Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2202095 A
Publication typeGrant
Publication dateMay 28, 1940
Filing dateDec 23, 1938
Priority dateDec 23, 1938
Publication numberUS 2202095 A, US 2202095A, US-A-2202095, US2202095 A, US2202095A
InventorsDelhaye Roy J, Leslie Delhaye
Original AssigneeDelhaye Roy J, Leslie Delhaye
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Sanitary water closet seat
US 2202095 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

May 28, 1940. R. J. DELHAYE ET AL SANITARY WATER CLOSET SEAT Filed D80. 23, 1938 3 Sheets-Sheet. 1

O- R. J. ,DELHAYE ET AL 2,202,095

SANITARY WATER CLOSET 513m Filed 0 25. 1938 4 s snejets-sn et 2 @ears ea/z ,ie/% 3 ZP gy c/je/ g6 1940- R. J. DELHAYE ETAL 02,095

SANITARY WATER CLOSET SEAT Filed Dec. 23, 1958 3 Sheets-Sheet 3 M I W W W" l I Patented May 28, 1940 UNITED STATES SANITARY WATER CLOSET SEAT Roy J. Delhaye and Leslie Delhaye, Highland Park, Ill.

Application December 23, 1938, Serial No. 247,340


Our invention relates in general to toilet seats but more in particular to sanitary toilet seats which are electrically heated to a temperature necessay for sterilization.

It has undoubtedly always been a problem to provide toilet facilities, especially in public places, which are sanitary and free from infectious germs which may come from a user and remain to infect subsequent users. Efforts to overcome this problem except with the use of a staff of attendants have not proven successful even though many devices employed for this purpose have been complicated and expensive. The use of disposable covers has been popular, but so often the coverage is not complete enough nor rugged enough to insure against contact with highly infectious germs.

An object of our invention is to provide an improved sanitary toilet seat.

Another object is to provide such a device which will positively kill all infectious germs and fungi thereon.

Another object is to provide such a device with all of the sanitary advantages, and yet which looks normal, and can be installed and operated in a substantially normal manner.

A further object of our invention is to provide such a device in a relatively simple, fool-proof structure which readily lends itself to pay use so that it can become a satisfactory commercial venture as well as provide sanitary facilities.

A still further object of our invention is to provide a toilet seat which is electrically heated to a high temperature and yet provided in such a construction that the heat is quickly dissipated to make the seat ready for use.

It isalso an object of our invention to provide a toilet seat which can be completel sterilized at the users option and before each use, or can be used without specific sterilization with each use and still will provide a seat more sanitary than normal.

One of the features of our invention is the provision of a toilet seat which may be sterilized by heating electrically, and the electrical operation is so controlled that all danger of use of the seat before cooling is eliminated. The seat is quickly heated and quickly cooled so that little time is required to complete the sterilization process.

Another feature of our invention is the provision of a toilet seat which not only heats but also dehydrates any germs, fungi, pubic lice, or the like on the seat to thoroughly sterilize the same.

Other objects, advantages, and features of our invention will be apparent from the following description taken with the drawings, in which:

Fig. 1 is a side elevation of our complete device with the toilet seat and cover therefor position.

Fig. 2 is a fragmentary plan view of the toilet seat with portions broken away to show the layer construction thereof.

Fig. 3 is a plan view of the cover for our device .with the top thereof removed, and the electrical control structure in the cover shown in a somewhat diagrammatic manner.

Fig. 4 is a detailed sectional view of the contact mechanism between the seat and cover for operating the electrical coil in the seat.

Fig. 5 is an enlarged detail view in vertical section of the locking structure between the seat and cover.

Fig. 6 is a fragmentary view of the structure of Fig. 3 with the electric control apparatus in an advanced position in the sterilization cycle as compared to the position of the same structure shown in Fig. 3.

