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CP or WATTS Marks
Socket Bead/Rib/UNO
Catalogs & Ads
Patents
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Bulb & Socket Bases
View images of the most well known bulb and socket bases

Socket & Electrical Manufacturer's Items And Their History
GECO Sockets
This section will allow you to date and learn how to tell one GECO socket from the other.
Hubbell

This is where this site started from. Since this page was done, there has been much more Hubbell history and information found which will make for a complete redesign of this page and section in the soon future.
Hubbell Patents
This section has some early patent research on Hubbell. It is mostly complete with only a few missing patents which will be added in when this section is re done into the new format
Wheeler Reflector Co.
A history of The Wheeler Reflector Company and tips on how to tell if mirror has been replaced on a shade
Other Manufacturers

This section is a lot of incomplete work and will be updated shortly. For now it serves to give you some extended information on some companies, but will be a much better tool when it is complete
NEC
This section is everything you ever wanted to know about the National Electrical Code (NEC) but had no one to ask. Downloads of old NEC's, meetings and much extended information is provided.

Cord Balls & Adjusters

My cord pendant adjuster project, as well as a good history about them.
GECO Sockets

More companies will be added to this list in the near future. We will also be adding a new list of post 1900 sockets and items.

Bergmann & Co.

Brush Electric Co.
Bryant Electric Co.
Crown Elect MFG Co.
EE&S
Holmes & Gale (HG)
Perkins
Thomson-Houston
Westinghouse
Tutorial And Early Lighting History


The Lighting Time Table

To read the entire tutorial, you can just click on the first link and then continue to the next section at the bottom of each page. Or, you can select links below of interest to you.

PRE 1900 SECTION

Overcoming Obstacles

About Early Electric Lighting, Generators, Arc Lamps, The First Edison Socket, Menlo Park, etc.
The First Fixtures
About The Start Of The First Incandescent Lighting Fixtures
Light Reflection
About Early Light Bulbs And Candle Power vs. WATTS
Edison-Bergmann
About Sigmund Bergmann And The Start Of Bergmann And Company Lighting Fixtures
Lighting Break Down
A Quick Break Down Of Different Lighting Time Periods
Styles 1881 to 1884
Bergmann Fixtures And Styles
Other Pre-1888 Styles
About Early Companies That Sold Lighting Systems And The Fixtures That They Sold With Their Lighting Systems
The U.S. Elect. Co.
The United States Electric Company History And Early Items
The Brush Elect. Co.
The Brush Electric Company History And Early Items
Thomson-Houston
The Thomson-Houston Electric Company History And Early Items
Westinghouse
About The Westinghouse Manufacturing Company History And Early Mergers
Mid 1880's Styles
About The Start Of Electrical Supply Houses and how new lighting styles came about
Pre 1900 Sockets
About Early Light Sockets And How To Tell The Difference
1887 New Items
1888 New Items
1890 New Items
1891 New Items
1892 New Items
1893 New Items
1894-1896 Items
1897 New Items
1898 New Items
1899 New Items
Above are catalog items sold in different years. There is no space to duplicate items, so only new and unique items from each year are shown. You would need to view the catalogs for yourself to be complete as I am only highlighting items. You can view catalogs here.

EXTRA INFO
Victor Shade Holder
About The Victor Shade Holder, Atwood And The Standard Holder

I.P. Frink 1899 Items
About Frink & Wheeler
New Wheeler Inverted
Three Links About Mirror Reflector Manufacturers And Their Items And History.
Wheeler Reflector Co.
NEW - A history of The Wheeler Reflector Company and tips on how to tell if mirror has been replaced on a shade

Early Desk Lamps

Some Help In Telling Them Apart

Vitrite And Luminoid

About The Vitrite Holders And Early Vitrite History

Brush-Swan Holder

About Brush-Swan Shade Holders

Cord Balls
My cord pendant adjuster project, as well as a good history about them.

POST 1900 SECTION

About 1900 Styles
This section covers a basic into into the 1900 section covering information about the 1899 transition, electrical code changes, lighting influence, sharing and licensing of patents and then into the new section of electrical specialty manufacturers,

Electrical Specialty Manufacturers
Harvey Hubbell
This section covers some early history periods of pre Hubbell-Grier, Hubbell-Grier, Harvey Hubbell, Hubbell Company. It also covers a number of items that helped change lighting styles,

Benjamin
This section covers some early history periods for the Benjamin Electric MFG. Co, as well as a small section on Dale and The Federal Electric Company

Dale
Federal Electric

This post 1900 section continues to be under current construction

Please Check Back.



