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". i* ptember i'. 1
United Si. tes L ,tment of Agricultur
Bureau of ELii :. 1. nd Plant C..:a Fantine
A POVIE ..-U '.!_;. 4 II,-. ': I, .",., i'l .! *
By F. W- Carlson ,..i !. A. Yotheri,
Division of F.'.: Insect In'.'cstigations
Several kinds of sifti:., machi. -. for separate subter-
a1iCai. insects from soil hav ,. developed du"'*..: the last few
y,'ars Donohoe (1) developed a foot-.',rated device for recovering
the larvae of the raisin moth from the soil (Thmini-ll and Stone (2i
developed two sifters for use in exm.'1n.Ii' soil to deteCni.e the
effect of chemicals on wireworms ;ii 1 also to determine the wireworm
Do'[ilntioi, in a given area "e of these was hand-operated and one
u-,.'..r-dAriven. A machine by Yoihers (3)was a hand-. ,.rated sifte_
for determining codli. ot. larval r..iulations in the soil A
.*: i-aperated machine i.'. '.e d "hirck (4) was used in wireworm
studies. Another hy Morrill b) wtas a motor-driven sifter .lo'.'d
for determining wireworm i. '- at ions in tobacco field. : A mobile
motor-driven soil sifter by Lane and Schi"'k (6) was employed in
The hand-operated sif TJ-r discussed I':., the junior writer (3j
was suitable for its purpose of -,:paratinq codliir, moth larv.'-- in
their over-wintering. cocoons from soil and debris, but in order
to facilitatee the han.11;..y, of- much larger quantities and n'iWi-rs
of soil samples this device was transformed into a gasoline-powered
Tachine, as shown and discus-, here. The main features of this
device are its low cost of -'-. .truction and operatic', ;-"d its -.e
of handling and operatic,
A frame of 2" x 4" lumber, 5 inches wide and 6 feet lo:'-
(f 1, J), was built o L he horsesrses (G). The 2 by 4's were
no-.ciied to fit on top of the awhorses to prevent 0sl _.- 0' .
holt ]i,' h through the center o each sawhorse fastened the fra.-
to it and yet made it I.'.,y to I-,arate th i. A 1" x 6" frame (I)
-.'as built on three sides of he frame (J) as a 'ide for the
sifting box (E).
*This power-driven sifter and the h,;t!,-..perated one from
which it originated (see reference o. 3) .'.ere developed at
akiima, Wash.. laborato,- in the coursr- of investigati,'- of
codling moth control.
The sifting box was made with a bottom of 3/16" mesh hard-
ware cloth. The rollers (fig. 1, F) are of round fir, 21" in
diameter and 4" long, with a 1/2" hole through the center for a
bolt. A piece of 3/4" pipe and washers keep the rollers apart.
The rollers turn on a smooth runway. A 2" x 4" cross piece (fig.
3, 4) '.'.as set into the .-:nd of this box just ahead of the front
rollers. To this a connecting rod (fig. 1, D) (fig. 3, 3) was
attached, which was fitted on the end with a U-strap (fig. 3, 5)
and a bolt (fig. 3, 6) fitted with a grease cup (fig. 3, 7). As
there is a great deal of wear and considerable strain here, a i"
bolt should be used as shown in figure 3, 6. The connecting rod
(fig. 1, D) (fig. 3, 3) is a good piece of full 1" x 2" straight-
grain, oak with a 1/4" bolt through each end. The shaft is a 3/4"
steel rod with a cross bar (fig. 1, C) (fig. 3, 8 and 9) on one
end, 1/2" x 1-1/2", with a double set of holes for changing the
length of the stroke. The boxing are fitted with grease cups to
insure adequate lubrication. A bolt, 1/2" x 26", running across
from one side of the main frame to the other under the drive shaft
holds the frame together.
To operate this sifter a utility gasoline motor (fig. 1, A)
was used, mounted on an iron frame as described by Dean (7). To
this frame was bolted the extension-shaft frame (fig. 1, M), which
supports the shaft, a 1-1/2" V-pulley, and a bearing. The shaft
and V-pulley are connected to the engine shaft by a universal joint
(fig. 3, 1). A 10" pulley mounted on the sifter is operated by a
V-belt, 1/2" x 48", over the 1-1/2" pulley on the drive shaft.
The motor frame rests on two cross pieces (fig. 1, K),
attached to and extending across from one beam (L) to the other,
and is attached to the sifting machine frame with a bolt (B). By
removing this one bolt the motor and its frame can be separated
from the sifting machine. The beams (L) are also bolted to the
legs of the horses to insure rigidity of the two machines.
