reference is now made to fig1 of the drawing , where there is shown a doll 10 simulating a human baby . it is to be understood , however , as the following description proceeds , that the invention applies to the simulation of any warm - blooded mammal and is not to be construed as limited to a human form . as shown in fig2 the outer shell 12 of the doll is composed of a non - porous soft plastic such as a vinyl plastic , which may be formed from a plastisol in a hollow mold by conventional techniques to prevent the passage of liquid through the wall thereof . a fluid - tight vessel 14 , preferably plastic , is positioned within the body 12 and has its end orifice 15 closed by a plug 16 . as shown in fig3 and 4 , plug 16 is provided with a number of bores 18 extending through the plug body . tubular nipples 20 and 21 extending from the plug body 16 receive tubes 22 and 23 . tube 23 leads from nipple 21 to a mouth portion 26 . a valve 28 , described more fully hereinafter , opens into tube 23 when the nipple 30 of a bottle 32 is inserted in the mouth orifice 26 . the bottle 32 is of such size as to limit its capacity to a sufficient quantity of water 34 to activate the exothermic salt 36 disposed within vessel 14 . it will be noted that tube 22 is provided with a plurality of openings 24 disposed along and about the tube 22 to distribute the water into the vessel 14 so as to uniformly activate the exothermic salt 36 therein . by way of example , a suitable flutter type valve 28 is shown in fig5 . one end of the valve 28 is normally closed by mating lips 33 that open under pressure and by the insertion of the bottle nipple 33 while the other end of the valve 28 terminates in a sleeve portion 35 which is captured between the inwardly extending tubular mouth portion 26 and the tube 23 . the members may be force fit to secure them together and can be additionally , or alternatively , solvent or heat - sealed thereto . as the body 12 is cuddled by a child , it is squeezed and compressed , forcing air through a one - way valve 37 oriented to vent the air into the atmosphere . the valve 37 may be conveniently hidden within the doll &# 39 ; s ear 38 and vented at an orifice 40 . in turn , releasing the pressure on the body 12 permits it to expand and create a vacuum , which draws the water through one - way valve 28 from the bottle 32 to activate the exothermic salt . the water flows by gravity through tube 23 into tube 22 and dispersed therefrom at openings 24 into the exothermic salt 36 . heat released by the chemical action of the salt is transmitted through the walls of vessel 14 and through a heat conductive , or at least relatively poor heat insulating filling 42 to the outer wal1 12 . the filling 42 may consist of a cotton wadding , synthetic fibers , pieces of foam rubber or plastic , such as polyurethane foam . as the exothermic salt 36 heats up , water will be evaporated and will pass through orifices 18 of plug 16 . to assure that the salt is retained within the vessel 14 , the orifices 18 may be covered by a fine mesh screen 19 to prevent the fine salt particles from escaping from the vessel 14 and effectively close the same . elasticized nylon cover 44 fits tight around the neck 46 of the body 12 and held in such position by a locking connector 48 of the head 50 . the cover 44 permits air and water vapors to pass therethrough to the ear vent 40 and out to the atmosphere . a child cuddling the doll 10 will feel its warmth and , if the skin is of the vinyl type , the doll will feel human and alive . the exothermic salt employed should be of a type which is non - toxic and preferably can be reactivated for reuse by drying out the salt as the air and water vapors exhaust through the vent 40 . exothermic salts are disclosed , for example , in u . s . pat . no . 3 , 535 , 246 . vessel 14 may be made of heat - sealed flexible plastic film , such as vinyl or polyethylene having a thickness of about 10 mils or of a rigid or semi - rigid plastic container , produced by injection molding or blow molding . the container 14 for the exothermic material 36 may be extended in length to conform to the shape of the torso and limbs of the doll 10 as shown in fig7 . for this purpose , the aforementioned flexible container construction may be made to include a tube 62 that leads from the mouth orifice to a junction block 64 . water is distributed from junction 64 to perforated tubes 60 in the arm portions and to tube 65 , which leads to a junction block 66 , which distributes water to perforated leg tubes 68 . in this manner , the whole or substantially the whole of the doll 10 may exude the heat of the exothermic salt and its chemical reaction . the head 50 may be hollow , as shown in the drawing , or may be filled . in the latter case , a conduit is provided from the container 14 to the orifice 40 communicating with the atmosphere in the manner as described previously . in this case , the configuration of plug 16 may be changed to have two equal diameter passages in lieu of 8 small holes and one large hole as shown in fig3 and 4 . one passage may still connect tube 23 and tube 22 while the other will connect volume 36 with 37 and 40 as shown in fig6 . the additional conduit may be fitted with a fine mesh filter similar to 19 . while there have been shown and described and pointed out the fundamental novel features of the invention as applied to a preferred embodiment thereof , it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention . it is the intention , therefore , to be limited only as indicated by the scope of the claims appended hereto .
a doll simulating a warm - blooded human baby or other mammal form is provided with an internal vessel containing an exothermic salt and means to introduce water into the vessel to activate the salt to release heat . the heat is transferred to the wall of the doll to provide a feeling of body warmth .