In practicing our invention we provide a metal in closed covered toilet seat with a heat dissipating body and an insulated heating unit in said seat. The heating unit is energized from a source of electricity such as 110 volt A. C., and the energizing circuit is controlled by switch structure in a cover which maybe locked onto the seat for a timed interval during which the seat is heated to a degree sufficient to completely dehydrate and kill all foreign matter on the seat including many types of germs and fungi, and then cooled sufliciently by heat dissipation from the body thereof to avoid burning of a user. The toilet seat itself is provided in a clean, neat construction of an ordinary appearance for use with or without sterilization. Furthermore, the complete structure and control circuit lends itself readily for combination with coin control and operation to provide a possible profitable commercial venture as well as a sanitary unit.

Referring now to Figs. 1, 2 and 5, particularly, we provide a water closet seat ll! of the usual configuration, so far as the outside is concerned, which is pivotally mounted on a bracket H which in turn is bolted onto the usual bowl 12 for a water closet in a position such that the seat It may rest thereon in the usual manner. A cover l3 for said seat may be likewise pivotally mounted at the bracket I I and the seat I 0 and cover l3 may be pivoted independently of one another or may be pivoted together. The cover l3 will be more fully described hereinafter.

The seat I0 is adapted to be quickly heated to a temperature high enough to dehydrate and kill all infectious germs, skin fungi, and the like thereon so as to render the seat completely sterile and is adapted to subsequently be just as quickly cooled, so that it is available for use. In order to accomplish this result, and at the same time used to raise and lower the cover.

heat therefrom very quickly. Aluminum has been found to be the most, satisfactory metal for this purpose. The top surface and sides of the seat are covered with a non-corrosive and, highly polished metal plate l6, such as stainless steel, and such cover is rigidly secured to the core l4 at the inside edge and the outside edge thereof as is shown in Fig. 5. Intermediate the outer covering l6 and the core N we provide a heating coil suitably insulated on all sides by electric insulating material l8 adjacent the covering IQ and core l4; The heating coil and insulation are provided in such a manner that they occupy a relatively small space intermediate the covering and the core so that the entire seat structure as shown in the cross-section of Fig. 5 is a relatively solid unit. The insulating material is adapted to be highly conductive as to heat and with the covering "5 so closely positioned to the coil, the heat therefrom is quickly transmitted thereto. With the core in physical contact with the covering at some portions there- 'oi and adjacent thereto over the remainder of Employing such a high temperature it is of course wise to prevent a user from touching the seat during the heating operation and until it is cooled. The cover l3 provides the necessary guard and yet is not cumbersome to handle nor unsightly in appearance. The cover l3 comprises a pressed-to-shape sheet metal housing l9 supported on a wooden frame 2|, corresponding inoutside dimensions substantially to like dimensions of the seat l0, and a closure member 22 engages the sidewall 23 of such housing as well as the undersurface of the frame 2| to substantially seal the cover l3 on the bottom. As previously stated, the cover I3 is pivotally mounted at the bracket II and rests on the seat with the sidewall 23 in engagement with a flange 24 integral with the core l4 for the seat. The closure member 22 is spaced from the seat sufiiciently to permit circulation of air over said seat to cool the same. A handle 25 at the front thereof is Standard friction means may be employed at the pivotal mountings forthe cover and seat so that neither cover nor seat will drop to cause unnecessary jar on the apparatus. This is simply a precaution, however, for the entire apparatus is very compact and rugged.

A connection for the heating coil circuit to a source of electrical power is provided through an insulated cable 26 extending into the cover l3 for connection through one conductor 28 on one side of the line to a control switch 21, and then to an intermediate switch unit 29 (Fig. 4). The circuit through the switch 29 extends to the coil or unit while the other side of the power line extends to the heating coil I! through a conductor 28'.