BERGMANN & COMPANY
1881 to 1889


This Bergmann section is to be the complete socket research for all early Edison sockets, as well as the complete lineup of sockets invented or manufactured by Bergmann & Co.. It also serves as the complete lineup of sockets manufactured by the Edison General Electric Company.

Also included is the complete lineup of sockets for the
early part (1892-1894), of the General Electric Co..
Later G.E.Co items (1895 and later) can be found in the geco section linked below.


More
historical information about the Bergmann and Edison companies can be found at the links below:
In the lighting timetable section Overcoming Obstacles there is a good section on Edison & Bergmann history
In the "others" patent area covering basic Bergmann history and some patents
In the geco section a small mention about the starting of the EGE company and Edison-Bergmann
In the geco history section there is a good write up on Bergmann/EGE history and the Thomson-Houston merger

How Edison Fits Into This "Bergmann" Section
I am not as well versed on the early "Edison" sockets (or history) at this time, but it is pointless starting this Bergmann section without a semi-detailed history of their origin.

Without the research and historical history below, their would undoubtedly be a subconscious gap in the readers mind.

This would be because sockets Invented, manufactured by, or marked with the Bergmann & Co. name, start at such an early date, that the Edison items shown on this page can become more of a 'missing link' to some of the Bergmann items. Also Edison was a part owner of Bergmann & Co., which even makes it harder to make a clear cut decision as to what is actually to be called "Edison" or "Bergmann".

There are also some other dilemmas to consider, that we simply do not yet have the answers for. Sometimes we just need to wait for new historical evidence to surface.

When trying to bridge the gap between 'Edison' sockets and 'Bergmann & Co.' sockets, there are many things to consider..


Bergmann Left - Edison Right
Bergmann was a long time friend of Thomas Edison. He (and E. H. Johnson) had already been manufacturing other Edison inventions and working for and with him for well over a decade before Bergmann & Co. was formed. It was a partnership between three long time friends (T.A. Edison, S. Bergmann and E.H. Johnson), designed to invent, manufacture and sell Edison sockets and wiring devices.

Bridging The Gap Between Edison & Bergmann Sockets

How does the reader of this page wish to bridge the between Edison and Bergmann sockets?

In the end, it all comes down to the personal preference to each individual as to what they term as a "Bergmann" or an "Edison" and their reasons why.

Who's invention was it?
Who's name is on the patent?
Was the patent assigned to a company?
Who manufactured it?
Who sold it?

Examples:
If it was invented and patented by Johnson before the partnership, but then manufactured and sold by Bergmann & Co. after the partnership, is it to be called a Bergmann, Edison, or a Johnson?

Or, lets say that Edison invents and patents a socket (before the partnership) which includes a screw shell design; And then Johnson invents a socket which includes a new part, such as a switch (shows but does not claim the Edison screw shell in his patent); and then Bergmann takes out a patent for a new center contact (also before the partnership or in his own name).

Now later, after the partnership, lets say that we see "Bergmann & Co." selling a socket with Edison's screw shell, Johnson's switch and Bergmann's center contact. What do we call this?

Reminiscing & Hearsay Vs. Documented Fact

I am not one to argue over such fine details and leave it up to each person to come to their own conclusions as to: Which of the sockets in this research section (that most people strictly call "Edison" sockets), were actually invented by or manufactured by either Bergmann or Bergmann & Co.; Or the question of if Bergmann manufactured all of Edison's sockets from day one; Or where to draw the line between what we would call an "Edison" socket and a "Bergmann" socket; Or if we are to draw a line at all.

What it all comes down to are the questions of:
What is actually documented?
What is to be considered hearsay?
Where are we lacking documentation?

