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1-10 of 14-
Grasshopper Escapement
glathoppa
397 views
This short video presents the single pivot Harrison grasshopper escapement during construction and early testing of a 'replica' of his final longcase precision regulator. T...
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John Harrison RAS Regulator 'Replica' - Video 13 of 13
glathoppa
1,470 views
The thirteenth and final video in this series introduces the pendulum and its suspension and concludes with footage of the regulator shortly after completion (except for po...
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John Harrison RAS Regulator 'Replica' - Video 12 of 13
glathoppa
1,015 views
A pantograph and wooden template arrangement was used to engrave numerals onto three separate dials for hours, minutes and seconds. The 'handwriting' is a reproduction of t...
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John Harrison RAS Regulator 'Replica' - Video 11 of 13
glathoppa
2,157 views
Video 11 presents the grasshopper escapement and remontoire working in unison during construction and early testing (estimated to be 2005). Please note that the pendulum an...
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John Harrison RAS Regulator 'Replica' - Video 10 of 13
glathoppa
4,853 views
Further arbors (axles), wheels and pinions (gears) are added, in order to complete the movement train.
A device commonly referred to as 'Harrison's maintaining gear' is ...
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John Harrison RAS Regulator 'Replica' - Video 9 of 13
glathoppa
1,569 views
The previous video explained the principles of the remontoire mechanism in some detail.
In this video, the aerodynamic fly has been added, which slows the action down to...
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John Harrison RAS Regulator 'Replica' - Video 8 of 13
glathoppa
1,258 views
This video shows early testing of the remontoire. I should immediately explain that the remontoire mechanism incorporated within the 'replica' is a fairly inconspicuous alt...
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John Harrison RAS Regulator 'Replica' - Video 7 of 13
glathoppa
1,108 views
The construction process continues with completion of the remontoire arbor assembly, introduced in Videos 2 and 3.
A somewhat involved anti-friction arrangement is requi...
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John Harrison RAS Regulator 'Replica' - Video 6 of 13
glathoppa
869 views
Here's a great example of Harrison's 'anti-friction' arbor support system in action (explained in video 5 of the series).
You might have noticed that the anti-friction ...
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John Harrison RAS Regulator 'Replica' - Video 5 of 13
glathoppa
1,593 views
Apologies for the brief 'DVD Video RAM' message at 2 mins 10 seconds: please don't be mislead into thinking that the video has ended. Spielberg need have no fears of compet...
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