Comments for Harold "Doc" Edgerton http://edgerton-digital-collections.org Visionary Engineer Tue, 15 May 2012 21:44:51 +0000 hourly 1 http://wordpress.org/?v= Comment on Edgerton Lab Notebook 11, Page 51 by Claire Calcagno http://edgerton-digital-collections.org/notebooks/nb11_106/comment-page-1#comment-1254 Claire Calcagno Tue, 15 May 2012 21:44:51 +0000 http://edgerton-digital-collections.org/notebooks/nb11_106#comment-1254 p. 51 Joe Louis [b/w photograph of Joe Louis [left] and [?] in boxing match] Prize winning photo by Joe Costa New York Daily News [b/w photograph of ice skater] Bottom! p. 51
Joe Louis
[b/w photograph of Joe Louis [left] and [?] in boxing match]
Prize winning photo by Joe Costa New York Daily News

[b/w photograph of ice skater]
Bottom!

]]> Comment on Edgerton Lab Notebook 36, Page 60 by Claire Calcagno http://edgerton-digital-collections.org/notebooks/nb36_126/comment-page-1#comment-1249 Claire Calcagno Tue, 15 May 2012 21:39:28 +0000 http://edgerton-digital-collections.org/notebooks/nb36_126#comment-1249 June 22, 1987 D. Edgerton Larry [?] and Colin Gibson were married several days ago in Westport. Esther and I went with Joan. Joe Klimcak called from N.J. He is experimenting with boomers. He wants to find some lead bars lost long ago. He told me of the REPUBLIC which was lost south of Marthas Vineyard with a cargo of gold coins . 260feet deep.? June 24 1987. Man [?] experiment Don Massa Experiment for June 25. Tape from Massa with signals from whales. 3.3 KH signal. 25 ms 100 ms [?] signal. Messy [?] pulses back. Lots of activity. many tape recordings photographs of [--?--] Massa J-9 U.S. Navy. Broadband. (U.S. Navy). Experiment send sound from [?] Humpbacks (Hgs- 15) Hydrophone. (TR25 TR16) Record sounds in water. Greg [?] Early - Pilot whales - 3 young. M1002 August [--?--] 6 - School [--?--] Porthole [--?--] Lichtfield Communication Camp Box 162 Adelphia N.J. 01710 William S. Coury Consultant. Lonboat Key Florida 33548 813 383 6689 Susan Lewis - Tech Review - Bullet Photos -- Massa June 22, 1987
D. Edgerton

Larry [?] and Colin Gibson were married several days ago in Westport. Esther and I went with Joan.

Joe Klimcak called from N.J. He is experimenting with boomers. He wants to find some lead bars lost long ago.

He told me of the REPUBLIC which was lost south of Marthas Vineyard with a cargo of gold coins . 260feet deep.?

June 24 1987. Man [?] experiment
Don Massa
Experiment for June 25.
Tape from Massa with signals from whales.
3.3 KH signal. 25 ms 100 ms [?] signal.
Messy [?] pulses back.
Lots of activity. many tape recordings photographs of [--?--]

Massa J-9 U.S. Navy. Broadband.
(U.S. Navy). Experiment send sound from [?]
Humpbacks

(Hgs- 15) Hydrophone.
(TR25 TR16)
Record sounds in water.

Greg [?] Early – Pilot whales – 3 young.

M1002 August [--?--] 6 – School [--?--]
Porthole [--?--]

Lichtfield Communication Camp Box 162
Adelphia N.J. 01710
William S. Coury Consultant. Lonboat Key Florida 33548
813 383 6689

Susan Lewis – Tech Review – Bullet Photos –

Massa

]]> Comment on HEE-NC-40352 by Claire Calcagno http://edgerton-digital-collections.org/galleries/museum/hee-nc-40352/comment-page-1#comment-1248 Claire Calcagno Tue, 15 May 2012 21:37:24 +0000 http://edgerton-digital-collections.org/galleries/museum/hee-nc-40352#comment-1248 See Lab Notebook #11, p. 51 for Edgerton's copy of this prize-winning picture taken by Joe Costa of the New York Daily News. See Lab Notebook #11, p. 51 for Edgerton’s copy of this prize-winning picture taken by Joe Costa of the New York Daily News.

]]> Comment on Edgerton Lab Notebook 11, Title-page by AKD http://edgerton-digital-collections.org/notebooks/nb11_001/comment-page-1#comment-1230 AKD Sun, 13 May 2012 17:55:45 +0000 http://edgerton-digital-collections.org/notebooks/nb11_001#comment-1230 This NB starts September 17, 1940 (not 1930) as indicated on the list of notebooks. This NB starts September 17, 1940 (not 1930) as indicated on the list of notebooks.

]]> Comment on HEE-NC-57001 by Bill Em http://edgerton-digital-collections.org/galleries/museum/hee-nc-57001/comment-page-2#comment-1221 Bill Em Fri, 11 May 2012 21:35:52 +0000 http://edgerton-digital-collections.org/galleries/museum/hee-nc-57001#comment-1221 This needs to be appreciated for the time period this was taken in. Nowadays capturing this moment is trivial as we can take multiple high-speed exposures and select which ever one we want. In this day, they had to capture this images just to see what was going on. We are so spoiled in this day and age. This needs to be appreciated for the time period this was taken in. Nowadays capturing this moment is trivial as we can take multiple high-speed exposures and select which ever one we want. In this day, they had to capture this images just to see what was going on. We are so spoiled in this day and age.

