When the light bulb goes on in the inventors brain he should immediately describe in a sewn bound notebook his conception. Next he should have someone who understands what he has done read the description, watch the inventor sign and date the entry then, witness that he read and understood what was logged. These actions attest to the date of invention should another inventor claim he had done this earlier.
Further log entries must show progress toward a reduction to practice. Lack of pursuit of proving the idea often equates to abandoning an idea. The inventor through his attorney files a patent application when a working model has been built. There are so many rules and conventions that at this point it is wise to turn to a patent attorney. He will search existing patents to determine what is really novel. What no one before has claimed. The patent attorney can search all previously issued patents.
Today patents are well codified and fit into categories published by the government. It is only necessary to know the full name of the inventor or the assignee or the patent number or the field of invention.
This really simplifies a searchers review for novelty. Such searchers are often law students or trained independent searchers. Just what is the worth of a patent anyhow? Only time will tell whether it is a big winner a moderate one or is never used.
An issued patent is the exclusive property of an inventor for 17 years. He may use it, license it use by others, sell the rights, assign it to another or not use it at all. In exchange for that exclusivity the government has the right to publish the improvement in technology to encourage others to make further inventions based on this one.
Searching for novelty is expensive. A switch selects the range and indicates the power multiplying factor.
The dial calibration of Models A, B and C covers approximately degrees, with an equivalent scale length of about 60 inches. No zero setting is necessary on these oscillators. Here is a picture of the i tuning dial as shown on page 7 of the catalog with the following comment:.
Each Model i is carefully hand calibrated to insure maximum accuracy. As shown in the block diagram below the signal source is the model B basic circuitry followed by a 5 Watt 2 x 6L6 tubes , push-pull amplifier whose output is applied to the network under test through a dB, 1 dB step attenuator and a line matching transformer. The control part of the AG integrates two vacuum tube voltmeters, one to measure the input and the second to measure the output of the device under test.
This is the first example of an HP product that provides answers to multiple problems found in production testing. Combining different tools in a single unit results in many advantages for instruments of this era where temperature drift and component aging were significant sources of measurement uncertainty.
To tune down to 0. This results in the very particular arrangement which is shown below. Four, 4 x pf air variable capacitors are mounted behind the front panel and are mechanically connected to drive simultaneously with the tuning dial. If you have never seen the inside of a B before, you might be a little disappointed when you open the cabinet for the first time.
It looks like having had some problem during the transportation. But in spite of looks, it works well, the proof below. This strange design layout was imposed by the mechanical size of the variable capacitors which couldn't fit, in line, in the standard cabinet rack size.
No escape to the rule, the first portable battery-operated instrument produced by HP was an Audio Oscillator. Watts November Prototype from External View. Prototype from Internal View.
Bill and Dave started their business together and named it with the toss of a coin. The company's first big sale was an order of eight model B audio oscillators to the Walt Disney Company. Disney engineers used them to test the channels, recording equipment and speaker systems for its new "Fantasound" sound system. The proceeds from those early sales funded more work that improved each successive model. Hewlett and David Packard.
Egon Loebner, former HP Labs counselor for Science and Technology, referred once to Bill's patent as "a sort of techno-economic birth certificate. The patent was the first of 13 granted to Bill over the course of his lifetime. He was inducted into the Inventors Hall of Fame in Patent No. It set in motion a history the HP family is still in the midst of living. The A was produced until About us All of HP U. Company information. About us. HP Timeline. Virtual museum.
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