Патент USA US2134779код для вставки
www L Ew@ l ’ W. Q_ F METZ ' SAFETY DEVICE FOR CLOTHES WBINGEÉS Filed March lO, 1933 ,1R/LTT@ Patented Nov. 1, 1938 2,134,779 UNITED STATES> PATENT OFFICE'.4 2,134,779 SAFETY DEVICE FOR CLOTHES WRINGERS William C. F.' Dietz, Cincinnati, Ohio, assignor of one-half to Walter K. Voss, Davenport, Iowa Application March 10, 1933, Serial No. 660,282 9A Claims. This invention relates broadly to safety devices for po-wer driven- clothes wringers used. in con nection with washing machines and is more par--l ticularly directed to the arrangement of a switch i for breaking the electric circuit of the motor forming the prime mover for the wringer, should the operator be endangered by the operation of said wringer. Many types of power driven wringers now on ll) the market are provided with safety devices of which some are of the character whereby the top roller may be released or’disengaged from the bottom roller when the hand or clothes of the operator gets caught between the rolls. This re l lease of one of the rolls is sometimes sufficient to avoid an accident but as the bottom roll, which is usually the power roll and connected with the motor, continues to rotate, danger is still present in that should the hand or clothes of the op - erator get caught or become wrapped around the roll, serious injury may be the result. Itis therefore an object of the present inven tion to provide a safety device in the forml of a switch which has its controlling element lo~ i cated on the wringer, within convenient reach (Cl. (iS-253) present application, as I find that this construc tion isA particularly suitable for the operation of the switch and its operating means, comprising the present invention. It is understood however that this switch arrangement may be installed for operation on other types of wringers and when so installed, the switch may be operable from either side of the wringer. For a further understanding of the invention, reference is to be had to the following descrip~ tion taken in connection with the accompanying drawing wherein: ` Fig. 1 is a perspective view of a clothes washer and wringer showing the installation and loca tion of the switch comprising the present inven 15 tion; » Fig. Z is an enlarged fragmentary view of one end of the wringer showing more clearly the ar rangementV of the switch; ` Fig. 3 is a vertical sectional View taken on the line t--S of Fig. 2 showing the upper roll carry# ing frame in a position rocked to one side; Fig. 4 is a vertical sectional View taken through the switch structure. Fig. 5 is an end elevation of a wringer of the of the operator and operable to break the cir cuit ior the motor either independently of or si multaneously with the release or separation of >ordinary type showing the switch, forming a part of the present invention installed for operation in the rolls. Another object is to provide a simple safety device which does not require reconstruction or rearrangement of parts forming the wringer and associated mechanism but which may be installed for operation on any standard type of wringer. A further object of the invention is to provide Referring more particularly to the drawing, the a separable connection in the current carrying cable leading from the motor, usually located be low the clothes container of the washing machine, to the switch arranged on the wringer and to L20 which the present invention is directed in that said separable connection will act as a relief and prevent the breakage and damage of the cable, should the wringer head be swung or continuously rotated in one direction upon its mounting. The separable connectionv also permits the removal of the Wringer head from the washing machine for shipping purposes without dismantling any of the electrical equipment used in connection with the switch. 1 In a patent issued to me, June 7, 1930, bear ing No. 1,762,916, I show a wringer provided with a safety device whereby the upper rollv carry ing frame may be rocked to either side to separate the rolls. This type of wringer and safety de 55 vice has been used for an illustration, in the connection therewith. ì numeral I designates a conventional type of 30 washing machine equipped with a clothes wringer 2 driven and supported by mechanism 3 con nected for operation with a motor unit 4 usually located at the lower portion of the machine. The wringer 2 which has been specifically described in my aforementioned patent comprises a lower rigid frame 5 in which is positioned a roller i5 ro tated through the provision of the mechanism 3. Cooperating with the frame 5 and arranged thereabove is a second frame ‘l which is rockable to either side of the wringer and having its ends provided with bifurcated spring clips 8 positioned in seating engagement with spaced fulcrum pins 9 carried by the lower frame and which together with said clips provide a connection between the frames. Arranged on each side of the wringer is a releasing plate l0, pivoted to the lower frame 5 as at Il and provided with cam projections l2 „ engaging the spring clips S adjacent one pair of the pins 9. It will be seen that upon a slight downward pressure on the part of either of the plates IB the cam projections I2 thereof will force one of the bifurcated ends of the spring clips, situated at each end of the wringer, out wardly until they will disengage> from' one set of 65 2 2,134,779 pins 9 thereby releasing the frame 1 from one side of the wringer and due to the pressure of the roll tensioning spring I3, arranged in the upper frame, the lattery will be swung or pivoted on the other sets of pins 9 to a roll separating position, which swinging action of the frame has been illustrated by dotted lines in Fig. 3 of the drawing. As ther-eis located a release plate I0 on each side ofl thew?inger it will be understood 10 thatthe frame 1 'may be rocked to either side as is obvious. 