US2192016A - Control mechanism - Google Patents

Description

Feb. 27, 1940.

c. PETITJEAN CONTROL MECHANISM Filed Jan. 18, 1938 INVENTOR CLIFFORD 0591mm Patented Feb 27, 1940 PATENT"FF1E CONTROL MECHANISBI Uliiiord (l Petitjean, Waterbury, Conn, assignor to The Waterbury Farrel Foundry and Machine Company, Waterbury, Conn, a corporation of Connecticut Application January 18, 1938, Serial No. 185,499

30 Claims.

This invention relates to control mechanism, more particularly to that type of such mechanism as is associated witha ratchet and pawl device or the like. Such devices are usually constructed with a ratchet wheel fixed on a shaft, a pawl carrier journaled on the same shaft, a pawl mounted in the carrier and suitable mechanism for oscillating the carrier. During movement of the carrier in one direction the pawl engages a tooth 'on the ratchet wheel and imparts a partial rotation thereto and to the shaft; During the reverse movement oi the pawl carrier the pawl rides idly over the ratchet teeth. Thus, at predetermined periods, mov ment is imparted tothe shaft and therethrough to such mechanism, frequently feed rolls or the like, as may be associated therewith.

When such control mechanism is associated with an upsetting machine, header or the like, the advance of material, such as wire or. the like, by the feed'rolls should be in timed relation with other parts of the machine, such as the cut-off or shearing devices, wherehya full feed of material, between each successive cut-off or shearing operation, will be assured.

It is desirable during operation, for various reasons, that the feed of material should be stopped. This is usually accomplished by the manual manipulation of parts associated with the pawl to move it out of the'path of the teeth of the ratchet wheel and-thus. stop movement of the feed rolls, hence the feed of material.

Such manual manipulation is had through a part i on the pawl shaft as the pawl travels in either direction through an arc of a circle.

"If the arc of travel of the pawl ,is relatively slow, for all practical purposes, it is possible to manually manipulate the pawl so as to insure a full length feed. However, if such are of travel is rapid, as in machines operating at a high speed, it is extremely difiicult, in fact practically impossible, to manually manipulate the pawl,

in the above-described manner, to engage and disengage the pawl with the ratchet teeth at the proper time and assure a full length feed. A short feed of material, among other things, frequently results in the jamming of the short blank in a die or punch. In such case serious damage to other parts of upsetting machine, header or the like, is likely to result. A principal object of the invention is to obviate this difficulty and assure such a proper manual control of the pawl as to positively produce a full length blank. This by means of mechanism, simple in its structure and operation and positive in its results, and which may be attached to any machine with the minimum inconvenience.

To these and other ends, this invention'co'ne sists or a control mechanism, having new and novel features, as is above set forth, and as'will more particularly appear from the following description and accompanying drawing, wherein like numerals of reference indicate like parts in the several figures.

For the purpose of illustration only, the invention is disclosed in the accompanying drawing as being applied to an upsetting machine, header or the like. j

In the drawing:

Figure 1 represents a fragmentary view of this invention and a portionof an upsetting machine or a header;

Figure 2 is another view thereof;

Figure 8 is an enlarged sectional view thereof, the parts in section being taken generally upon line 3-.i of Figure 2; and

Figure 4: is an enlarged detailed view of the pawl and some adjacent parts, The numeral It indicates a portion of a conventional type of upsetting machine, header or the like, having a shaft carrying a crank plate l2 with a T-headed slot i3 in its face,

within which a crank pin I4 is slidably mounted.

feed roll (not shown) and a ratchet wheel Hi.

The above mechanism is well known in the art, and therefore, will not be more particularly described herein.

