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4240264 |
Interior unit of a split type air-conditioning apparatus
An interior unit of a split type air-conditioning apparatus which is usually mounted on a wall of a room to be cooled and is extremely thin. The unit consists of a cabinet structure including a...
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4220048 |
Cooler and level indicator for beer kegs
A cooler and level indicator for beer kegs comprising an insulated container for holding iced water in contact with a keg of beer, an insulated cover for sealing the container and an externally...
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4195491 |
Dry ice refrigerator
Apparatus for converting a conventional insulating picnic cooler or the like into a refrigerator includes a small container, disposable within the cooler, for dry ice. A rectangular frame...
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4110998 |
Apparatus for detecting and removing contaminants from a refrigeration system
A device for detecting and removing contaminants from charged refrigeration systems comprising conduit means temporarily communicating the high pressure liquid line of the system with the lower...
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4108000 |
Gauge glass protector
A gauge glass protector includes an annular grommet carried by a frustro-conical skirt and an inverted collector rim at the circumference of the skirt. A drainage hole for condensate is located at...
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4064826 |
Refrigerant liquid indicator
A sight glass device for liquid line is provided which clearly demonstrates to an observer the state of the fluid in the line, and which magnifies even small bubbles of gas. The device includes a...
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4018061 |
Moisture indicator
A moisture indicator particularly adapted for use in a refrigerant system to indicate by visual inspection the moisture content of refrigerant therein. A preferred embodiment of the indicator...
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4014178 |
Refrigerator temperature controls
A refrigerator principally for home use, the refrigerator having a temperature control panel on the front exterior thereof for indicating and regulating the temperatures within both the freezer and...
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4003044 |
Alarm device having an oscillator
Whenever power fails, an audio signal is produced by an oscillator, which includes a pair of transistors of opposite conductivity having the collector of each connected to the base of the other and...
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3996765 |
Refrigerant system charging and evacuating manifold
A device for servicing closed refrigerating systems comprising a body having a passageway therethrough provided at its respective ends with threaded members for connecting the device to an access...
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3995686 |
Energy consumption indicating system
A system for use in multiple occupancy buildings wherein energy consumption for comfort heating or cooling is centrally metered to provide an indication of relative amounts of energy used by the...
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3959787 |
Refrigeration alarm
An alarm for signalling an improperly high temperature in a refrigerated container such as a freezer includes a thermostat within the container and an alarm unit magnetically mounted on the outside...
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3937847 |
Method of and means for preserving perishable foodstuffs
A method of preserving foodstuffs by placing them in a container of given volume in which air at atmospheric pressure is present and selectively removing the oxygen from the air in the container...
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3933120 |
Alarm for deep freezer
An apparatus for intermittently sounding an audible alarm when the temperature within a deep freezer rises to a predetermined level which is less than the freezing temperature of most food products...
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3933030 |
System for continuous monitoring of the density of cryogenic liquids via dielectric constant measurements
A system has been invented for the continuous determination of density of cryogenic liquids such as LPG and LNG to within ± 0.1% or better using differential capacitance measurements. This system...
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3926000 |
Automotive air conditioner and method of operating the same
Automotive air conditioners tend to overheat and also cause the automobile to overheat when it is operated at slow speeds or idled. This problem is overcome by providing an improved automotive air...
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3916641 |
Refrigerant system charging and evacuating manifold
A device for servicing closed refrigerating systems comprising a body having a passageway therethrough provided at its respective ends with means for connecting the device to an access valve of the...
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3912453 |
Method of determining the alkali metal hydroxide concentration in an aqua-ammonia-chromate solution for use in an absorption refrigeration system
A method of determining the sodium hydroxide concentration in an aqua-ammonia-chromate absorption solution comprising adding formaldehyde to the solution to react with the ammonia in solution, and...
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3903709 |
Refrigerant charging apparatus
A refrigerant charging apparatus for charging an operating refrigeration system. The apparatus includes an expansion chamber connected between a thermal expansion valve and the suction line of the...
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3874323 |
Gauge for liquid, low-cooled pressure gases
A gauge or detector for low-boiling, liquefied gases is characterized by a transparent tube through which the liquefied gas passes with a vacuum-tight chamber surrounding the tube. The chamber has...
