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Friday, July 28, 2023

The Brownie camera

© Mark Ollig

Joseph Nicéphore Niépce was a French inventor who took the world’s first photograph.

Nearly 200 years ago, he set up his wooden box camera on a pedestal in front of the window in an upstairs room of his family’s home at the Le Gras estate in Saint-Loup-de-Varennes, France.

He opened the window and adjusted the camera’s lens to capture the outdoor scenery surrounding the estate on what I assume was a sunny day.

After about eight hours, Niépce opened the camera and removed a metal plate coated with a light-sensitive material called bitumen of Judea.

He rinsed the metal plate with different solvents, causing the unexposed areas of the metal surface to dissolve, leaving a permanent image of the buildings and the surrounding countryside on the metal plate.

This was the world’s first photograph.

The year Niépce captured this image is disputed – some say 1826, others say 1827.

On July 5, 1833, in Saint-Loup-de-Varennes, France, Joseph Nicéphore Niépce died at 68.

Joseph Nicéphore Niépce significantly impacted photography by inventing heliography, a process that produces long-lasting photographic images.

“The Niépce Heliograph,” aka “View from the Window at Le Gras,” is displayed at the Harry Ransom Center in Austin, TX.

The eight-inch by six-and-half-inch metal plate image is securely protected inside an airtight steel and plexiglass display case filled with inert gas.

Visit https://tinyurl.com/TheFirstPhoto to see the world’s first photograph.

During the late 1800s, photography could be challenging and time-consuming due to the need for large and heavy glass plates to be hand-loaded into cameras.

In 1888, American George Eastman introduced the first Kodak box camera, serial number 540, made of wood, metal, and leather.

Its groundbreaking film-loading system used a 100-exposure roll of flexible nitrocellulose film, making bulky glass-plate negatives unnecessary.

However, the entire camera had to be sent back to Kodak for the film to be developed and prints to be made.

Kodak would then reload the camera with film and return it to the user.

The Kodak Model 540 camera sold for $25, equivalent to $802 today, and was primarily purchased by affluent individuals interested in photography.

Frank A. Brownell was born in Vienna, Ontario, Canada, Feb. 4, 1859.

On Dec. 9, 1890, Brownell obtained US Patent No. 442,216, titled “Photographic Camera,” and established the Brownell Manufacturing Company, where he used his expertise in wood and metalworking assembling cameras.

George Eastman hired Brownell to assist with assembling Kodak’s wooden box camera and roll film holder.

Their partnership grew, and the Brownell Manufacturing Company became the sole producer of Kodak cameras from 1888 to 1902.

Brownell developed and manufactured the first Brownie camera, subsequently sold by the Eastman Kodak Company in 1900.

The first Brownie cardboard box camera, which only cost $1 ($36 today), was affordable for most people and made it easy to take up to six 2.25-inch square snapshots using black and white 117 film.

The camera used a meniscus (convex-concave) lens to focus light from the picture subjects onto the film, which could be removed and developed at home.

The Brownie camera was named after the popular children’s book characters “The Brownies” by Palmer Cox, and partly because it was originally manufactured by Frank A. Brownell.

In 1901, Kodak released an upgraded version of the Brownie camera called the Brownie No. 2. It cost $2 and used 120 film to produce photos that were 3.25 inches by 2.25 inches in size.

A year later, Eastman Kodak Company bought out Brownell but retained him as their “camera design expert.”

It is estimated that over two million Brownie No. 2 cameras were sold between 1901 and 1915.

By 1927, the photography industry in the US was, for the most part, dominated by the Eastman Kodak Company.

In 1931, Kodak launched the 620 film format, similar to 120 film but lighter weight and with a slimmer spool.

Each roll of 620 film took eight, 12, or 16 pictures, depending on the camera model.

The 1932 Kodak Six-20 self-folding camera, using the 620 film format, was introduced in 1932 for $38 ($810 today).

Other cameras from that era also used Kodak 620 film.

In 1946, Eastman Kodak introduced the affordable $3.50 ($58 today) Brownie Target Six-20 Art Deco-styled box-type camera model that took eight pictures on a single roll of 62mm length 620 film.

The Brownie Target Six-20 camera’s distinct Art Deco vertical design on its front plate was reminiscent of the era’s architectural skyscrapers.

The camera measures four inches in height, three inches in width, and five inches in depth. It weighs approximately one pound.

It has a portrait viewfinder at the top, and a landscape viewer on the right.

To prevent blurry photos caused by “camera shake,” keeping the camera steady while taking pictures was needed due to the slow shutter speed of 1/50th of a second.

Although the Kodak Brownie Target Six-20 Art Deco model was discontinued in 1952, it remains a popular camera for collectors and vintage photography enthusiasts.