Mounted on the shaft rotation, is; a carrier H3, in which is journaled a pawl shaft 20 having a pawl ill at one end and a notched collar 22 at the opposite end. 7

Fixed in any convenient manner to the carrier it is a block. Ed, in which a pressure pin 25 having a tapered inner end 26 and an enlarged head 27 is slidably mounted substantially parallel with the axis of the shaft il'. Also slidaicle in .the block it, at substantially a right angle'to the pressure pin 2%, is a pawl pin 28,-the 29 of which contacts with a face onthe collar 22, which is one wall of the notch in said collar. The inner end of the pawl pin 28 projects in front of the pressure'pin 25 and is engaged by the tapered end it during the inward movement thereof.

Slidably mounted on the reduced end 38 of the shaft H, is a sleeve 3i having a knurled head 32 and a collar 63, within which is an annular groove 33. The outward position of this sleeveis determined by any convenientineans, The means shown is a screw t lthreaded in the shaft H, the head 35 of which engages a shoulder 36 on the sleeve. The groove 33 receives the pressure pin head 21, substantially as shown in n, for free relative,

head i Figure 3. In this figure, both the pressure pin 25 and the sleeve 3! are in their out positions, determined by the adjustable screw 34. When in this out position the tapered end 25 of the pressure pin 25 is out of engagement with the pawl pin 28 and the pawl 25 travels in the path of the ratchet teeth and when engaged therewith actuates the shaft 51 through the ratchet wheel I8.

To move the pawl out of the path of the ratchet teeth, the sleeve 3| is moved inwardly by manually exerting pressure on the knurled head 32. This causes the pressure pin 25 to slide inwardly and the engagement of its tapered end 26 with the pawl pin 28 forces the latter outwardly. Pressure is thus applied through the pawl pin to the collar 22, winch, with the pawl shaft 28, is rotated slightly upon its axis, and the pawl 2B is thereby moved out of the path of the ratchet teeth. With the pawl in this relative position it travels with the carrier through its. arc of travel without engaging'the ratchet teeth and without imparting motion to the ratchet wheel or the shaft upon which it is mounted.

The spring fid'between a fixed pin and the collar 22 returns the pawl to its former path when. pressure'of the pawl pin is released so that it will again be in the path of travel of and engage the ratchet teeth and restore the feed of material.

It is desirable, although not necessary, that the tapered end 26 be out of engagement with the pawl pin 28 when the pressure pin 25 is in its out position.

-A detent 37 in a threaded plug ill, the inner end of which is projected into an annular groove 38, in the pressure pin 25 by the spring 39, holds the pressure pin against accidental or premature movement. As the detent 3? has a conical end and the walls of the groove 3% are flaring, manual operation of the sleeve moves the detent outwardly against pressure of the spring 3!! and permits endwise movement of the pressure pin 25. Similar engagement of the detent 37 with the groove ll assures a similar holding of the pressure pin 25 against accidental movement when in its in-position.

As the sleeve 3i is substantially stationary it may be grasped without difficulty by the operator, and through its manipulation he may move the pawl into and out of the path of the ratchet teeth l irrespective of its speed of travel.

To assure a positive timing of this control mechanism with other parts, such as the cut-oif or shearing devices, means are provided whereby movement of the pawl is only possible at predetermined times.

44 fixed thereon, the outer end of the former lever being movable into and out of the path of movement of the collar 69 on the sleeve 3!.

Journaled on a stud 45,.mounted on a fixed part, is a crank 46, one arm of which projects into the path of a cam-piece 58 fixed-on the. crank plate i2 and the other arm is connected with the lever it by the rod 47, having the usual means for adjusting its effective length. The

cam piece 48 is so shaped and positioned in reference to the crank plate l2 that the lever #33 during the feed stroke of the carrier it (moving clockwise when viewed as in Figure 2), will project into the groove 33 of the collar 39, when in its inward position, and thus prevent pulling out the sleeve 3! and engagement of the pawl with the teeth of the ratchet disk 88.

