US1030420A - Stacker. - Google Patents

Description

R. F. MEYERS.

STAGKER.

APBLIOATION FILED JUNE 20, 1910.

Patented June 25, 1912.

3 SHEETS-SHEET 1.

VENTOR p1 ZZZdak/Weyers (It/ 0mg? i WITNESSES COLUMBIA PLANcnnImn CO.,WASHINGTON. n. c.

R. F. MEYERS.

STAOKER.

APPLICATION FILED JUNE 20, 1910.

I [NVENTOR WITNESSES M yers' Attarmj KQW,

COLUMBIA PLANOGRAPH 410., WASHINGTON. D. c.

R. F. MEYERS.

STAGKER.

, APPLICATION FILED JUNE 20, 1910. I 1,030,420. V Patented June 25, 1912.

3 SHEETS-SHEET 3.

E31 x og;

x '0 Q A N E 4W6 a mjw' 8% MWMW,

RODDY F. MEYERS, OF TROY, ILLINOIS.

STACKER.

LOSOAZO.

Specification of Letters Patent.

Patented June 25, 1912.

Application filed June 20, 1910. Serial No. 568,014.

, To all whom it may concern Be it known that I, RoDDY F. MEYERS, a citizen of the United States, residing at Troy, in the county of lVill and State of Illinois, have invented certain new and use ful Improvements in Stackers, of which the following is a specification.

My invention relates to stackers and particularly to straw stackers for use in con-- nection with threshing machines.

An important object of this invention is to provide a stacker comprising telescoping tubes, with automatic means for reciproeating one of the tubes with reference to the other to distribute the straw uniformly along the crest of the stack.

Another object of my invention is to provide means for reciprocating one of the telescoping tubes with reference to the other which will not interfere with or be rendered inoperative by raising or lowering the tele scoping tubes.

A further object of this invention is to provide a stacker of the character set forth which will be simple in construction, automatic in its action and not liable to get out of order.

My invention consists generally in the provision of telescoping conveying tubes, in combination with automatic means for operating and controlling the same.

The various novel features of construction and arrangement which I employ are described in detail in the following specification and particularly defined in the appended claims.

In the accompanying drawings, forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, Figure 1 is a side elevation of the stacker. Fig. 2 is a cross-sectional view taken on line 22 of Fig. 1 and looking in the direction of the arrows. Fig. 3 is a top plan view of the construction shown in Fig. 1, parts thereof being broken away. Fig. 4 is a detail sectional view of the driving shaft, showing associated elements in elevation. Fig. 5 is a fragmentary vertical section taken on line 55 of Fig. 1, and looking in the direction of the arrow. Fig. 6 is a rear end View of the stacker. Fig. 7 is a detail perspective view of a lever connected with the clutch-head 84, and Fig. 8 is a side elevation of the main U-shaped bracket.

In the drawings wherein is illustrated a preferred embodiment of my invent-ion, the numeral 1 designates the stacker, comprising telescoping tubes 2 and 3. The tube 2 is fitted within tube 3 as shown, and tube 3 which is hereinafter termed a discharge tube is provided with a curved downwardly extending neck 4. The tube 2 is bent as shown at 5 to form a knee which is suitably secured to a flexible tubular section 6. This flexible tubular section is in communication with a tube 6, which in turn communicates with a threshing machine to receive therefrom material, as is well known in the art.

The threshing machine is provided with a suitable blower mechanism for forcing material outwardly through the tube 6.

The stacker 1 further comprises a rigidly mounted annular base 7, through which the tube 6 passes as shown in Fig. 6. Disposed upon the upper surface of base 7, preferably at diametrically opposite points thereof are arranged brackets 8, which are rigidly secured to the stationary base 7 by means of bolts 9. Each of the brackets 8 is provided upon its outer side with spaced superposed rollers 10, which receive therebetween an annular shifting base 11, which has an outer downwardly extending annular flange 12. The shifting base 11 also comprises an inner annular strip 13, which is arranged concentrically with the outer portion of said base 11. The annular strip 13 forms with the outer portion of base 11 an annular opening 14, within which the brackets 8 are arranged as shown. The strip 13 is rigidly connected to the outer portion of base 11 by means of inverted U-shaped brackets 15, which are preferably disposed at diametrically opposite points.

