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Publication numberUS2464052 A
Publication typeGrant
Publication dateMar 8, 1949
Filing dateJan 13, 1947
Priority dateJan 13, 1947
Publication numberUS 2464052 A, US 2464052A, US-A-2464052, US2464052 A, US2464052A
InventorsJohn Numrich
Original AssigneeJohn Numrich
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Heating unit for pipes
US 2464052 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

March 8, 1949. J, u R c Q 2,464,052


Application January 13, 1947, Serial No. 721,756

1 Claim.

This invention relates to new and useful improvements in means for preventing the formation of ice in pipes especially in drain pipes leading from the eaves of a house to the ground, to a soil pipe, or other outlet.

One object of the invention is to provide a simple, compact, durable, economical, easily assembled unit which can be associated with the element to be ole-iced Whether it be a pipe, a tank, or any other element with which the de-icer can be used.

A further object is to provide a device which can be adapted for use with any length of element to be de-iced and can be quickly and easily installed.

A still further object is to provide a device in which the heating effect can be kept within predetermined bounds automatically and in which the device can be installed without the use of any appreciable number of extra parts.

Further and more specific objects, features, and advantages will more clearly appear from a consideration of the specification hereinafter set forth especially when taken in connection with the accompanying drawings which illustrate a present preferred form which the invention may assume and which form part of the specification.

In brief and general terms the invention includes a series of sections of pipe, in each section of which are embedded heating coils, preferably in parallel, these sections capable of being plugged together to make a heating unit as long as desired. This length of heating unit is preferably disposed within or closely adjacent the element to be de-iced. In the drawings it is shown as within a drain pipe of a house, although it is to be understood that this is but one of many ways in which it can be used.

The heating unit is connected to any suitable source of current preferably within the house, and an extra heating coil in the form of a fiat band of material, housing a heating coil, may be wrapped around the element to be de-iced, such as a pipe.

As later described, the device lends itself to application with existing parts and appliances without requiring any major change in them for the purpose of installing it therewith.

In previous attempts to provide de-icing devices, they have been designed for special locations and in connection with special constructions and this has limited their Wide application to other locations. This invention is of such universal nature and construction that it lends itself to association with and application to any location and almost any sort of element to be de-iced, such as water pipes, drain pipes, water or other tanks, refrigerators, ship tanks, airplanes, radiators, neon light signs, and for railroads in many adaptations.

The present preferred form of the invention is shown, in one application thereof, in the drawings, of which:

Fig. i is a partial vertical section of a house showing the invention as a de-icer for the drain pipe from the eaves.

Fig. 2 is a circuit diagram of the heating units.

Fig. 3 is a partial longitudinal section through ends of adjacent heating sections.

Fig. 4 is a partial section through the drain pipe within the house, showing the manner in which the heating unit wires are led out to be connected to a source of current.

Fig. 5 is a sectional view of a heating unit to be wrapped around an element such as a pipe.

Fig. 6 is a partial perspective view of the heating unit shown in Fig. 5.

Referring now merely to the construction and operation of the form of the invention shown herein, it is seen that there is a house structure if}, having eaves II from which depends a drain pipe I2 leading to a stand pipe l3 in the ground, which in turn is connected to a pipe l4 within the house leading to the sewer mains. It is evident and well known that this drain pipe and the connected pipes in very cold weather may be clogged up with ice, and the intention of this invention is to prevent this action. To this end, it is proposed to support, within the drain pipe and related pipes, a heating unit which is Preferably disposed centrally within said pipes and is supported therein in any suitable manner (not shown). This heating unit comprises a series, preferably, of readily connectable sections such as are shown in Fig. 3, and each section is comprised as follows:

An outer tube of material such as copper or aluminum IS, an inner filling of asbestos I6 in which is embedded in any desired manner heating wires l1 preferably of Nichrome, in the forms of coils, as shown. As shown in Fig. 3, the lower end of one section is provided with a porcelain plug l8 having a projecting lug 19 which is adapted in the well-known manner to coact with a socket 20 in another porcelain plug 2| disposed in the adjacent end of the next section so that the two sections are connected merely by forcing them together whereupon the mechanical union is effected and the electrical connections between the heating wires as well. From Fig. 2, it is seen that the wires are connected in parallel across lead wires such as 22. In a manner common in electric light bulbs and sockets, these lead Wires are connected by merely plugging one section into the other. It will be noted that the lower plug 25 has a projecting portion 23 around the socket 231i, which projection fits snugly into the lower end of the adjacent aluminum or copper pipe is, so that the mechanical connection is made thus secure, snug, and waterproof.

It is clear that as many sections can thus be joined as are required to dispose the heating de icer along any length of element to be heated whether it is the drain pipe or any of the other elements above noted.

As shown in Fig. 4, the lower ends of the aluminum or copper tubes are bent around to pass through the stand pipe l3 and through the pipe it to a point therein where it is bent up through a cap 23 in the pipe It and the cable 2d extending from the sections and containing the lead wires is passed through the cap to be connected to a suitable plug 25 and connected to a suitable source of electricity.

