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Патент USA US2408459

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Oct. '1, I946.
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w, H, THQMA5QN '
DRIVE MECHANISM
Filed July- 15, 1944
2,408,456
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‘Oct. 1, 1946.
2,408,456
w. H. THOMAS‘ON
DRIVE MECHANISM
Filed July 15, 1944
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Patented Oct. 1, 1946
2,408,456
UNITED STATES PATENT OFFICE
2,408,456
DRIVE MECHANISM
William H. Thomason, Margret, Ga.
Application July 15, 1944, Serial No. 545,081
1 Claim. (Cl. 74-49)
1
2
.The present invention relates to new and useful
improvements in drive mechanisms where it is
l I and is provided with a roller l4 freely mounted
on the pin while a pin I5 is eccentrically mounted
on the gear [2 and is likewise provided with a
roller I6 freely mounted on the pin I 5.
A rod I1 is reciprocably mounted in a guide I8
at one side of the casing 5 and on the inner end
of the rod is formed a head I9 slidably supported
on the bottom of the casing, the head being of
desired to convert rotary to reciprocating motion
such as in mowers and various types of shears,
as well as for use in combines, binders and other
machinery and the invention has for its primary
object to provide a drive mechanism of this
character of simple and practical construction,
elongated construction and having its ends curved
which is efficient and reliable in use, relatively
inexpensive to manufacture and otherwise well 10 outwardly as shown at 20 and 2| to provide con
tacting edges for the rollers l4 and I6 of the gears
adapted for the purposes for which the same is
II and I2, respectively, during the rotation of
intended.
the gears, each of the rollers being timed to en
Other objects and advantages reside in the de
gage an adjacent edge of the head to slide or
tails of construction and operation as more fully
hereinafter described and claimed, reference be 15 throw the head in opposite directions whereby a
reciprocating movement of the rod l‘! is produced.
ing had to the accompanying drawings forming
It will be apparent than any suitable cutter or
part hereof, wherein like numerals refer to like
other mechanism may be attached to the outer
parts throughout, and in which:
end of the rod I‘! where a reciprocating action
Figure 1 is a side elevational view of the eas
20 thereof is desired.
ing in which the mechanism is mounted.
The casing 5 may be ?lled or supplied with a
Figure 2 is a sectional view taken substantially
suitable lubricant to reduce friction and facilitate
on the line 2—2 of Figure 1.
operation of the device.
Figure 3 is a longitudinal sectional view
It is believed that the details of construction
through the casing.
Figure 4 is a sectional view taken substantially 25 and manner of use of the device will be readily
understood from the foregoing without further
on the line 4-4 of Figure 3, and
detailed explanation.
'
Figure 5 is a fragmentary perspective view of
Having thus described the invention, what I
the driven head on the reciprocating member.
claim is:
Referring now to the drawings in detail where
Means for converting rotary into reciprocating
in for the purpose of illustration I have disclosed 30
motion and comprising a pair of shafts, means
a preferred embodiment of the invention, the nu
for driving one of said shafts, interengaged gears
meral 5 designates a casing having bosses B on
secured to the shafts for rotation in opposite die
its opposite sides in which shafts ‘I and 8 are
journaled.
rections, a slidably supported member including
a laterally projecting head and means eccentri
To one end of the shaft 1 is secured a pulley
cally carried by the gears and engageable with
9 adapted to be driven by a belt or other drive
opposite edges of the head to move the latter in
means ID.
opposite directions, said member being slidable in
A spur gear I l is secured to the shaft 1 within
a ?xed path, said means last-mentioned compris-'
the casing engaging a similar gear l2 also posi
ing a pair of rollers revolved by said gears into
tioned in the casing and secured to the shaft 8,
engagement with said head alternately and each
the gear ll being driven in a counter-clockwise
disengaging said head when the other is engaged
» direction while the gear I2 is driven in a clock
wise direction as shown in Figure 3 of the draw
ings.
therewith.
.
A pin I3 is mounted eccentrically on the gear 45
WILLIAM H. THOMASON.
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