When the arm of the crank 46 rides on the This timing means consists es s'entially of a rock shaft 32 having levers 4-3 and high part of cam piece 68, the lever 43 is moved out of the groove 33 and the sleeve 36 can then be moved to its out position, thus allowihg the pin 28 to ride off the conical end of the pressure pin 25 andthe pawl 2i to drop into engagement with the teeth on the ratchet disk 18. This is possible only when the carrier 19 moves clockwise and insures a full length feed of material. Consequently, the sleeve 38 cannot be either pushed in to disengage or pulled out to engage.

the pawl 2i with-the ratchet disk l8 when the carrier I9 is moving couhter-clockwise Thus the sleeve is locked against inward movement by the lever 43 when the carrier l9 travels counterclockwise. As the teeth on the ratchet disk l8 are slightly undercut the pawl is not readily disengaged from such teeth until the carrier" IE) begins to again move clockwise.

This invention is not limited to the specific construction, arrangement or form of the parts herein described, as it is capable of numerous modifications and changes without departing from the-spirit and scope of the claims.

What I claim is:

1. In mechanism of the character described; a shaft; a pawl and ratchet mechanism for im parting movement to theshaft; means for moving the pawl into and out of the. path of the ratchet teeth, including. a member slidably mounted in a path substantially parallel with the shaft and spaced therefrom; an intermediate member movable at right angles to said slidably mounted member and disposed between the latter and the pawl and through which the pawl is moved about its axis; and a reciprocating member for imparting movement to the sliding mem ber.

2. In mechanism of the character described; a shaft; a pawl and ratchet mechanism for imparting movement to the shaft; means for moving the pawl into and out of the path of the ratchet teeth, comprising in part a manually,

1 parting movement to the shaft; means for moving the pawl into and out of the path of the ratchet teeth,.comprising in part a manually.

controlled reciprocating member with its axis substantially coincident with the axis of the shaft; and a longitudinally shiftable member adjacent to said shaft and substantially parallel therewith that has an operative connection with the first mentioned member. i

4. In mechanism of the character described; a shaft; a pawl and ratchet mechanism for ime parting movement to the shaft; means for moving the pawl into and out of the path of the ratchet teeth, comprising in part a slidably mounted member that oscillates with the pawl and ratchet mechanism, and having a head thereon; and a second member slidably mounted on the shaft and having an operativeconnection with the first mentioned member through the said head.

5. In mechanism of the character described; a A shaft; a pawl and ratchet mechanism for imparting movement to the shaft; means for moving the pawl into and out of the path of the ratchet teeth, comprising in part a manually controlled member slidably mounted on said shaft; and a second member spaced from'the shaft'tha t oscil- Git lates with the pawl and ratchet mechanism, and having a part thereon that projects-into a groove in the first mentioned member.

6. In mechanism of the character described; a shaft; a pawl and ratchet mechanism for impartingmovement to the shaft; means for-moving the pawl into and out of the path of the ratchet teeth, comprising in part a manually controlled member movable with its axis substantially coincident with the axis of the shaft; a second memberslidably mounted adjacent to said shaft and having ,an operative connection with the first mentioned member; and a pin movable in a path at anangle to said shaft and projecting into the path of movement of the last mentioned member.

, 7 In mechanism of the character described;,a shaft; a pawl and ratchet mechanism for imparting movement to the shaft; means for moving the pawl into and out of the path of the ratchet teeth, comprising in part a manually controlled member with its axis substantially coincident with the axis of the shaft and movable substantially parallel with said axis; and a reciprocating second member, slidably mounted adjacent to said shaft and having an operative connection'at its inner end with the first mentioned member.

8. In mechanism of the character described; a shaft; a pawl and ratchet mechanism for imparting movement to the shaft; means for moving the pawl into and out of the path of the ratchet teeth, comprising in parta manually controlled member movable with its axis substantially coincident with the axis of the shaft; a secondmem ber slidably mounted adjacent to said shaft and having an operative connection with the first mentioned member; and means holding said sec-- ond member against accidental movement when in one or more of itspositions.