Although the embodiment of our invention illustrated and described herein is simple and relatively inexpensive;- it naturally does represent an investment greater than the usual toilet seat and cover having no provision for maintaining the same sanitary. In order to make the apparatus entirely practical commercially for the maiorlty of installations, a pay feature is included which will enable the party having'the same to gradually take care of his investment and proif a coin 32 is deposited therein and carried to the point where'it will drop into the chute 33 in accordance with the usual practice. It is understood, however, that the initial actuation of the control apparatus can be accomplished by a movable mechanism corresponding to the coin slide and having no pay feature whatever. A flat bar or arm 36 is rigidly secured to the end of the coin-slide 3| and extends to oneside of such slide. A bifurcated extension 31 is likewise provided on the slide 3l-and acts as a continuation of such slide as will be apparent. The slide 3| is shown in idle position in Fig. 6.

The time-controlled switch 21 in the energizing circuit includes a toggle arm 38 pivoted on the housing for the switch, a switch .arm 38 operated by the toggle arm, and switching mechanism within the housing operated by movement of the switch arm 39, and including spri t means 4| for holding the switch arm 39 in an operated position such as shown in Fig. 3. The switch arm 39 is shown in idle position in Fig. 6. The switch arm 39 is directly held in operated position under spring pressure by means of a retractable lug 42 which is projected out of the housing when the switch arm is set in operated position and is maintained in the projected position for the intervalof time over which the switch operates. At the end of this period the lug is automatically retracted and the switch arm 39 is pressed to the idle position of Fig. 6 by the spring means 4 I.

Before moving the coin slide 3|, and in order to guard the seat against use during the sterilize? tion cycle the cover I3 is pivoted into closed position over the seat. The locking structure for maintaining the cover l3 over the seat I0 during the sterilization cycle includes a pivoted locking lever 43 pivotally supported from a bracket 44 secured to a side 23 of the cover housing, and is provided with a locking lip 46 adapted to be moved so as to hook below the flange 24 of the core M on the seat. The lever 43 is actuated by slidable means including a slide arm 41 with a plunger 48 coupled thereto, directly pivoted to the lever 43 at 49, and carrying thereon a spring 5i retained in a cavity in the wooden frame 2|. The frame acts to guide the sliding movement of this'mechanism asis evident from Fig. 5. The lever 43 is retained in locked position for a predetermined time interval by means of a control unit 52 which can be substantially identical with the switch 27 except that it has no electrical function. The unit 52 is provided with a toggle arm 38', a switch arm 39, spring means 4|, and a retractable lug 42, all operating as heretofore explained. As mentioned above, we have found that operating the coil for a period of thirty seconds to provide a temperature of approximately 250 F. will accomplish the desired sterilization. We have also found that this temperature need be maintained for only approximately thirty seconds and the seat will then satisfactorily cool with our construction in an additional period of thirty seconds. The switch 21 is therefore timed for thirty seconds and the control unit 52 for sixty seconds. A slidable arm 41 is operatively connected with the unit 52 by means including a sliding link 53 having a projection 54 thereon for engagement in a corresponding notch 55 in the arm 41. The arm 41 is slidable in a straight line on guide pins 56 which rest in corresponding slots 51 in the arm. A combination pivot and guide pin 58 rides in a corresponding slot 51' and is secured to a pivoted lever 59 for moving the arm 41 as will be explained. The link 53 may be pivoted slightly as is necessary, and likewise moved toward and away from the arm 41 while maintained on a guide and pivot pin 8| in the slot 62 in such link. A bellcrank lever 63 is pivotally connected to the link 53 and to a second link 64 pivotally secured to the switch arm 39 andmovable with the latter. A tension spring 66 is connected to the bell crank lever 63 and acts to hold the projection 54 in the notch 55 on the arm 41. The toggle arms 38 and 38 are connected by a bar 61 secured to each arm with such bar 61 being connected with a tension spring 68.