15 The construction so far described to effect the disengagement of the upper frame 1 from the pivot pins 9 located nearest the oper ator. The released frame 1 is now free to swing on the oppositely located pivots, due to the action of the roll tensioning spring I3, and space the upper roll free from the lower power roll. This swinging action of the frame 1 will cause the arm 25 to disengage the upper end of the plunger 20, permitting the latter under the action of the spring 21 to be elevated thus breaking the circuit 10 established through the contacts I1 and the wash is that of the wringer shown in my prior patent er 2|. and therefore no claim is made thereto in this will be checked by the engagement of the insulat ing washer 22 with the upper sets of ñngers I8 of the contact members. It will thus be seen that 15 not only will the rolls be separated by the opera tion of a releasing plate I0 but this action will also effect the breaking of the circuit for the present case. Although the arrangement just described pre vents accidents in most cases, nevertheless, there have been instances where the separation of the rolls has not been sufficient to prevent injury to the operator as in the case where the operator’s 20 clothes have been caught or become entangled in clothes wrapped around the lower roll which is driven by the motor and continues to rotate al though the rolls are separated. It is therefore desirable to provide means, whereby the power may be shut off to the power driven roller, which means should be so located on the wringer as to be within the operator’s reach and so arranged as to require no appreciable thought on the part of the operator for its operation. The present in vention provides for such means which will now be described in detail. Connected in the current carrying leads I4 of the motor 4 and mounted upon the mechanism 3, is a switch designated generally by the numeral I5. This switch which is preferably of the push button type is attached in any suitable manner to the end frame of the wringer and located in a vertical plane drawn through the longitudinal axes of the rolls and arranged at one end thereof. 40 'I'he switch I5 which may be of any suitable size and design includes an insulating base I5 having mounted thereon a pair of spaced metallic con tacts I1 bent to provide upper and lower fingers I8 and I9 connected with current carrying leads I4, leading to the motor and a source of electrical 45 energy respectively of which the latter may be a house circuit (not shown). Positioned between the contacts I1 and arranged for vertical sliding movement is a plunger member 20 which is spring pressed and carries a metallic washer 2I for en gagement with the contact fingers I9 and ar ranged above this washer is a second washer 22 yet effect the circuit breaking operation of the switch. Also, upon restoring the tiltable frame to its wringing operating position, the switch will be automatically put in a position closing the circuit for the motor. In the form of the invention disclosed in Fig. 5, the switch 29 has been shown installed in connec tion with a wringer frame 3i! of the ordinary type 30 and instead of making use of the tiltable upper frame, as in the first form, for controlling the operation of the switch, bar members SI are ar ranged longitudinally of the rolls and mounted on each side thereof. The bar members are provided with end pieces 32 which have their intermediate portions thereof pivoted as at 33 to the end mein bers of the wrínger frame and their inner ends engaging or resting upon the upper end of the plunger 34 of the switch. The switch in this in 40 stance is of such construction that when the plunger thereof is in its normal elevated position, the circuit for the motor is closed. It will there fore be apparent that should the operator of the machine move either of the bars 3| in an inward 45 direction, this would depress the switch plunger and effect the opening of the motor circuit. is in a wringer operating position, the arm 25 will hold the plunger 20 depressed against the head is rotated one or more revolutions around action of a spring 21 so that contact is made be the upper end of the housing 36, wrapping the cable therearound, such pull will be in a substan Carried by one end of the upper wringer frame 1 is a plate 23 attached to the frame 1 by screws 55 or the like 24 and having its lower portion bent outwardly into an arm 25 which is formed with a depressed projection 2B engaging the upper end of the plunger 20. Ordinarily, when the frame 1 tween the metallic washer 2| and the fingers I9 of the contact members I1. This will close the circuit for the motor 4 which in turn effects the rotation of the power driven roll 6 providing the latter is connected therewith through the provi sion of the clutch mechanism 28 usually provided in connection with wringer constructions of this kind. In the operation of the wringer, it will be seen that should the operator get his hand or clothing caught between the rolls of the wringer, this sud den jerk or action would bring his arm or body 75 motor. A novel feature of the device is the loca tion of the plate, carrying the arm 25, and the 20 positioning of the switch I5 in that the frame 1 may be rocked to either side of the wringer and An important feature of the invention is also the provision of a separable connection 35 in the current carrying cable I4 connecting the motor 4 50 with the switch I5. The connection 35 may be of the customary two-part prong and socket ccn struction usually found in wirings of this kind and the lower part thereof is clamped in a sta tionary manner to the shaft housing 36 forming 55 a part of the drive mechanism between the motor and the wringer. It is tobe noted that the con nection is located near the lower end of the shaft housing so that if pull is exerted upon the cable portion above the connection, as when the wringer 60 formed of insulating material. 