Патент USA US2060950код для вставки
Nov. 17, 1936. R W, PRATT WATER HEATER Filed April 25, 1955 Y y2,060,950 2,0%,950 Patented Nov. 17, 1936 FFICE UNrrED STATES y y 2,060,950 WATER HEATER Rufus W. Pratt, Philadelphia, Pa. Application April 25, 1935, Serial No. 18,225 1 eiaim'. (c1. 12a-fast) This invention relates to an improved water heater, and one object of the invention is to provide a heater wherein water will be very quickly heated as it flows through coils disposed 5 in a housing over burners and be delivered from a faucet as a continuous supply of very hot water. Another object of the invention is to provide an improved arrangement of heating coils and burners and also an improved housing enclos ing the burners and the coils and so arranged and constructed that hot gases rising from the burners for heating the coils will be retarded in their upward movement in the housing and thus 15 caused to more effectively act upon the coils. Another object of the invention is to provide an apparatus of this character wherein the water first passes through a coil which may be termed a preheater and then through a second coil or heater after which the water is delivered into a pipe of smaller diameter than the pipe or tub ing from which the coils are formed and thus cause the water to be conveyed to a faucet with out appreciable loss of heat. The invention is illustrated in the accom 25 panying drawing, wherein of the coil l by a coupling l2. Other couplings i3 are provided between the coils and the walls of the housing 3 in order that the coils may be easily detached and removed when cleaning or repairs are necessary. Referring to Figures 1 and 3 it will be seen that the outlet portion l@ of the coil 2 has its outer end, which projects from the housing, connected with a tube or pipe M through which hot water iiows to a faucet at a` sink or other point at which the water is to be 10 used. This pipe iii is also formed of copper and is of -less diameter than the tubing from whichy the coils are formed. Therefore, the water pass ing through the pipe Eil will not be liable to cool quickly and will be delivered in a very hot state when the faucet is opened. The hood or hous ing 3 which encloses the coils and the burners ß and e' is formed of strong sheet metal and has a tapered top l5 terminating in a neck it which extends upwardly and is received in a flue il 20 leading to a chimney it so that products of com bustion will be delivered into the chimney and danger of carbon monoxide poisoning prevented. Supporting legs 3a depend from corners» of the housing and doors 3b are provided in the front 25 wall so that access may be had to the interior of Figure 1 is a view showing the improved heat er in vertical section with portions thereof in the housing in order to light the burners, make repairs and clean the burners and coils when elevation. The bottom i9 of the housing is formed with 30 large openings 2t through which air may pass in order to supply the necessary oxygen to the burners and above the coils there has been pro vided a partition 2i formed of sheet metal and resting upon a suitable number of brackets 22 35 carried by the walls of the housing. Openings 23, which are smaller than the openings 2Q, are Figure 2 is a plan vi-ew of the heating coils. Figure 3 is a fragmentary view illustrating the difference in diameter between the tube or pipe from which the coils are formed and the tube or pipe leading to a faucet. This improved water heater consists of a pair of coils I and 2 which are enclosed in a housing 3 and disposed over burners Il and 5 carried by pipes 6 leading upwardly from a main gas sup ply pipe l, flow of gas through the pipes 6 being 40 controlled by valves 8. The coil l constitutes a preheater and the coil 2 a heater and each of these heaters consists of a length of tubing formed of copper or other suitable metal which is bent to form a series of ñat coils disposed one 4 above another, as shown clearly in Figure 1. Each heater has an inlet portion 9 leading from the inner convolution of its upper coil and an outlet portion lli extending from the outer con 50 volution of its lower coil. The inlet portion 9 of the coil or heater l is connected with a pipe Il leading from the street main or other source of supply from which water is delivered under pressure and the inlet portion 9 of the coil or 55 heater 2 is connected with the outlet portion I0 necessary. formed in the partition. By providing the perfo rated partition, hot gases and other products of combustion may pass from the burners to the 40 upper portion of the housing and out through the neck i6 but upward movement thereof will be retarded and, therefore, the products of com bustion, to a certain extent, will be held in the 45 lower portion of the housing and assist in heat ing the coils l and 2. ft will thus be seen that when the heater is in use and the burners 4 and 5 lighted,_ the coils will be highly heated by the flame and products of combustion rising from 50 the burners and as the water passes through the coil l and then through the coil 2, it will be pre heated in the coil l and heated as it passes through the coil 2. Additional coils and corn panion heating burners may be provided 'be 55 2 2,060,950 tween the coils l and 2, if so desired, it being understood that if additional coils are used the housing may be made of greater length. As the pipe Il is of appreciably greater diameter than the tubing from which the coils are formed, the Water will be forced through the coils at high pressure and at a good rate of speed and since the pipe or tube I4 is of smaller diameter than the tubing from which the coils are formed, the 10 speed will be increased as the water passes through the pipe I4. Therefore the water will not have time to cool appreciably before In a Water heater, a housing having an out let at its top and having a perforated bottom, a perforated partition extending horizontally in said housing in spaced relation to the top and bottom thereof, coils in said housing located be tween the partition and bottom of the housing and spaced from Walls of the housing and also spaced from each other transversely of the hous ing and interconnected, one coil constituting a preheater and extending through an end wall 10 of the housing and having an inlet adapted for connection with a Water supply pipe and the flowing out of a faucet at the end of the pipe other coil constituting a heater and having an I4. outlet extending through the opposite end wall It is preferred to have the coils formed from 15 copper tubing, one-fourth of an inch in diameter Y of the housing and adapted for connection with 15 and the tube I 4 three-sixteenths of an inch in a distributing pipe, and burners in the housing diameter, the tube from which each coil is formed being preferably about twenty-six feet in length and the length of the pipe or tube I4 being de 20 termined by pressure» from the water main. Having thus described the invention', what is claimed as new is: under the coils having valve controlled feed pipes extending through the bottom of the housing and adapted for connection with a supply pipe. 20 RUFUS W. PRATT.