BRAIN TEASERS
Brain Teasers User Profile

Max S.

rank
120
points
33
See full ranking list
short ranking list
118. saber zafarpoor 34
119. HOPE ABARANWOLU 34
120. Max S. 33
121. Praveena Karthik 33
122. Nešić Olivera 33
last 3 solved tasks
Solve this number puzzle. What will be the missing number? (6, 15, 28, 45, ??)
How many times can you subtract the number 5 from 25?
Solve Mathematical Puzzle: 4, 5, 6, 8, 11, 16, ?, 37, 58, 92

Screw pointing and threading machine patent

In 1852, Cullen Whipple, of Providence, R.I., patented his "Mechanism for Pointing and Threading Screw-Blanks in the Same Machine" (U.S. No. 9477). His new design incorporated additional cutters in the same threading machine he had patented on 18 Aug 1842 (No. 2754, reissued 5 Mar 1850). Before machines provided a point on screws, they had blunt ends, and it was necessary to drill a starter hole. In Oct 1840, he was one of ten incorporators of The New England Screw Co. After his original thread-cutting machine, he invented another for shaving the heads of screws (patented 6 Apr 1843) and one for removing the burs left in cutting the slots in the heads (patented 19 Apr 1843). He patented seven other screw-manufacturing devices.«

My friend asked me...

My friend asked me, "Why are you getting a divorce?"
I responded, "My wife wasn't home the entire night and in the morning she said she spent the night at her sister's house."
He said, "So?"
And I responded, "She's lying. I spent the night at her sister's house!"
Jokes of the day - Daily updated jokes. New jokes every day.
Follow Brain Teasers on social networks
This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.