For documented evidence we have patents which may include assignees, dates, illustrations, notes, etc..
Also note that there are some patents from other inventors, authors, or manufacturers that may provide illustrations which can prove to us that a particular item existed at the time of filing a patent or publishing. An example of this would be a patent for a shade that just happens to picture it on a lamp with a socket. While they are only claiming the shade in their patent, the socket that they show must had existed at the time of the patent application, because the illustration shows it. This also goes for books that may have been published during certain dates that show pictures or drawings of electrical items. We also have old catalogs that can provide some limited information and documentation providing the catalogs have been updated properly when considering ending dates, but these are always good for starting dates. Having consecutive catalogs numbered by years is always a good help to see the entire scope, as to if they are updating their illustrations in new catalogs. We also have city directories, and various other documents we can use when available for dating company addresses in publications.

While the above is considered good documentation, there are other resources that can not be as concrete when it comes to direct evidence. Publications that mix "reminiscencing" with documentation, cause the reader to try and filter out true facts from hearsay.

One example of such a work would be a collection of "Reminiscences" written by Francis Jehl who worked with Edison at the Menlo Park laboratory in February, 1879 (until 1881 and over 40 years after running things in Europe). In 1937, he started writing a three volume book describing his work under Edison and life in Menlo Park during the Edison years. The book was written in Edison's restored Menlo Park laboratory, which he claimed help him bring back many memories. It is important to note though, that this Jehl book is best for only early memories starting in 1879 and until 1881 (and even then only limited).
 
Francis Jehl
Between these dates the work is simply research that Jehl had done and called it his "Reminiscences" of which it was not, seeing he was not working for Edison until 1879 and outside of the USA after 1881. The book also being an obvious one sided work, which when controversy arises the other side is not pointed out. Also in some cases deliberately leaving out entire bits of history as to make people look good or hide sad facts).

The best example of this would be the Bergmann/Edison falling out which happened in late 1888. The only point that I make is that it was never mentioned in the Jehl book that this ever happened. In Jehl's mind, Edison & Bergmann always remained close lifetime friends. In one area Jehl quotes:

"Edison once said laughingly: "I got all the glory, and Bergmann all the money." AND "Years later, when Bergmann, the millionaire, left America, Edison wrote him a nice letter which contained the following. "You have nothing to thank me for, as hundreds of others of my companions and employees have had the same chance. Your commercial success was your own doing and I only gave you the opportunity."


While Jehl goes out of his way to make it 'look like' everything was always fine between them, It is important to note that Edison in a letter to Bergmann denied all claims to making such a statement about making him rich. In the Edison letter it states

"I have never yet said anything that I would not say to your face. 1st, I never said that I had made you rich"
. As to Bergmann's 'success' Edison in context also says:"I have always done everything to help every one of the boys; I have always been glad they were getting wealthy; the more they made the better it pleased me; I am glad you are well fixed; would not do a thing to prevent you making money; all of the money you have you made yourself by your own ability; that you had a chance to exercise that ability was due to me; you have been worked up to a state of dam foolishness by your enemies, of which you have a very choice and extensive collection."

(I have linked the collection of Bergmann and Edison letters on this topic here).

The book was completed in 1941 and published by the Edison Institute, Dearborn, Michigan (Copyright 1937-1941). While this is a great read (I recommend everyone to read it, but be sure to get the entire three book set), but, as shown above, we can not take every word as like a divinely inspired gospel. People make mistakes; Don't always remember things correctly; Or simply heard it wrong. There are however some good documented topics and illustrations. There are also many other publications that are good reading that document their sources in foot notes, which are also good as long as you can get access to those sources to be sure that they are quoted in context.

Now back to what we are talking about, which is, reminiscing and hearsay vs. documented fact.

First, I must say that I have no doubt in my mind, that Bergmann or Johnson were at least involved in the manufacture of most wiring devices (including the early days). But, it would be impossible to make clear rules without the proper documentation, or to attempt to make the cut between 'Bergmann himself', others with Bergmann and then "Bergmann & Co.".

We have the actual early sockets to go by (which are not marked with patent dates or company names), then we have the later sockets that are marked with patents, and then even later sockets that are marked with both the patents and the Bergmann & Co. name. It would be easy to say sockets not marked are "Edison" sockets and those that are marked are "Bergmann" sockets, but this would be all fantasy to even think that it could be this easy.

Jehl says "At the onset the sockets and other parts were manufactured by Bergmann & Co., of which the three partners were Bergmann, Edison and Johnson". (Menlo Park Reminiscences vol. 2 page 743)

The "onset" would imply the Edison No. 1 as well as the first screw shell (#2 on this page, reminisced by Jehl as the bang-up socket in late 1880, but patent applied for March 7, 1881 with Edison's name is on the patent).

