US2080318A - Wringer - Google Patents

Description

May l1,11937. w. KAUFFMN, 2D 2,080,318

WRINGER Filed July ll, 1252 V NTOR.

A TTORNEYS.

Patented May 11, 1937 UNITED STATES PATENT OFFIE.

WRINGER Application July 1l, 1932, Serial No. 621,918

Claims.

With power wringers it is desirable to supply them with a safety release. The principal purpose of the release is to relieve the pressure on the rolls` in the event that an operator has a f hand caught in the rolls. Under these conditions the operator is more or less agitated and it is, therefore, desirable to make the releasing devices releasing the pressure on the rolls as responsive to action of the operator as possible and at the same time sensitive. 'On the other hand, it is` necessary or desirable to have the re lease so located in normal running that it will not be ordinarily accidentally actuated. The present invention is designed to improve safety release devices of wringers, particularly to accomplish the desirable manner of operation above suggested. Features and details of the invention will appear from the specification and claims.

A preferred embodiment of the invention is illustrated in the accompanying drawing as follows:-

Fig. 1 shows a front elevation of a wringer, partly in section.

Fig. 2 a bottom View of the release lever.

Fig. 3 a perspective View of a. latch.

Fig. 4 an elevation of the end of the top rail.

Fig. 5 an elevation of the releasing mechanism, partly in section.

Fig. 6` a section on the line 6 6 in Fig. 5,

I marks the base of the wringer frame, and 2 the side stiles. These side Stiles are ordinarily made of sheet metal and are box-shaped. 3 marks the lower roll and 4 the upper roll. These are provided with roll shafts 5 and 6 which operate in bearings 'I and 8. The inner wall of the stile is slotted to permit of `the extension of the shafts 5 and 6 into the stile and into position on the journal surfaces of the bearing blocks. A 40 top rail IU is preferably channel shaped and extends over the top of the side stiles. A pressure spring II extends through the slots 9 and engages the upper ends of the upper bearing blocks 8. The spring is adjusted by a screw I2 arranged on the top bar.

A shoulder I2a is struck up in the outer face i of the upper end of the stile. `A lip I3 is struck out of the end of the top rail forming a shoulder I4 which engages the shoulder I2a. These shoulders form a locking engagement of this end of the top rail and form a hinge for the initial movement of the top rail as the opposite end is released.

A releasing lever I5 has downwardly extending ilanges I6 which straddle the end of the top rail.

These flanges have inturned lips II with pivot extensions I8, the extensions I8 extending through perforations I9 in the sides of the top rail. These perforations, it will be observed, are triangular in shape, the pivot being formed at the apex of the triangle toward the center of the bar and the flaring opening permitting a limited pivotal movement of the pivot extension I8 in this perforation, the perforation forming a stop limiting the ultimate movement. A latch member 2Q is U-shaped having plates at each side of the wringer, these plates being connected by a cross plate 2|. The side plates have perforations. 22 through which pivot lugs 23 struck up in the sides of the side Stiles extend. Here again the opening is triangular shaped and the lugs operate on one of the apexes of the triangle, the aring of the opposite side permitting the desired amount of movement and forming a stop limiting the ultimate movement. The latch plates have catch surfaces 24 which are adapted to 'engage the lips, or catch-engaging surfaces I'I of the lever I5. It will be noted that the portion of the lip II engaged by the catch surfaces 24 is practically at right angles to a 2 radial line from the pivot so that normally there is no tendency for the latch to unhook.

In order to prevent the accidental release, that is, a release Without the operation of the lever I5 a locking shoulder 25 is provided on the side plates 20 of the catch member and this shoulder engages the outer edge of the lip Il and thus prevents a releasing movement of the catch member 20 so long as the lever I5 is in its normal position.

vA spring 26 engages the top of the top rail and the underside of the lever and is held in place by a shoulder 2l struck up in the top rail and the head of a rivet 21a on the lever.

A handle 28 is secured by the rivet 21m to the lever. On a downward movement the handle is practically rigid. so far as movement relatively to the lever is concerned, but the handle 28 is free toy swing toward the front, or back, on the pivot 21a. The handle 28 is channel-shaped and has the downwardly extending ilange 29 at its outer end. This ange has a double cam 30 formed on its outer face. This cam engages a shoulder 3| struck up in the top bar.

With the parts in locked position, as shown in Fig. 5, should the lever handle 28 be depressed, the lip I'I is lifted releasing the shoulder 25 and at the same time the surface engaged by the hook 24 is inclined so that the hook slips off this surface and releases the top rail. The top rail under the pressure of the spring swings upwardly on the pivot formed by the shoulders ifi and Iza. Should the operator strike the handle 28 so as to force it sidewise, either front or back, the cam 30 acting on the shoulder 3l forces the upper part of the lever I5 toward the right on the pivot I8 and this raises the lip Il and operates the release in the same manner as when the lever is directly struck downwardly. Under normal conditions the double cam 30 yieldingly holds the handle in its direct central position.