9. In mechanism of the character described; a shaft; a ratchet wheel thereon; an oscillating carrier on the shaft; a pawl mounted in the carrier; means for actuating the pawl relative to the carrier, whereby it is moved into and out of the path of the ratchet teeth, comprising in part an element'mounted in the carrier and having engagement with a part fixed to the pawl; a pressure member mounted so as to oscillate with the carrier and move independently thereof; and a -member slidable axially on the shaft having an I a. shaft; a pawl and ratchet mechanism for imparting movement to the shaft; means for moving the pawl into and out of the path of the ratchet teeth, the axis of a portion of said means being substantially coincident with the axis of the shaft; and means for preventing the move- 7 merit of said means except when the pawl and ratchet mechanism is in a predetermined relative position. r

11. In mechanism of the character described; a shaft; a pawl and ratchet mechanism for im-,

parting movement to the shaft; means for moving the pawl into and out of the path of the 12. In combination with a shaft; a ratchet wheel thereon; a carrier movable on the shaft; a pawl journaled in the carrier; and means for moving the pawl into and out of thepath of the teeth of the ratchet Wheel, a portion of said means being slidable axially on the carrier and another portion upon a part independent thereof and slidable substantially parallel therewith.

13. In combination with a shaft; a ratchet wheel thereon; a carrier movable on the shaft; a pawl journaled in the carrier; and means for moving the pawl into and out of the path of the teeth of the ratchet wheel, a portion of said means being movable on the carrier and anotherportion upon a part independent thereof and slidable substantially parallel therewith and having an operative connection with said first mentioned portion.

14. In combination with a shaft; a ratchet Wheel thereon; a carrier movable on the shaft; a

pawl journaled in the carrier; means for mov- 15. In combination with a shaft; a ratchet wheel thereon; a carrier movable on the shaft; a pawl journaled in the carrier; a collar associated with the pawl; a member movable in anclwith the'carrier, having contact with said collar; a second member having engagement with said member and movable on and with the carrier at an angle to said member; and a sleeve or the like having an operative connection with the last mentioned member and slidably mounted on the shaft.

16. In combination with a shaft; a ratchet wheel thereon; a carrier movable on the shaft; a pawl journaled in the carrier; and means for moving the pawl into and out of the path o-fthe teeth of the ratchet wheel, comprising in part companion members movable on and with the carrier at an angle to each other one member being substantially parallel with the shaft and spaced therefrom; andan independent member movably mounted on the shaft and through which the companion members are actuated and the pawl caused to move in the carrier away from the teeth of the ratchet wheel. I

17. In mechanism of the'character described; a shaft; a pawl and ratchet mechanism for imparting an intermittent movement to the shaft; and means operative only after the completion of such intermittent movements to move the pawl out of the path of the ratchet teeth; and positively controlled means to prevent actuation of such pawl moving means during the movement of the shaft.

18. In mechanism of the character described; a shaft; a pawl and ratchet'mechanism for imparting an intermittent movement to the shaft; means whereby the pawl may be lifted out of the path of the ratchet teeth between said intermittent movements; and means movable into and out of the path of said means for locking the lifting means against movementexcept at predetermined times. 19. In mechanism of the characterdescribed; a pawl and. ratchet mechanism for imparting movement to the shaft; means for moving the pawl into and out of the path of the ratchet teeth, comprising in part, a member movable on the shaft; and means movable into the path of said member to prevent movement thereof when the pawl and ratchet mechanism is in a predetermined relative position.

20. In combination with a shaft; a ratchet Wheel thereon; a carrier movable on the shaft; a pawl journaled in the carrier; a member movable in and with the carrier for imparting independent movement to the pawl; a second member movable on and with the carrier, having engagement with the first mentioned member; a sleeve or the like, having an operative connection with the last mentioned member and slidably mounted on the shaft; and means movable into the path of the sleeve to prevent movement thereof when the ratchet and pawl mechanism is in a predetermined relative position.

