US2206302A - Wringer roll stop mechanism - Google Patents

Description

July 2, 1940; v DUNN 2,206,302

WRINGER ROLL STOP MECHANISM Filed Jan. 2, 1937 4 Sheets-Sheet 1 IAfNTgR.

ATTORNEYS.

July 2 1940. v. E. DUNN WRINGSR ROLL STOP IECHANISH 4 Sheets-Sheet 2 Filed Jan. 2, 1937 INgNTOR. P

ATTORNEYS.

y 1940. v. E. DUNN WRINGER ROLL STD? MECHANISM 4 Sheets-Sheet 3 Filed Jan. 2, 1937 1. rll IV Illa I'll; 9 A r INVENEUR ATTURNEYE.

July 2, 1940. v N 2,206,302

WBINGER ROLL STOP MECHANISM Filed-Jan. 2, 1937 4 Sheets-Sheet 4 IN'V' ENTER AITEIENEYEL.

Patented July 2, 1940 UNITED STATES PATENT OFFICE Thisinvention relatespto wringers for domestic washing machines. and particularly to that part ofthe wringer mechanismwhich stops rotation of the .rol1s when pressure is ease Experience with domestic Wringers has proven.

that, when accidents occur, it is highly desirable to stop-rotation of the rolls because continued rotation causesjserious damage to garments and more serious injuries to the operator, when caught. 1 v u The particular object of this invention. is to provide mechanism coactingwith the roll pres.- sure means whereby rotation of i the rolls is stopped when roll pressure is released. Another object is to provide a roll stop mecha nism. almost wholly contained in the gear head of the wringer so as to make possible. the application ofthis mechanism to other kinds and types of wringers. u a a Other objects and benefits will be disclosed in the following description and drawings in which: Fig. l is a front elevation of a wringer embody ing my roll stop mechanism with one end of the f wringer case and most of the wringer head broken away to the longitudinal center line to better disclose the arrangement of the interior parts; Fig. 2 isa sectionalend elevation view on the section lines 2--2, Fig. .1, showing the pressure handle in released positioninits relation with the clutch cam and cam dog in stopped. position. Fig. 3 is a sectional end elevation View onthe sectionlines 2-2, Fig. 1, the same as Fig. 2, except that the pressurehandle is now in pressure application position and the clutch cam ha 35 been forced into engaged position.

Fig. 4. is a partial sectional; end elevation view on the section line 4 4, Fig. 1, showing the rolls and pressure mechanism in pressure relation;

Fig. 5 is a similar sectional endelevation view, the same as Fig. 4 except. that the rolls and mechanism are in released relation but ready to apply roll pressure corresponding to Fig. 3; i

Fig. 6 is a broken cross sectional side elevation of the full plate and tapered point lock bar as shown in position of Fig. 4;

Fig. 7 is an enlarged side elevation, partially in cross section, showing the arrangement of the dog latch and cam arm in locked relation;

Fig. 8 is the same view as Fig. 7 except that it shows the dog latch moved out of latching engagement with the cam arm by upward movement of the wringer roll and slotted bearing bracket;

Fig. 9 is a broken, side elevation view of the wringer and head with exterior parts broken away to show theresultant action of the mechanism when the upper roll has been released upward, the driven gear disengaged and the roll stopped; Fig. 10 is an enlarged detailed cross sectional view of the drive mechanism between the roll and bevel gear showing the parts in drive relation;

Fig ll is a similar view to Fig. 10 showing the drive gear disengaged and the roll stopped; and

Fig. 12 is a small broken back elevation view of the wringer head showing the pressure handle in relation to the pressure shaft.

Now referring to Fig. 1, I designate the main frame of the wringer by the numeral if]. It will be noted that the wringer frame and head are integral, a sub-head gear case 15 being mounted in the head portion of the combined wringer frame and head I0.

The top frame ll, carrying bearing bosses 22 for the upper roll [3, has a conventional release mechanism I 4 retracting tapered latch bars 25 and is slidable vertically in the mainframe Ill. The lower frame In carries the lower roll i2 by stationary bearings, one cast in portion Iii located in outside end of wringer and one located in cast portion it of frame I 0 between'the end of the roll l2 and the drive mechanism. Bearing bracket 36 houses cams M and 42, as well as drive tube 31. Bracket 36 and sub-gear case are bolted together as shown in Fig. l with round .head

screws. This assembly is then boltedto Ill with four screws a, Fig. l. is shown. Attached to the lever 28 are end. plates 2i held Only one of the screws in vertical alignment by the guide block Ill" and the slotted opening 32 about the shoulder rivet 32. See Fig. 4.

These end plates are attachable to the top frame by means of the tapered end latch bars 21!), the tapers 20 on the bars bearing in the taper faces 33 of the slot 33. See Fig. 6.

The sub-gear case head l5 mounts the vertical drive shaft l5 which has a conventional reversible drive mechanism including the clutch pinions I! and is rotatably mounted on the drive shaft and a clutch member l6 slidably keyed to the shaft. r

The handle 49 through conventional mechanism controls the forward, reverse and neutral positions of the clutch I6.

The driven gear [9 departs from conventional r the sleeve drives the roll l2 through the pin l2 as shown.