A flexible cable shown in Dean's paper (7) was removed, and
a short piece of 1/2" shafting was made square on one end and
inserted in its plnc.t (fig. 3, 1 and 2). This shaft is long enough
to allow attachment of a flexible cable if desired. The steel
platform (fig. 1, H) is for attachment of a paint-gum compressor
for spraying purposes in the field where electric power is inac-
cessible. The compressor is operated off the projected shaft
above it. If desired, this sifter can still be used as a hand
sifter by simply removing the one bolt B, thus detaching the motor
and its frame from the sifting machine.
The general appearance of this machine is shown in figure 2,
which is from a somewhat different angle from that shown in fig-
1i Donoho A .'e Sifter for Ex.rititlon of .-Ail in
Sindicd o I scots. it ; .^ es D'rj,-!.1r'1,hc,,t of .*, .icul-
turo. r,,c of a. doilo Plant Qu-. rantine, C 7-1
Febi .. -, i ..
3. Yeth 11,
E. V!",i 1 o0 Sifters for ubterranean
States DP, .rtmen+ of Agricul ure, Bureau
1 ;nd Plant 7 ran tine. E:T-49 May I,."'
S A in' .1 rated .-nil-Sift I. vice.
S:; ,,t o -,ri cuI ture Bureau of Ento-
F PIant .rantie, ET-134. October 19.T
T' ...ett I -
5. Morr i
of .. tool
6 Lane, .
mol :. 2d
7 Deal ..
OEt e .
-. i1 i! A -'-1 Si after for Subterranean
SJo~~.* 'on E!.t 21 (6) 934- 7-.
A Shii' ut C:"-'ct .f-i1 Sifter or
"1S r' 's >'T ''rtment of culturetur, ',"cau
Plat. -rantin, 7T-148. June i97'.
F, H A "-))ile Power Soi Sifter,
o* -'otculture, Bureau of .>to-
rantin, -70 JJa.u-ary 1J,.
"- "ve ;' .cr or Making r, '3ions and
i' Fied. Un ted States C-a' ',*,en of
an oP to -o-' and Plant rantine,
3 pieces 2 ....
2 pieces 2 x 5
1 piece I" x6
1 piece I x
1 piece 1 x 2
1 piece C x 2
2 pieces 2" x
4 pieces 2-1/2"
.r4fS 2surfae d( 4 sides) FPic
I (o (n osa pine) Frame
'" Screen box
Pd st n-P PS4S Screen box
oak ~ ''*F tman rc,
ir B,-"1..-. blocks
Hardware oo.h. 24" :n C
2 rods 1/2" x .-"
2 rods i, x :
2 pieces 3/4" pi. -.-1/4" 1-..
2 bolts 3/8" x 5-1/2", machine
2 bolts 3/8" x 6-1/2", machine
2 bolts 3/8" x 4-1/2", machine
5 bolts 3/8" x 2-1/2", machine
2 bolts 3/8" x 1", machine
2 bolts 1/4" x 2-1/2", machine
1 piece shafting, 3/4" x 15", with crank drilled with holes for
Length of shaker strokes 1-1/2" to 4"
2 collars, 3/4"
2 boxing, 3/4", complete
1 U with bolt and grease cup
1 boxing, 1/2", complete
1 angle iron brace for motor
1 piece shafting, 1/2" x 10"
1 pulley, 1-1/2"
1 collar, 1/2"
1 pulley, 10"
1 V-belt, 1/2" x 48"
Total cost, materials, less motor and motor frame, about $11.
A POWER-DRIVEN SOIL SIFTING MACHINE.
Figure l.-Power-driven soil-sifting machine. A, Utility gasoline
motor; B, bolt for attaching the motor frame to the sifter frame;
C, adjustable crank with 1-1/2" to 4/" stroke; D, hardwood connect-
ing rod; E, shaker screen and frame; F, rollers; G, horses; H,
platform for spray-gun compressor (when used for spraying); I,
guide frame for sifter carriage; J, stationary base for sifter;
K, cross pieces under engine frame; L, leg rests and motor support;
M, extension-shaft frame.
Digitized by the Internet Archive
in 2012 with funding from
University of Florida, George A. Smathers Libraries with support from LYRASIS and the Sloan Foundation
Figure 2.-Soil-sifting machine from a somewhat
different angle from that shown in figure 1.
I-THE UNIVERSAL JOINT WITH FLEXIBLE WRE GABLE REMOVED.
2-SQUARE SOCKET FOR DRIVE SHAFT.
3- CONNECTING ROD.
4-CROSS PIECE ON SIFTER.
5- U- STRAP
8-CRANK ON SHAFT WITH HOLES FOR ADJUSTING STROKE.
9- SIDE VIEW OF CRANK.
I I I
8000 -0 KEYo HOLE
00: <-'0 0
i WASHER WASHER
16 rI- 6
-: : -'... ,._ .', \\\\\ ",iJ
, U IrHL
SCALE I" TO 1"
CRANK ASSEMBLY a UNIVERSAL OF SIFTING MACHINE.
UNIVERSITY OF FLORIDA
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3 1262 09082 5042
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