Patents on my 38CF

coldspaces
27 Cubic Foot

Posts: 3,091

Patents on my 38CF Sept 11, 2013 5:05:29 GMT

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Post by coldspaces on Sept 11, 2013 5:05:29 GMT

Here are the patents that are listed on my CF machine. Thought they might help others.

# Title Subject Original Assignee

1456110 Electrical device seal. compressor terminals General Electric Co

1633805 Heat-resisting alloy General Electric Co

1698306 Refrigerating machine Compressor mounting method General Electric Co

1732092 Refrigerating apparatus Evaporator Frigidaire Corp.

1812748 Dynamo electric machine Motor for compressor? General Electric Co

1823004 Refrigerating unit refrigeration apparatus to Kelvinator Corp.
maintain comparatively low temperatures

1833846 Air cooling and water freezing Evaporator Edwin B H Tower Jr
evaporator for mechanical
refrigerating apparatus

1864678 Compressor for refrigerating machines Compressor General Electric Co

1891728 Refrigerator unit Evaporator Kelvinator Corp.

1921126 Combined automatic and Relay, overloads & cold control unit General Electric Co
manual circuit controller

1928467 Electric gauge gauge for machining accurate parts General Electric Co

1947274   Permanent magnet and permanent magnet cast alloy, used in motors? General Electric Co
method of making it

1955702 Float valve for refrigerating What material used for seat tube & linkages General Electric Co
systems (Low heat conducting Monel) & Float positioned
to take advantage of cooling effect at seat.

1992835 Method of bending conduits Methods to form conduits in evaporators    General Electric Co

1996599 Repulsion relay Start relay General Electric Co

1996606   Repulsion relay Start relay General Electric Co

2002444 Refrigerator evaporator General Electric Co

2027313 Refrigerator Mounting of float valve to minimize heat transfer. General Electric Co

2027997 Permanent magnet containing copper Mishima Tokushichi

2028584 Refrigerating machine Compressor General Electric Co

2032926 Electrical contact General Electric Co

2039053 Refrigerating machine Compressor General Electric Co

2042493 Flooded evaporator General Electric Co

2043849 Valve assembly Compressor valve   General Electric Co

2043917 Evaporator for refrigerating machines General Electric Co

2046943 Evaporator for refrigerating machines General Electric Co

2049364 Refrigerating system and method of charging the same General Electric Co

2050883 Temperature control device General Electric Co

2060663 Processing graphite   General Electric Co

2071182 Refrigerating machine condenser General Electric Co

2071183 Refrigerating machine condenser General Electric Co

RE-18168 Refrigerator Evaporator Westinghouse

RE-18253 ? Evaporator Delos P Heath (inventor)

Re-18621 Evaporator for refrigerating systems Chicago Pnstjkatic tooi Company

RE-18851 ? Evaporator Alpbed W Mellowes (inventor)

Re-19778 Method of making evaporators Thomas J Litle (inventor)

The one on the float is real interesting. Explains all the length it goes to to slow heat transfer from the hotter parts of the float. Says the tube the valve seat is in and other parts like the linkage were made of Monel metal for low heat transfer. Also talks about how it was positioned inside of the cabinet to take advantage of the cooling effect of the instant vapoazation of some of the refrigerant as it drops in pressure going through the valve. Sounds like flash gas.

Last Edit: Sept 12, 2013 1:44:22 GMT by coldspaces

I don't own too much old stuff,I just temporarily take care of it for its next owner.

"Hell, there are no rules here--we're trying to accomplish something!"
Thomas A. Edison

We never really grow up, we just learn how to act in public.

ChrisJ
Administrator

Posts: 2,502

Patents on my 38CF Sept 11, 2013 10:32:46 GMT

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Post by ChrisJ on Sept 11, 2013 10:32:46 GMT

Interesting.
Last time I did a search for Monel everything I found was silver colored. I believe its mainly Nickel.

The other thing I just realized was on the later units the float bowl is actually inside the refrigerator instead of outside. I guess the heat wasn't that big of a deal afterall?

