US1886042A

US1886042A - Refrigerator

Info

Publication number: US1886042A
Application number: US488390A
Authority: US
Inventors: Fred H Osborne
Original assignee: Grigsby Grunow Co
Current assignee: Grigsby Grunow Co
Priority date: 1930-10-13
Filing date: 1930-10-13
Publication date: 1932-11-01
Anticipated expiration: 1949-11-01

Description

Nov. 1, 1932. F. H. OSBORNE REFR IGERATOR Filed Oct. 13. 1950 Patented Nov. 1, 1932 UNITED STATES PAT ENT" OFFICE FRED H. OSBORNE, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIIIGCN'MIEINIDS, '10

.' GRIGSBY-GRUNOW COMPANY A CORBQ'RATTON OF ILLINOIS REFRIGERATOR Application filed October 13, 1930. Serial No. 488,390.

This invention relates to refrigerators, and particularly to theautomatic control of the temperature thereof. In mechanical refrig eration units it is customary to have the operating mechanism automatically controlled in accordance with the temperature of the evaporator or refrigerating compartment. Thus, in household refrigerators,it is customary to have a volatile substance, such as liquid sulm phur-dioxidein a cartridge communicating with a sylphon bellows, or suitable expansible chamber. The variation in temperature of, the evaporator results in a variation of pressure of the sulphur-dioxide within the cartridge and results in a movement of the bellows or chamber wall; By suitable mechanism this movement is adapted to control the source of power and thus control the refrigerating mechanism. As a rule, such cartridges are soldered or clamped directly against a portion of the evaporator, or are disposed in the refrigerating chamber, oomletely removed from the evaporator.

The first disposition of the cartridge against the evaporator is objectionable for the. reason that, if the thermostatic control is g adjusted for low temperature, it frequently occurs that the refrigerating compartment, wherein food and similar materials are stored, has its temperature reduced to, or below, freezing. If the second disposition of the cartridge is chosen, excessive and unnecessary operation of the mechanism will result'when the refrigerator door is frequently opened.

An object of this invention is to devise a mounting for the cartridge, so that the resulting temperature control will be exercised by both the evaporator and refrigerating compartment in substantial degrees. An additional object is to devise amounting for connecting the evaporator and cartridge so that a predetermined rateof heat transfer between the evaporator and cartridge may take -place.' An additional object is to devise a mounting, of the character described,

which may be adjusted so thatsubstantially the same mounting may be used for refrigerators and evaporators of difierent sizes and capacities.

Referring to the drawing:

Figure 1 isa front View of an evapoiator,

showing a thermostatic control with its cartridge mounted upon the evaporator with the improved bracket.

Figure 2 is a detail of the bracket itself. Referring to the drawing; An evaporator of the usual type is shown and'comprises a header, or gas chamber 1,

with depending duct loops 2. Loops 2 inclose a .freezing chamber in which are disposed trays 3 for freezing ice or similar purposes. As is well known, the complete evaporator is disposed inside, of a heat insulated container and is adapted to chill the air therein.

A thermostatic refrigerator control is connected by a length of flexible piping 5, to a.

cartridge 6, containing any suitable volatile liquid, such as compressed sulphur dioxide.

In order to suitably support cartridge 6 in desired heat conducting relation to the evaporator, a bracket, generally designated as 10, is provided. This bracket, which may be made out of one piece of sheet metal, comprises a substantially elongated mounting portion 11, having a similar portion 12 joined thereto at one edge, and at right angles thereto. Portion 12, which is also referred to as the heat conducting portion, has its sides extended toit the evaporator, heat conducting portion 12 I 19' metal discs may be inserted until the desired has punched out therein a plurality of knockouts 20. A predetermined number of these knock-outs'may be very easily removed leaving circular apertures and resulting in a 1? decrease in the amount of metal joining mounting portion 11 and clips 14 and 15 of the entire bracket. If for some reason a change is desired after the installation of the bracket, more knock-outs may be removed or rate of heat transfer is effected. 7

It is evident that by virtue of thelarge exposed surface of cartridge 6, the temperature of the air in the refrigeratingcompartment will have a substantialefiect upon the pressure developed Within the thermostatic control. Obviously this eiiect may be varied by suitably changing the heat conducting 1 properties of the bracket, as Well as the exposurof the cartridge to the air. I

I claim: 1 1. Ajbracket for mounting 'a temperature controlmember to the cooling unit of a re I frigerator comprising a mounting portion for mountin said bracket on said cooling unit, a clamping portion for fixedly retaining said heat control member and a heat cohducting portion joining said two portions, said heat conducting portion having removable -means for readily varying the amount of metal joiningsaid two portions and thereby varying the heat transfer therebetween.

2. A bracket adapted to maintain a heat control member in predetermined relation to a refrigerator evaporator comprising a strip of metal having a plurality of knock-outs therein for ready removal, and means on op posite sides of said strip for mounting said strip on said evaporator and mounting said heat control member on said strip.

3. A bracket for maintaining a heat controt member and evaporator in desired heat conducting relationship to each other, comprising a single piece of stamped metal having one end thereof serving as a mounting portion fonmounting said bracket on said evaporator, the other end formed as a m'ount ing portion for maintaining said heat .control r member and an, intermediate heat conducting portion Joining said two portions and having a plurality of knock 'outs cut therein where- Z by any desired number of said knock-outs may he removed to alter the heat conducting r properties of said intermediate portion. 4. A bracket for mounting a heat control 5 member on an evaporator, comprising a single piece ofstamped metal, bent to form a U shape, and a plurality of knock-outs punched in the intermediategisection of the strip, whereby the heat conducting property of said center portion may be readily adjusted i In testimony whereof he afixes his signature.

a i FRED H. OSBORNE.