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Learning Tools And Research Material

User Forums

Post pictures of your items and ask questions or just learn from reading the posts from others

Ad Database
View or upload ads from antique magazines
Bulb & Socket Bases
View images of the most well known bulb and socket bases

Patent Utilities
Patent Linker
Lets You Pull Up Any Patent PDF File Or Link One Directly To Your Web Page
Group Patent Dbase
Lets You Download The First Page Patent Picture Of Every Patent On A Single Day To View On Quickly Your Local Computer
MultiView Search
Lets You Search For Patents Using Advanced Methods And Provides Hyper Links To The Patent Office And Google Patents

I have not had much time to get many items in the forsale area below. Please keep checking back as I will start adding more items soon.

Items For Sale

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


Switch Material

Electrical Code
Mica Insulation
CP or WATTS Marks
Socket Bead/Rib/UNO
Catalogs & Ads
Patents
Pull Chains / Finials
Socket & Electrical Manufacturer's Items And Their History
GECO Sockets
NEW - 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.
NEW - 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.
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.


UNDER CONSTRUCTION


SOCKET & ELECTRICAL DATING TUTORIAL


There are many different methods that can be used to help you date your items or sockets.
This tutorial will help you identify which methods will be best for your item. If your item is post 1900, you will notice that some of these methods will not apply to you. This is because some dating methods may provide a broad date range for some items, such as the date that porcelain started being used for socket switches. On the other hand this method would be more helpful if you were dating a much older socket during the transition of fiber to porcelain.

By browsing these different areas you should be able to identify and narrow down your item close to it's manufacture date. In some cases even within several months.



Before reading this section (if you already know a bit about his topic) you may want to test your knowledge first be taking a short quiz. This way after you are done reviewing this section you can take the quiz again to see how much information that you have retained.

The quiz links below will let you test your current knowledge on this topic.
Be sure to write down your total score.
This way you can come back later to see how much better you do after reviewing this section.



DATING BY SWITCH MATERIAL USED
Wood / Fiber / Porcelain
Switch Material
Wood 1879 - 1882
Vulcanized Fiber 1882 - 1890
Porcelain 1890 - Present
By the year 1883 most manufactures were using vulcanized fiber for switches. Wood continued to be an insulator for fuse cut-outs and other electrical products for years after. Vulcanized fiber came in several colors such as brick red, brown, gray, and black.
Many people mistake the darker fiber materials for hard wood because of the crude finish and some cracking that sometimes comes along with age. By 1890 most manufactures switched from fiber to porcelain.


DATING BY CODE STANDARDS

The National Electrical code of 1899

Lining
Shell
Marking
The inside of the shells must be lined with insulating material, which shall absolutely prevent the shell from becoming a part of the circuit even though the wires inside the socket should start from their position under binding screws. The material used for lining must be at least one- thirty-second of an inch in thickness, and must be tough and tenacious. It must not be injuriously affected by the heat from the largest lamp permitted in the socket, and must leave the water in which it is boiled practically neutral. It must be so firmly secured to the shell that it will not fall out with ordinary handling of the socket. It is preferable to have the lining in one piece.
Metal used for shells must be moderately hard, but not hard enough to be brittle or so soft as to be easily dented or knocked out of place. Brass shells must be at least 0.013 inch in thickness, and shells of any other material must be thick enough to give the same stiffness and strength of brass.






The standard socket must be plainly marked fifty candle-power, 250 volts, and with either the manufacturer�s name or registered trademark. Special large sockets must be marked with the current and
voltage for which they are designed.







By the year 1900 virtually all socket manufactures had adopted these new NEC standards.

From the three selections above, Lining and Marking will be the most common methods for dating.

Marking
As a general rule all sockets after 1900 are marked with a Company name or trademark logo of some kind.
It is also marked with the voltage as well as the CP or WATT.
If the socket shell has no markings it is likely a pre-1900 socket.