It will be noted that with this structure, if the operator strikes the handle 28 downwardly, or forwardly, or pulls it, it will result in a release. On the other hand, the structure is securely locked gainst accidental release. The surfaces of the latch mechanism while stable in normal position present very little resistance to a tilting movement in as much as these surfaces are practically at the pivot of the lever so that as soon as the surface of the lip Il is tilted slightly the hook slides oif the lip and completes the release. This makes a very sensitive releasing mechanism requiring very little force to start the release, the completion of the release being effected by the force of the spring itself.

What I claim as new. isz- 1. In a wringer, the combination of a frame; rolls mounted in the frame; pressure mechanism for the rolls; a safety release device releasing pressure on the rolls; a lever operating the release device; and a handle connected with the lever, the connection being rigid with and actuating the lever directly under thrust in one direction and movable relatively to the lever under thrust in a different direction and actuating the lever through said relative movement.

2. In a wringer, the combination of a frame; rolls mounted in the frame; pressure mechanism for the rolls; a safety release device releasing pressure on the rolls; a lever operating the release device; and a handle pivoted and secured on the lever and actuating the lever by a movement in a plane intersecting the axis of the lever and actuating the lever through relative movement when swung on its pivot.

3. In a wringer, the combination of a frame; rolls mounted in the frame; pressure mechanism for the rolls; a safety release device releasing pressure on the rolls; a lever operating the release device; a handle pivoted and secured on the lever and actuating the lever by movement in a plane intersecting the axis of the lever; and means engaged by the handle when swung on the lever and operating with the handle to actuate the lever.

4. In a wringer, the combination of a frame; rolls mounted in the frame; pressure mechanism for the rolls; a safety release device releasing pressure on the rolls; a lever operating the release device; a handle pivoted and secured on the lever and Aactuating the` lever by a movement in a plane intersecting the axis of the lever, said handle having a cam movable as the handle is swung on its pivot; and means engaging the cam and cooperating with the handle to move the lever when the handle is swung on its pivot.

5. In a wringer, the combination of a frame; rolls mounted in the frame; pressure mechanism for the rolls; a safety release device releasing pressure on the rolls; a lever operating the release device; a handle pivoted and secured on the lever, and said handle having a downwardly extending flange with a double cam in its end, said handle being adapted to swing the lever by thrust in a plane intersecting the axis of the lever; and means engaging the cam as the handle is swung to actuate the lever.

6. In a wringer, the combination of a frame; rolls mounted in the frame; a top bar; pressure mechanism for the rolls operating from the top har; a safety release device involving a releasing connection between the top bar and the frame; a catch pivoted to the frame having hooks; a release lever pivoted on the top bar and having engaging surfaces engaging the hooks; and a handle pivotally mounted on the lever and extending from the top bar, the operation of the lever tilting the engaging surface to release the hook.

7. In a Wringer, the combination of a frame; rolls mounted in the frame; a top bar; pressure mechanism for the rolls operating from the tcp bar; a safety release device involving a releasing connection between the top bar and the frame; a f

catch pivoted to the frame having hooks; a release lever pivoted on the top bar and having engaging surfaces engaging the hooks; a handle pivotally mounted on the lever and extending over the top bar, the operation of the lever tilting the engaging surface to release the hook; and interlocking means between the catch and the lever preventing the release of the hook.

8. In a wringer, the combination of a frame;

rolls mounted in the frame; a top bar; pressure mechanism for the rolls operating from the top bar; a safety release device involving a releasing connection between the top bar and the frame; a catch pivoted to the frame having hooks; a release lever pivoted on the top bar and having engaging surfaces engaging the hooks, the operation of the lever tilting the engaging surface to release the hook; and a locking device actuated by the lever normally locking the catch against accidental disengagement.

9. In a wringer, the combination of a frame; rolls mounted in the frame; a top bar; pressure mechanism for the rolls operating from the top bar; a safety release device involving a release connection between the top bar and the frame; a catch pivoted to the frame having hooks; and a release lever pivoted on the top bar and having downwardly extending anges with an inturned lip having a pivot extension on the inturned lip and an engaging surface for the hook, said engaging surface being tiltable to release the hook and a 'shoulder on the catch engaging the inturned lip to lock the hook against accidental disengagement.

li). In a wringer, the combination of a frame; rolls mounted in the frame; pressure mechanism for the rolls; a safety release device releasing pressure on the rolls; a swinging latch member; a swinging catch member, said catch and latch members having engaging surfaces tiltable relatively to each other to effect the release; and a locking device normally locking one of said members against disengaging movement.

WALTER L. KAUFFMAN, II.

Images