As shown in Fig. 5, the lower end of the tube section 6 is suitably secured to the annular section 13, as at 16. By reason of the construction above described it will be obvious that the shiftingbase 11 is rotatably mounted upon the stationary base 7, and positively held in its normal horizontal plane by means of the rollers 10. Suitable rotation in either direction of the shifting base 11, is effected by means of a pinion 17, which meshes with teeth 18 formed as shown upon the periphery of said shifting base. The pinion 17 is rigidly mounted upon a vertical shaft 19 which is journaled through a suitable bearing (not shown) and actuated by any desired means.

The shifting base 11 is provided at one side thereof with a pair of spaced curved uprights 20, which have their lower ends bolted as shown at 21, or otherwise suitably secured to said base 11. Upon the upper ends of the uprights 20, is pivotally mounted, as shown at 22, a main inverted U- shaped bracket 23, which comprises vertical spaced sides 24 and 25. This inverted U-shaped bracket straddles the tube 2, which is supported by a curved section 26, which connects the vertical sides 24 and 25, and which in turn is braced by a second curved section 27. The inverted U-shaped bracket 23 is provided adjacent its vertical side 25 with a vertical extension 28. The U-shaped bracket 23 is provided near its center with spaced vertical extensions 29, which are in transverse alinement with the extension 28. An inverted U-shaped bracket 30 is disposed between and rigidly connected with extensions 29 in any suitable manner and is preferably integral therewith as shown. This inverted U-shaped bracket is provided at its center with a vertical extension 31. A transverse driven shaft 32 is rotatably mounted within the extensions 29 and the bracket 30 as shown, and any suitable means may be employed to prevent the longitudinal displacement of said driven shaft. This driven shaft is also journaled through the upper end of the extension 28 as shown. Angle brackets 33 are loosely mounted upon shaft 32, and these brackets are disposed adjacent to and upon the outer sides of extensions 29. As clearly shown in Fig. 3 the angle brackets 33 are provided with for wardly extending ends 34, between which is clamped one end of a gib or rail 35. The ends 34 are rigidly connected with rail 35, by means of bolts 36. This gib or rail is provided near its center with an upstanding brace or strut 36, which constitutes a portion of a truss-work for supporting said rail. A rod 37 is suitably connected with the extension 31 and passes through a suitable opening in the upper end of the brace or strut, 36, to extend forwardly for suitable engagement as shown at 38, with the free end of rail 35. A rod 39 is diagonally disposed as shown and connects the lower portion of arm 36 with the extension 31 as clearly shown in Fig. 1.

By the construction above described, it is obvious that the gib or rail 35 may be swung in a vertical plane by oscillating the main U-shaped bracket 23. Means are provided for oscillating this main U-shaped bracket,

comprising a pair of rearwardly extending curved brackets 40, which are rigidly mounted upon the shifting base 11, and ar ranged opposite the uprights 20. The brackets 40 have journaled through their upper ends a winch or hoist, 42, upon which is rigidly secured a spool or drum 43. The brackets 40 are shown as being braced by means of diagonally disposed rods 44, which are connected with said brackets 40 and mounted upon the base 11. The shaft 42 has one of itsendsvprovided with a worm gear 45, which is fixedly mounted thereon and disposed to mesh with a small worm 46, which is formed upon a shaft 47. This shaft 47 is journaled through a suitable bracket 48, which is fixedly secured to one of the brackets 40, as shown. The shaft 47 is provided with a hand wheel 49, by means of which it may be rotated. A housing 50 is pivotally connected as shown at 51 with the extension, 31, and within this housing 50 is rotatably mounted a pulley 52. A cable 53 having one end secured to thespool or drum 43, is trained about pulley 52 and extends rearwardly to be suitably secured to a bracket 54, which is loosely mounted upon the shaft 42. By means of this con struction, it will be obvious that when the spool or drum 43 is rotated in either direction, the main U-shaped bracket 23 will be actuated to swing rail 35 upwardly or downwardly as desired. A transversely disposed beam 55, is arranged upon the angle brackets 33 as shown, and rigidly secured thereto by means of suitable bolts 56. Upon one end of this beam is pivotally mounted as shown at 57, a bell-crank lever 58, comprising long and short arms 59 and 60 respectively. A retractile coil spring 61 has one end thereof connected as shown at 62 to the free end of the long arm 59, and the opposite end suitably securedto the free end of the beam 55, as shown at 63. An actuating lever 64 has its rear end enlarged as shown at 65 and provided with a slot 65 to slidably receive a bolt 65 which is fix edly mounted upon the arm 59. The lever 64 is slidably mounted within a bracket 65, and extends forwardly to a point substantially midway of rail 35. The portion 66 of the lever 64 is parallel with the rail 35 and provided with inwardly extending spaced lugs 67 and 68. The lug 68 is longitudinally adjustably mounted upon the rod 64, and may be clamped in a desired position upon'said rod by means of a clamping bolt 68, to regulate the distance of forward travel of the tube 3. p

