US2281886A - Roll stop mechanism - Google Patents

Description

. 5 MW M Ru ai 3 mm M 7 4 M 2 m 4. I. IF U a m 4A 7 E r q 3 M 4 M 62 7 l 3 w 6, 7% 3 3 W w 0 9 .2 M 2 s n. F 2 I .I I 3 w 0 2 PH 3 0W m U r M a w 7/ BY i DRHEY Patented May 5, 1942 ROLL STOP MECHANISM Helmuth A. Schultze, Syracuse, N. Y., assignor to Easy Washing Machine Corporation, Syracuse, N. Y., a corporation of Delaware Application September 15, 1939, Serial No. 295,103

8 Claims.

My invention relates to improvement in emergency roll stop mechanism designed primarily for use in connection with washing machine wringers.

In operating a washing machine clothes wringer which is power driven, there is considerable danger of accident which may arise when the operators hand, hair or clothing is drawn into the revolving rolls. When such an accident occurs, in order to prevent injury to the operator, not only must the pressure between the rolls be released but the rolls must be stopped. This is especially necessary if the operators hair is caught and wound around the rolls. In such a case, simply releasing the roll pressure is often insufficient to avoid injury because the hair being wound around the r011 is not released and the continued revolution of the roll will cause damage.

The object of my invention is to provide a simple, inexpensive but effective roll stop mechanism which is adapted to be operated in conjunction with the emergency roll pressure releasing device.

Other objects and advantages of my invention will become apparent from the following description when taken in conjunction with the accompanying drawing, in which:

Figure 1 is a front elevation of a power operated clothes wringer.

Figure 2 is a detail vertical sectional view, parts being broken away, of the wringer illustrated in Figure 1.

Figure 3 is a horizontal section taken on the line 33 of Figure 2.

Figure 4 is a view of the camming disk taken on the line 4-4 of Figure 2.

Figure 5 is a detail view taken on the line 5-5 of Figure 4.

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

Referring now to the drawing, H3 is a power driven clothes wringer of a type well known in the art. II is the Wringer frame carrying a movable head I2 which is pivoted to the frame I by means of pin l3. A locking device. I 4 is provided at the opposite end of the head l2 and normally holds the head |2 in the closed position. A striking bar I5 is connected by suitable means to the lock |4 so that when the bar I5 is struck the lock is released and the head is free to pivot about the pin l3.

The wringer is provided with two rolls 2!! and 2|. The lower roll 2| is power driven bymechanism presently to be described, the upper roll 20 camming disk taken being driven by the lower roll 2|. A semi-elliptic spring 22 is positioned with its ends resting on the upper roll bearings 23 which are free to slide vertically in ways provided in the frame I The center of spring 22 bears against the tensioning device 24 which is supported in the movable head |2.

The lower roll 2| is provided with journals 25 and 26. The journal 25 is supported on a bearing 21 which in turn is supported on pin 21 permanently fastened in hanger 28, which is pivotally mounted in the frame by'means of pin 29. A stop 36 is provided to limit the downward movement of the hanger 28. The hanger 28 is provided with thrust portion 3| which normally engages with the end of journal 25 and restricts longitudinal movement of roll 2| when the movable head I2 is locked in the operative position and the upper roll is bearingon the lower roll 2|.

The pivot 29 is located in the hanger 28 eccentrically with reference to the bearing 21 so that pressure downward on the bearing 21 will tend to rotatethe hanger 28 downward and bring the thrust portion 3| against the end of journal and force the roll 2| to the right until movement of the hanger is arrested by the stop 30. The journal 26 is supported on bearing which in turn is supported in the hanger 36, The hanger 36 ispivotally'mounted to the frame I I by means of pin 31.

The wringerreverse mechanism is of the conventional bevel gear type well known in the art. 40 is a gear case in which a power shaft 4| is suitably journaled, as at 42. Bevel gears 43 and 44 are loosely mounted on the shaft 4|. The

wringer drive bevel gear 45 is provided with a hollow stub shaft 46 journaled in casing 45, as at 41. The hollow stub shaft 46 is provided with a pair of internal ears 48, Gears 43, 44 and 45 are constantly in mesh. A universal joint comprising a short, hollow tube 50 is slotted at one end to receive the ears 48 and at the opposite end to receive a drive pin 5| which is rigidly mounted in and adjacent to the end of the journal 26. A clutch splined to shaft 4| is normally held in a neutral position when the wringer is not in use and is adapted to engage either gear 43 or gear 44 to drive the roll 2| in one direction or the other. The clutch 55 is provided with a circumferential recess 56 which is adapted to cooperate with a cam roller 60.