Lining
The current socket designs would not allow for the room that would be needed to secure a full insulating liner of the thickness required. This caused the need for almost all manufactures to change the basic design of their socket shells. (see shell design section)
The first socket and liner shown above is an example of the first type of liner. This was a threaded ring that screwed on the end of an Edison style socket base which held the socket firm in place. This threaded ring was still used after 1900, but along with additional insulation that covered the switch. The next type of socket shell liner shown in the second picture, was a small ring that fit into the end of the socket tube. Many times this liner will either be missing, or has moved it's way up and is resting below the bottom of the socket material. The third picture (pre-1900) is a hard ring with a ridge that fit tight into the inside grove of the shell bead. The next two pictures (post 1900) show the progression to the full insulating cover.

Click Here To Enter The National Electrical code Section


DATING BY MICA
History Of Use

History Of Mica Insulation
Westinghouse
Bryant
Hubbell
While not all socket manufactures used mica as an insulator, most all of those that did stopped using it by the year 1910. For dating use, it would be a safe guess that any socket containing mica is a pre-1910 manufactured socket.


DATING BERGMANN / EDISON SLITS
History Of Use

History Of Slits
Once in a while you will come across socket threads with slits cut into them. These were made to help hold the bulb in place and not vibrate loose. The original patent for these slits was applied for on October 18th, 1889 by the Edison Lamp Company. The patent was approved on April 15th, 1890 and assigned patent no. 425741. This invention can be a great tool for proof of an early EGE socket. This is because Edison/Bergmann merged into Edison General Electric in 1889, and fiber stopped being used in 1890. If you have a socket that is marked Bergmann but has the slits, it would be right at the time that this patent was applied for. If you have a fiber socket, in a shell marked EGE and it has these slits, it would be right at the time of the merger.

After the next merger in 1892, G.E. continued using these slits on their sockets until 1895 and then only on some selected sockets after 1895.

This slits are now known after so many years to cause problems. Two things to watch out for would be cracking below the bottom parts of the slits and broken or cracked hard rubber collars, which is common on these sockets once the base is cracked.

A perfect EGE socket slit is shown above to your right, and a cracked one center on your right.


Also note that these slits were used on some Edison based sockets made by some other manufacturers such as EE&S. You can also find these slits on some post 1900 items that were licensed to use the Edison base. A good example is the Westinghouse to Edison adapter shown on your right (patent 796922).

You can see more examples of slits in the Bergmann ID section as well as my 1900 lighting time table under Hubbell where slits were used on a pre-1900 Hubbell socket.


Perfect Condition

Crack Caused By Slit

1905 Adapter Using Slits



DATING BY SHELL MARK C.P.
C.P. vs WATTS

May 1st 1910 - Change In Standards
Pre 1910 Socket Marked 50 C.P.
Post 1910 Socket Marked 250W
On May 1st 1910 an official change was made when it comes to how lamps were rated. A new wattage system was adopted and the older candlepower rating was abandoned. This marks the year that sockets no longer were stamped with the C.P. mark and the year that sockets began being marked with WATTS.
1899 marked the year that the NEC began requiring all socket shells to be marked with the CP rating. This leaves us a common date range that if a socket is marked with the CP rating it will likely be within the date range from 1900 to 1910. If it is marked WATTS it was manufactured after 1910.
If there is no mark on the socket at all it is a pre 1900 socket. (See the national code standards section NEC)


DATING BY SOCKET TUBE
Bead / Rib Vs UNO Threads


Ornate Bead / Rib
Post 1900 Shell
With Bead / Rib
Early European Shell
No RIB or UNO
Pre-1900 Long Shell
With Bead / Rib
Post 1914 Shell
With UNO Threads
Later European Shell
With Ornate
Bead / RIB
Pre-1900 Ornate Shell
The first picture shown above is of the ornate beaded shell (extra short). There were two styles of this shell. The first showing up in 1886 which was about 2.2" from the top of the cap to the bottom of the shell. The shorter shell measured 2.0" and most times is only noticed if you stand the two sockets next to each other or measure it. On this site these will be referred to as ornate short and ornate long. The ornate short is a newer style which is thought to have first started being used by EE&S (Electrical Engineering and Supply Company of Syracuse, NY). EE&S was first announced in Electrical World in 1891. About this time Thomson-Houston also came out with an ornate short shell. Because these T-H caps were slightly different in size, they were stamped close to the set screw with either an S (for short) or L (for long). This provides us a narrow date line to identify regular long sockets marked with the T-H 1887 patent date that were manufactured much later and close to the time that they merged with the General Electric Company in 1892. There were not as many of these sockets made, which makes these T-H stamped socket shell caps much more rare.

