US1170169A

US1170169A - Electrical food-warmer.

Info

Publication number: US1170169A
Application number: US2240715A
Authority: US
Inventors: Frank Kuhn; Frank E Shailor
Original assignee: American Electrical Heater Co
Current assignee: American Electrical Heater Co
Priority date: 1915-04-19
Filing date: 1915-04-19
Publication date: 1916-02-01
Anticipated expiration: 1933-02-01

Description

F. KUHN & F. E. SHAILOR.

ELECTRICAL FOOD WARMER.

TlON FILED APR.19,1915.

Patented FebJl, 1916.

Hal/11W!lWl/l/l///////////////////I/JI1/1mIi Wvf esfi/an'eor I UNITED STATES PATENT OFFICE.

mum: m'nm AMERICAN rona'rron or mcmcan.

AND FRANK E. jSHAILOB, OI DETROIT, IIOHIGAN', ASSIGNOBS 'ro ELECTRICAL HEATER COMPANY, 01 DETROIT,

IICHIGAN, A COB- mc'rarcn. soon-wanna.

Specification of Letters Patent.

Patented Feb. 1, 1916.

To all whom it may concern:

Be it known that we, FRANK KUHN and FRANK E. SnAILon, citizens of the United States of America, residing at Detroit, 1n the county ofWayne and State of Michigan, have invented certain new and useful Improvements in Electrical Food-Warmers, of which the following is a specification, reference being had therein to the accompanying drawings.

It is the object of the invention to obtain a construction of electrically heated utensil which is adapted for heating infants food and for other similar purposes.

To this end the invention comprises the construction as hereinafter set forth.

In the drawings: Figure l is a vertical central section through the food warmer; Fig. 2 is a perspective view of the heat ng unit detached; Fig. 3 is a bottom plan v ew thereof; and Fig. 4 is a bottom plan view of the outer casing partly broken away.

A is a vessel of cup form, preferably provided with a handle B and with a nose C for pouring. Below the cup proper is a skirting D, which forms a chamber for inclosing the electric heater and terminal connections.

The electric heater is preferably formed of a resistor F wound upon an insulator core G, such as a strip of mica, and secured to a backing and clamping plate H, with an interposed sheet I of mica or other insulation. Another sheet of mica J is placed on the bottom of the cup A, and the resistor is clamped thereagainst by the plate H. To facilitate the assembly of the parts, the plate H is clamped by a single central clamping screw K, which engages a threaded bearing in a plate L forming the partition in the compartment with the skirting D. This plate L is secured by engagement with lugs M projecting inward from the skirting on opposite sides, an entrance slot M in the plate being provided for engagement with one of the lugs. Thus by tilting the plate it may be passed above the lugs on one side of the skirting, while the lug on the opposite side is passed through the entrance slot M and then engaged by a slight lateral movement of the plate. The screw K ma then be adjusted to bear against the plate and to clamp the same and the heating unit against the bottom of the vessel. The terminals N of the resistor are adapted to pass outward through apertures H in the plate H and alined apertures L in the late L. These terminals are then connectev to the flexible connector cord N which passes through the skirtingD below the partition L. The attachment is formed throu h the medium of connector plates 0, pre erably struck out from sheet metal and secured upon embossed portions 0 of the plate L with insulator washers O therebetween, insulator screws 0 clampin said plates to said embossed portions. fie lates O are further provided with portions and P for respectively connecting with the resistor and conductor cord.

Q are terminal contacts which are connected to the terminal ends N of the resistor and are secured to the portions P by clamp ing screws Q, the arrangement being such that the contacts Q, may be first connected with the resistor, and in the assembling of the parts may be passed through the apertures L in the plate L. These contacts may then be secured to the connector plates 0 and adjusted so as to hold the resistor terminal free from contact with any of the metal parts which would cause a short circuit. To complete the structure, a bottom plate R having supportin feet R is secured near the lower edge 0 the skirting, bein preferably attached to dependin brac ets S upon the plate L. Screws secure the plate R to the brackets S, and thus all of the exposed contacts are housed within the skirting and there is nothing which can cause a short circuit. Furthermore the plates L and R, together with the intermediate air chambers, will form a heat insulation, preventing injury to the stand or support on which the device may be placed.

What we claim as our invention is 2- 1. A food warmer, comprising a cupshaped receptacle having a skirting at the lower end thereof forming a chamber beneath the bottom, a flat electrical heating unit lying adjacent to the bottom of said receptacle, a partition extending between the sides of said skirting beneath said heater, means mounted on said partition for clamping said heater against the bottom, a bottom plate secured to and spaced from said partition, and electrical terminal connections in the space between said partition and bottom plate and surrounded by said skirting.

2. The combination with a cup-shaped receptacle having a depending skirting, of an electrical heater ad acent to the bottom of said receptacle, a partition parallel to said bottom andbeneath the same, lugs upon said skirting with which said partition is detachably slidably engaged, clamping means mounted on said partition for hold-- ing said heater in contact with said bottom, terminals from said heater passing through apertures in said partition, and terminal connections mounted on said partition and connected to said terminals.

3. The combination with a cup-shaped receptacle having a depending skirting, of an electrical heater adjacent to the bottom of said receptacle, a

tition for clamping said heater to said bottom, a lower partition or false bottom, electrlcal terminal connections inclosed in the PIOJGCtiIIg inward from said skirting with an electrical heater adjacent to the bottom of said receptacle, means mounted on said plate for clamplng said heater against said receptacle, terminals on said heater passing through apertures in said, plate, insulated terminal plates mounted on said plate beneath the same, detachable connections between said terminals and said terminal plates, a flexible connector attached to said terminal plates and passing outward through said skirting, and a false bottom for said skirting inclosing said terminals.

5. The combination with a receptacle having a dependin skirting,'of an electrical heating unit, a c amping plate to which said unit is attached, a plate detachably secured by a substantially lateral movement to said skirting extending beneath said heater, clamping means on said plate for holding said heater against the bottom of said receptacle, and terminal connections mounted on said plate and detachably engaging said heater.

6. The combination with a receptacle having a depending skirting, of an electrical heater, an apertured clamping plate to which said heater is attached, an apertured plate detachably secured to said skirting extending beneath said heater, clamping means on said last-mentioned plate for holding said clamping plate against the bottom of said receptacle, and terminal connections extending through the apertures in said plates, engaging said heater and detachably mounted on said plate secured to the skirting.

In testimony whereof we aflix our signatures in presence of two witnesses.

FRANK KUHN. FRANK E. SHAILOR. Witnesses:

HARRY W. LUYoK, OSCAR ECKLIFF.