The discharge tube 3 is provided near its center and forward end respectively, with rings 69 and 70, which are secured thereto by any suitable means. The center ring 69 has brackets 71, which are arranged upon opposite sides of the rail 35, and between which is rotatably mounted a roller 73, which is arranged to run upon the rail 35.

The forward ring 70. has rigidly secured thereto in any. suitable manner, spaced verticalibrackets 74, which like brackets 71, are disposed upon opposite sides of the rail 35. The brackets 74zsupport roller 75 which is adapted torun alongv rail .35 as shown. From the above description it will be obvious that the outer or discharge tube 3 is so supported that it;1nay be moved longitudinally to telescope with tube 2. which I preferably employ to effect such a longitudinal movement of tube 2, willv now be described.

As shown in Figs. 1 and 3, the rail has a wheel or roller 76, rotatably mounted upon one side thereof and near its center, which is adapted to receive thereabout an endless cable 78. This cable is wound about the spool or drum 43 carried by shaft 32. The shaft is provided with spaced bevelgears 80 and 81, which are loosely mounted upon said shaft and accordingly free to rotate thereon, but said gears are not capable of moving longitudinally upon the shaft 32. These bevel-gears are oppositely faced, and provided respectively with clutch members 82 and 83, which are adapted for alternate engagement with a clutch-head 84, disposed between said gears and movable upon a feather or spline upon the shaft 32. It is obvious that when the clutch head 84 is moved in either direction sufficiently, a se standing sides provided with suitable open ings through which the shaft 32 is journaled as shown. The horizontal portion of the U-shaped bracket 85 is provided centrally thereof with a circular opening 86, within which is rotatably mounted a cylindrical portion 87 of a hollow driving shaft 88. The cylindrical portion 87 has formed thereon an enlarged head 89, which prevents the downward displacement of shaft 88, and this enlarged head has fixedly secured thereto a bevel-gear 90, which as shown, is in permanent mesh with the bevelgears 80 and 81. The shaft 88 is hollow as above stated and is square in-cross-section for the greater portion of its length as shown. It is pro vid'ed with an axial square opening 91, adapted to slidably receive a shaft 92, which is also square in cross-section. It will be seen that the shaft 92 is free to telescope within the shaft 88, while held against rotation within the same. The shaft 92 has a bevel-gear 93 rigidly mounted thereon near its lower end. The shaft 92 has its lower end formed cylindrical and provided with an annular groove 94 for the reception of a transverse pin 94. The cylindrical end of the shaft 92 is journaled within a sleeve 96, which is pivotally mounted upon a shaft 98. The sleeve 96 is disposed within the upper 1 The means forked end of a support 97, the shaft 98 begear 99 fixedly mounted thereon as shown.

Thegear 99 may be formed with a sleeve 100, which engages sleeve 96 and prevents the longitudinal movement of shaft 98 in one direction. A ring 101 is mounted fast upon shaft 98 and prevents its outward displacement by engagement with sleeve 96. A bevel-gear 102 is keyed upon shaft 98 as shown, and provided with a sleeve 103, whereby the said bevel gear may be moved longitudinally of shaft 98 to engage or disengage bevelgear 93. It is to be understood that any suitable form of lever (not shown) may be employed to cooperate with sleeve 103 to move gear 102 longitudinally.

The bevel-gear 99 is in constant mesh with bevel gear teeth 104, formed upon the upper edge of an annular driving gear 105. This driving gear 105 is provided with a circular recess 106, which is adapted to loosely re ceive the shifting base 11. The driving gear 105 is rotatably supported upon base 11 and is provided upon its lower side with gear teeth 107, which mesh with a gear 109, fixedly mounted upon a horizontal shaft 110, which is journaled through a suitable bracket 111. This horizontal shaft is further provided with a pulley 112, which is fast thereon, and which may be rotated by means of a belt, driven by a suitable form of motor (not shown).

