Lou's Place in Cyberspace
CASTLE VALLEY MILL
THIRD FLOOR-CLUTCH DEVICE
Near the front of the mill on the third floor is a group of vertical 4"X4" vertical posts, each showing they once supported bearing journals, having notches in the wood where they were once located.
These journals once supported axel shafts and their alignment indicate the path the drive shafts once occupied. This allowed the reconstruction of the mills power distribution system in the virtual Mill model.
At the location where one horizontal shaft aligned at a ninety degree angle with another shaft and group of journals at the same height, it was apparent that the power was transferred at this point from a west-east direction along the north wall, to a north-south direction across the front of the mill which faces east.
From the locations of drive pulleys on both the left and right front elevators, it became apparent how the drive pulleys for the elevator heads were arranged on the axel shafts.
At the junction where the 90 degree power transfer occurs, there are the remains of what was once a manual clutch device, used to disengage the power being transferred to the front pulley drive system.
The large wooden clutch lever mounted vertically, has a movement distance of two and one half inches from its pivot point. The operating lever ends in a teardrop shaped vertical handle used to move the lever. It is made of wood and hand carved. It may be part of the original mill structure, when it was constructed as an "Oil" mill.
After investigating various types of 19th century disengagement devices (Clutch) it seems a sliding pinion gear on a keyed shaft would have been used to engage or disengage the front horizontal drive shaft. Disengagement/engagement would have taken place only after the machinery was stopped.
Power coming to the third floor by the main vertical drive shaft from the machinery in the basement level, was taken off the main Power Transfer Frame in the rear of the mill to the horizontal west-east drive shaft by a pulley and belt arrangement.
The power was transferred along the north side of the mill via mounted journals and support posts. At the front of the mill was the power transfer point, where a set of angled bevel gears transferred the power to the front drive pulleys.
Across the front of the mill were two horizontal shafts, holding belt pulleys used to drive other mill machinery located in the front of the mill.
One belt passed thru slits in the flooring to drive the small elevator head and auger trough located on the second floor. (See Second Floor) Others were used to drive the two front elevator heads, overhead winch, and other machinery no longer in position.
View of vertical clutch arm. Journal is missing, but shaft hole indicates where a shaft once was located. Hand grip is at the bottom and pivot point is at the top. Arm moves horizontally in this view looking towards front of mill.
View of clutch arm from front looking towards rear of mill.
View showing clutch arm (top left) and arrangement of the bearing journals across the front vertical 4"X4" timber supports. Note how the top row of journals align with the journal in the clutch arm mechanism. Most of the journal blocks are missing.
This view, looking down on the front section of the mill, shows how it looks presently. In the foreground, on both sides of the floor opening, are the Left and Right front elevator mechanisms with their associated drive pulleys. Behind them are the clutch arm Center top), and the 4"X4" vertical supporting timbers with notches where the journals were once located. This view is looking towards north east corner of the mill.
View showing same supporting timbers shown above but from a lower angle. Here one half of the journal blocks have been inserted in the notch locations indicated in the illustration above. These journals once held two horizontal drive shafts.
View showing front section of mill. In foreground is the Eureka Brush Machine. Beyond it is the Right front elevator head and to its left is the clutch mechanism. To the right of the floor opening is the Left front elevator, and behind it the vertical journal support timbers.
View showing the power take off from the rear main vertical drive shaft. The shaft from the main bevel gear, which ran horizontally towards the rear of the mill, drove a belt pulley arrangement driving a horizontal shaft (top left) going to the front of the mill. Shaft on bottom right powered the rear elevator heads and other equipment. Top bevel gear drove Central Rear Elevator, and small hanging bolter located behind rear elevators. This view is looking towards the front of the mill from rear. Some bracing supports are not shown for clarity.
View showing main drive shaft with double bevel gear pinion power take offs. Pulley and shaft in right foreground was drive shaft to front of mill and clutch. Lower large belt pulley powered an additional power take off and clutch, for operating the Eureka Brush Machine and other equipment.
Another view of power take-off to drive horizontal shaft going to front of mill.
View of bevel gears and sliding mechanism connected to clutch arm. Shaft and gear on left is power from rear of mill. Gear and shaft on right (diagonal from top left to bottom right) is the transverse drive shaft running across the front of the mill powering other equipment. Pulling clutch arm back would disengage the power to the front gear and shafts. Belt in lower foreground powers front right elevator head. Shafts colored blue for clarity.
View showing the drive shaft arrangement (in blue) and the various drive pulleys (in Red). Both left and right front elevator heads were powered by this drive system. Note pulley in foreground, which powered elevator head on second floor. (See second floor)
View of clutch arm from front
View of shaft to front of mill to clutch assembly
Overhead view of clutch mechanism. Colors are varied for clarity. Bevel gear on right center moved to right to disengage main drive gear (center top) Note drive pulley for Right Front Elevator head (in red) on left edge of image.
Clutch looking toward rear of mill. On left in distance is the Right Front elevator head.
Clutch mechanism and bearing journals located to the right. View towards front of mill. White blotches are remains of mud wasp hives. The third floor was like a hornet/wasp condominium!
Front drive journal base detail.