Technology from the good old days
PATENTS
DOCUMENTS and PAPERS
First a rant about copyrights and legal issues. Some of the documents were published in technical journals and one in a published book. Each has different policies as to publishing on an open page on the web. I have copies of most, or very similar company publications.
The Society of Photographic Instrumentation Engineers, now just SPIE, has a reasonable policy that allows an author to publish his work as long as it has a citation listing the copyright restrictions.
Books by Marcel Dekker are now published by CRC Press, part of the Taylor and Francis publishing group. Their copyrights are managed by the Copyright Clearance Center (CCC). The fee (March 2015) to publish on the web in a page with restricted viewing is 20 to 25 cents per page per viewer. Chapter 4 would then cost me $50.00 for 10 people and one month. However, for unlimited public viewing, the fee is $503, renewable each year. If you want to read the book, come by for coffee and I will let you read it., or see Amazon.
The Institute of Electronic and Electrical Engineers (IEEE) also uses the CCC. They will let be publish the correspondence on Q measurement, 2 pages, for one year on this non-commercial site for $450, but as a member I can get you a copy for $13.
Alvarez, R., and J. P. Lindley, "Q measurement of strongly coupled cavities"
Arnold, C. A., and J. P. Lindley, "Product design of 200 kilowatt tunable X-band klystron"
Cohoon, Rl L., C. B. Crumly, L. C. Foster, and J. P. Lindley, "Mode locking the He-Ne laser by external injective feedback"
Hecht, D. L., J. P. Lindley, H. L. Nurse and J. Rieden, "Wide band Acousto-Optic Recording and Analysis Systems"
Lindley, J. P., F. Schumacher, R. Falconer, J. Krenz, "Construction and performance of metal ceramic tubes for C- and X-bands"
Lindley, J. P., and H. L. Nurse, "Spectrum Analysis Using Acousto-Optic Techniques"
John P. Lindley and Howard L. Nurse, "Spectrum Analysis Using Acousto-Optic Techniques"
Lindley, J. P., "Application of Acousto-Optic Techniques to RF Spectrum Analysis"
Nurse. H. L., J. P. Lindley, and R. Roderique, "An Optically Processed PRI vs Frequency Display"
Robert C. McCarty and John P. Lindley, "Fractal dimension and nonlinear dynamical processes"
First a rant about copyrights and legal issues. Some of the documents were published in technical journals and one in a published book. Each has different policies as to publishing on an open page on the web. I have copies of most, or very similar company publications.
The Society of Photographic Instrumentation Engineers, now just SPIE, has a reasonable policy that allows an author to publish his work as long as it has a citation listing the copyright restrictions.
Books by Marcel Dekker are now published by CRC Press, part of the Taylor and Francis publishing group. Their copyrights are managed by the Copyright Clearance Center (CCC). The fee (March 2015) to publish on the web in a page with restricted viewing is 20 to 25 cents per page per viewer. Chapter 4 would then cost me $50.00 for 10 people and one month. However, for unlimited public viewing, the fee is $503, renewable each year. If you want to read the book, come by for coffee and I will let you read it., or see Amazon.
The Institute of Electronic and Electrical Engineers (IEEE) also uses the CCC. They will let be publish the correspondence on Q measurement, 2 pages, for one year on this non-commercial site for $450, but as a member I can get you a copy for $13.
