US1502870A - Reciprocating movement - Google Patents

Description

July. 29.1924;

o. P, NQRMAN,

RECIPROCATING MOVEMENT YFiled. July 14.

Fig. 7

1923 3 Shasta-She. 5

Patented July Z9, 1924.

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isaasm gPATENT OFFICE.

RECIPROCATING MOVEMENT.

Application filed July 14, 1923.

T all whom t may cof/worn.'

Be it known that I, ORvILLE P. NORMAN, a citizen of theUnited States, and resident of Los Angeles, in the county of Los Angeles and State of California, have invented new and useful improvements in Reciprocating Movement, of which the following is a specification.

This invention relates to a mechanical movement for trai'isforming rotary into reciprocating movementv and pertains to the type of movements disclosed in United States Letters Patent 1,210,353, granted to me December 26, 1916, and 1,268,048, granted to me May 28, 1918. The present invention is a device of the same character but much simplified and changed in detail.

The movement shown herein comprises a reciprocable carriage having racks disposed to be engaged alternately with oppositely rotating gears, and mechanism actuated by the carriage whereby the proper racks are engaged with the proper gears at the ends of their movements. The objects of this invention are to provide a movement of the character described having details of structure whereby to accomplish the above mentioned objects and to positively lock the parts in engaged posit-ion during their operative periods.

These objects together with other objects and corresponding accomplishments are obtained by means of the embodiment of my invention illustrated in the accompanying drawing, in which: I

Fig. 1 is a front elevation of the movement; Fig. 2 is an elevation in section as seen on the line 2-2 of Fig. 3; Fig. 3 is a cross section as seen on the line 3 3 of Fig. 1; Fig. 4 is a' fragmentary detail view in ele-vationof a portion of the locking mechanism in a position different from that shown in Fig. 2; Fig. 5 is a fragmentary view in elevation showing a fragment of the bridge and the locking mechanism 'in another position; Fig. 6 is a fragmentary cross section similar to that shown in Fig. 3 with the parts in position to move the carriage in the opposite direction to that in which it is being moved in Fig. 3; Fig. 7 is a fragmentary view in elevation of one end of the structure with parts broken away to show the abutment mechanism; Fig. 8 is a view indicating positions ofthe bridge elevating mechanism; Fig. 9 is a transverse section througlithetable showing the neutral lock;

Serial No. 651,623,

and Fig. 10 is a plan view of the table showing a fragment thereof and the neutral lock.

Referring more particularly to thegdrawing, A indicates the frame or bed upon which is sldingly mounted the reciprocating carriage B. The drive mechanism is indicated generally by C. Arrows in the several figures indicate the direction of travel of the parts.

The frame A comprises pairs of legs and 16, the pairs being suitably spaced and shown herein as formed of angle bars. rlhe front pair of legs 15 are longer than the rear and mounted thereon is an angle bar 17. Mounted upon the top ofv legs 16 at a lower level is an angle ba'r 18. The legs and angle bars are so spaced as to leave a well between them. Mounted upon angle bar 18 is a T- bar 19 forming a rail for the table. Mounted upon angle bar 17 is an angle bar 20 hav- .mg an extension 21 inclined thereto and forming a rail for the table.

The table comprises a plate 22 provided with an angle bar 23 overhanging rail 19. Bracket straps 24 extend downwardly and journalled thereon are rollers 25 riding against the lower edge of rail.19. Mounted on the bar 23 above the rail 19 are rollers 26. On the under side of the table in alignment are guides 27. These guides are blocks having recesses conforming to the shape of rail 21. Pintles 28 secured to the table have mounted thereon rollers 29 which underhang the rail 21.

Mounted upon vthe upper leg of angle bar 18 of the frame is a bridge 30. Bridge 30 has at its far end an angular pin 31 fitting in a corresponding recess in a block 32 mounted upon bar 18, see Fig. 2. This articulation permits the bridge to be tilted by raising and lowering the forward end. The forward end of bridge has depending therefrom an extension 33 with spaced laterally projecting lugs to receive the ends of a trip lever. A rack bar 34 is provided on its under surface with rollers 35 riding on bridge 30. The vertical leg of the bridge is disposed in the well on the frame. A rack 36 mounted'on the bar is provided with teeth on its lower side. This rack is at the rear of bar 34. At the forward side oftheV bar'34 is a bevel rack 37. A roller 38 engages the bar 17 and a roller 39 journalled on bar 34 engages bar 18 to assist in maintaining the bar 34 in proper posit/ion. during its travel.-

' slot.