A camming disk 6| is formed with a'central boss 62 which is journaled in the frame 40, as at 63. A square extension 64 is provided at the outer end of the boss 62, said extension 54 being adapted to fit in a socket in the operating handle 65 and is secured therein by means of pin 65. The inner surface of the camming disk BI is provided with an annular recess 6?. A lug 68 is formed projecting inwardly of the annular recess 61. A coil spring 69 is fitted into the an nular recess 87 with the ends of said spring bearing upon lug 63, Figure 6. A stop pin Hi rigidly fastened in frame til so as to project into the annular recess 51 is adapted to engage either end of spring 69 when the camming disk 6| is rotated.

The cam roller to is mounted eccentrically on the outer surface of camming disk 6| and is located ofi center on a diameter which is 90 to the diameter through the center of lug 68. A shallow recess 1| of a width slightly less than the diameter of the cam roller 6|] extends across the outer face of the camming disk 6|. The center line of recess H is'located parallel to the diameter passing through the center of lug 68 and passes through the center of the cam roller 60. The sides of the recess H slope outwardly so that the recess is wider at the top than at the bottom.

A saddle member 75 adapted to fit in the circumferential recess 5t of the clutch member 55 is provided with ends 76 and Ti which normally 7 bear upon the outer face of the camming disk 6|. The upper and lower surfaces of the ends 16 and 17 are chamfered off at an angle complementary to the angle of the slope of the sides of the groove H. At the center of saddle member a fiat face it is provided. A push rod 80 is provided with an enlarged end BI and is loosely mounted in an aperture 82 provided in the center of gear 4 5. The enlarged end 3| of push rod 89 is adapted to cooperate with the fiat face 73 of the saddle piece Iii. A strong coil spring 98 is loosely mounted inside the universal joint 53.

'Buttons 9| and 92 are mounted in the ends of spring 93 and are adapted to bear against the end of journal 26 and push rod 80, respectively.

down upon roll 2|. When'roll 2| is forced downward, hanger 28 is swung downward about its pivot 29 against the stop 3|]. The thrust portion 3| pushes on the end of journal and moves roll 2| and journal 26 to the right. The end of journal 26 compresses the spring 99 which exerts a force on the push rod 80 which in turn forces the ends '55 and ll of the saddle member 15 against the camming disk 6|.--

To start the rolls operating,- the handle 65 may be swung backward through an arc of approximately 90. The movement of the handle 65 moves the camming disk 6|. The spring 69 is brought in contact with the stop pin 70 which compresses the spring against the lug 68. The rotation of the camming disk moves the cam 63 which in turn lifts the clutch piece into cooperative engagement with the gear 43. At the same time, the saddle piece 15 is carried upward with the clutch piece 55 and when the recess 1| is brought to the dotted position shown in Figure 4 the ends it and H of the saddle l5 are forced into the recess 1 i through the action of the push rod 8|] and the spring 98. The ends l6 and i1 Pressure is 0 thus exerted on the bearings 23 which'force roll thus catch and hold the camming disk 6| in the operative position. Upon striking the striking bar l5, the locking device I4 is released, the head l2 rises and release the pressure exerted on the rolls through the spring 22 thus leaving rolls 2E and 2| free to rise. The spring 90 pushing against the end of journal 26 forces roll 2| and journal 25 to the left. The end of journal 25 bearin against the thrust piece 3| of the hanger 28 rotates the hanger to the left, thus releasing the spring pressure 90 against the push rod and the saddle piece 15.

When the ends 16 and T! are no longer pressed against the camming disk 6|, the compressed spring 69, one end of which is hearing against the stop pin 10, the other end bearing against the lug 68, forces the camming disk to rotate throwing the ends 15 and H out of the recess H and brings the camming disk back to the neutral position which, through the action of the cam roller 60, moves the clutch piece 55 out of engagement with the gear 63, thus stopping the roll.