Operation To set the complete control apparatus in operation and energize the coil l1, the cover I3 is pressed down onto the seat Hi, a coin 32 is deposited on the slide 3| and the latter pushed inwardly into the cover l3 or to the left as viewed in Fig. 6, from the idle position of Fig. 6 to the operated position of Fig. 3. During this sliding movement the arm 36 engages a stud 69 on the bar 61 and at approximately the same time or shortly thereafter, the extension 31 on the slide 3| engages a stud 1| on the lever 59 to pivot the same from the dotted line idle position of Fig. 6 to the full line operated position. During the final movement of the slide and after the coin has dropped in the chute 33, the toggle arms 38 and 38' are moved to the left to set position. Also, the pin 58 in the lever 59 engages against the right-hand end of the slot 51' in the arm 41 to move the latter to the right to pivot the locking arm 43 and catch the lip 46 below the seat In. During this operation the spring 5| is compressed while the spring 68 is extended and put under tension. As the switch arm 39 is moved from the dotted line position of Fig. 6 to the full-line position in the same figure, as well as in Fig. 3, the link 64 pivots the bell crank lever 63 from the dotted line position shown in Fig. 6 to the full-line position in the same figure. The spring 66 being under tension in the idle position of the bell-crank lever 63 assists this setting operation and pulls the link 53 with the projection 54 thereon into the notch 55 in the sliding arm 41 to hold the latter in locked position. As soon as the operators finger is removed from the coin slide 3|, the tension in the spring 68 returns the slide to idle position, and the stud 69, in engagement with the arm 35, moves the bar 61 to the right to carry the toggle arms 38 and 38' therewith. The switch arms 39 and 39' operate independently of the toggle arms and the latter are used merely to set the switch arms in operating position. The various arm and connecting links as well as the locking arm 48 are then maintained in operated position entirely by the time-controlled projections or stop lugs 42 and 42.

When the stop lug 42 for the switch 21 is automatically retracted at the end of a thirty-second interval, for instance, the switch arm 39 is pressed to the right moving the switching mechanism in the switch so as to break the circuit to the heating coil |1. During the succeeding thirty seconds, if that is the period of time chosen, the seat I is cooling and at the end of that period the stop lug 42' is retracted permitting the switch arm 39' to be thrown to the right to the dotted position shown in Fig. 6. 'In order to prevent any danger of the switch arm 39' being released to release the locking structure before the heating coil circuit is broken, a safety link 13 connects the two switch arms 39 and 39, and with the switch arm 39 in the operating position shown in Fig. 3 a pin 14 in a slot 16 in such link holds such link in the operating left-hand position shown in both Figs. 3 and 6. Ihis link is pivotally connected to the switch-arm 39 at a pivot pin 11 so that the switch arm 39' cannot throw to the right to idle position unless the switch arm 39' is likewise in idle position as shown in Fig. 6 so that the slot 16 will move past the pivot pin 14 in such arm 39. With these switch arms operating in successive order as above explained, however, when the switch arm 39' throws to the right, it pivots the bell-crank lever 63 to the dotted line position shown in Fig. 6 to raise the link 53 and release the projection 54 from the corresponding'notch 55 in the arm 41. The pressure in spring moves the plunger to the left to release the locking arm 49 and alsn pivot the lever 59 to idle position shown in dotted lines in Fig. 6. The cover I3 may now be lifted at the handle 25 and the seat is ready for use.