Secured to the trame is a block 40 serving as a bearing for a shaft 41. A similar bracket 42 mounted on the other side of the frame serves as a bearing for the opposite end of the sha'i't. Fixed to the shaft 41 is a bevel gear 43. Bevel gear 43 meshes with a bevel pinion 44 jonrnalled on angle bar l?. The bevel pinion is disposed to be engaged with the bevel rack 37 at the proper time. Mounted upon ythe shaft 41 so as to rotate therewith is a spur pinion 45. This gear is disposed to engage the rack 36 at the proper time. Extending between the legs 'l5 is a bar 46 having journalled therein a shaft 47 which is geared to a prime mover of some sort, not shown herein. A bevel pinion 48 is mounted upon shaft 47 and meshes with bevel gear 43 so that rotation of the shaft 47 will cause pinions 44 and 45 to rotate.

It will be not-ed that the plate 22 of the carriage clears the bar 34. At the far end of bar 34 on its upper surface is a projection 49 having a transverse depression or Mounted upon the bed plate 22 on the under side is a bifurcated bracket section 50, see Figs. 9 and l() to which is pivotally secured a bracket catch 5l. The catch is disposed to enter the depression in keeper and extends through a slot in the bed plate 22. lt is provided With a head 52 which limits the movement or' the catch. The catch when tree may gravitate to the position shown in Fig. 9 and enter the keeper depression. The sides of the keeper are inclined so that as the table is moved with rei spect to the bar, the catch will ride upwardly over the edge of the keeper and into the depression. Secured to the bed plate ad jacent the catch is a bracket 53. The

bracket 53 has pivot-ally niounted therein a `rated and depressed so that when in its lower position rack 36 is in mesh with gear a-.nd when the bar is. in its upper yposition. rack 37 is in mesh with pinion 44. A ssume that the shatt- 41 is rotating in a. clockwise direct-ion. When bridge 30 and bai-,34 are in their lower position with rack 36 in mesh with pinion 45. the carriage will move to the right. 1When bridge Bilfbar 34 d rac-k 37 are in their upper position. rack 37 will be in mesh with bevel pinion 44 and the carriage will move to the left. ln either ot these positions only one' rack is in mesh With the driving gears. Pivotally mounteil upon the trame is a lift lever 5. rllhe rear end ol. lever is disposed between the lugs on bracket 33. lllhen the bridge 30 is in its lower position lever 55 will be horizontal. @Then the ifar vend is swung downwardly to the position shown in Fig. bridge 30 will be raised. Pivoted in a bracket 556 .of the traine is a lock latch 57. The latch has an extension or trigger p orticn 58 adapted to enter a corresponding recess in the bracket JI when the bridge is raise-d. rl'his position is shown in Fig. A weight on the end et 'the catch tends to hold the latter in the position shown in Fig. 5. lever (SO is mount ed on the bracket`r see Fig. and is connected by a link 6l to the lock latch so that the latter ma)v be tripped by operation oil the le- Pivotally mounted upon the Vtrame at the other end of lever 55 is a lock latch having` a finger 62 adapted to be disposed beneath the end ot lever at the proper time. rllhis latch has a. weight 53 tendingto hold it in the position shown in F and A linger 64 extends 'troni the latch so as to be operated by a cross-over lever. The cross-over lever comprises an arm having an elongated slot in which is disposed ia pin 65, the latter serving as a pivot pin 'tor the lever. The arm 66 of the lever is rounded on its upper end. @n the rear of the lcv r is a projection 67. see Fig. 8. adapted to be engaged with a piu (38 mounted on the frame. rllhe` other en-:l ot the cross-over lever is weighted as indicated by 69, tending` to-maintain the cross-over lever in the position shown in Fig. ExtendingA to the front oft the lever is a pin 70. lt will be noted that arm G6 is disposed to enc e the finger 64 as shown in Fig. 4a and 1 teeth are engaged with pinion A guard embracing the cross-over lever is indicated by 'il and holds the latter against lateral displacement. Depending' from the har is a hook 72 arranged toiengage the piu "m as shown in Fig. Fi. Slide-bh. mount ed upon the trame A is a trip rod 73. best H The trip rod is bent back shown in Fig. i. upon itselt1 indicated by 74 and hooks about lever 60.