Pre-1900 Long Shell With Bead / Rib
The first illustrated mention of the regular Pre-1900 long shell is the 1888 Westinghouse catalog.
This style shell lived on being used by many different manufactures until the design needed to be changed in 1900 which would accommodate the new insulation requirements contained in The National Electrical code of 1899.

Post 1900 Shell With Bead / Rib
G.E Co. uses a similar design shell starting in 1895 (first seen in a catalog 1897), but for the most part this beaded shell design began being used by most all manufactures in and after 1900.

Post 1914 Shell With UNO Threads
UNO threads came out in 1914 and by the year 1915 was being used by virtually all socket manufactures.
This is with exception to smaller candle sockets and larger mogul sockets, which normally would not use shade rings.

European Shells
Since these
European shell designs are out there, we have added them to this section to avoid confusion by those that may come across them.


DATING BY CATALOGS
Dated Electrical Catalogs, Bulletins, Distributor Catalogs, Magazines, Ads & Other Printed Material

Trade Catalogs
Socket Ad - Electrical World Magazine December 27 1890

One of the best ways to date items, is to look back into history and see when those items were being sold.
By collecting or viewing catalogs, it is like walking through and shopping in the stores of the past.
When browsing catalogs, you can also benefit yourself in the following ways:

Dating Items
Being able to see from the pictures in the catalog that your item is available one year and not the next. This can tell you not only what year the item came out, but what year it stopped being sold to the public.

Dating Design Changes
Because the pictures in these catalogs and ads are most times ultra detailed, you are able to see what year minor changes to an item took place. While patent applied for dates are a good source of information for the basic release date, patents are not updated when small changes to the construction are made.

Becoming Aware Of Items
In many cases you will archive items that you find in the catalogs that you never before even knew existed. You can now be on the look out for the item knowing that it truly exists, and now even know what it looks like.

Identification Of Unsigned Or Unmarked Items
As you browse trade catalogs, you will now see all of the items that each company made. Many of the smaller or common items went unmarked. By looking at the different catalogs, you will be able to identify which makers made what items. Many of them have small differences that can be noted for identification.

In this section you will find many different kinds of printed material. We have done our best to sort this material in a manor that would be user friendly to the viewer.

This section has a Catalog Database (now working on sockets, then on to shades, insulators, fans, etc.)

You can track items using key words or company part numbers to see when the item first came out, and then the last catalog it was found in. This can give a good idea of a date range on a vintage item.

You can use wild card searches using the *

Click Here To Enter The Catalog Section - Working on sockets section now - welcome in...


DATING BY PATENTS
The Patent Research Area


This patent section has been made for easy browsing. We have linked each patent to the patent office tiff files, as well as putting the best parts of each patent drawing for identification into a gallery view for you as shown above.

There are some things that you will need to watch for when using patents for dates, but for the most part when it comes to most items, you are safer using this section rather then going by only the dates found on items.

  • There are some cases where old or incorrect dates were used on shells:
    This could cause you to date the item incorrectly with the date on the item when it was in fact a much later patent.

  • Cases of 'patent applied for' taking up to several years to get approved:
    This could cause you to date the item many years newer, when in fact it was sold to the public many years earlier while in the patent applied for stage. Keep in mind that in these cases, it can help date it older if the date is not on the item, but newer if it is.

  • Cases where parts or methods are being used already, but not actually described in an official patent until years later:

An example of this would be where a feature is displayed in a diagram drawn for one patent in 1906. It already may have been a common method used on this types of item, or something used on another item type already for many years. Now lets say in 1910 the method or part is actually described in the writing of the patent. Because it is now being described it has now become part of the patent, which is far different from just being included in a previous drawing. It is sometimes helpful to analyze the patent drawings for what was common in the era or in the artists mind while drawing the pictures.