It is understood that the handle 65 may be rotated either forward or backward to engage the clutch piece 55 with either of the gears 43 or 42 to rotate the rolls in one direction or the other. The operation of the releasing mechanism will be the same in either case except the cam roller 60 will be moved either above or below the center of rotation of the camming disk 6|.

It will be understood that various changes and modifications may be made in the various parts of my device without departing from the spirit of my invention, for although I have shown a specific form and relation of parts as an exemplification of an embodiment of my invention, I do not desire to restrict myself to the exact size, shape or arrangement of parts as various changes may be made within the scope of the appended claims.

I claim:

1. In a power driven wringer having a pair of rolls, means for maintaining pressure between said rolls and an emergency device for releasing said pressure, the combination of a clutch for transmitting power to rotate said rolls, clutch operating means including a cam, a handle rigidly connected with said cam, a spring adapted to yieldingly hold said cam in a neutral position and to return said cam to said neutral position when displaced therefrom, releasable holding means including a latch, a spring for loading said latch, a notch in said cam so positioned and arranged as to cooperate with said latch to hold said clutch in an operating position, and means associated with one of said rolls for releasing said spring load on said latch when said pressure between said rolls is released.

2. The combination as described in claim 1 wherein said last mentioned means includes a pair of movable hangers so constructed and arranged as to permit longitudinal and vertical movement of said roll when said pressure between said rolls is applied or released and a push rod associated with said roll and said latch spring so constructed and arranged as to load said latch when said roll is moved downward and inward when said pressure is maintained between said rolls and to unload said latch when said pressure is released and said roll is free to move I upward and outward.

3. The combination as described in claim 1 wherein said latch comprises a bifurcated member carried by and movable with said clutch.

4. The combination as described in claim 1 wherein said cam comprises a disc, means in cluding a central boss for mounting said disc, a cam roller mounted eccentrically of the center of rotation of said disc on the face opposite said boss, and a notch formed in the face of said disc adapted to cooperate with said latch.

5. In a device of the class described, the combination of a train of reversing gears, a clutch associated with said train adapted to cooperate with said train to obtain forward and reverse movement through said train, clutch operating means including a cam, means including a spring for yieldingly maintaining said cam in a neutral position, a handle rigidly connected with said cam for moving said cam from a neutral to a forward or reverse position, releasable holding means associated with said cam adapted releasably to maintain said cam in both forward and reverse positions, said holding means including a bifurcated saddle piece carried on said clutch and movable therewith, the bifurcated ends of said saddle piece being positioned to bear against the face of said cam, a spring so constructed and arranged as yieldingly to maintain said saddle piece in contact with said cam, and a recess located in the face of said cam adapted to receive said ends of said saddle piece when said cam is moved to either forward or reverse position, said releasable holding means including a push rod for releasing said holding means.

6. A roll stop mechanism for a power wringer having a clutch member and a manual control for operating said clutch, comprising separate power means for constantly urging said control to a neutral position, a latch member directly engaging a part of said control for holding said control in an operative position, a spring associated with said latch member normally tensioned to maintain said latch member in engagement with said control, and independent means for releasing said latch spring tension, whereby said separate power means returns said control to the neutral position.

'7. A device as described in claim 6 wherein said independent means includes a roll pressure release mechanism.

8. A roll stop mechanism for a wringer having a bevel gear reverse drive including a clutch member adapted to engage either the forward or reverse gear or to be disengaged from both gears and a manual control mechanism for moving said clutch member into engagement with either of said gears or into a neutral position, compris ing a spring connected with said manual control mechanism for constantly urging said control mechanism to a neutral position, holding means directly connected with said control mechanism to move therewith, a latch member for yieldingly engaging said holding means in either the forward or reverse drive position of said control mechanism, a second spring associated with said latch for urging said latch into cooperative relation with said holding means, and independent means for releasing said latch spring tension, said control mechanism holding means and latch member being so constructed and arranged that upon release of said latch spring tension, said first spring forces said latch member out of holding relationship with said holding means and automatically returns said control mechanism to said neutral position.

HELMUTH A. SCHULTZE.

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