60 The upward movement of the plunger against the releasing plate I0 causing the same tially straight upward direction effecting the easy separation of the connection parts without break 65 ing or damaging the same or the cable. Another advantage gained by the provision of the separa ble connection is that the cable may be readily disconnected when the wringer head is removed from the washing machine for shipping purposes, 70 Although there has been shown and described a particular type of switch construction, it is to be understood that switches of other constructions may be used equally as well and also, that the switch may be positioned at other points than that 75 2,134,779 Shown and arranged for operation with variously constructed manual controls. What is claimed is : 1. In a wringer, a lower frame having a power driven roller mounted therein, a one~piece upper frame member provided with a cooperating roller, said frame member being pivoted at each end and to one side of said lower frame, locking means for retaining said upper frame member in a normal 10 operating position, driving means for said rollers including a motor, a spring opened switch in the circuit for said motor positioned upon said lower frame, means provided on said upper frame mem ber for engaging said switch to hold it in a closed 15 position, and manually operable means adjacent said rollers for releasing said locking means to permit said upper frame member to swing to one side of said lower frame and said switch to as~ sume an open position. 20 2. In a wringer, a lower frame having a power driven roller mounted therein, pairs of pivots carried by said frame on each side of the vertical plane of the roller, a one piece upper frame mem ber provided with a cooperating roller secured 25 to said pivots, means carried by said lower frame for releasing said upper frame member from en gagement with a pair of said pivots, a switch mounted upon said lower frame, and an operat ing member for said switch carried by said upper 30 frame member whereby said switch will be actu ated to an open position upon movement of said frame member on said pivots. 3. In a wringer, a lower frame having a power driven roller mounted therein, an upper frame member provided with a cooperating roller hori zontally pivoted to said lower frame the pivots for said upper frame member being offset from the vertical plane of said rollers, a switch mount ed upon said lower frame, and a switch operat 40 ing member carried by said upper frame member and arranged to move said switch to an open position upon pivoting movement of said frame member. 4. In a wringer, a lower frame having a power 45 driven roller carried thereby, horizontally ar ranged pivot studs carried by said frame in 01T set relation to the vertical plane of the roller, an upper frame member provided with a cooperating roller supported by said pivot studs, a switch 50 member carried by said lower frame in spaced relation to said upper frame member, and an actuating member for said switch carried by said upper frame member whereby movement of said frame member on said pivots will raise said actu 55 ating member from engagement with said switch. 5. In a motor driven wringer, the combination with a stationary lower frame, an upper frame mounted for swinging movement to each side of said lower frame about axes offset horizontally 60 from the vertical plane of said lower frame, a single switch mounted on one of said frames, and switch controlling means operated by the swing ing movement of said upper frame to either side 3 of said lower frame to stop the driving operation of said motor. 6. In a wringer, a lower frame having a power driven roller mounted therein, a pair of pivots carried by said frame on either side of the ver tical plane of the roller, a one piece upper frame member supported by said pivots and including a cooperating roller journaled thereon, means car ried by said lower frame for releasing said upper frame from engagement with a pair of said pivots, 10 a switch mounted upon said lower frame, and a controlling member for said switch carried by said upper frame and movable therewith to a switch open position upon movement of said frame on either pair of pivots. 15 7. In a wringer, a lower frame having a power driven roller mounted therein, an upper frame member provided with a cooperating roller hori zontally pivoted to said lower frame, the pivotal axis of said upper frame being offset from the 20 vertical plane of said rollers, a switch mounted upon said lower frame in the vertical plane of said rollers, and a member carried by said upper frame controlling the open and closed position of said switch and movable to the switch open 25 position upon pivoting movement of said frame. 8. In a wringer, the combination of a wringer frame including a head section pivoted on a lon gitudinal axis and having a normal central posi tion, wringer rolls mounted in said frame, means 30 by which said head section maintains said wringer rolls under operative spring pressure, said means being re1easab1e_ to relieve said operative spring pressure upon movement of said head section in either direction from said normal position, an 35 operating motor having driving connections for rotating said wringer rolls, a circuit in control of motor operation including switch means normally biased to open position, and switch controlling means engageable with cooperative `means on 40 said head section when said section is in the normal position thereof to hold said switch in circuit closing position and disengageable upon movement of said head section in either direc tion out of the normal position thereof to per 45 mit said switch means to be biased into open position. 9. In a wringer, the combination with a lower frame member having a power driven roller mounted therein, a unitary upper frame member carrying a cooperating roller, said upper frame 50 member being pivotally mounted on an axis to be swingable to either side of the lower frame mem ber, manually operated releasable means for locking said upper frame member in a normal 55 operating position, driving means for said rollers including a motor, a switch positioned in the circuit for said motor, and means responsive to the movement of the upper frame member in either direction for effecting the operation of 60 said switch to break the circuit for said motor. WILLIAM C. F. DIETZ.