US Patent: 2,607,054
|
| Chucking Mechanism for Tapping Machine
|
|
Patentee:
|
|
| James Howard Williams (exact or similar names) - Lincoln, RI |
| Manufacturer: |
| Not known to have been produced |
|
|
Patent Dates:
|
| Applied: |
Dec. 28, 1949 |
| Granted: |
Aug. 19, 1952 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Joel Havens
|
|
Description: |
| Harry Dexter Peck - patent attorney
This invention relates to improvements in chucking mechanism for a tapping machine. More especially it has to with improved means for permitting a pipe fitting to be manually placed in the chucking mechanism and a moderate holding pressure applied and thereafter applying power pressure to accurately position the fitting and hold it firmly in place while the threads are cut. Chucking mechanisms heretofore used have been objectionable because of the loss of time required to maintain them in operating condition. This-has been due in large part to the presence of numerous flat surfaces between the relatively moving parts on which surfaces the trimmings or chips from the work being cut could fall and become entrapped between the mating moving surfaces. This would cause rapid and serious wear and require frequent repairs to the mechanism. It is, a principal object of the present invention to mount certain of the parts of my improved mechanism on a single shaft which extends horizontally in the tapping machine and a portion of which underlies, the point of intersection of the axis of the cutting tools. The provision of this single shaft as the guideway on which the moving parts slide presents no surfaces on which trimmings will normally remain. Such as may momentarily balance on the surface of the shaft, are easily dislodged and fall below the shaft, before they can work themselves in between the shaft and the parts which slide upon it or the bearings through which the shaft itself slides. It is a further object of the present invention to provide a pair of jaw members which can, be manually positioned against a fitting and be so, held-by spring means exerting a. moderate pressure on the fitting. It is a still further object to provide pressure actuated means for thereafter moving the shaft and with it the jaw members to position the fitting in proper alignment with the cutting tools and to maintain the fitting in said position while the tapping occurs. Upon withdrawal of the tools from the now threaded fitting, the pressure actuated means returns the jaw; members to a position where the moderate holding pressure can be manually released, the threaded fitting, removed from the jaw and an unthreaded piece of work inserted.
|
|