From a consideration of the drawings and the above description as to the operation of our ap paratus, it is evident that a control apparatus in the cover l3 could be operated by movement of the coin slide 3| with a coin 32 therein, to set the time control units 21 and 52 even though the locking arm 43 was not in looking engagement with the seat H]. To prevent this, however, and therefore avoid any possibility of a user heating the seat without it being guarded to prevent burning, we provide the switch 29 which is connected into the energizing circuit on one side of the line and prevents the completion of the energizing circuit unless the cover is actually closed onto the seat as shown in Fig. 4. The switch comprises a curved element 18 secured to the housing i9 for the cover i3 and carrying therein a wire 15 from the switch 21. The wire is soldered or otherwise secured to a spring contact 19 carried in an insulated bushing 8| at the mouth of the member 18 and the latter is adapted to telescope into a corresponding insulating tube 82 rigidly secured to the seat lli at the core thereof for carrying a wire or conductor 80 connected to one end 01 the heating coil l1. The members 18 and 82 are circular in configuration to correspond to a pivotal movement of the cover l3 with relation to the seat Ill. The insulating tube 82 has a channel 83 at one side thereof for carrying the conductor 89 which in turn is soldered or otherwise secured to'a ring contact 84 rigidly mounted into the wall of the tube 82. The spring contact 19 is illustrated in Fig, 4 in contact with-the ring 84 and in this position completes the electric energizing circuit. When the cover l3 and seat ID are separated, however, the member 18 is teiescoped into the tube 82 and the contacts l9 and separated so that the energizing circuit cannot be completed even though the switch 21 is closed. The second conductor 28 in the energizing circuit is enclosed in a flexible cable 86 extending between the cover and the seat and bending in the usual manner when the cover and seat are separated.

The disclosures of this application are illustrative and the invention is not to be limited by them, In fact, if modifications or improvements are not at once obvious they may be devised in the course of time to make additional use of the broad ideas taught and covered by this application. The claims are intended to point out novel features and not to limit the invention except as may be required by the prior art.

We claim:

l. A sanitary water closet seat adapted to be electrically heated for sterilizing the same including a metal outer portion, a heat dissipating metal core within said outer portion, and an energizable heating coil for said seat intermediate said outer portion and core and insulated from each.

2. In a sanitary water closet seat having a heating unit in said seat and guard means adapted to be closed in a position to substantially prevent access to said usable surface, means for simultaneously energizing said heating unit and looking said guard in closed position, with said means continuing operative during an interval of time suflicient to heat said seat to sterilize the usable surface and for said usable surface to subsequent- 1y become cooled.

3. In a sanitary water closet including a seat having an electric heating unit in said seat, an energizing circuit for said unit, and a time-controlled switch for closing and opening said circuit, means for actuating said switch including a slidable coin carrying member adapted for receiving a coin and to be finger-pressed thereafter to a position at which said coin is lost, and engaging means on said member operatively connected with said switch for actuating the same to an operating circuit closing position when said member has lost said coin.

4. In a movable sanitary water closet seat com-- prising a non-corrosive metal outer portion, having a time-controlled heating unit beneath said outer portion for heating the same, electric insulating material enclosing said heating unit, and a light weight heat conducting solid metal core within said outer portion and rigidly connected thereto for supporting said outer portion and conducting heat therefrom.

5. A sanitary water closet seat, including in combination, a solidaluminum core, a metal covering for said core, a heating unit carried in said seat intermediate said cover and said core, and insulating means separating said heating unit from said cover and core and providing therewith a substantially solid seat.

6. In water closet apparatus including a sterilizable seat and means comprising a cover movable relative to said seat and adapted to be positioned substantially over said seat for preventing use of the seat during sterilizing, the combination of locking means for locking said cover over said seat including a pivoted locking arm mounted on said cover having a locking portion at one end adapted to engage under said seat and link means connected to said arm at the other end thereof, and manually operated means operatively connected with said link means and extending out of said cover for movement'to actuate said link means and pivot said locking arm into locking having a heating unit therein with an energizing circuit therefor, a switch for said circuit and a cover for covering said seat while it is being heated, the combination of locking means having a pivoted locking arm mounted on said cover and adapted to engage said seat to lock said seat and cover together, a coin carrying slide slidably mounted on said cover, and movable link means operatively connecting said slide with both said locking means and said switch, with said coin slide carrying a coin therein adapted to be moved to a position to lose said coin and to thereafter move the locking arm todock said seat and said cover together and to close said switch to energize said heating unit.