CA-2-A16 S/N 3326603 Porcelain cabinet with right hand door and capillary tube conversion. Restored and in use.
CA-2-B16 S/N 4126576 Painted cabinet with left hand door. Has bad float valve and needs paint.
CA-2-B16 S/N 41-944-942 Porcelain cabinet with right hand door. Has cracked liquid line, bad float valve and needs paint.
CK-2-B16 S/N 5320471 top only currently being restored

cablehack
Administrator

Posts: 2,023

Patents on my 38CF Sept 11, 2013 23:50:22 GMT

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Post by cablehack on Sept 11, 2013 23:50:22 GMT

Thanks for listing them...the Kelvinator one has me intrigued...not sure how it applies to a domestic fridge, and why GE would use something from a competitor.

Good observation about the float chambers, Chris. From what I see in the manual, the FBA went so far to have the whole chamber, charge valve and all, at the back of the evaporator. All that warm liquid must not be causing any problem. So, it seems no need to worry about insulating capillaries and filters for the CA. I'm sure I read somewhere recently that there was actually an advantage in having the float chamber in the cold area. Help the gas condense back into liquid??

CA-2-B15 s/n 4328374
CA-1-B15 s/n 4326047

ChrisJ
Administrator

Posts: 2,502

Patents on my 38CF Sept 12, 2013 0:24:51 GMT

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Post by ChrisJ on Sept 12, 2013 0:24:51 GMT

Maybe it helped stop flash gas.

Speaking of that, ever notice the CA B machines have the valve seat much more in the cabinet than the CA A machine? Maybe this just happened because the float bowl sunk more into the box top, or maybe it was on purpose.

CA-2-A16 S/N 3326603 Porcelain cabinet with right hand door and capillary tube conversion. Restored and in use.
CA-2-B16 S/N 4126576 Painted cabinet with left hand door. Has bad float valve and needs paint.
CA-2-B16 S/N 41-944-942 Porcelain cabinet with right hand door. Has cracked liquid line, bad float valve and needs paint.
CK-2-B16 S/N 5320471 top only currently being restored

coldspaces
27 Cubic Foot

Posts: 3,091

Patents on my 38CF Sept 12, 2013 1:02:46 GMT

Quote

Post by coldspaces on Sept 12, 2013 1:02:46 GMT

From the way the float patent reads they were very concerned about getting advantage from the extra cooling that sounds like was caused by flash gas. Also with heat transfer from the cool seat area to the rest of the float.

Maybe the entire float was placed inside to cool the liquid extra. Should do the same thing as a heat exchanger as far as helping prevent excessive flash gas.

I don't own too much old stuff,I just temporarily take care of it for its next owner.

"Hell, there are no rules here--we're trying to accomplish something!"
Thomas A. Edison

We never really grow up, we just learn how to act in public.

coldspaces 27 Cubic Foot Posts: 3,091	Patents on my 38CF Sept 12, 2013 1:45:27 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by coldspaces on Sept 12, 2013 1:45:27 GMT Have all the patents listed that were on the label now. More on float mounting and other great subjects.
	I don't own too much old stuff,I just temporarily take care of it for its next owner. "Hell, there are no rules here--we're trying to accomplish something!" Thomas A. Edison We never really grow up, we just learn how to act in public.

cablehack
Administrator

Posts: 2,023

Patents on my 38CF Sept 12, 2013 3:48:04 GMT

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Post by cablehack on Sept 12, 2013 3:48:04 GMT

2049364. This patent answers the question about the extra tube from the float chamber that I remember Allan asking about with the DK.
It provides access to both the low and high side, through the one charge valve while the unit is evacuated, and then is pinched off.

I wonder therefore, if there was some problem or difficulty evacuating the systems before they introduced the bypass tube.
In the case of the CA machine, I assumed that the compressor check valve provides access to the low side when the unit is vacuumed, and it appears to be thus in practice - although ChrisJ's rebuilt CA also has the bypass tube.
Perhaps things work differently with the Scotch Yoke compressor. Note the fridge in the patent is an LK.

Last Edit: Sept 12, 2013 3:51:38 GMT by cablehack

CA-2-B15 s/n 4328374
CA-1-B15 s/n 4326047

coldspaces
27 Cubic Foot

Posts: 3,091

Patents on my 38CF Sept 12, 2013 4:41:46 GMT

Quote

Post by coldspaces on Sept 12, 2013 4:41:46 GMT

Even more glad I posted all of these # now. I had no idea this question would be answered as I have not had the time to read all of these through. Keep digging I am sure there is much more to learn. I believe there is a total of 36 patents listed, most I have yet to fully read and understand.

I don't own too much old stuff,I just temporarily take care of it for its next owner.

