US Patent: 748,241
|
| Screw and Driver Therefor
|
|
Patentee:
|
|
| Edwin L. Walter (exact or similar names) - Scranton, PA |
| Manufacturer: |
| Not known to have been produced |
|
|
Patent Dates:
|
| Applied: |
Apr. 07, 1903 |
| Granted: |
Dec. 29, 1903 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Steve Gosselin
|
|
Description: |
| From the Patent description : The primal intent of this invention is to insure firm and positive connection between a screw and its driver without necessitating the expenditure of a great amount of energy to hold the driver in engagement with the screw when turning same, thereby enabling a greater amount of energy to be utilized for effective Work without useless labor and unnecessary fatigue of the operator.
The invention provides a novel form of interlocking joint between the screw and its driver, whereby a small amount of force serves to prevent slipping of the driver when in service. The joint comprises an axiallyinclined slot in the head of the screw and a correspondingly-inclined point or hit at the end of the driver, whereby when the screw and driver are held in longitudinal alinement with the said inclined point fitted in the said axially-inclined slot they are interlocked and held against longitudinal displacement. |
|