Alvarez, R., and J. P. Lindley, "Q measurement of strongly coupled cavities"
Arnold, C. A., and J. P. Lindley, "Product design of 200 kilowatt tunable X-band klystron"
Cohoon, Rl L., C. B. Crumly, L. C. Foster, and J. P. Lindley, "Mode locking the He-Ne laser by external injective feedback"
Hecht, D. L., J. P. Lindley, H. L. Nurse and J. Rieden, "Wide band Acousto-Optic Recording and Analysis Systems"
Lindley, J. P., F. Schumacher, R. Falconer, J. Krenz, "Construction and performance of metal ceramic tubes for C- and X-bands"
Lindley, J. P., and H. L. Nurse, "Spectrum Analysis Using Acousto-Optic Techniques"
John P. Lindley and Howard L. Nurse, "Spectrum Analysis Using Acousto-Optic Techniques"
Lindley, J. P., "Application of Acousto-Optic Techniques to RF Spectrum Analysis"
Nurse. H. L., J. P. Lindley, and R. Roderique, "An Optically Processed PRI vs Frequency Display"
Robert C. McCarty and John P. Lindley, "Fractal dimension and nonlinear dynamical processes"
TUBES
Arnold, C. A., and J. P. Lindley, "Product design of 200 kilowatt tunable X-band klystron". a paper presented at Electron Devices Meeting October 1975.
This klystron was being developed in 1957 and 1958, and featured a single knob tuning. Typical operation was 250 kw peak power at 53,000 volts and 250 to 500 watts average power.
This klystron was being developed in 1957 and 1958, and featured a single knob tuning. Typical operation was 250 kw peak power at 53,000 volts and 250 to 500 watts average power.
I remember spending hours assembling the body with brazing wire in the joints and stainless wire to hold it together. It would then be put into a furnace to melt the brazing material. I designed the output wave guide shown in the third picture. It replaced one that had been designed at Stanford. The new design was shorter, lighter and, I think, had a little better performance. We put in a patent application. After I left the project, I heard that the design was arcing due to the high voltage at peak power and damaging the tube. So they went back to the Stanford design, and thus no patent.
Lindley, J. P., F. Schumacher, R. Falconer, J. Krenz, "Construction and performance of metal ceramic tubes for C- and X-bands", a paper presented at Electron Devices Meeting October 1958.
The second photo shows an aluminum box that contained the tube and permanent magnet. I designed the package and several were built by the machinists at the GE Lab. When every thing seemed OK we bought a number (probably 10 or 20) boxes from an outside machine shop. They would not fit together! I found out that I had made an error in the drawings for the box, and the GE machinist had corrected everything so they fit without mentioning it. He said he knew I meant to do it..
Inside the box was a permanent magnet based on a design by Myron Glass at Bell Labs. It had a unique shape that produced a very uniform magnet field to focus the traveling wave tube. We had to put some notches in the side of the magnet to insert the waveguide couplers. Many years later I went into the machine shop at Zenith and one of the magnets, with a notch, was on the side of a tool box. I asked where it had come from. The answer was that the person that had collected our metal scrap had left it because "It wasn't worth anything." I guess there is lesson here somwhere.
Fred Schumacher designed the rf parameters of these tubes. Later, he and Stan Kaisel of Stanford University formed their own company Microwave Electronics Corp. (MEC) which was later sold to Teledyne. They were very successful and MEC is still building TWTs.
Inside the box was a permanent magnet based on a design by Myron Glass at Bell Labs. It had a unique shape that produced a very uniform magnet field to focus the traveling wave tube. We had to put some notches in the side of the magnet to insert the waveguide couplers. Many years later I went into the machine shop at Zenith and one of the magnets, with a notch, was on the side of a tool box. I asked where it had come from. The answer was that the person that had collected our metal scrap had left it because "It wasn't worth anything." I guess there is lesson here somwhere.
Fred Schumacher designed the rf parameters of these tubes. Later, he and Stan Kaisel of Stanford University formed their own company Microwave Electronics Corp. (MEC) which was later sold to Teledyne. They were very successful and MEC is still building TWTs.
Alvarez, R., and J. P. Lindley, " Q measurement of strongly coupled cavities". IEEE Transactions on Microwave Theory and Techniques, Vol. MTT-1, No. 1, January 1963.
I bought a copy from the IEEE. Click the title for an abstract.
Zenith had a contract to develop a C band Electron Beam Parametric Amplifier (EBPA). The lower frequency tubes were tuned with capacitors and inductors. At C band the circuits were cavities. I do not remember the exact frequency, it would have been about 4 GHz, and the parametric pump frequency 8 GHz. The test set up would have looked like the GE lab picture above.