Frank Alexander Brownell, the inventor of the original Brownie camera, died in Rochester, NY, Feb. 2, 1939, just two days before his 80th birthday.

Below are photos of my Brownie Target Six-20 camera.




Friday, July 21, 2023

Baudot: a digital code pioneer

© Mark Ollig


AT&T introduced the Bell 103 dataset modem in 1962.

The Bell 103 operated at 300 baud with full-duplex data transmission speeds up to 300 bits per second (bps) over standard analog telephone lines.

The Bell 212A, a 1,200-baud analog modem that could transmit data at 1,200 bps, was introduced by AT&T in 1976.

These early modems transmitted one bit per baud, so a 300-baud modem would transmit at 300 bps and a 1,200 baud at 1,200 bps.

A modem (modulator/demodulator) is a peripheral hardware device that converts digital signals to analog for transmission over a standard telephone line and then back to digital at the receiving end.

Baud rate measures the number of times a signal changes state per second in determining the data/signal transmission rate. A signal can be a voltage, frequency, or waveform phase change.

The term “baud” originated from Jean-Maurice-Émile Baudot, a French telegraph engineer who invented the Baudot code in 1870.

The Baudot code is a five-bit binary character code used in the telegraph system. A five-bit combination of current-on or current-off signals of equal duration represents each alphabet letter.

The code represented a major improvement from the earlier Morse code, which relies on dots and dashes.

The Baudot code paved the way for digital coding systems in today’s communication channels.

The baud rate can differ from the bit rate, which is the number of bits transmitted per second.

If a modem packs multiple bits into each signal change, the bit rate can be higher than the baud rate.

For example, a modem packing eight bits into each baud can transmit at a bit rate of 9,600 bps, even though the baud rate is only 1,200 baud because 9,600 bps equals 1,200 baud multiplied by eight bits per baud.

But I digress.

In 1977, Dale Heatherington and Dennis Hayes designed and assembled the first 1,200-baud modem circuit board for personal computers.

The two formed DC Hayes Associates, renamed Hayes Microcomputer Products in 1980.

Computer users began installing Hayes modems to access dial-up computing services.

On Oct. 16, 1983, the Davenport Iowa Quad-City Times newspaper advertised a Hayes 1,200 Baud Modem for $595.

The hobbyist dial-up computer Bulletin Board System (BBS) I operated, “WBBS OnLine!,” could be accessed through four telephone lines connected to Hayes modems.

During the 1980s, computer users with a 1,200 baud modem logged onto dial-up commercial BBS platforms like CompuServe, Prodigy, GEnie, AOL, and BIX.

There used to be tens of thousands of non-profit hobbyist dial-up BBS platforms nationwide, accessible using 1-800 and local telephone numbers, like WBBS OnLine!

In the early 1980s, I used a Panasonic KX-D4920 portable data terminal with a built-in modem while working at the Winsted Telephone Company.

The words “1,200 BAUD HIGH SPEED” were written in bold blue font on the face of the data terminal.

As far as I was concerned, a 1,200-baud modem was state-of-the-art.

I used the KX-D4920 connected to modems over dedicated phone lines to program data for the Winsted Telephone Company Nortel DMS-10 digital telephone switching platform and other companies’ private branch exchange digital telephone systems.

The 1,200 baud data terminal operated in an asynchronous, full-duplex mode, whereby data can be transmitted and received in both directions simultaneously over a communications channel.

The KX-D4920 data terminal included a full QWERTY keyboard and acoustic couplers, which were “muffs” that held in place a telephone handset. The handset was connected to the data terminal to send and receive audible computer data through the standard analog telephone line.

The two-line LCD screen displays 80 characters of typed data and allows editing before pressing the enter key and sending my program data to the digital switching platform I was logged into.

The KX-D4920 could also communicate with business or home computers via modem access.

A popular data terminal, the KX-D4920, was widely used by computer and telephone technicians alike.

Although 1,200 baud modems are now obsolete, they were a technological advancement and a stepping stone to today’s broadband “high-speed” data transmission rates.

After 40 years, the 17-pound KX-D4920 model terminal I once regularly used has become another part of telecom history.

Since we are taking a trip down memory lane, I got the old data terminal out of mothballs, cleaned it up, put a fresh roll of thermal paper in the holder, plugged it into an AC outlet, and turned the power on.

All the lights on the data terminal lit up. I typed a sentence on the keyboard that appeared on the LCD screen.

Taking a breath, I pressed the enter key.

The familiar sound was heard of the paper roller bar moving and the nine-dot printhead motor whirring as it applied pressure and heat to the surface of the thermal paper, displaying the words I typed.

The KX-D4920 internal 1,200 baud modem would have probably worked, but no operating platforms are available to test it.

