Vibroplex Bugs

After the Autoplex and Original models, Vibroplex came up with numerous other models through the years, representing various levels of "improvement".Below you will find a list of all the different models, along with pictures of each.

Although it has changed hands several times over the years, Vibroplex is still in business today !

For more information about the different Vibroplex models, including how to estimate the date your key was made from the serial number, check out Randy Cole's excellent website on Vibroplex keys.

(Click on the pictures below to see larger versions of the photo)


The Martin Autoplex (1902-1904)


The Autoplex, as it was manufactured, looks quite different from the original patent drawing, but this is often the case with inventions.

It's a bit of an intimidating instrument, both in appearance and in operation. It makes quite a racket when sending dots and generates visible sparks at the keying contacts.

The first version of the Autoplex, which is quite rare, was built on a wooden base. The later version was all metal, nickel plated brass.


Vibroplex Original (1904-Present)


The first Original Model came in 2 different finishes. The standard finish was a black lacquer with gold pinstripes and "florets" along the edge. This type of finish is known a Japanned finish, as it imitates the finish on early Asian furniture.

The key was also available in nickel plated finish. The Original entered production around 1904 and is still being made today with only minor design changes,most notably the removal of the circuit closer since landline telegraph circuits are no longer in use.


Double Lever (1907-1926)

The Double Lever, as the name suggests, added a second short lever to be used for sending dashes.

This model was first introduced when Martin moved the Vibroplex operation to Norcross Georgia for a few years starting in 1907.

Pictured are the early model with the square frame (ca. 1907) and the later model with the cloverleaf shaped frame (ca. 1920).


Norcross, Georgia Label Keys (1907-1909)


Martin moved the operation from New York to Norcross Georgia for a short time starting in 1907 and sold his Vibroplex keys under the name of United Electric Mfg. Co. It was while in Norcross that he invented the Double-Lever Vibroplex. The earlier Norcross keys were built using a metal base that was much thinner than the orginal design which required the use of a fold-out extension leg to keep the key from moving around on the table.

Because so few of the Norcross bugs were made, they are highly sought after by collectors. Pictured above are a Norcross Original on a standard thick base on the left, a rare half-frame thin base double lever key (2 middle keys), and an unusual nickel plated half-frame double lever on the right. (The vast majority of Norcross keys were not plated).


Model X (1911-1923)


The Model X was an interesting design modification that used an ingenious mechanism to allow both the dots and dashes to use the same set of contacts. Some people feel they are a little clunky to operate but they did the job.

There were 2 versions of this key. The first one had a square weight and pendulum arm, while the second version, which was somewhat more simplified, used round weights and pendulum arm.


Patent 457 Bug (~1912)

Although at first glance it might look like a Model X, this is actually a unique key. Horace Martin patented this key under patent number 1,042,457. If you look closely and compare the two models you can spot the differences, most notably the Patent 457 key uses 2 sets of contacts like the Original.

Supposedly 100 of these keys were made but only 1 example is currently known, making it the rarest Vibroplex model ! (Randy Cole, KN6W Collection)



Model 4 / Blue Racer (1914-1962)



The Model 4, also known as the Blue Racer, was introduced in 1914. Its design and construction is pretty much identical to the Original, except for using smaller components on a narrower 2.5" wide base. (The Original model and many of the other models were built on a 3.5" wide base).

It was called the Blue Racer because one of the available finishes was a cobalt blue lacquer color. The key was also offered in black japanned lacquer with gold pinstripes, nickel plated, and later black or gray crackle paint finishes. During WW2 the key was also offered in Battleship Gray crackle finish.

The Model 4 was also available on a standard 3.5" wide base. An example can be seen above, at the right.


The Upright Model (1917-1919)

The Upright model was also known as The Wirechief's Key. The Wirechief usually had managerial duties to perform as well as acting as a telegrapher, so his desk often had lots of paperwork on it. The Wirechief Key took up less room on the desk. It is estimated there were around 50 of these made, and around 30 are known to exist.



The Midget (1918-1920)


Another of the rarer Vibroplex Models, there are only 9 of these currently known. Due to its small size and light weight, the key required the use of a fold out extension leg to help keep it stable on the operating table. Even with the leg, the key still moved around a lot which is why it was not made for very long.


Model 6 - Lightning Bug (1927-1979)

The Lightning Bug can be recognized by the assembled trianglular plate frame and "goalpost" damper assembly. It was a pretty popular model, judging from the fact that it was made all the way to 1979. During WW2 Vibroplex also made the Lightning Bug for the Army Signal Corps under the designator J-36.

In addition, the Lionel Corporation (yes, the model train company) also made J-36 keys of the same design for the Army.



Colored Vibroplexes

During the Depression era of the early 1930's, Vibroplex offered their keys (Original, Lightning Bug, Blue Racer) in red, blue, and green finish. Here is a picture of some Vibroplex Originals in all 3 colors, plus the Western Union maroon color that was available in the early 1920's.



The Martin Junior (1920-1939)

The Junior model was virtually identical to the Original model except that the base was 1/2" narrower. Another way to distinguish a Junior from an Original is the nameplate is mounted upside down compared to the Original.



Zephyr (1939-1958)

The Zephyr Model closely resembles the Lightning Bug with the assembled triangular plate frame. The differences are the Zephyr has a narrower 3" wide base and uses a simpler damper assembly.



Champion (1939-1980)

The Champion model is identical to the Zephyr except that it lacks a circuit closer, and has the normal 3.5" wide base.



Presentation Model (1948-Present)


Around 1940, Vibroplex started using chrome plating on some of their keys. They then called the chrome plated keys "Deluxe" models, and were available with the Original, Lightning Bug, and Blue Racer.

The Presentation Model was also known as the Super-Deluxe. It was basically the same as a Deluxe model with the addition of a gold plated brass plate on top of the base. The earlier version of the key also had a mainspring that could be adjusted in length to allow the operator to change the dot speed. Here are pictures of the Deluxe and Super-Deluxe, or Presentation.