 inches long, bent at right angles just
beneath the staff handle and fastened to the foot brace by the same
means used for the plunger rod. Connect the tire pump and dust
gun with a 30-inch length of rubber tubing (1/4 inch inside diameter),
and the outfit is ready for use. Ordinary tire-pump tubing is not
large enough in diameter to operate the dust gun.

Operating the Equipment

Air compression is developed by pushing the pump toward the
ground, and the plunger rod is held by the foot brace during the
back stroke. Both guide rod and staff handles are grasped in carry-
ing the equipment. It is necessary to shake the dust gun occasion-
ally in order to keep the dust in a "fluffed" condition.











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Figure 1.-Equipment in operation. The operator
stands with one foot on the foot brace while
pumping air through the dust gun.










































Figure 2.-Dust gun, showing tube compression
couplings, gaskets, U-shaped air-intake tube,
dust supply, discharge tube, and parts forming
the grip.























OR















Figure 3.-Details of the air punp: (a) Adjustable staff
handle, (b) medium-stied tire pump, (c) sheet-netal clamp,
(d) pump plunger rod, () plunger-rod eyebolt, (f) foot
brace, (g) guide rod, (h) air hose, and (i) dust gun. A
simpler foot brace may be made of wood, as described on
page 1.






UNITED STATES DEPARTMENT OF AGRICULTURE
OFFICE OF THE SECRETARY
WASHINGTON, D. C.

OFFICIAL BUSINESS


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PENALTY FOR PRIVATE USE TO' .
PAYMENT OF POSTAGE, $300.


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