US2492911A

US2492911A - Armature wedging machine

Info

Publication number: US2492911A
Application number: US662132A
Authority: US
Inventors: Howard L Williams; Glen W Mclean
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-04-15
Filing date: 1946-04-15
Publication date: 1949-12-27
Anticipated expiration: 1966-12-27

Description

1949 H. L. WILLIAMS T AL ARMATURE WEDGING MACHINE 2 Sheets-Sheet l Filed April 15, 1946 Dec. 27, 1949.

H. L. WILLIAMS ET AL ARMATURE WEDGING MACHINE 2 Sheets-Sheet 2 Filed April 15, 1946 Howard L. VW///Q/775' 6/8/7 'W. /70 h ax? INVENTORS BY 1 v Patented Dec. 27, 1949 ARMATURE WEDGING MACHINE Howard L. William and Glen W. McLean, Spokane, Wash.

Application April 15, 1946, Serial No. 662,132

4 Claims.

The present invention is directed to a machine for securing coils in armatures.

' The primary object of the invention is to provide a machine of this nature so constructed that predetermined lengths of fibrous rope or the like will be effectively forced into the armature slots to positively retain the coil wires therein.

Another object of the invention is to provide a machine of this character which is simple in construction, positive in operation, and one which will function in an efficient manner.

Heretofore, the coils were retained in the armature slots o'r grooves by wedges of wood or fiber strips handled singly, and an important object of the present invention is to overcome this objection by utilizing predetermined lengths of fibrous rope, adapted to be successively forced into the armature slots and into engagement with the coils to positively retain the same in the respective slots.

With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawings, in which:

Figure 1 is a front elevation.

Figure 2 is an end View.

Figure 3 is an enlarged detail of the rope cutting blades.

Figllre 4 is a sectional view on line 4s of Figure 1.

Figure 5 is a perspective view of one of the rope feeding dogs.

Figure 6 is a sectional view on line 6-6 of Figure 2.

Figure 7 is a sectional view on line 'i-'l of Figure 8.

Figure 8 is a sectional view on line 8-3 of Figure 1.

Figure 9 is a sectional view on line 99 of Figure 8.

Referring to the drawings, l designates a supporting base and rising therefrom is a standard 2. and formed intermediate the ends thereof is a platform 3 which rotatably supports a table &. Carried by the table is a cradle 5 for supporting the armature 6 formed with the customary slots 1 for receiving the usual coils 3.

The cradle 5 carries a rib 9 adapted to engage the lowermost slot 1 of the armature to maintain the same in proper position for receiving the rope It to be wedged into the alined uppermost slot of the armature, as clearly shown in Figure 2.

A yoke H is provided and includes horizontal laterally spaced arms [2 slidably adjustable in brackets i3 mounted on the sides of the cradle 5. Since the armature shafts frequently vary in length the yoke can be easily adjusted in order that one of its ends will be properly engaged therewith.

A vertically movable bracket I5 is associated with the standard 2 and is formed with a vertical bearing 86, and engaged therein is a plunger E1, the lower end of which has fixed thereto an elongated rope wedgingplate I8. The plunger enters a cylinder i9, and threadedthereon for adjust-' ment is a collar 20, the purpose of which will later appear.

The cylinder i9 is formed with opposed slots 2 l and in which the plate I8 is adapted to operate during vertical travel, there being a pin 22 carried by the plunger H for engagement with the. shoulders 23 of the cylinder l9, said pin being movable in one of the slots 2i, the purpose of which will appear later.

A block M is carried by the cylinder i5 and has formed therein a longitudinal slot 25 alined with the slots 2[ of the cylinder I9, and it is under this slot 25 that a selected armature slot 7 is placed when a section of the rope It is to be wedged into the slot by the blade I8.

Fixed to the ends of the block 24 are cross bars.

26 and 27 and slidable in these bars are

rods

28 and 29, having one of their ends connected by a cross head 30. The rod 28 is connected with the bar 2? by a coil spring SI, and the bar 29 has threaded on one end a nut 32. This nut has swivelly connected therewith a plate 33 fixed to one end of a rod 34 and fixed to said rod is a handle 35 and is slidable on the rod 29, the purpose of which will be later explained.

A pair of levers 36 are provided, and are pivotally connected, as at 31, to the bar 25, said levers having fixed thereto rope severing blades 38, said levers being connected at their upper ends by a coil spring 39.

' Each lever has formed thereon a cam ill adapted to engage the pin 22 carried by the plunger l1, and the confronting edges of the levers are formed with recesses 4! below said cams so that the pin will enter the area below the cams, defined by the recesses il, when the plunger l'i moves downwardly. From constant use the cams 46 will wear and in which event rollers Q? are adjustably mounted on the levers to compensate for this wear by being in the path of movement of the pin 22.

Pivotally connected with the cross bar 26 is a 3 spring controlled dog 43, there being a similarly mounted dog 44 on the cross head 30, said dogs serving to control the feeding of the rope II] which is fed from a reel, not shown.

Surrounding the plunger I1 and located between the bearing I6 and cylinder I9 is a coil spring 45, there being a washer 45' on the plunger adapted to contact with the upper end of the collar 26, and since this collar is adjustable on the cylinder I9 the depth of the stroke of the plunger can be regulated in an obvious manner.

The plunger I1 is fixed in the bearing I3 by a set screw 46. v

The bracket I5 is connected with the link 41 slidable in guides 48 carried by the standard *2, the upward movement of the bracket being limited by a wheeled screw 49 mounted on the upper end of said standard, as clearly shown in Figure 2.

A foot treadle 50 is pivotally connected with the lower end of the standard for controlling the movement of the bracket I5 and its associated elements.