I uploaded this brief video at: https://tinyurl.com/BBD4920.

Jean-Maurice-Émile Baudot died March 28, 1903, at 57, in Sceaux, France.








Friday, July 14, 2023

The vintage Eastman Kodatoy movie projector

© Mark Ollig


In 1888, George Eastman coined the name “Kodak” and established the Eastman Kodak Company in Rochester, NY.

On June 5, 1928, Eastman Kodak Company obtained US Patent 1,672,845 titled “Motion-Picture Projector.”

Shortly after, the company began manufacturing the affordable Kodatoy 16 mm silent movie projector, originally marketed to younger folks.

On Oct. 30, 1930, the Buffalo Evening News newspaper in New York advertised the Eastman Kodatoy 16 mm film movie projector.

“Presenting the new Eastman Kodatoy, a real moving picture projector for only $11.95,” read the J.N. Adam & Co. store ad on page six.

When adjusted for inflation, $11.95 in 1930 equals $217 today.

“The complete projection unit includes the Kodatoy with two 100-foot metal spools and one [cardboard] Kodaplay Theater with ‘silvered’ screen surface,” the advertisement said.

The cost of a Kodaplay 16 mm film, advertised as “Little movies carefully selected for juvenile audiences,” ranged from 30 to 90 cents.

“You’ll find Felix the Cat, Charlie Chaplin . . . thrilling air pictures . . . actual battle pictures of the World War [WWI] . . . interesting scenes in strange lands,” the Kodatoy documentation says.

With a maroon-colored metallic body of aluminum and steel, the 10-pound Kodatoy film projector used a burnished metal reflector to increase the light intensity from the lamp towards the moving film, ensuring the images were projected clearly and evenly on the Kodaplay Theater screen.

The projector used a “No. 110 double filament 21 CP Auto Headlight Lamp.”

Candlepower, or CP, is a unit used to measure luminous intensity. A lamp with a 21 CP rating emits light equivalent to 21 candles in a particular direction.

But I digress.

A 16 mm film is threaded through the projector and onto a take-up spool with the emulsion side facing inward so the image is projected on the screen correctly when the film is played.

“Connect the plug at the end of the cord attached to the Kodatoy to an electrical socket that uses 105 to 125 volts and 60 cycle AC only,” said the instructions for turning the projector lamp on.

If all goes well, the lamp lights once the cord is plugged in.

The Eastman Kodatoy projector operates using a single-claw intermittent mechanism that moves the film forward. This process engages one side of the film and two sprocket rollers.

The projector has a three-bladed shutter and a heat filter that operates with centrifugal force. This filter effectively shields the lamp from dust and other particles. Also, the projector’s top cover is vented to release the heat produced by the lamp.

When using the 16 mm projector, the film runs at a speed of 24 frames per second, meaning each frame is shown for 1/24 of a second.

The hand crank must be turned at two revolutions per second to maintain the correct speed to ensure each frame is projected for the appropriate duration.

According to Kodatoy’s documentation, it is recommended to position the decorative cardboard screen of the Kodaplay Theatre five feet away from the Kodatoy projector lens.

The Kodatoy lamp projects the moving film images onto the screen. One obtains improved visual clarity by adjusting the lens position forward or backward.

After the movie was finished and the film needed to be rewound, the hand crank used to advance the film was removed and attached to the shaft of the upper hand rewind spindle of the projector.

The Kodatoy does not have an audio speaker; however, it creates a soothing mechanical “clickity-clickity-clickity” whirling sound as the film advances through the projector, and the small cogs or sprockets engage with holes in the side of the film as the reel turns.

To many, this sound adds to the enjoyment of watching an old silent movie.

In 1931, a 115v 60Hz AC motor allowing for automatic film advancement could be attached to the projector instead of using the hand crank.

The following year, the Eastman Kodatoy projector could be purchased with a built-in motor for $18.50 ($423 today). An optional 400-foot spool extension arm attachment also became available.

On May 4, 1933, the Kodatoy projector was advertised on page 10 of the Minneapolis Tribune newspaper, saying, “Projects any 16 mm movie film – including the hundred-foot Cinegraphs that we sell or rent.”

The ad was from the Eastman Kodak Store at 114 South Fifth Street in Minneapolis.

Eastman Kodak ended production of their Kodatoy projector in 1939, partly due to the effects of the Great Depression and the arrival of home movie projectors such as the Kodak Ciné-Kodak and the Bell & Howell Eyemo.

I am fortunate to own a 1932 Eastman Kodak Kodatoy 16 mm film projector (hand crank) with its original cardboard cover, user manual, and a few 16 mm movie reels.

If you’re feeling nostalgic and want to listen to the sounds of film running through an old-fashioned movie projector, you’re in luck.