I bought a copy from the IEEE. Click the title for an abstract.
Zenith had a contract to develop a C band Electron Beam Parametric Amplifier (EBPA). The lower frequency tubes were tuned with capacitors and inductors. At C band the circuits were cavities. I do not remember the exact frequency, it would have been about 4 GHz, and the parametric pump frequency 8 GHz. The test set up would have looked like the GE lab picture above.
LASERS
Cohoon, Rl L., C. B. Crumly, L. C. Foster, and J. P. Lindley, "Mode locking the He-Ne laser by external injective feedback", a paper presented at the 1967 Conference on Electron Device Research, Montreal, Canada, June 21, 1967.
No copy of this one either, but easy to describe.
No copy of this one either, but easy to describe.
Hecht, D. L., J. P. Lindley, H. L. Nurse and J. Rieden, "Wide band Acousto-Optic Recording and Analysis Systems", 1977, Electro-Optic Systems Design Conference - unpublished.
Similar to the SPIE 1977 paper
Howard Nurse was an excellent engineer at Applied Technology. We were just starting to build computer controlled systems and were applying computers to control and processing of the A-O Spectrum analysers using the Motorola 6502 chip.
Howard was the author of Roots, I believe it was the first computer based genealogy program. He is still active developing digital tools for Amateur Radio at his company, CommCat/COMMSOFT The About page mentions several other Applied Technology engineers that helped him. An article in Makezine Magaxine gives more information about Howard's connections with Heathkit.
There are several ties between Zenith Radio Corporation, Heathkit, and me.
Of course, during my ham career I built many kits, and still have most of the completed units. In 1954, when I first reported for work at the GE Electronics Laboratory in Syracuse, NY, I was surprised to find lots of Heahtkit oscilloscopes, voltmeters, signal generators and other Heathkit equipment, in use with the Hewlet-Packard and General Radio units. That year there had been a long, company wide strike and everyone was locked out of the plant. GE had taken over a down town Syracuse hotel for the engineering staff, and the first thing they did was buy Heathkits and build the test equipment they need to continue work.
Recently in our local Analog Archives and Museum (garage), I found this letter dated 1970 suggesting that Zenith enter the computer business. (I am surprised that the HomeBrew Computer Club did not start until 1975. So this idea must of resulted from the Tymeshare Teletype we had at Zenth. Tymeshare was founded in 1964. Lois worked there, and her pension now comes from Verizon?)
Then in 1972 Applied Technology purchased Zenith Radio Research Laboratory from Zenith Radio Corporation.
About 1974, Howard Nurse came to work for Applied Technology. His father was president of Heathkit.
In1977 we wrote these papers. Also 1977, it is reported that Heathkit entered the personal computer business.
In 1979, Zenith Radio Corporation purchased Heathkit and formed Zenith Data Systems (ZDS).
Similar to the SPIE 1977 paper
Howard Nurse was an excellent engineer at Applied Technology. We were just starting to build computer controlled systems and were applying computers to control and processing of the A-O Spectrum analysers using the Motorola 6502 chip.
Howard was the author of Roots, I believe it was the first computer based genealogy program. He is still active developing digital tools for Amateur Radio at his company, CommCat/COMMSOFT The About page mentions several other Applied Technology engineers that helped him. An article in Makezine Magaxine gives more information about Howard's connections with Heathkit.
There are several ties between Zenith Radio Corporation, Heathkit, and me.
Of course, during my ham career I built many kits, and still have most of the completed units. In 1954, when I first reported for work at the GE Electronics Laboratory in Syracuse, NY, I was surprised to find lots of Heahtkit oscilloscopes, voltmeters, signal generators and other Heathkit equipment, in use with the Hewlet-Packard and General Radio units. That year there had been a long, company wide strike and everyone was locked out of the plant. GE had taken over a down town Syracuse hotel for the engineering staff, and the first thing they did was buy Heathkits and build the test equipment they need to continue work.
