US1170170A - Electrically-heated glue-pot. - Google Patents

Description

F. KUHN & F. E. SHAILOR.

ELECTRICALLY HEATED GLUE POT.

APPLICATION FILED APR. I2. I9I5.

1,170,170. Patented Feb. 1, 1916.

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`A UNITEDs'IATEs PATENT OFFICE.

TRANK KUHN ANI FRANK E. sHAILoR, or DETROIT, MICHIGAN, Ass'IeNoRs To AMERICAN ELECTRICAL HEATER COMPANY, or DETROIT, MICHIGAN, A CoR- PoRATIoN or MICHIGAN.

To all whom t may concern.: v

Be it known that we, FRANK KUHN and FRANKfE. SHAILoR, citizens of the United States of America, residing at Detroit, in

the county of Wayne and State of Michigan,

have\ invented certain new and useful Improvements in Electrically-Heated Glue- Pots, of which the following is a specification, reference being had therein. to the ac-l -companying drawings. t

The invention relates to heating'- apparatus of that'type in which the material to ,be heated is placedin an inner .vesselsurrounded by a water chamber, through the medium of which the heat is' distributed and regulated. t A

' It is the object of the invention to obtain a construction adapted to be electrically heated, and more particularly 'it is an object to obtain a lsimple and eiiicient construction .of apparatus for use as a glue pot. y

To this end the;l invention comprises the construction asherenafter set forth.

' In the drawings: Figure .1 is a vertical central section through the-apparatus; Fig. '2 isa bottom planvlew` of a portion of the water-holding receptacle showing the elec-l tric heater applied thereto; and Fig. 3 is a;

section onl line w-:z: Fi 1.

A is an outer vessel ormed withbottom, side w-alls and preferably with supporting legs B.

C is an inner vessel spaced from the walls and bottom of the outer vessel A and having formed integral therewitha top Bange D.

This top iangev extends outward and is bolted or yotherwise secured to the top of the' vessel A. There is also an inwardly-extending ange E which yforms the support for 40 the innermost vessel F. Thus the three vessels A Gand F are arranged parallel to each other and are .connected at the top,

f while the sides and bottoms are spaced. The

space Grk between the innermost vessel and .45 vesselfC forms the water chamber, while the space H Ibetween the vessel'C and outer .'vessel A forms a sealedair vchamber operatin as a heat-insulation.

o, equip this apparatus with electrical i heating means the vessel C has secured to l its bottom, preferably 'cast therein, a series of studs I, 'which are threaded for the fenga ment of nuts J.

' is an insulated electric heating unit Specicationvof LetterisIPatent.` l Application led April 12, 1915. i Serial No. 20,894.

- more, the housing T which incloses the insuseal with said boss.

Patented Febfl', 1916.

placed against the bottom of the vessel -C and clamped thereto by a heat-distributing plate L which is'secured by the studs I and- .nuts J.

M is an insulator block which is secured to the bottom of the'vessel C, and to which the terminals from the heating unit are led. This bloclrsupports the binding screws N, which are connected to the conductors O, the latter extending upward through the air space H and being insulated preferably by beads P strung thereon. The ange D .is cut-away 'at Q for the passage outward of these conductors, andan insulator terminal block R is mounted upon the outer face of I the ange for connection with external flexible conductor cord S. T is a metallic: housing for the block R, which is secured to a boss U onfthe-lange D, preferably with a gaslket V therebetween to form a liquid-tight sea With the construction described, the elecp trical part of the apparatus is thoroughlyyprotected where there can be no danger of short circuiting from any cause, such for instance as the .boiling over of the ot. This is due to the fact that the vessel is imperfora-te, and as it is formed integral with the' fiangeD there is no opportunity for leakage of water into the chamber II. Further-K 85 lator terminal block R has a .liquid-'tight joint with the boss U on the flange I), and as this housing extends up above the rim of the pot it will exclude water from the terminals. t Y

What we claim asour invention iss- 1. The combination with a vessel for holding liquid to be heated, of an outwardlyextending lange integral with said vessel, an outer casing surrounding said vessel and secured'to said flange, an electric heater se- .cured to the bottom of said vessel in the space between the same and the bottom of the outer casing, terminal connections for said heater passing outward through an aperture in said flange, said flange bein provided with a boss anda housing for sai terminal connections secured to said boss and above said flange forming a liquid-tight 2. The combination with a vessel for containing liquid to be heated, of an outwardlyextending flange integral with said vessel at the upper end thereof, an outer casing surrounding said vessel and spaced therefrom,

secured to the under face of said outwardlyextending ange, an electric heater clamped tothe bottom of said vessel and housed in the space between the same and the bottom of the outer casing, terminal connectors passing from said heater upward through the space between the same and the outery case and 4outward through an aperture in said flange, an insulator block mounted on said flange through which said terminall connectors pass, and a housing of inverted cup-shaped form inclosing saidinsulator block and secured to said flange with a liquid-tight seal.

3. The combination with a vessel havingintegral'with its upper end an outwardly and inwardly extending annular flange, a casing surrounding said vessel and spaced therefrom, secured at its upper end to said outwardly-extending flange, an inner vessel supported upon said inwardly extending flange and depending within said rstmentioned vessel, studs depending from the bottom of said first-mentioned vessel, an electric heater clamped to the bottom of said vessel by said studs, terminal connections from said heater passing upward through Limit/o the space between said vessel and outer casing and outward through an aperture in said outwardly-extending flange, a terminal block above said ange, and a `housing for inclosing said terminal block mounted upon said flange, forming a sealing joint there'- with.

4C. 'lhe 'combination with a vessel having integral with its upper end an outwardly c and inwardly extending annular flange, a casing surrounding said vessel and spaced therefrom, secured at its upper end to said HARRY W. Leren, @scan A.. Esamina.

` outwardly-extending flange, an` inner vessel

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