Eight continuous hours (yes, eight) are available from the @MonotonyTV YouTube channel at https://tinyurl.com/BBprojector.

















Friday, July 7, 2023

The tube of AI toothpaste

© Mark Ollig

Decision-Making Neural Networks (DMNs) are artificial intelligence (AI) models using multiple learning methods to make decisions in solving complex problems.

AI models make decisions by processing different data types, including text, audio, images, video, sensor data, and code.

They also identify patterns in historical information and associations between different pieces of information and previously arrived at decisions.

AI models then apply this knowledge to quickly analyze and process large amounts of new information.

DMN AI models have been applied to the health industry for making decisions about patient care, logistics for managing shipping routes, various financial investment decisions, and for use with multiple applications on the Internet.

An AI inference model is a computer program trained on large datasets of labeled data, allowing them to make predictions on information they have not previously encountered.

These models learn from labeled datasets, such as photos of cats labeled as “cat” and dogs labeled as “dog,” to generalize and recognize similar images in the future.

This AI stuff sounds easy-peasy.

AI inference models learn to identify patterns in data and make projections on new data they have not seen before.

Certain AI models utilize rule-based logic that involves “if-then” statements to arrive at decisions. For instance, a rule-based AI system could have a rule that states: “If the temperature exceeds 90 degrees Fahrenheit, switch on the air conditioner.”

Machine learning algorithms allow AI models to learn from data and make decisions without requiring extensive programming.

An algorithm based on machine learning models can be trained using past weather data to forecast temperature for a specific day.

Machine learning algorithms are generally more powerful than rule-based logic, so most AI models rely on them to make decisions.

AI models assist in decision-making for self-driving cars, medical diagnoses, security, fraud detection, product recommendations, and more.

ChatGPT AI can assist with a vast range of topics. Its language model is designed to provide responses that resemble human-generated ones. It’s worth noting its data and code are current up until 2021.


In February, Microsoft launched Bing Chat, using OpenAI’s Generative Pre-trained Transformer 4 (GPT-4), a large language model that supports multiple modes of communication.

GPT-4 is integrated with Microsoft’s Bing search engine, helping users to obtain current information from verified web pages.

OpenAI, founded in 2015, focuses on developing safe and beneficial AGI with a mission statement to “ensure that artificial general intelligence [AGI] benefits all of humanity.”

At present, AGI remains a theoretical form of artificial intelligence that may one day possess the ability to comprehend and rationalize like a human.

OpenAI developed the DALL-E 2 Generative AI-powered model that creates images based on text descriptions.

If given the instruction “a cat wearing a hat sitting on a skateboard,” DALL-E 2 can generate an image visually similar to what a human artist would create.

ChatGPT is a popular AI processing network that is still in development. It uses OpenAI’s advanced language model, GPT-4, to generate human-like written content through visual and textual input.

Bing AI chat uses the power of ChatGPT and GPT-4 in partnership with OpenAI and enhances it with real-time information and sources. It interacts with human users and provides additional example questions to initial requests.

Accessing Bing Chat from the Microsoft Edge web browser is recommended. I created this shortened link: https://tinyurl.com/BB-BingAI.

Google Bard is a large language model (LLM) generative AI chatbot developed by Google AI.

It is acknowledged that generative AI can produce content, images, audio, videos, and text almost identical to what humans create.

Google Bard is a tool that uses a large amount of text and code to create responses to various prompts and questions resembling human-like interactions.

It can assist with generating text, language translation, creating diverse types of content, coding in programming languages like Python, Java, and C++, and “answering your questions about the real world.”

Although still under development, the Google Bard AI chatbot can be accessed at https://bard.google.com.

Chatbots powered by AI can comprehend natural human language and deliver personalized replies.

When communicating with AI chatbots, it is important to use clear language that is easy for the chatbot to understand, use simple sentences, avoid jargon, and be specific.

When communicating with those AI chatbots, including appropriate keywords in your sentences is important.

Avoiding offensive or vulgar language is also good, as it sometimes restricts a chatbot’s ability to interact with you.

Learn how to create a personalized chatbot from the YouTube video “ChatGPT in Python for Beginners – Build A Chatbot” at https://tinyurl.com/ymcb3v5a.

Having a personal chatbot reminds me of owning a pet rock in the ’70s.

You do remember those pet rocks, right?

As AI continues its unstoppable advancements, we are witnessing its ongoing integration with our existing technology and us.

Is AI an “it” or a “they?”

Some contend it should be called “it” since it is a machine lacking human qualities.

Meanwhile, others suggest using “they” because AI is becoming more advanced and may eventually achieve consciousness.

Will it be AI that assimilates us, and not “The Borg?”

Folks, we won’t be putting the AI toothpaste back in the tube.