Rolls-Royce Archives
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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Diagrams illustrating the sliding action and profiles of involute gear teeth.

Identifier  ExFiles\Box 114\1\  scan0093
Date  11th January 1937 guessed
  
0.185' DISTANCE FROM PITCH CIRCLE TO BASE CIRCLE
ADDENDUM 1.615'
PITCH CIRCLE
PITCH LINE
0.461
1.513
2''
PRESSURE ANGLE
BASE CIRCLE
N'
INVOLUTE ORIGIN
1 2 3 4 5 6 7
Fig. 6 SHOWING SLIDING ACTION OF INVOLUTE PROFILES OF A PAIR OF MESH-ING GEAR TEETH
PITCH CIRCLE
DEDENDUM
MAAG
-2.50
FELLOWS
TO -22.53
ADDENDUM
+0.69
+1.07
BROWN & SHARPE
SLIDING DIAGRAMS OF 12 TOOTH PINIONS
TO -∞
+1.0
0
-1.0
-2.0
-3.0
-4.0
-5.0
-6.0
-7.0
-8.0
PITCH CIRCLE
DEDENDUM
MAAG
-2.19
FELLOWS
-2.23
BROWN & SHARPE
TO -12.00
ADDENDUM
+1.0
+0.97
+0.71
0
-1.0
-2.0
-3.0
-4.0
-5.0
-6.0
-7.0
-8.0
Fig. 7 SLIDING DIAGRAM OF GEAR TOOTH PROFILE
  
  


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