US Patent: 2,675,744
|
| Machine for Forming Screw Driver Bits of the Fluted Type
|
|
Patentee:
|
|
| John N. Petre (exact or similar names) - Orchard Park, NY |
| Manufacturer: |
| Not known to have been produced |
|
|
Patent Dates:
|
| Applied: |
Feb. 01, 1951 |
| Granted: |
Apr. 20, 1954 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Stan Schulz
|
|
Description: |
| John Slowers - patent attorney
This invention relates to a machine for forming fluted bits upon an end of the shank of screwdriver according to the method disclosed my co pending divisional application, Serial No 275,620, filed March 8,1952 Screw drivers of the fluted bit type are known in the trade as "Phillips" screw drivers and are of the substantial construction shown and described, in the Phillips patent, No. 2,046,837, both of which were issued on July 7, 1936. screw -drivers are cooperative with screws of the particular type which are known in the trade as "Phillips" screws. These screws are of the substantial construction shown and described in Phillips Patent No. 2,046,837 and the Phillips and Fitzpatrick patent, No. 2,046,839, also issued July 7, 1936, and are characterized by sockets special form in their heads. These sockets provide webs which, in relation to the vertical longitudinal axes of the sockets, are of re-entrant angular contour and have rather sharp which extend downward from the upper face the screw head. The webs are separated delimited by recesses, which extend radially in relation to the vertical or longitudinal axes of dimensions of the screw heads and their sockets. The fluted bits are generally polygonal in cross section and conform generally in cross contour to the cross sectional contour of sockets in the heads of the "Phillips" screws. The conforming cross sectional contours of the and the sockets in the screw heads may be as shown, for example, on Sheet 2 of the of the Phillips Patent No. 2,046,837. In practice, however, the bits and cooperating screw head recesses have been made of general outline
|
|