But, first, lets deal with hearsay and reminiscing vs. documented fact.
A good example would be in vol. 2 page 744 where I make two quotes from that page:

"Then when Edison commenced introducing his light, heat and power system the firm of Bergmann & Co. was formed, Edison contributing ideas help and goodwill."

In speaking about Bergmann:

"I don't recall how Johnson became his partner; I suppose that under the circumstances it was a case of force major. Concerning Edison's partnership in the concern let me relate in the words of Charles L. Clark, veteran pioneer: How Edison became a partner in Bergmann & Co. has an amusing side, told me by Bergmann with some feeling of disappointment and chagrin, for he strongly had the dollar-in-pocket instinct. One day, after Bergmann & Co. (Bergmann and E.H. Johnson, partners) were making the Edison light fixtures, sockets, switches, etc., Johnson, with his bold promoter assurance (Bergmann was there), asked Edison how he would like to become a third equal partner with them. Of course, Edison jumped at the chance and inquired "For how much?" At which Johnson (wise man) said: "For nothing but goodwill." There was a warm handshake to close the bargain, although it must have given Bergmann chills, for he said to me in telling the story, "Edison would have been glad to pay us fifty thousand dollars!" Menlo Park Reminiscences vol. 2 page 744

So here we first have Jehl making a statement that Edison contributed "ideas help and goodwill" into the partnership.

This statement and 'belief' of Jehl's is clearly from the third party communication from Charles L. Clark who says he heard it from Bergmann. Keep in mind that this was a story being told and then passed down from person to person. Also all of the details were likely not disclosed. Who really knows the circumstances that it was being told under, or to how many people were listening, etc. Also, obvious private parts being left out of the story. Jehl making the statement "I don't recall how Johnson became his partner" is simply comical and had me almost rolling on the floor laughing, since Edison introduced Johnson to Bergmann in the mid-1870's and Jehl did not start working for Edison until 1879.

There is no doubt in my mind that this is most all to be considered hearsay for the following reasons based on documented fact.

Clark quoted:
1. Johnson "asked Edison how he would like to become a third equal partner with them"
2. Edison asked "For how much?" At which Johnson (wise man) said: "For nothing but goodwill."

From a draft of the agreement between Edison, Bergmann and Johnson dated April of 1881:

"Edison is to receive forty four parts of each dollar of profit earned in consideration of furnishing the said sum of seven thousand five hundred dollars, the said Bergmann is to receive forty four parts of each and every dollar and the said Johnson is to receive the remaining twelve parts of each and every dollar".
Edison Bergmann Johnson Agreement dated April 1881 (broken link)

So here we have two conflicting statements. Clark says the partnership did not cost Edison anything, and that it was to be an equal partnership between the three of them. In contrast, the agreement has Edison paying $7000.00 into the partnership for 44% of the stock. Bergmann also owns 44% and Johnson 12%, which is not the equal partnership that Clark is talking about.

On another note there is first a statement by Jehl "I don't recall how Johnson became his partner" which implies that there was a previous partnership between Johnson and Bergmann. Also in Clarks quote "(Bergmann and E.H. Johnson, partners) were making the Edison light fixtures, sockets, switches, etc., Johnson, with his bold promoter assurance (Bergmann was there), asked Edison how he would like to become a third equal partner with them." The agreement of April 1881 surely does not support a concept that a 50/50 partnership existed between Bergmann and Johnson since in this agreement he is only now a 12 percent partner.

Johnson worked for the "S. Bergmann" company (since the 1870's) prior to this agreement and was a 12% partner in Bergmann & Co. after it was formed in April of 1881. About a year and a half later in September of 1882 he did however become a third and equal partner with 33% stock (when first agreement was terminated for unknown reason(s).

The old agreement terminated on September 2nd of 1882, at which time a new agreement (broken link) took it's place.
The official 1882 document is linked above and the draft for it here (broken link).

Noteworthy is the fact that even this later document greatly conflicts with the statements made by Francis Jehl and Clark, in that it cost Edison even more money then in the first agreement.