"Hell, there are no rules here--we're trying to accomplish something!"
Thomas A. Edison

We never really grow up, we just learn how to act in public.

cablehack
Administrator

Posts: 2,023

Patents on my 38CF Sept 12, 2013 5:36:54 GMT

Quote

Post by cablehack on Sept 12, 2013 5:36:54 GMT

1996599 is the E3 relay used in the CA, and first generation CK and LK machines. Your CF has been a very useful source of info

As these patents were granted after the CA's were made, it's taken a much later model to list them. I suspect there might be more CA and early Scotch Yoke stuff in this listing that wasn't listed on the actual machines. One has to wonder what's listed on a 1942 model.

Going back to the float valve patent 2027313, which is really the CF patent, now that I've actually read it, it turns out to contradict what I thought before. That rubber boot which gets mentioned in the service manual is actually the heat insulator, and an important part.

Last Edit: Sept 12, 2013 6:05:27 GMT by cablehack

CA-2-B15 s/n 4328374
CA-1-B15 s/n 4326047

coldspaces
27 Cubic Foot

Posts: 3,091

Patents on my 38CF Sept 15, 2013 5:03:25 GMT

Quote

Post by coldspaces on Sept 15, 2013 5:03:25 GMT

Sept 12, 2013 5:36:54 GMT cablehack said:

One has to wonder what's listed on a 1942 model.

Can't help you on the 1942 model but I do have the 1948(I think) GE Spacemaker so I went and looked and there are some of the same and some new patents. I have only checked the first of the new so far # 2053117 and it looks like it is a Dr evaporator patent so I will list them all and see what we find for our older machines.

These first ones are a repeat of ones I found on the 38
1823004
1833846
1928467
2002444
2046943
2060633

New ones I found on the 48
2053117 Drawing looks to be of a DR evap.

2060633 Evap.

2085995 Covers how enamel wire for winding motors was made

2019986 More on enameled wire

2117861 Evap.

2133875 Intake muffler for compressor

2133876 More on an intake muffler

2137861 DR evap construction

2255512 Evap.

2307588 More on wire

2339048 Improved compressor assembly minimizing pressure loss and piston clearance loss

2394409 Compressor for the 48

RE-18621 Evap- optimized for Ice production?

Wow I have not even read much of these yet, mostly looked at the drawings. I am impressed at just how many of these on the 48 are from the monitor tops. Just helps show how ground breaking the monitor top refrigerating machines were I guess. And buy the way I think all of these but one were assigned to General Electric originally.

Last Edit: Sept 16, 2013 4:49:58 GMT by coldspaces

I don't own too much old stuff,I just temporarily take care of it for its next owner.

"Hell, there are no rules here--we're trying to accomplish something!"
Thomas A. Edison

We never really grow up, we just learn how to act in public.

coldspaces
27 Cubic Foot

Posts: 3,091

Patents on my 38CF Sept 15, 2013 5:34:32 GMT

Quote

Post by coldspaces on Sept 15, 2013 5:34:32 GMT

Now this kinda surprised me, the Monitor Top patents area still active in today's world. After reading more on patent 2053117 I found this major company had referenced it in this century. Pretty cool IMO.

REFERENCED BY
Citing Patent Filing date Publication date Applicant Title
EP1723378A2 * Feb 7, 2005 Nov 22, 2006 Carrier Corporation Two-phase refrigerant distribution system for multiple pass evaporator coils
* Cited by examiner

I don't own too much old stuff,I just temporarily take care of it for its next owner.

"Hell, there are no rules here--we're trying to accomplish something!"
Thomas A. Edison

We never really grow up, we just learn how to act in public.

Post by coldspaces on Sept 11, 2013 5:05:29 GMT

Post by ChrisJ on Sept 11, 2013 10:32:46 GMT

Post by cablehack on Sept 11, 2013 23:50:22 GMT

Post by ChrisJ on Sept 12, 2013 0:24:51 GMT

Post by coldspaces on Sept 12, 2013 1:02:46 GMT

Post by coldspaces on Sept 12, 2013 1:45:27 GMT

Post by cablehack on Sept 12, 2013 3:48:04 GMT

Post by coldspaces on Sept 12, 2013 4:41:46 GMT

Post by cablehack on Sept 12, 2013 5:36:54 GMT

Post by coldspaces on Sept 15, 2013 5:03:25 GMT

Post by coldspaces on Sept 15, 2013 5:34:32 GMT