US2446494A

US2446494A - Snow fence machine

Info

Publication number: US2446494A
Application number: US581673A
Authority: US
Inventors: Joseph D Smith
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-03-08
Filing date: 1945-03-08
Publication date: 1948-08-03
Anticipated expiration: 1965-08-03

Description

J. D. SMITH 2,446,494

SNOW FENCE MACHINE Aug. 3, 1948.

Filed March 8, 1945 5 Sheets-Sheet l J. D. SMITH sNow FENCE MACHINE Aug. 3, 1948.

3 Sheets-Sheet 2 Filed March 8, 1945 p, ZO

Irn/entor Joseph D. Smfh O al l0 Aug- 3, 1948- J. D. sMrrH 2,446,494

SNOW FENCE MACHINE Filed March 8, 1945 5 Shee'ts-Sheet 3 |570 14 llwm 'I L I Ilm/en tor. Jose/Jh D. 5mi/71.

ed with the main drive shaft 24 has mounted thereon between the crosshead guides a cam disc 39 formed with a face cam groove 40 in one side thereof. This cam groove is formed with a short concentric portion 4l which is connected by an eccentric portion 42 with a long concentric portion 43 and a second short eccentric portion 44 of said groove connects with the short concentric portion forming a somewhat heart-shaped groove.

Mounted on the spaced-apart

cross bars

45 and 46 of th'e crosshead 35 are

rollers

41 and 48 which engage the cam groove so that as the roller 41 operates in the short concentric groove 4l, the

nection 69 with a lever 19 pivotally mounted on the frame. The lever` 10 is periodically operated by a cam 1I mounted on the shaft 59 or other shaft suitably connected so that at the desired inroller 4B follows the long concentric groove 43 andl`` while the roller 41 follows the long eccentric portion 42 the other roller 48 follows the short eccen- Y tric portion 44.

The thrust of th'e cam is thus tween the spaced-apart rollers of the crosshead which is operated first with a comparatively long movement in one direction followed by a stationary period while the

rollers

41 and 48 travel in the concentric-portions, then the crosshead is moved in the opposite direction.

This intermittent reciprocatingr movement of the crosshead operates the top bar 33, the end lever 30, the bottom bar 32, lever 29, shaft 28 and the quadrant 21 to rotate the pinion 26 and the train of fork gears, thereby turning the forks a definite predetermined number of turns to twist the wires l2 tightly around the slat which has been first placed transversely between the wires and then moved out of the forks. l

The means for moving the slats out of the forks is particularly shown in Figure 9 in whicha bar` 49 extends transversely of. the machine below the fork members 1 and has guide surfaces extending upwardly between the several forks to guide the slats centrally into said forks when propelled by the spur wheels 20. y

Fingers 50 extend upwardly from the bar 49 between the fork members to engagethe forward edge of the slat placed in the forks and the said bar is operated to push the slat edgeways out of the forks and into close engagement with the previously twisted wires I2.

Secured to each end of the bar 49 is a longitudinal bar 5l provided on the lower edge with rack teeth 52 which mesh with pinions 53 on a shaft 54 journalled transversely of the main frame.

A quadrant 55 mounted on theV frame meshes with one of the pinions 53. A train of

gears

56, 51, 5B drivenfrom a shaft 59 operate a crank G on the shaft of the gear 58 and said lever has a crank pin 6i at its outer end connected to a link bar 82 which in turn is connected to the arm 63 of the quadrant.

The pinion shaft 54 has mounted th'ereon a crank 64 which operates a rod 65 connected with the hinged SlatV feed frame I6 to raise and lower, the frame in synchronism with the operation .of the bar 49 for moving the slats from the forks.

This slat controlling mechanism and the spacing and trimming mechanism is not a part of the present invention and is not described in complete. detail herein.

An important feature in the present invention is to make provision for definitely locating the position of the wire twisting forks so that they will come to rest at the end of each operation of the cam-operated mechanism described with their sides in a vertical position so that the slats will enter same without obstruction. In order to accomplish this result and to enable accurate adjustmentthe hollow fork shaft 6 on which ythe distributed te! stant the cam will engage the lever and operate .theclutch to stop the rotation of the driving gear 25 and Yconsequently all the rest of the train.