An example of incorrect dating:

The patent dates seen on some Bryant socket shells are patents for the shells only, not for the switches inside.
These socket shells were used first for their turnkey switches and in later years both the turnkey and pull chain style switches. The first Bryant pull chain switches first started coming out around 1904/1905.
Also these same shell patent dates were used on later examples of shells, such as when the shell was updated and started using UNO threads. So you can have a socket that is marked with a patent date of 1907, but has UNO threads which where not used on sockets until 1914. This was seven years later.

An example of a common mistake, is for someone to read the 1907 patent date on this later shell model and then date their lamp at 1907.

Click Here To Enter The Patent Section - NOW UNDER CONSTRUCTION or here for old Hubbell research


DATING BY CHAIN FINIALS
History Of Use

Silk Tuna Line Ball
1896 (see notes)

1899 to 1901

1899 to 1901

1899 to 1901

1901
Size Compare
1901

1901 to 1904

1904 to- 1909

Post 1909

Post 1909

1911 to 1928

1911 to Post 1930

Post 1911 Post 1930

Post 1903 - 1910

1914 - Post 1921

1914 to 1928

1915 to Post 1952
Other Designs

1917 to Post 1952

1923 to Post 1929

1923 to Post 1958


Post 1926

Some As Early As 1910 - Most Used Until Post 1958
Click Here for L
uminous Finials - WAITING CONSTRUCTION (Please check back)


1896 Silk Tuna line Ball

First used by Hubbell for the first pull socket which was patent number 565541. Bryant sold this Hubbell design from 1897 to 1901. Bryant/Perkins continued using this silk tuna line ball finial on a Perkins switch, until it was finally replaced with the Bryant snaplock ball in 1921.

1899 Hubbell Ornate Acorn
This larger, heavy, solid, ornate Hubbell acorn was short lived. It was the first brass acorn that was used on pull chain switches.

1899 Hubbell Large Ornate Crimp Acorn
This acorn differed slightly from the above and was made as a replacement acorn for the above.

1901 Hubbell Large Flat Tip
This acorn was also a solid heavy acorn. This was the first beta design before using the smaller non-ornate acorn shown below.

1902 Hubbell Flat Tip
It is easy to tell the difference between these and other acorns, because this acorn is heavy and solid while others are hollow and weigh almost nothing. The tip at the bottom is round and does NOT come to a sharp point at the end. This rounded tip is flat at the bottom as if it was hammered and is almost always sharp to the touch around the edges. This tip sticks out almost 1/16th of an inch.

1904 Hubbell Point Tip
These are hollow much lighter finials with a distinct point at the end. These do not have flat tips at the bottom like those before 1904 or the dented tip of those after 1909. The point is sharp and distinct and normally sticks out almost 1/16th of an inch.

1909
Bryant Old Style Ball
This ball finial was used by Bryant starting in 1909. Bryant first started using the point tip acorn on their pull sockets in 1907. Then starting in 1909 switched to this ball finial until changing to the tassel many years later. This ball finial was used on many other sockets starting in the year 1912 and as late as 1952 by GE Co., P&S, Benjamin, Arrow and many others.

1909 Hubbell Punch Tip
These finials are the most common seen today, coming from the more common Hubbell sockets without the chain guide attached to the shell. The acorns are hollow just like those above, but without with a distinct point at the end. These finials have more of a dented or punched out tip. The point is not sharp or distinct at all and normally sticks out just enough to give it the form and appearance of a tip.

1911 Hubbell Crimp Acorn
This acorn was used and sold in Hubbell Catalogs from 1911 until 1928 as a replacement acorn.

1911 King's Pat. Chain Ball
This ball finial has a patent date stamped on the bottom of May 9, 1911 which is patent number 992,001 applied for by George A. King of Scovill Manufacturing Co. on Feb. 7th 1911. It was first made as a new invention of a replacement finial, but within only a couple years was licensed by GE, P&S, Arrow, Benjamin, etc. and found it's way onto many of the major sockets and fixtures of the time.

