Rim drilling 1897
Slightly more complicated rim drilling machine in 1897
The operation of the device is as follows: The rim to be drilled is slid over the ringtemplet G and caused-to rest upon the angledogs g. The clamping dogs B are then brought to bear upon the rim by a slight rotating motion given to the flat ring B, which, acting upon the clamping-dogs by means of the inclined slots in which the pins b I) travel, the rim is securely engaged in position to be drilled. Power is now applied to the pulley H, which causes the disk F to retate. The disk being brought into frictional engagement with the rubber roll by means of the spring E imparts motion to all the drills. Then the operator by means of the lever D gives a slight rotary motion to the disk D, to which are secured the links connecting the several drill-stocks, which imparts a reciprocating or feeding motion to the drill-stocks. The drills are thus forced to their work, and by reversing the motion the drills are withdrawn from the rim when the holes are bored. The rim is then removed from between the clamps and reversed and again clamped. A pin is inserted in one of the holes of the rim to serve as a guide for centering the holes to be drilled at the opposite angle, the pin serving as a guide for 10- eating the position of the holes to'be drilled. The rim is then clamped in position and the operation of drilling the holes repeated. It will thus be seen that every other hole is drilled at an angle corresponding with the incline of the spokes to be inserted. The vertical driving-shaft can be raised, throwing the operating-disk out of contact with the rubber rolls and thus causing the drills to stop by means of the foot lever I. A suitable locking'dog is provided on the foot-lever I to keep the operating-disk F out of contact with the rubber rolls or pulleys when so desired.
Another Drill from the Referee 1893
Slightly more complicated rim drilling machine in 1897
The operation of the device is as follows: The rim to be drilled is slid over the ringtemplet G and caused-to rest upon the angledogs g. The clamping dogs B are then brought to bear upon the rim by a slight rotating motion given to the flat ring B, which, acting upon the clamping-dogs by means of the inclined slots in which the pins b I) travel, the rim is securely engaged in position to be drilled. Power is now applied to the pulley H, which causes the disk F to retate. The disk being brought into frictional engagement with the rubber roll by means of the spring E imparts motion to all the drills. Then the operator by means of the lever D gives a slight rotary motion to the disk D, to which are secured the links connecting the several drill-stocks, which imparts a reciprocating or feeding motion to the drill-stocks. The drills are thus forced to their work, and by reversing the motion the drills are withdrawn from the rim when the holes are bored. The rim is then removed from between the clamps and reversed and again clamped. A pin is inserted in one of the holes of the rim to serve as a guide for centering the holes to be drilled at the opposite angle, the pin serving as a guide for 10- eating the position of the holes to'be drilled. The rim is then clamped in position and the operation of drilling the holes repeated. It will thus be seen that every other hole is drilled at an angle corresponding with the incline of the spokes to be inserted. The vertical driving-shaft can be raised, throwing the operating-disk out of contact with the rubber rolls and thus causing the drills to stop by means of the foot lever I. A suitable locking'dog is provided on the foot-lever I to keep the operating-disk F out of contact with the rubber rolls or pulleys when so desired.
Another Drill from the Referee 1893
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