As shown in Fig. 3, the clutclrhead 84 is provided with a peripheral groove 113, within which is disposed the free end of the short arm 60 of bell-crank lever 58' B means of this construction clutch-head 84 may be moved longitudinally on shaft 32 by means of the bell-crank lever 58. A connecting rod 114 is pivoted at 115 to the short arm 60, and has its opposite end pivotally connected as shown at 115, to an L-shaped hand lever 116. This lever is pivotally conneotedas shown at 117 to a bracket 118, fixedly secured to one side of the U-shaped bracket 30. The U-shaped bracket 30 has fixedly secured thereto as shown at 119, in superposed relation to bracket 118 an arm 120, which is, provided with a longitudinal opening 121 for the reception of lever 116. A recess 122 is formed in one wall of slot 121 and is adapted to receive and hold the lever 116. This lever 116 may be forced into recess 122, whereby clutch head 84 will be free from engagement wit-h either of gears 80 and 81, as illustrated in Fig. 3. hen lever 116 is removed from recess 122 it is free to be moved back and forth within the slot 121.

In the operation of the stacker, the annular gear 105 is continuously rotated in one direction, receiving its motion from shaft 110. The tubes 2 and 3 are adjusted to assume a desired position. The rotation of the annular gear 105 causes the shaft 98 to be continuously rotated, through the medium of the bevel gear 99. The bevel gear 102 may then be moved into engagement with the bevel gear 93, whereby the telescoping shafts 88 and 92 will be rotated. This rotation of the shafts 88 and 92 is imparted to the bevel gear 90, which in turn rotates the bevel gears and 83 in opposite sume that the same is rotated counter clockwise as indicated by the arrow. The spool or drum 13 being rigidly mounted on the shaft 32 is likewise rotated counter clockwise and the endless cable 78 made to travel thereon and about the pulley 76. The lower strand of the endless cable 78 is suitably connected or tied to an ear 7 7 a formed upon one of the brackets 71, whereby this move ment of cable 78 will cause the discharge tube 3 to travel longitudinally in a forward direction. The forward movement of tube 3 is stopped when one side of the bracket 71 engages.the projection 68 formed upon the lever Get, whereby said lever is moved forwardly and the bell-crank lever 58 is oscillated to throw clutch-head 84 into engagement with the clutch member 82 of the bevel gear 80. This bevel gear 80 is thus locked to the shaft 32, which results in said shaft being rotated in an opposite direc tion. The endless cable 78 is then moved in an opposite direction, whereby the discharge tube 3 travels rearwardly, until bra ket 74 engages the forward extension 67, where upon the bell-crank lever 58 is again oscil lated to cause the clutch head 84 to engage the clutch member 83. The tube 3 is then made to travelfo-rwardly, and this operation of reciprocating tube 3 is repeated as long as the stacker is in operation. It is to be understood that the tension of the spring 61 is not sufficient to draw the clutch head 84 out of engagement with clutch member 82, for the frictional engagement of said clutch-head with the clutch member will prevent the movement of the bell-crank le ver 58 under the pull of said spring 61. However, when the clutch head 84 is out of engagement with both of the clutch members 81 and 83 as shown in Fig. 3, the pull of spring 61 will be suflicient to urge the clutch head 84: into engagement with the clutch member 83.

It will be noted that when the tubes 2 and 3 are vertically adjusted, the distance between the annular gear 105 and the bevel gear 90 is varied. This variation in the distance between these gears does not however, afiect the operation of the machine, for the shafts 88 and 92 telescope each other. It will accordingly be obvious that the tubes 2 and 3 may be vertically adjusted without interfering with the reciprocatory movement of the discharge tube 3. It will also be obvious that the shifting base 11 may be partially rotated in either direction to laterally adjust tubes 2 and 3, withoutinterfering with the operation of the stacker.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred embodiment of the same, and that numerous changes may be resorted to in the form, arrangement and proportions of the parts of the same, with-.

out departing from the spirit of my invention or the scope of the annexed claims.

Having fully described my invention, 1 claim 1. In apparatus of the character described, a base, a bracket pivotally mounted upon said base to swing in a substantially vertical plane, a driving gear rotatably mounted upon said base, telescoping tubes arranged above said base, means connected with said bracket for suitably supporting said telescoping tubes, means supported by said bracket for effecting reciprocatory movementof one of the telescoping tubes, the distance between the last named means and the driving gear being changed when said bracket and telescoping tubes are swung in a substantially vertical plane, and extensible driving connecting means between said gear and the last named means.

