What is it?

[scifan57]

It's a cribbage board,it's used to keep score in the game of cribbage.

 

[AdmiralAdama]

Wow. I haven't turned out the light yet and the challenge is won.
You're up sir.
AA

 

[scifan57]

Aye,Aye,Admiral.

 

[scifan57]

What are we looking at?Who made it?What did it cost when new?

 

[scifan57]

Here's another picture.

 

[Richard Brown]

It looks like an early mobile phone nicknamed the brick, although the ones I have seen were dark grey or black.

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[Richard Brown]

A bit of Googling has given me Motorola as the manufacturer this phone was produced in 1989 and cost £1765!

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[scifan57]

Correct,here are some better photos.
With 30 minutes of talk time and 8 hours of standby time,you didn't waste time talking too much.
All this was yours for the bargain price of $3,995.00 in 1983 dollars.





Your turn,Richard.

 

[Richard Brown]

Cheers Scifan. Here's mine.

What is this object called?

What is it used for?



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[scifan57]

It's called a Sector and was used for calculation until it was made obsolete by the introduction of the slide rule.

http://www.mathsinstruments.me.uk/page37.html

 

[Richard Brown]

It's called a Sector and was used for calculation until it was made obsolete by the introduction of the slide rule.

http://www.mathsinstruments.me.uk/page37.html

Spot on Scifan. Were sectors ever used in the Navy?

That's an interesting website. I rely on a book of drawing and surveying books in my library. The actual objects can be costly to collect.

Your turn.

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[scifan57]

I have no idea if sectors were ever used in the navy.I expect they were,however,as naval gunnery requires calculations that are quite complicated.

Here's another site that may be of interest.
http://sliderulemuseum.com/Rarities.htm

 

[scifan57]

Here's one.
What is it?When was is developed?What was it used for?

 

[AdmiralAdama]

Looks like you're showing us the right hand 1/3rd (look down view) of the American designed and manufactured "Norden bombsight."
A copyrighted on-line schematic diagram describes the device as a "tachometric bombsight used by the United States Army Air Forces (USAAF) and the United States Navy during World War II, and the United States Air Force in the Korean and the Vietnam Wars to aid the crew of bomber aircraft in dropping bombs accurately."

A Wiki entry refers to the Norden as "a mechanical computer that calculated a bomb's trajectory based on current flight conditions, and a linkage to the bomber's autopilot that let it react quickly and accurately to changes in the wind or other effects. Together, they allowed for unprecedented accuracy in day bombing from high altitudes."

Work on the bombsight began in the 1920s by Dutch engineer Carl Norden. The one you have, apparently well preserved in your collection room, is one of the "M" series sights. It looks similar to a copyright image of a Norden sight mounted in a U.S. Air Force B-17 bomber. There is a reference to the Norden bombsight in an article on the atomic bombing of Hiroshima, using the "Enola Gay" B-17 bomber near the end of the Second World War."

AA

 

[scifan57]

Correct,Admiral.
Take us on a journey into the unknown.