"The style of the firm shall be "Bergmann & Co."... Edison shall contribute to the firm the sum of thirty eight thousand two hundred and ninety dollars and forty nine cents in cash, the said contribution to the new firm being the price which he pays for buying a one third interest in the aforesaid business...and the receipt of thirty five thousand dollars in part payment of said sum is hereby acknowledged by said Johnson and Bergmann." Edison Bergmann Johnson Agreement dated September 2nd 1882 (broken link)

There is also documentation in a signed 18 page letter from Bergmann to Edison dated November 20th 1888, where he is quoted saying to Edison "At that time I asked you to come in as a partner in Bergmann & Co.which you did and paid $38,000.00." Notice here that it does not say that "Johnson asked you to come in" as it was 'reminisced'. Also note that in this long Bergmann letter that many such statements were made, in which Edison made a reply and was careful to point out each statement that Bergmann made that was in error. Edison made no correction as to who asked him to become a partner.

As for the first agreement, also note that it is solidly documented that the firm "Bergmann & Co." started it's existence directly after the first agreement in 1881. This is proven by noticing that all of the stationary prior to the 1881 agreement (invoices and letters) used the letterhead of the "S. Bergmann" company; and after the 1881 agreement used "Bergmann & Co." letterhead as shown below.

This is a part of an agreement draft in 1881, that was actually made on the current stationary about the same time as the first 1881 agreement.

Now soon after the 1881 agreement, I show (only two out of hundreds of examples) an example of one Bergmann & Co. letter and one invoice:



Example of Bergmann & Co. Letterhead Dated Oct. 12 1881




Example of A Bergmann & Co. Invoice Dated Nov.15 1881

The point of all of this being, that you can not trust EVERYTHING you read!

This socket research section will be based on actual fact to the best of my ability.
If a statement has been reminisced, I will be sure to either say so or go out of my way to document it as fact before presenting it as such.

The Key To Understanding The Socket Research Below


NUMBERING OF SOCKETS
In this research in this section, I will refer to "Bergmann & Co." sockets as those that are without any doubt a total Bergmann & Co. invention. I will make a clear difference in naming them and start the BERGMANN NO. 1 SOCKET with the first actual socket known to be a complete Bergmann & Co. Invention This is even though there are other sockets named for example "Edison No. 3" or "Edison No. 4' that were either undoubtedly manufactured by Bergmann and / or, share partial patent claims.

EDISON VS BERGMANN
When dealing with sockets manufactured after April of 1881 it should be noted that there is really NO REAL DIFFERENCE between items manufactured by "Bergmann & Co." and should be considered no different then EDISON system sockets. This is because Edison was a partner in the company and did not manufacture sockets for his electrical systems from any of his other manufacturing companies.

More accurately these should be called EDISON-BERGMANN items until those manufactured after April 24, 1889.

Edison consolidated his electric companies in 1889 (which included Bergmann & Co.) into a new company called "Edison General Electric". After this, Bergmann no longer played a part in the the new company (as he went on to invest in other new 'NON-Edison' ventures).

So, now we have "EDISON-ONLY" Items from April 24, 1889 until April 15, 1892.

In 1892 there was another merger with Thomson-Houston in which those that owned stock in "Edison General Electric" were paid off (including Edison) and the company was merged. Thomson-Houston (now owning Edison's name for electrical) created a new company called "General Electric" and merged all of their electrical companies into it (also, at which time Edison himself was no longer part in the company).

So, to be quite clear, we now have NON-EDISON items from April 15, 1892 until present time.
Items after 1892 would be called or marked General Electric Co., G.E. or G.E.Co..

SOCKET LINEUP - Socket numbering and timelines through company life times

I will also deal with sockets in timelines for particular styles or designs.
For example, one socket style such as the "Acorn" socket, started as an 1882 Bergmann design and invention, which was then slightly changed when it became an "Edison General Electric" item. Also when "General Electric" came out with their socket line, they made some slight changes and came out with their own acorn socket. So, in cases like this, I will deal with the complete lineup of acorn sockets starting in 1882; And then moving through each of the three companies until the last documented change. This will now give us a lineup of Acorn sockets such as No. 1, No. 2, etc., but some of them being documented as Bergmann, E.G.E. or G.E. sockets in the line up.

Now with all of this being said, we will get on to the actual socket research.

SOCKET RESEARCH SECTION

To continue to the socket research part of this page:
Click Here http://www.antiquesockets.com/bergmann2.html