]]> Comment on HEE-NC-57001 by JimJim http://edgerton-digital-collections.org/galleries/museum/hee-nc-57001/comment-page-2#comment-1206 JimJim Sun, 06 May 2012 18:05:22 +0000 http://edgerton-digital-collections.org/galleries/museum/hee-nc-57001#comment-1206 insensible picture it should be either the drop on the top be lower or the surface of liqiud be smooth insensible picture
it should be either the drop on the top be lower or the surface of liqiud be smooth

]]> Comment on Edgerton Lab Notebook EE, Page 07 by Tom Callas http://edgerton-digital-collections.org/notebooks/nbee_035/comment-page-1#comment-1202 Tom Callas Sat, 05 May 2012 21:31:00 +0000 http://edgerton-digital-collections.org/notebooks/nbee_035#comment-1202 p.7 March 20 1950 Harold E. Edgerton [stamp:] CONFIDENTIAL Considerable effort has been put into a rapid capping shutter of the following type. Fuse wire vaporization into a glass lined volume. The lead vapor deposits on the walls and stops the light. The operating time is about 50 us. Present circuit 45mf 3000 volts 4C[?]45 thyratron for energy. [diagram] [labeled "fuse shutter"] The rapatronic shutter with a small glass slug is being tested now. This has a 5 ns. [nanosecond] duration with 1/5000 off to on ratio. A double glass slug is being made by Polaroid with an [x?x] to [x?x] ratio of 1/10 to the 6th power or 1/10 to the 7th power. Twice as much energy is required to fire this Photos of stationary objects have been taken with both [x?x] the single and the double slug. Harry Smith ¶ Bill Ward are working on the Rapatronic shutters. Capt. Hale Mason and Frank Strabala [spl? worked on the fuse shutter. Dr. Brian OBrien [spl?] from Rochester was here on Sat. march 18 for a conference. [stamp:] CONFIDENTIAL p.7
March 20 1950
Harold E. Edgerton

[stamp:] CONFIDENTIAL
Considerable effort has been put into a
rapid capping shutter of the following type.

Fuse wire vaporization into a glass lined
volume. The lead vapor deposits on the walls and
stops the light.

The operating time is about 50 us.

Present circuit 45mf 3000 volts
4C[?]45 thyratron for energy.

[diagram] [labeled "fuse shutter"]

The rapatronic shutter with a
small glass slug is being tested now. This has
a 5 ns. [nanosecond] duration with 1/5000 off to on ratio.

A double glass slug is being made by
Polaroid with an [x?x] to [x?x] ratio of 1/10 to the 6th power or 1/10 to the 7th power.
Twice as much energy is required to fire this
Photos of stationary objects have been taken
with both [x?x] the single and the double slug.

Harry Smith ¶ Bill Ward are working on the
Rapatronic shutters.

Capt. Hale Mason and Frank Strabala [spl?
worked on the fuse shutter.

Dr. Brian OBrien [spl?] from Rochester was here on Sat.
march 18 for a conference.
[stamp:] CONFIDENTIAL

]]> Comment on HEE-NC-52012 by steven http://edgerton-digital-collections.org/galleries/museum/hee-nc-52012/comment-page-1#comment-1182 steven Mon, 30 Apr 2012 19:04:53 +0000 http://edgerton-digital-collections.org/galleries/museum/hee-nc-52012#comment-1182 Please correct spelling "photogrpah" Please correct spelling “photogrpah”

]]> Comment on Edgerton Lab Notebook T-1, Page 04 by Claire Calcagno http://edgerton-digital-collections.org/notebooks/nbt-1_009/comment-page-1#comment-1177 Claire Calcagno Mon, 30 Apr 2012 14:42:00 +0000 http://edgerton-digital-collections.org/notebooks/nbt-1_009#comment-1177 Comment about the above page here... Comment about the above page here…

]]> Comment on Edgerton Lab Notebook T-1, Page 04 by Claire Calcagno http://edgerton-digital-collections.org/notebooks/nbt-1_009/comment-page-1#comment-1176 Claire Calcagno Mon, 30 Apr 2012 14:41:38 +0000 http://edgerton-digital-collections.org/notebooks/nbt-1_009#comment-1176 10-13-27 Speed Control by the Thyratron Tube. A mercury arc rectifier is made by the General Electric Co which has grids around the anodes. This rectifier is called the thyratron. The sketch shows the general layout of the tube. The circuit shown below was devised to control speed of the D.C. motor by varying its field current. [Circuit diagram with annotations as listed below] Tuned for 60 cyc. A tuned circuit is put on the alternator. This is a parallel circuit of inductance and capacitance and is tuned for 60 cycles. A current transformer is put in the line going to the tuned circuit. Its secondary is connected in series with the primary of the grid potential transformer. [Return to main text] The whole scheme of control is to sift the phase relation between the grid potential and the anode potential. These are shown on a vector diagram. To the grid potential is added a potential which depends upon the frequency. This comes from the C.T. in the tuned circuit 10-13-27

Speed Control by the Thyratron Tube.

A mercury arc rectifier is made by the General Electric Co which has grids around the anodes. This rectifier is called the thyratron. The sketch shows the general layout of the tube.

The circuit shown below was devised to control speed of the D.C. motor by varying its field current.

[Circuit diagram with annotations as listed below]

Tuned for 60 cyc.

A tuned circuit is put on the alternator. This is a parallel circuit of inductance and capacitance and is tuned for 60 cycles.

A current transformer is put in the line going to the tuned circuit. Its secondary is connected in series with the primary of the grid potential transformer.

[Return to main text]

The whole scheme of control is to sift the phase relation between the grid potential and the anode potential. These are shown on a vector diagram. To the grid potential is added a potential which depends upon the frequency. This comes from the C.T. in the tuned circuit

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