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3838578 |
AIR CONDITIONING SYSTEM
Thermochromic materials disposed at various locations in an air conditioning system which change color in response to abnormal operating conditions.
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3831391 |
APPARATUS FOR TESTING THE OPERATION OF THE DEFROST SWITCH IN AN AIR CONDITIONING UNIT
The present invention is an improvement in air conditioning system and comprises apparatus for testing the defrost switch in the air conditioning system. The apparatus comprises a pressure...
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3789669 |
SHIRT POCKET REFRIGERATION GAUGE
Briefly stated, the present invention contemplates a pocket instrument useful in a refrigerator compressor system. This instrument measures the pressure on the high and low sides or stages of the...
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3771321 |
MODULAR AIR CONDITIONING EQUIPMENT
In air conditioning equipment having a compressor motor, a fan motor, and electrical circuitry for controlling the operation of the compressor and fan motors, a removable module fits into a...
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3759062 |
RECEIVER DRIER HOUSING FOR AUTOMOBILE AIR CONDITIONING SYSTEMS
Air conditioning and refrigeration systems, particularly a precharged receiver drier housing, including a valve connector port at the top fittable with a conventional air conditioning or...
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3753356 |
MEANS AND METHOD FOR DETERMINING THE LIQUID REFRIGERANT CHARGE IN A REFRIGERATION SYSTEM
Dual sight glass system in the liquid line of a refrigerant circuit. One of the two sight glasses is disposed in the line at a receiver inlet and is inspected to determine the presence of liquid...
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3752185 |
REFRIGERANT SIGHT GLASS
A generally cylindrical centrally bored housing is coaxially secured at one end portion within a short length of copper tubing. The other end of the copper tubing is contoured for connection with a...
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3736765 |
APPLIANCE INCLUDING ELECTRIC DIAGNOSIS MEANS
A household appliance including a plurality of electrical components is provided with readily accessible multiple circuit connector means for quickly checking and diagnosing the quality and...
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3707851 |
REFRIGERATION SYSTEM EFFICIENCY MONITOR
A monitor for monitoring and comparing the efficiency of operating conditions in a refrigeration system is disclosed. The monitor includes a first and second sensing means, such as thermistors, for...
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3686954 |
AUTOMOBILE AIR CONDITIONER TEST AND SERVICE EQUIPMENT
Electronically automated equipment utilized for diagnostic evaluation and repair of automobile air conditioning systems. Test connections provide sensors to measure the various pressures and...
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3594752 |
CONDITION SENSING AND ALARM UNIT AND CIRCUIT THEREFOR
A readily mountable self-contained temperature sensing and alarm unit having a housing adapted to be mounted on the outside of a refrigerator truck, trailer, railroad car, or other refrigerated...
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3592018 |
PILOT OPERATED AUTOMATIC EXPANSION VALVE
In the preferred form, a vertical receiver housing incorporates a receiver entrance and an outlet fitting at the top and an inlet fitting at the bottom of a vertical evaporator. A coaxial tube...
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3544276 |
REFRIGERANT SAMPLING AND TESTING DEVICE
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3525231 |
REFRIGERANT CHARGE LEVEL INDICATOR
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3498069 |
METHOD OF EXTRACTING HEAT FROM ARTICLES WITH AN EBULLIENT LIQUID FREEZANT
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3470705 |
DOMESTIC WALK-IN COOLER
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3448589 |
MILK COOLING AND COLD STORAGE APPARATUS
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3410105 |
Air conditioner
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3313117 |
Dense gas helium refrigerator
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3297857 |
Heating control system
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3280620 |
Leak detection in vacuum jackets
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3264835 |
Method of and apparatus for removing parts of a refrigerating system
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3243969 |
Arrangement and method for charging refrigerant into a capillary-controlled refrigeration system
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3225555 |
Moisture indicator cap for refrigerant systems
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3191397 |
Refrigeration system including charge checking means
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3188832 |
Portable refrigeration and water purifying apparatus
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3142287 |
Refrigerant moisture-liquid indicator assembly and cap unit therefor
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3139103 |
Fusible plug
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3122124 |
Fluid moisture indicator
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3108566 |
Liquid-moisture indicator
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