Referring to Fig. 7. if the hook rod 73 is moved to the right` lever will be swung outwardly actuating; the: latch 5 The trip rod is disposed just below the bed plate 22. and adjustably mounted thereon is an abutment collar 75 serving.' as an abutment for the bed plate. rllhe collar may 'be secured in any1 desired position by means of a set screw 76. AReferring' to Fig. it is obvious that the table in its movement to the lett will engage the abutment and move lock latch 57. When the table or carriage is moving to the left the bridge 3G is in itsI upper position and lock latch 57 is in the position shown in Fig. 5 locking the bridge in its upper position.

A pull upon the link 6l will cause lll() llll the loci; latch trigger 58 to be pulled out. of the recess in bracket 33 and the latter can then drop to its lowerposition. Finger 62 ot the latch at the opposite end will be moved by a weight 63 so as to be disposed beneath the lever in the position shown in Fig. 2. 'Ihe bridge isthen locked in its horizontal position.. Y Dropping of the bridge drops the bar 8e and rack 36 meshes with pinion ai: as shown in Fig. 3. Vllhe carriage then moves to the right. At the end ot' its travel to the right hook T2 engages pin TO pushing the cross-over lever arm 66 toward pinioncausing it to mesh with the latter as shown in F ig. 4. The movement of the lower end of lever arm 66 causes it `to engage linger 64 and pull finger 62 from beneath the bottom of the lever 55 as shown in Fig. a. Movement of the pinion l raises the arm 66 causing the upper end ot it to engage the end orp rack 36 and to lift the bridge. The projection 67 rides over pin. 68 maintaining the lever 66 in engagement with the' pinion This causes the parts to be disposed in the position shown in Fig. 6 with bevel rack in mesh with gear 44.- and the table moves to the lett. The project-ion 67 rides over the top of pin 68 and the parts drop to the position shown in Fig. 2. rlhe carriage then moves to the lett. The table abuts the collar moves the trip rod 73. lever 60, and link 6l to pull latch 57 out of engagement with extension 33 and releases the bridge which lowers engaging rack 36 with pinion 45.

lVhat I claim is:

l. A mechanical movement comprising the combination of a frame, a carriage slidably mounted thereon and having a pair ot racks secured thereto, a pair o't pinions Igeared to rotate in opposite directions and disposed so that either will mesh with its corresponding' rack., and thereby move said carriage. and means operated by said carriage at the ends of its travel to alternately engage one rack with its pinion and then the other whereby to reciprocate the carriage.

2. mechanical movement comprising` the combination of a trame, carriage slidably mounted thereon and having a pair ot racks secured thereto, a pair of pinions geared to rotate in opposite directions and disposed so that either willmesh with its corresponding rack and thereby move said carriage, and means operated by said carriage at the ends ofv its travel to alternately engage one rack withl its pinion and then the other whereby to reciprocate the carriage, one of said means being an adjustable abutment whereby` the distance of travel may be controlled.

3. In a mechanical movement the combination of a frame, a carriage comprising` a bridge mounted thereon so as to be eleva-ted or depressed, a rack bar carrying a pair of racks slidably mounted on said bridge, a pair et' lpinions mounted on said frf. me and disposed so that in elevated position of the bridge one pinion engages a rack and in depressed position oi said bridge the other pinion engages the other rack, saidpinions being geared torotate in opposite directions, a carriage plate slidably mounted on said frame and engaged with said rack ba-r soas to be moved therewith, and means operated by said carriage at the ends of its travel to' alternately' engage one rack with its pinion and then the other whereby to reciprocate the carria-ge.

4. In a mechanical movement the combination of a frame, a carriage comprising a in'idge mounted thereon so as to be elevated or depressed, a rack bar carrying a pair of racks slidably mounted on said bridge, a pair of pinions mounted on said frame and disposed so that in elevated position of said bridge one pinion engages a raclr and in depressed position of said bridge the other pinion engages the other rack, said pinions being geared to rotate in opposite directions. a plate slidably mounted on said frame and engaged with said rack bar so as to be moved therewith, and means operated by said carriage at the ends of its travel to alternately engage one rack with the pinion and then the other whereby to reciprocate the carriage, one of said means being an adjustable abutment whereby the distance of travel of the carriage may be controlled.

5. In a mechanical movement the combination of a frame7 a carriage comprising a bridge articulated to said frame so that one end thereof may be tilted, a rack bar carrying a pair of racks slidably mounted on said bridge, a pair of pinions mounted on said frame and disposed so that in elevated position of said bridge one pinion enga-ges a rack and in depressed position the .other pinion engages the other rack, said pinions being geared to rotate in opposite directions, a plate slidably mounted on said frame and engaged with-said rack bar so as to be moved therewith, and means operated by said carriage at the ends of its travel to alternately elevate and depress said bridge whereby to reciprocate said carriage.