2. In apparatus of the character described, a base, telescoping tubes arranged above said base, supporting means. for said tubes swingingly mounted upon said base, means to cause the reciprocation of one of said tubes comprising a plurality of gears arranged near said tubes, an annular gear mounted upon said base, and extensible driving connecting means between said an nular gear and said plurality of gears.

3. In apparatus of the character described, a shifting base, telescoping tubes arranged above said base, means for supporting said tubes connected to said shifting base, means to cause the reciprocation of one of said tubes, an annular gear arranged upon said shifting base, and extensible driving connecting means arranged between said second named means and said annular gear.

4. In apparatus scribed, a base, a bracket pivotally mounted upon said base to swing'in a substantially vertical plane, a driving gear rotatably mounted upon said base, telescoping tubes arranged above said base, means connected of the character deiii) with said bracket for suitably supporting said telescoping tubes, means supported by said bracket for effecting reciprocatory movement of one of the telescoping tubes, the distance between the last named means and the driving gear being changed when said bracket is swung in a substantially vertical plane to raise or lower said telescoping tubes, and extensible driving connecting means between said driving gear and last named means, including telescoping shafts.

5. In apparatus of the character described, a suitably supported rail, a tube, wheels connected to said tube and disposed to tr vel upon said rail, a driven shaft arranged near said rail, bevel gears loosely mounted upon said driven shaft, means for rotating said gears in opposite directions, a clutch device for alternately locking said gears to said driven shaft, a bell crank lever for moving said clutch device, an actuating lever connected to said bell crank lever and provided with projections, means connected to said tube arranged to engage said projec tions to move said actuating lever, a drum mounted upon said driven shaft, a pulley mounted upon said rail, an endless cable trained about said pulley and said drum, and connecting means between said endless cable and said tube.

6. In apparatus of the character described, a supporting structure, including arail, telescoping tubes arranged near the rail, brackets connected with the movable tube and carrying wheels to travel upon said rail, a rotatable shaft journaled through the supporting structure, a cable connecting said rotatable shaft and movable tube to effect a recipr'ocatory movement of the latter, means to alternately rotate said shaft in opposite directions, including a member extending alongside said movable tube to be engaged by said brackets when said movable tube has reached its limit of travel in both directions.

7. In a machine of the character described, a supporting structure capable of being swung in a substantially vertical plane, telescoping tubes having connections with saidsuppo-rting structure, apparatus connectedwith the supporting structure to cause the tubes to telescope, a driving gear, the distance between the driving gear and said apparatus being changed when said supporting structure is swung to raise and lower said telescoping tubes, and extensible driving connecting means between said driving gear and said apparatus.

8. In a machine of the character described, supporting structure capable of being swung in a substantially vertical plane, telescoping tubes having connections with said supporting structure, apparatus connected with the supporting structure to cause the tubes to telescope, a driving gear, the distance between said driving gear and said apparatus being changed when said supporting structure is swung to raise and lower said telescoping tubes, and telescoping said gears in opposite directions, a device to alternately lock said gears with said rotatable shaft, a bell-crank lever to shift said device, a rod connected with said bellcrank lever and extending forwardly near and alongside said telescoping tubes, and means carried by said rod to be engaged by said brackets during the travel of said movable tube in either direction.

10. In a machine of the character described, a supporting structure, telescoping tubes, brackets connected with the movable telescoping tube and carrying wheels to engage the supporting structure, apparatus connected with the supporting structure to cause said tubes to telescope, a bell-crank lever to control the operation of said apparatus, a rod connected with said bell-crank lever and extending forwardly near and alongside said movable tube, and a member adjustably mountednpon said rod to be engaged by one of said brackets.

11. In a machine of-the character described, a shifting base, an annular gear rotatably mounted thereon, a supporting structure pivotally mounted upon saidshifting base inwardly of said annular gear, telescoping tubes having connections with the supporting structure, means connected with the shifting base to swing said supporting structure in a substantially vertical plane for raising and lowering said tubes, appararail, telescoping tubes supported by said rail, a rotatable shaft journaled through said supporting structure, a drum connected with said rotatable shaft, a pulley rotatably mounted upon said rail, a cable engaging said drum and pulley and having connection with the movable telescoping tubeyapparatus to alternately rotate said shaft in opposite directions, including a plurality of gears and a clutch device mounted upon said rotatable shaft, and means including a member disposed alongside said movable tube, whereby said clutch device may be shifted by said movable telescoping tube, when the latter has moved a certain distance in either direction.