21. In combination with a shaft; a ratchet wheel thereon; a carrier movable on the shaft; a pawl journaled in the carrier; a member movable in andwith the carrier for imparting independent movement to the pawl; a second member movable on and withthe carrier, having engagement with the first mentioned member; a sleeve or the like, having an operative connection with the last mentioned member and slidably mounted on the shaft; means for actuating the carrier from a rotary part; and other means, deriving its motion from a rotary part for preventing movement of the sleeve except when the pawl and ratchet mechanism is in a predetermined relative position.

22. In combination with a shaft; a ratchet wheel thereon; an oscillating carrier on the shaft; a pawl mounted in the carrier; a member mounted in and movable with the carrier for imparting independent movement to the pawl; a second member movable on and with the carrier, having engagement with the first mentioned member; a sleeve or the like, having an operative connection with the last mentioned member and slidably mounted on the shaft; means for actuating the carrier from a rotary part; and other means deriving its movement from a rotary part for preventing movement of the sleeve except when the pawl and ratchet mechanism is in a predetermined relative position.

23. In combination with a shaft; a ratchet wheel thereon; an oscillating carrier .on the shaft; a pawl mounted in the carrier; a member mounted in and movable with the carrier for imparting independent movement to the pawl; a second member movable on and with the carrier, having engagement with the first mentioned member; a sleeve or the like, having an operative connection with the last mentioned member and slidably mounted on the shaft; means for actuating the carrier from a rotary part; and cam actuated means for preventing movement of the sleeve except when the pawl and ratchet mechanism is in a predetermined relative position.

24.-In combination with a shaft; a ratchet wheel thereon; an oscillating carrier on the shaft; a pawl mounted in the carrier; a member mounted in and movable with the carrier for imparting independent movement to the pawl; a second member movable on and with the carrier, having engagement with the first mentioned member; a sleeve or the like having an operative connection with the last mentioned member and slidably mounted on the shaft; means for actuating the carrier; a member, which in one of "its positions is in the path of the sleeve and permits movement thereof; and cam means for actuating the member.

25. In mechanism of the character described; a pawl and ratchet mechanism for imparting movement to the shaft; means for moving the pawl into and out of the path of a the ratchet teeth, comprising in part, a member movable on the shaft; and cam actuated means movable into the path of said member to prevent movement thereof when the pawl and ratchet mechanism is in apredetermined relative position.

26. In mechanism of the character described; a shaft; a pawl and ratchet mechanism for imparting movement to the shaft; means for-mow ing the pawl into and out of the path ofthe ratchet wheel, comprising in part, companion members, one member being manually actuated substantially parallel with the shaft and imparting movement to the other member; and inter- 1 mediate mechanism between the latter 1 of said members and the pawl. I

27. In mechanism of the character described; a shaft; a pawl and ratchet mechanism forimparting movement to the shaft; means for'moving the pawl into and out of the pathof the ratchet wheel, comprising in part companion members, means to mount saidmembers forbodily sliding movements in spaced but substantially parallel planes, one operated by the movement of the other; and intermediate mechanism'between one of said members and said pawl, for imparting movement to the latter.

28. In mechanism of the character described; a shaft; a pawl and ratchet mechanism for imparting movement to the shaft; means for mov-f ing the pawl into and out of the path of the ratchet wheel, comprising in part companion members, one operated by the movement of the other; and intermediate mechanism between onev of said members and said pawl, one of said companion members being mounted substantially concentric with the shaft, and the other on a part that oscillates in relation to said-shaft.

29. In mechanism of the character described; a shaft; a pawl and ratchet mechanism for imparting movement to the shaft; means for moving thepawl into and out of the path of the ratchet wheel, comprising in part companion members having an int'erme'shing engagement members, one operated by the movement of the other, intermediate mechanism between oneof said members and pawl for imparting movement to the latter, and means movable into and out of the path of one of said members. to permit movement thereof when the pawl and ratchet mechanism is in predetermined positions I CLIFFORD o. PEITrJEAn.

Images