A spring 39 is tensioned between the pin 38 and a button 4|) to urge the gear I9 out of mesh with the gears and I8.

Interposed between the gear I9 and the cam 4| is a mating cam 42 slidably keyed to the cap 36 by dual key bosses 42' in the slots 36'. When the cam 4| is rotated the cams ride up on their incline faces and abut each other on the flat points of the cam faces forcing the gear l9 into driving relation with the gears l! and I8 as shown in Fig. 1. Reverse rotation of the cam 4| allows them to mesh with each other and permits the gear l9 to be drawn out of mesh as shown in Fig. 9.

Now referring to Figs. 2, 3, 4 and 5, a handle 26 is pinned to a horizontal crank shaft 21 extending longitudinally and pivotally mounted in the wringer frame Ill. The handle 26 has a lever lip 26 on its inner end adapted to contact the cam arm 4| of the cam 4| and rotate it to engaged position as shown in Figs. 2 and 3. It will also be noted that the dog 23 is actuated behind the vertical face of the cam wing 4| to lock cam 4| in operating position as shown in Fig. 3.

The action of spring 25 to rotate cam 4| into stopped position is well illustrated in Figs. Band Now referring to Figs. l, 5 and 6, the crank portions 21' of the shaft 2'! are shown as they engage in slots 28 of ,dual lever member 28 pivoted on pins 29 in the end plates 2|. The opposite ends of the levers 28 bearagainst spring plugs 30 by the adjustable set screws 29 and are urged downward by compression springs 3| mounted in each end of the wringer.

Referring to Figs. 3 and 5, the handle 26 has been pulled down, the cam 4| rotated into locked operating position, the end plates 2| have been lifted up until the latch bars 20 have engaged their tapered ends 20 into contact with the taper faces 33 of the slots 33 by means of movement of the levers 28 by the cranks 27 in the slots 28. Now, by pulling the handle 26 upward, the crank 21' pulls down the 'top frame H and the roll l3 against the roll |2 by reaction of the set screw 29 against the plug 3|) and the spring 3| and we have the rolls in pressure relation as shown in Fig. 4. 1

It will readily be understood that when the pressure release mechanism is actuated, the lock bars 20 will be readily retractable because of the tapercontacts to release the end plates 2| allowing the upper frame and roll to move upward into releasedposition.

Now referring to Figs. '7 and 8, it will be noted that the roll I2 is restricted to a low position and from shifting sidewise by the rivet 2| as shown in Fig. '7. In this position the slot 22' 'in the bearing block 22 has forced the tail of the 4 dog 23 behind the fan arm of the cam 4|l which retains the driving gears in mesh. However;

when the roll pressure is released and the roll I2 moves upward as shown in Fig. 8, the upward movement of the slot 22' with the spring 24,

pivots the dog 23 in its mounting 23' which releases the tail from behind the fan arm 4| which permits the spring 25, as shown in Figs. 2 and 3, to rotate the cam 4| permitting the spring 39 as shown in Figs. 11 and 12 to pull the gear l9 out of mesh with the gears I1 and I8, thus stopping the rolls.

Operation Having thus described the parts and their relation' to each other, I will now describe'the operation of my .roll stop mechanism.

Assuming the wringer in operation, as-shown in Fig. l, the roll pressure is instantly released by the operators touching the release target l4 which retracts the lock bars 20 permitting the top frame and roll to move upward to release position.

The upward movement of the roll bearing bracket 22 actuates the dog 23 into release position permitting the cam 4| to be rotated into position to mesh with cam 42 and allowing the driven gear l9 to be withdrawn from driven relationship with the horizontal wringer head gears. Thus the rotation of the rolls is stopped with release of pressure.

The wringer is again put in operating condition byholding the top frame down while the hand lever 26 is depressed. This raises the end plates 2| which re-engages the lock bars 20 into locked relation with the end plates. The hand lever 26 is now raised and this pulls down the top frame and top roll into locked pressure contact with the lower roll through rotation of the cranks 21' which pivots the levers 28 against the springs 3|.

Simultaneously with the above operation the pressure lever 26 by contact of the lever arm 26' with cam'arm 4| has rotated the cam 4| to cause the drivegears to be meshed in driving relation and the downward movement of the bearing block. 22 has forced the 'dog 23 into holding position behind the fan arm of 4|. Thus the rolls are in pressure relation and the wringer is in operating position.

The foregoing will, I believe, completely disclose my roll stop mechanism. I have shown and described a preferred embodiment of my invention. HoweverI do not desire to belimited to the structure shownexcept by the claim thereon.

I new claim as new:

In a power driven clothes wringer, a manually reversible gear head, lower and upper frames, a pair of cooperative pressure rolls in the lower frame, pressure springs in the lower frame, bail means for joining the frames together in pressure sustaining relationship, lever means in the lower frame coacting with said springs and bail to create roll pressure, safety release mechanism in the upper frame to unhook bail and release roll pressure, cam means co-axial with the driven gear to slide said gear into or out of engagement with the reversing gears in the head and cam latch means on the bail operable by upward release movement of the upper roll to permit reverse movement of the cam and disengagement of the gear to stop rotation of the rolls.

I VERNON E. DUNN.

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