8. In water closet apparatus including a seat, an electric heating unit insaid seat, and a'cover mounted for pivotal movement relative to said seat and having an electric conductor therein connected with a source or electric power for energizing said heating unit, the combination of switch means intermediate said cover and said seat for completing a circuit through said conductor and said heating unit when said seat and cover are in adjacent position, said switch means including a curved tube member secured to said cover, a spring contact rigidly secured in said tube electrically connected to said conductor, a second curved tube of larger diameter than said first tube rigidly secured to said'seat having a contact portion rigidly carried therein and electrically connected to said heating unit, with said first tube adapted to telescope into said second tube when said cover is pivoted with reference to said seat, and said spring contact and said contact portion positioned in said tubes in a manner such that they are in engagement when said seat'and said cover are in adjacent position.

9. In a sanitary ,water closet including a seat, an electric heating unit in said seat, and an energizing circuit for said heating unit, the combination of a time-controlled switch connected into said circuit for closing and opening the same, with said switch adapted to maintain said circuit closed for no more than thirty seconds on a single heating operation, guard means for rendering said seat non-usable during said heating a period beyond said heating 'perlod sufllcient to permit said seat to cool after the heating thereof.

10. In a sanitary water closet including a; seat, electric heating means in said seat, guard means for rendering said seat non-usable during a heating period thereof having locking means theremeans upon movement of said actuator, and connecting means intermediate said locking means and said time-controlled means acting to unlocksaid locking means upon expiration of a controlled period of time for the heating and the cooling of said seat.



time-controlled means and lock said locking I

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2458019 *Oct 26, 1943Jan 4, 1949Edward SpiererMethod and means for sterilizing toilet seats
US2602492 *Mar 25, 1946Jul 8, 1952Fowler Jefferson DElectrically coin-operated chair
US2798142 *Jun 8, 1955Jul 2, 1957Piero Mancin GiuseppeHeated seat
US6307180 *Jan 4, 2000Oct 23, 2001Watlow Polymer TechnologiesHeated toilet seat and methods for making same
US6392208Aug 6, 1999May 21, 2002Watlow Polymer TechnologiesElectrofusing of thermoplastic heating elements and elements made thereby
US6415501Oct 13, 1999Jul 9, 2002John W. SchlesselmanHeating element containing sewn resistance material
US6432344Nov 4, 1998Aug 13, 2002Watlow Polymer TechnologyMethod of making an improved polymeric immersion heating element with skeletal support and optional heat transfer fins
US6434328Apr 23, 2001Aug 13, 2002Watlow Polymer TechnologyFibrous supported polymer encapsulated electrical component
US6516142Feb 12, 2001Feb 4, 2003Watlow Polymer TechnologiesInternal heating element for pipes and tubes
US6519835Aug 18, 2000Feb 18, 2003Watlow Polymer TechnologiesMethod of formable thermoplastic laminate heated element assembly
US6539171Jan 8, 2001Mar 25, 2003Watlow Polymer TechnologiesFlexible spirally shaped heating element
US6541744Feb 12, 2001Apr 1, 2003Watlow Polymer TechnologiesPackaging having self-contained heater
US6744978Jul 19, 2001Jun 1, 2004Watlow Polymer TechnologiesSmall diameter low watt density immersion heating element
US6748646Feb 21, 2002Jun 15, 2004Watlow Polymer TechnologiesMethod of manufacturing a molded heating element assembly
US8769729 *Jan 7, 2013Jul 8, 2014Panasonic CorporationToilet seat apparatus
US20050098684 *Mar 14, 2003May 12, 2005Watlow Polymer TechnologiesPolymer-encapsulated heating elements for controlling the temperature of an aircraft compartment
US20130117920 *May 16, 2013Panasonic CorporationToilet seat apparatus
DE1299825B *Dec 4, 1967Jul 24, 1969Matsushita Electric Ind Co LtdElektrisch beheizter Klosettsitz
U.S. Classification4/233, 194/229, 219/217
International ClassificationA47K13/00, A47K13/30
Cooperative ClassificationA47K13/302
European ClassificationA47K13/30C