Shortly after this design a new finial with a hole in the bottom came out so that it could be easily used with a string in place of the beaded chain.

1903
Hubbell Removable
These acorns unscrew. Like many other examples of Hubbell's prototypes, the invention was not patented until the final product was decided on. In this case the other removable acorns shown below.

1914 Hubbell Press-In
This acorn was sold in Hubbell and other catalogs as a replacement acorn until 1921. It is much like the 1911 ball by King in the way that it attaches.

1914 Hubbell Removable (Snaplock)
This chain on this acorn is removed by griping the last ball going into the top of the acorn and pushing down lightly. The slip tube will then slide out of the bottom for easy removal. This acorn is called the "snaplock" in the Hubbell Catalogs. It is also the acorn of choice used for silk line cord.

1915 Bryant Snaplock Ball
There is a Bryant patent for this Pat No. 1,083,821 applied for 10/28/1913 approved 01/06/1914. Another patent by Bryant 1,173,896 was filed 03/09/1914 approved 02/29/1916. Another patent by George A. King of Scovill Manufacturing Co. on 12/22/1923 and approved on 01/13/1925.

By 1918 P&S and Benjamin were also using this finial design, 1921 Levloier, 1928 G.E, and was used as late as 1952 by Arrow.

1913 Bryant
1914 Bryant
1923 Scoville
If the finial does not have the slits on the bottom of the base, it is a 1914 Bryant.
If the finial has the slits, but no push down case for the ball to fit into, it is a 1913 Bryant
If the finial has the slits and the chain ball case, it is the 1923 Scoville.

1917
Snaplock Tassel
This was another Bryant design that was used by them early, but ended up replacing the ball finial as early as 1930 and continued to be used post 1948 at which time they were mostly using the thin cheap snapin tassels. Arrow used this design as late as 1952.

1923
Hubbell Removable Acorn
Hubbell used these removable acorns starting in 1923. This finial was at first only used for hard to get to areas such as a candle socket or cylinder lamp. Many of these hard to get into areas were only a few inches from the hole to the socket. However these became quite common and began to be used on newer sockets as a standard by 1927. Soon after only the tassel version was offered that is shown below.

1923
Hubbell Removable Tassel
Tassels using this method started being offered late in 1923 though they became more common during the indicating pull socket era of 1926 to 1930. This tassel was used and sold as a replacement as late as 1958 as shown in the Hubbell catalogs. To see if you have the slide in clamp model acorn or tassel, you can squeeze the clamp tight around the ball with your fingers and then pull up softly. If it is the this removable model it will slide upward as shown in the pictures.

Post 1926 Hubbell Indicating Chain

Indicating pulls started being used in 1926 and shown in the patent for the Indicating Pull Socket patent no. 1736285. The Indicating Pull Socket was one of Harvey Hubbell's last inventions. He died on December 17, 1927. This patent was approved Nov 19th 1929 after his death. His son Harvey Hubbell III, succeeded him as President of Harvey Hubbell, INC.

The indicating pull worked by crimping a larger brass ball cover, over one of the pull chain balls close up to the switch. The switch was designed to hold back some of the chain in the "off" position and release it in the "on" position. Depending on how close that you put the ball to the switch, it could cause the ball to be appear hidden when the switch was off and visible when turned on.

Even though you may find these indicating chains on non-indicating sockets, the chain (if factory installed) dates your item to post 1926 which is when the pull was invented.

Miscellaneous Tassels
While it would be hard to date every tassel that ever came out, it would be a good practice to just use common sense.
If it is a cheap tassel it is likely a cheap undesirable socket. Most of these do not use screws but rivets in the later years when most companies were more concerned with the cost of making the sockets rather then the quality of the socket.

Luminous Finials
For more information or pictures of luminous finials enter this section.
Luminous finials started being offered about 1914 and were still being sold in catalogs as late as 1937




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