USRE6350E - Improvement in bit-braces - Google Patents

Improvement in bit-braces Download PDF

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Publication number
USRE6350E
USRE6350E US RE6350 E USRE6350 E US RE6350E
Authority
US
United States
Prior art keywords
bit
socket
brace
nut
braces
Prior art date
Application number
Other languages
English (en)
Inventor
Ghaelbs H. Stockbeidge
Original Assignee
By Meske Assigixmeots
Filing date
Publication date

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  • FIG. 1 is an elevation of my improved brace or bit-stock with a bit placed therein ready for use.
  • Fig. 2 is an axial section of the socket part of the brace and of the nut which surrounds it.
  • Fig. 3 is a like axial section, showing the shank of the bit in the socket of the brace.
  • Fig. 4 is a cross-section on the line so a, Fig. 3, looking upward into the socket.
  • This invention relates to means for fastenin g bits or other tools in the sockets of braces or bit-stocks; and it consists in a novel mode of securing the bit or other tool therein, involving a peculiar and novel construction of the lower part of the brace or stock.
  • the letterA designates a brace or bitstock, the lower end of which is formed with a socket, F, to receive the shank of a bit or other tool.
  • the letter B designates a nut, which is placed upon the socket of the brace, working on a screw-thread which is cut around or upon the exterior of said socket.
  • the base of the nut B extends below the base of the socket, and carries two dogs, C C, which are pivoted within said nut, near its base, on opposite sides, where suitable recesses are made to receive them.
  • the ends of said dogs extend below the said nut, their grasping-ends being curved or bent inward toward each other, so that they may come against the body of the bit when its shank has been inserted in the socket of the brace.
  • the nut When it is desired to release the bit the nut is moved downward, so as to remove the jaws cl (1 of the dogs out of contact with the inclined surfaces 1) b, when they are free to be moved away from each other, and to let the shank of the bit or other tool pass out between them.
  • the direction of the screw-thread on the ring E of the nut is contrary to the direction in which the bit or other tool is to be turned in working with it, in order that the nut shall be kept up on the socket while one is operating the brace.

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