13. In apparatus of the character described, abase, an annular driving gear rotatably mounted upon said base, a supporting structure pivotally connected with said base to oscillate in a substantially vertical plane, telescoping tubes arranged above said base and having connections with said supporting structure, the distance between said annular driving gear and the upper portion of the supporting structure being changed when the latter is swung in a subporting structure, a driving gear, said supporting structure being adapted to be swung in a substantially vertical plane to raise and lower said telescoping tubes, whereby the distance between the driving gear and the upper portion of said supporting structure is changed, means to effect a reciprocat ory movement of one of the tubes, includlng a plurality of gears, and extensible driving connecting means between said driving gear and said plurality of gears.

15. In apparatus of the character described, a base, a supporting structure pivotally mounted upon said base, telescoping tubes having connections with said supporting structure, means to effect a reciprocatory movement of one of said telescoping tubes, including a plurality of gears mounted upon said supporting structure, a driving gear rotatably mounted upon said base, the supporting structure being adapted to be swung in a substantially vertical plane to raise and lower the telescoping tubes, whereby the distance between said plurality of gears and the driving gear is changed, and driving connecting means between the driving gear and said plurality of gears, including telescoping shafts.

16. In a machine of the character described, a support, telescoping tubes disposed above the same, a supporting structure for said tubeshaving connection with said support and adapted to be moved for raising and lowering said tubes, apparatus connected with said supporting structure to cause said tubes to telescope, driving means mounted upon said support, and extensible means connecting the driving means and said apparatus.

17. In a machine of the character described, a support, telescoping tubes disposed above the same, a supporting structure for said tubes having pivotal connection with said support and adapted to be swung in an approximately vertical plane for raising and lowering said tubes, apparatus connected with the upper portion of said supporting structure to cause said tubes to telescope, driving means mounted upon said support, and extensible means connecting the driving means and apparatus.

18. In a machine of the character described, a support, telescoping tubes disposed above the same, a supporting structure for said tubes having pivotal connection with said support and adapted to be swung in a substantially vertical plane for raising and lowering said tubes, apparatus connected with the'upper portion of said supporting structure to cause said tubes to telescope, a driving gear mounted upon said support, and telescoping shafts for forming extensible connecting means between said driving gear and apparatus.

19. In a machine of the character described, telescoping tubes, a supporting structure therefor, apparatus to cause said tubes to telescope, a member connected with said apparatus and extending longitudinally of the movable tube and adapted to be actuated by said movable tube when the same has traveled a certain distance in either direction, whereby the direction of travel of said movable tube is automatically reversed.

20. In a machine of the character described, telescoping tubes, a supporting structure therefor, apparatus to cause said tubes to telescope including a bell crank lever, a member connectedwith said bell crank lever and extending longitudinally of the movable tube to be actuated by said movable tube when the same has traveled a certain distance in either direction, whereby the direction of travel of said movable'tube is automatically reversed. V

21. In a machine of the character described, telescoping tubes, a supporting ble shaft and the movable telescoping tubes,

gears loosely mounted upon said rotatable shaft, means to rotate said gears in opposite directions, a clutch device splined upon said rotatable shaft for alternately locking either of said gears to the rotatable shaft, and means to effectthe movement of said clutch device longitudinally of the rotatable shaft, including a member extending longitudinally of the movable telescoping tube and adapted to be actuated thereby when said movable telescoping tube has traveled a certain distance in either direction.

22. In a machine of the character described, relatively stationary and movable telescoping tubes, a supporting structure therefor, a rotatable shaft suitably connected with the supporting structure, connecting means between said rotatable shaft and the movable telescoping tube, apparatus to alternately rotate said shaft in opposite directions, and means to control the operation of said apparatus with respect to the direction of rotation of said shaft, including a member disposed longitudinally of the movable tube to be actuated thereby when the same has traveled a certain distance in either direction.

In testimony whereof I afiiX my signature in presence of two witnesses.

RODDY F. MEYERS.

Witnesses JOHN H. GARNsEY, STELLA I-InNIoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

Images