In addition to the form of heater just described, the form shown in Figs. 5 and 6 may be used either by itself or in conjunction therewith. This form is preferably made in band-like shapes such as is shown in Fig. 6, and compris a shallow Umhaped band 2c of spring steel with two spaced layers of asbestos housed therein with an intermediate layer of heating wire 28 formed in any desired shape especially in flat plane formation. The spring steel support for the insulation and the heating wires will cause the element thus assembled to assume a curved shape shown in Fig. 5, which is especially adaptable to be curved or Wrapped around pipes, as shown in Fig. 1. A suitable cable 25 is connected to the wires therein and has a plug 35] on its end to permit this form of unit to be plugged into a source of current. This be used for the purpose of heating the pipe i l inside the house or in any other situation where the heating sections previously mentioned may not be required to be in service.

In either form used, there may be provided a thermostat of any known construction such as 3 l, shown in 2, which will enable the current in the coils to be kept at a predetermined value dependent upon the heat produced.

While the invention has been described in detail with respect to a present preferred form which the invention may assume, it is not to be limited to such details and forms since many changes and modifications may be made in the invention without departing from the spirit and scope of the invention in its broadest aspects. lence, it is desired to cover any and all forms and modifications of the invention which may come within the language or scope of the appended claim.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

A heating unit which comprises detachably connected pipe sections, heating coils insulatingiy disposed in each section, an insulated plug in the end of one section having a body portion with a face disposed at a predetermined distance from of the pipe, and a projecting lug extending therefrom to the end of the pipe, an insulating socket element disposed the end of adjacent pipe section and having a body portion extending a predetermined distance "he of the pipe and having socket rec, rein to receive the proj lug of the ad acent section, the

-tion of the element fitg snugly wi the end of adjacent pipe section whereb firm mechanical, and electrical connection thereby established.


REFERENCES CITED following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,642,197 Fowler Sept. 13, 1927 1,697,049 Appelberg Jan. 1, 1929 1,841,864 Weichelt Jan. 19, 1932 1,938,391 Harrower 1 Nov. 21, 1933 1,997,146 I-Iynes -1 Apr. 9, 1935 2,015,209 Whiteside Sept. 24, 1935 2,022,662 Geyser Dec. 3, 1935 2,111,251 Spilsbury Mar. 15, 1938 2,285,161 ights et al June 9, 1942 2,389,466 Stoffel Nov. 1945 OTHER REFERENCES H. & A. Mtg. 00., Inc, Plastics, November 19%, page 77.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1642197 *Nov 10, 1925Sep 13, 1927Arthur Fowler CoClamp-on electric heater
US1697040 *Sep 23, 1922Jan 1, 1929Birka Regulator AbElectrically-controlled apparatus
US1841864 *Aug 7, 1929Jan 19, 1932Wirt CompanyVariable resistance device
US1936391 *Feb 19, 1931Nov 21, 1933Harrower Archibald Fr ThompsonThawing appliance
US1997146 *Jan 21, 1932Apr 9, 1935Hynes Lee PElectric heater
US2015209 *Sep 28, 1929Sep 24, 1935Howard A WhitesideResistance adapter
US2022662 *Jul 29, 1932Dec 3, 1935Frank R GeyserHeating device
US2111251 *Sep 19, 1936Mar 15, 1938Anaconda Wire & Cable CoIcicle melter
US2286161 *Dec 19, 1939Jun 9, 1942Westinghouse Electric & Mfg CoElectrical resistance unit
US2389466 *May 9, 1944Nov 20, 1945Ohio Carbon CompanyResistor for spark plugs
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2613311 *Jan 25, 1950Oct 7, 1952Miller Mfg Company IncElectrical heating device for poultry watering bowls
US3968348 *May 31, 1974Jul 6, 1976Stanfield Phillip WContainer heating jacket
US5214266 *Sep 26, 1991May 25, 1993Halone Jr John DElectric heating rod attachment insertable into roof exhaust end of sewer vent pipe to prevent clogging from ice or snow accumulation
US6188051Jun 1, 1999Feb 13, 2001Watlow Polymer TechnologiesMethod of manufacturing a sheathed electrical heater assembly
US6263158May 11, 1999Jul 17, 2001Watlow Polymer TechnologiesFibrous supported polymer encapsulated electrical component
US6392206Aug 4, 2000May 21, 2002Waltow Polymer TechnologiesModular heat exchanger
US6392208Aug 6, 1999May 21, 2002Watlow Polymer TechnologiesElectrofusing of thermoplastic heating elements and elements made thereby
US6432344Nov 4, 1998Aug 13, 2002Watlow Polymer TechnologyMethod of making an improved polymeric immersion heating element with skeletal support and optional heat transfer fins
US6433317Apr 7, 2000Aug 13, 2002Watlow Polymer TechnologiesMolded assembly with heating element captured therein
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
US20050098684 *Mar 14, 2003May 12, 2005Watlow Polymer TechnologiesPolymer-encapsulated heating elements for controlling the temperature of an aircraft compartment
U.S. Classification219/537, 219/536, 219/539, 392/481, 219/541, 219/535, 219/520, 219/523
International ClassificationH05B3/00, E04D13/04, E04D13/08
Cooperative ClassificationE04D2013/088, E04D13/08, H05B3/00
European ClassificationE04D13/08, H05B3/00