Recently in our local Analog Archives and Museum (garage), I found this letter dated 1970 suggesting that Zenith enter the computer business. (I am surprised that the HomeBrew Computer Club did not start until 1975. So this idea must of resulted from the Tymeshare Teletype we had at Zenth. Tymeshare was founded in 1964. Lois worked there, and her pension now comes from Verizon?)
Then in 1972 Applied Technology purchased Zenith Radio Research Laboratory from Zenith Radio Corporation.
About 1974, Howard Nurse came to work for Applied Technology. His father was president of Heathkit.
In1977 we wrote these papers. Also 1977, it is reported that Heathkit entered the personal computer business.
In 1979, Zenith Radio Corporation purchased Heathkit and formed Zenith Data Systems (ZDS).
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Lindley, J. P., and H. L. Nurse, "Spectrum Analysis Using Acousto-Optic Techniques", presented at SPIE E-O Symposium, Huntsville, Alabama, November 1977.
Later published in the Symposium Proceedings, a copy below. |
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John P. Lindley and Howard L. Nurse, "Spectrum Analysis Using Acousto-Optic Techniques", Proc. SPIE 0128, Effective Utilization of Optics in Radar Systems, 118 (December 28, 1977); doi:10.1117/12.955976; http://dx.doi.org/10.1117/12.955976
Copyright 1977 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. |
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Lindley, J. P., "Application of Acousto-Optic Techniques to RF Spectrum Analysis". pp 87-106. "Acousto-Optic Signal Processing", editors N. J. Berg and J. N. Lee, publisher Marcell Dekker, 1983.
Get the entire book now for $2.99. The 2nd edition is over $200, not sure if my Chapter 4 is still included. |
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Nurse. H. L., J. P. Lindley, and R. Roderique, "An Optically Processed PRI vs Frequency Display, Presented at the SAC Electro-Optical Symposium, 25-28 April 1977 at Offutt AFB, Nebraska
An early application of channelized digital signal processing.
An early application of channelized digital signal processing.
MATHEMATICS
Robert C. McCarty and John P. Lindley, "Fractal dimension and nonlinear dynamical processes", Proc. SPIE 2038, Chaos in Communications, 342 (November 18, 1993); doi:10.1117/12.162690; http://dx.doi.org/10.1117/12.162690
Copyright 1993 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Do not ask me to explain the mathematics.
Dr. Bob McCartyhad capabilities far beyond his mathematics skill. He was a merchant seaman and radio operator in the WWII invasion of Normandy. He and his wife Rita grew cherries and walnuts near Gilroy. They owned and operated a fruit harvesting business in which one would drive a tree shaker to loosen the fruit. The other operated a net that would catch the fruit and collect it for shipment. Bob had a Class A Truck License and drove semis through out the western states. He was a pilot and they owned a Cessna 210 (I believe).
He got his doctorate in mathematics late in life. I think when he was about 55. He was well respected in the Stanford Mathematics Department. Argo Systems had a joint program with Stanford, and I sat in on some of the meetings. Heady stuff for a mere engineer.
We twice travelled to Ireland, England and Germany with Rita and him. A great person and full of stories.
Copyright 1993 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Do not ask me to explain the mathematics.
Dr. Bob McCartyhad capabilities far beyond his mathematics skill. He was a merchant seaman and radio operator in the WWII invasion of Normandy. He and his wife Rita grew cherries and walnuts near Gilroy. They owned and operated a fruit harvesting business in which one would drive a tree shaker to loosen the fruit. The other operated a net that would catch the fruit and collect it for shipment. Bob had a Class A Truck License and drove semis through out the western states. He was a pilot and they owned a Cessna 210 (I believe).
He got his doctorate in mathematics late in life. I think when he was about 55. He was well respected in the Stanford Mathematics Department. Argo Systems had a joint program with Stanford, and I sat in on some of the meetings. Heady stuff for a mere engineer.
We twice travelled to Ireland, England and Germany with Rita and him. A great person and full of stories.