The link 41 is yieldably connected to the platform 3 by a coil spring 51 which serves to return the bracket I5, through the medium of the link to its uppermost position upon release of the treadle 50.

Briefly the operation is as follows:

The armature 6 is placed in the cradle 5 with its lowermost slot engaged with the rib 9 in order that its uppermost slot will be in alinement with the plate I8. The nut 32 is adjusted on the rod 29 to a position to cut the rope ID to lengths corresponding to the lengths of the armature slots I. The rope I0 is moved over the slot of the armature by moving the handle 35 to the left and in this manner the

bars

28 and 29 correspondingly moved. Upon the handle 35 contacting the bar 2'! a predetermined length of rope is positioned over the uppermost slot 8 of the armature, the rope being fed by the dog 44, the dog 43 serving to prevent reverse movement of said rope. Obviously movement of the handle 35 also moves the cross head 30 on which the dog 44 is pivotally mounted to grip the rope to feed the same a predetermined distance, it being of course understood that the bar 28 is also moved.

After the proper length of rope is fed over the slot the treadle 59 is actuated to move the bracket I5, and thus the plunger 'I'I downwardly where= upon the pin 22 in its downward travel rocks the levers 36, thus causing the blades 38 to cut the rope so that a proper length thereof will be positioned over the slot. Continued downward movement of the plunger will cause the blade I8 to force the length of rope into the slots of the armature with a wedging action, and since the rope is somewhat resilient it will pass through the restricted throats of the slots and then expand under the action of the blade I8.

It will be understood that the spring 3| will be placed under tension when the handle 35 is moved to the left, and will act to return the rod 28, and thus the rod 29 and associated parts to the posi tion as shown in Figures '7 and 8.

After one slot has been filled with a section of the rope it is only necessary to lift the armature to free the lowermost slot from the rib 9 and upon turning the same the slots thereof will be successively alined with the blade I3.

What is claimed is:

1. In an armature wedging machine, a plunger mounted for vertical reciprocating movement over an armature holder, a sleeve about the lower portion of said plunger slidable vertically thereon and urged downwardly, a block at the lower end of said sleeve and formed with a longitudinally extending vertically disposed slot for receiving a length of rope to be forced into coil-receiving recesses of an armature, a plate carried by the lower end of said plunger and operating in the slot of said block for forcing rope downwardly into a recess of an armature when the plunger is shifted downwardly, levers at one end of the block disposed vertically and pivotally mounted and having blades at their lower ends moved towards each other from opposite sides of the slot for cutting engagement with a rope when upper ends of the levers are moved away from each other, confronting side edges of said levers having cam surfaces, and a pin extending laterally from said plunger through a vertically extending slot in the sleeve and between the levers for engaging the cam surfaces and moving the levers in a cutting direction as the plunger is shifted downwardly to bring the blade in engagement with a rope in the slot of the block and force the rope into recesses of an armature.

2. In an armature wedging machine, a plunger mounted for vertical reciprocating movement over an armature holder, a sleeve about the lower portion of said plunger slidable vertically thereon and urged downwardly, a block at the lower end of said sleeve and formed with a longitudinally extending vertically disposed slot for receiving a length of rope to be forced into coil-receiving recesses of an armature, a plate carried by the lower end of said plunger and operating in the slot of said block for forcing rope downwardly into a recess of an armature when the plunger is shifted downwardly, a cutter movably mounted at one end of said block, and movable into and out of position for severing a length of rope in the slot of the block from a supply of rope, and a pin extending laterally from said plunger and having engagement with the cutter to impart severing movement thereto as the plunger is moved downwardly- 3. In an armature wedging machine, a plunger mounted for vertical reciprocating movement over an armature holder, a sleeve about the lower portion of said plunger slidable vertically thereon and urged downwardly, a block at the lower end of said sleeve and formed with a longitudinally extending vertically disposed slot for receving a length of rope to be forced into coil-receiving recesses of an armature, a plate carried by the lower end of said plunger and operating in the slot of said block for forcing rope downwardly into a recess of an armature when the plunger is shifted downwardly, a cutter movably mounted at one end of said block, adapted to be moved in a severing direction during downward movement of the plunger, rods slidable longitudinally of said block, a cross bar carried by said rods, a rope gripper carried by said cross bars, a cross bar carried by said block, a rope gripper carried by the second cross bar, a spring yieldably resistin movement of the rods longitudinally in a direction for feeding rope through the slot of said block, and an adjustable stop carried by one rod for limiting movement of the rods by said spring.

4. In an armature wedging machine, a plunger mounted for vertical reciprocating movement over an armature holder, a sleeve about the lower portion of said plunger slidable vertically thereon and urged downwardly, a block at the lower end of said sleeve and formed with a longitudinally extending vertically disposed slot for receiving a length of rope to be forced into coil-receiving recesses of an armature, a plate carried by the lower end of said plunger and operating in the slot of said block for forcing rope downwardly into a recess of an armature when the plunger is shifted downwardly, a. cutter movably mounted at one end of said block, adapted to be moved in a severing direction during downward movement of the plunger, and a rope feeder consisting of rods slidable longitudinally of the block, cross bars carried by said block across ends thereof and through which said rods slidably pass, a cross head connecting said rods, rope grippers carried by the cross head and the cross bar at the adjacent end of the block, a handle for sliding the feeder longitudinally and moving rope through the slot of the block, a spring connected with one red for returning the feeder to its normal position, and a nut threaded upon the 20 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 788,969 Walker May 2, 1905 1,479,248 Moore Jan. 1, 1924 1,721,037 Poole July 16, 1929 1,949,739 Eaton Mar. 6, 1934 2,305,273 Poole et al Dec. 15, 1942 2,339,884 Sohlumpf Jan. 25, 1944