" The lever 10 is provided with a suitable means foi-adjusting the contact with the cam 1| and is vhere illustrated as a leaf spring 12 adjusted by a set screw 13.

A machine as herein described is extremely accurate in its operation and the mechanism is rugged and will effectively withstand the strenuous operating motions and produces a uniformly secure fence in which the slats will be firmly held from displacement in the rugged service which it is called upon togive.

What I claim as my invention is:

1. In :a machine for making snow fences, th combination with a frame, a plurality of rotatable parallel wire twisting members mounted on said frame and geared to rotate in unison, means for` feeding paired wires to each o-f said twisters, of a flanged bushing rotatably mounted on one of said wire twisting members, means for imparting rotative movement to said flanged bushing, a flanged member slidably and non-rotatably mounted on said wire twisting member adapted to engage the flange of the aforesaid bushing to drive the wire twisting member, and means for periodically operating said slidable clutch member to engage and disengage the flanged bushing.

2. In a machine for making snow fences, the combination with a frame, a plurality of rotatable parallel wire twisting members mounted on said frame and geared to rotate in unison, means for feeding paired wires to each of said twisters, of a anged bushing rotatably mounted relative to one of said wire twisting members, means for imparting rotative movement to said flanged bushing, a flanged bushing slidably and non-rotattvely mounted on said wire twisting member and adapted to engage the flange of the aforesaid .bushing to convey movement from said bushing to said wire twisting member, a lever operating to'move said slidable member into and out of engagement with said flanged bushing, and camoperated means for operating said clutch lever.

3. In a machine for making snow'iences, the combination with a frame, a plurality of rotatable parallel wire Itwisting members mounted on said frame and geared to rotate in unison, means for feeding paired wires to each of said twisters, of a flanged bushing rotataby mounted relative to one of said wire twisting members, means for imtpartingrotative movement to said flanged bushing, a flanged bushing slidably and non-'rotatively mounted on said wire twisting member and adapted to engage the flange of the aforesaid bushing to convey -movement from said bushing to said lwire twisting member, a lever operating to move saidslidable member into 'and out of engagement with said. flanged bushing, toggle means for operating said lever, a lever connected with said toggle means, an adjustable contact member mounted on said lever, and a cam arranged to engage said adjustable contact.

4. In a machine for making snow fences, the combination with a frame, a plurality of rotatable parallel wire twisting members mounted on said frame and geared to rotate in unison and means for feeding paired wires to each of said twisters, of an oscillatable member for operating said .twisters to rotate rst in one direction and then in reverse, a horizontal bar connected with said oscillatable member, a lever connected with said bar, a rod connected with the top of said lever, a crosshead mounted to slide horizontally and connected with said rod and having paired rollers, and a disc cam having a groove engaging said crosshead rollers and operating same with a reciprocation motion.

5. In a machine for making snow fences, the combination with a frame, a plurality of rotatable parallel wire twisting members mounted on said frame and geared to rotate in unison and means for feeding paired wires to each of said twisters, of an oscillatable member for operating said twisters to rotate first in one direction and then in reverse, a horizontally slidable crosshead operatively connected with said oscillatable member and having spaced-apart rollers extending from one side thereof, a cam disc having a cam groove formed with concentric curves connected by eccentric curves engaging said paired rollers and imparting on rotation reciprocating movement to said crosshead and consequent reversing rotation to said wire twisters.

6. In a machine for making snow fences, the combination with a frame, a plurality of rotatable parallel wire twisting members mounted on said frame and geared to rotate in unison and means for feeding paired wires to each of said twisters of an oscillatable member for operating said .twisters to rotate first -in one direction and then in reverse, a horizontally slidable crosshead operatively connected with said oscillatable member and having spaced-apart rollers extending from one side thereof, -a cam disc rotatably mounted adjacent said crosshead having a groove to engage said rollers formed with a short concentric portion and long and sho-rt eccentric portions connecting said concentric portions and imparting reciprocating movement to said crosshead.

JOSEPH D. SMITH.

REFERENCIES CITED The following references are of record in the Eile of this patent:

UNITED STATES PATENTS Number Name Date l532,405 Tiffany Jan. 8, 1895 1,663,786 Wilson Mar. 27, 1929 1,846,685 Mattson Feb. 23, 1932 2,255,655 Denning Sept. 9, 1941