6. In a mechanical movement the combina-tion of a Jframe, a carriage comprising a bridge articulated to said frame so that one end thereof may be tilted, a rack bar carrying a pair of racks slidably mounted on said bridge, a air of pinions mounted on said frame and disposed so tha-t in elevated position of said bridgeone pinion engages a rack and in depressed position the other pinion engages the other rack, said pinions being geared to rotate in opposite directions, a plate slidably mounted on said frame and engaged `with said rack bar so as to be moved therewith, and means operated by LEU said carriage at the ends of its travel to alternately elevate and depress said bridge` `ivlnereby to reciprocate said carriage, one ot said means being an adjustable abutment whereby the distance of travel of the carriage may be controlled.

TQ In a mechanical mof'ement the combination o'l" a frame, a carriage'comprising a bridge articulated to said frame so that one end thereof may be tilted, a rack bar earrying a pair of racks slidably mounted on said bridge, a pair of pinions mounted on said frame and disposed so that in elevated position of said bri lge one pinion engages a rack and in depressed posit-ion the other pinion engages the other rack, said pinions being geared to rotate in opposite directions, a plate slidablymounted on said frame and engaged with said rack bar so as to be moved therewith, means actuated by said carriage at one end of its travel to elevate said bridge, means to loch said bridge in elevated position, means actuated by said carriage at the opposite end of its travel to release said bridge and rause depression thereof, and means to lock said carriage in `depressed position.

8. In a mechanical movement the combination of a frame, a carriage comprising a bridge articulated to said frame so that the ends thereof may be tilted, a rack bar carrying a pair of racks slidably mounted on said bridge, a pair of pinions mounted on said frame and disposed so that in elevated position of said bridge one pinion engages one rack and in depressed position the other pinion engages the other rack, said pinions being geared to rotate in opposite directions, a plate slidably mounted on said frame and engaged with said rack bar so as to be moved therewith, means actuated by said carriage at one end of its travel to elevate said bridge, means to lock said bridge in elevated position, abutment means actuated by said carriage at the opposite end of its travel to release said bridge and cause depression thereof, said abutment means including an adjustable abutment whereby to control the distance of travel of said carriage, and means to lock said carriage in depressed position.

9. In a mechanical movement the combination of a frame, a carriage comprising a bridge mounted upon said frame so as to be elevated or depressed, a rack bar carrying a pair of racks slidably mounted on said bridge, a pair of pinions mounted on said frame and disposed so that in elevated position of said bridge one pinion engages a raclf: and in depressed position of said bridge the other pinion engages the other rack, said pinions being geared to rotate in opposite directions, a plate slidably mounted on said frame, manually operable means to engage said plate with said rack bar so that the latter will be moved therewith, means operated by said carriage at the ends of its travel to alternately engage one rack with its pinion and then the other whereby to reciprocate the carriage.

it). In a mechanical movement the combination of a frame, a carriage comprising a bridge articulated to said frame so that one end thereof may be tilted, a raclr bar carrying a pair of racks slidably mounted on said bridge, a pair of pinions mounted on said frame and disposed so that in elevated posi tion of said bridge one pinion engages one rack and in depressed position of said bridge the other pinion engages the other rack, said pinions being geared to rotate in opposite directions, a plate slidably mounted on said bridge, manually operable means for engaging said plate with said rack bar so as to move the latter therewith, means operated by said carriage at the ends of its travel to alternately engage one rack with its pinion and then the other whereby to reciprocate the carriage, one of said means being an adtravel may be controlled.

ll. In a mechanical movement the combination of aframe, a carriage comprising a bridge articulated to said frame so that one end thereof may be tilted, a rack bar carrying a. pair of racks slidably mounted on said bridge, a pair of pinions mounted on said frame, and disposed so that in elevated position of said bridge one pinion engages a rack and in depressed position the other pinion engages the other rack, said pinions being geared to rotate in opposite directions, a plate slidably mounted on said frame, manually operable means for engaging said plate with said rack bar so as to be moved therewith, means operated by said carriage at the end of its travel to alternately raise and depress said bridge whereby to engage one rack with its pinion and thereby to reciprocate said carriage.

In Vwitness that I claim the foregoing I have hereunto subscribed my name this 7th day of July, 1923.

ORI/VILLE P. NORMAN.

instable abutment whereby the distance of

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