Improvements relating to Hand Drilling Machines.
Year: 1897

page_text: Date of Application, 28th Dec., 1897-Accepted, 16th Apr., 1898
COMPLETE SPECIFICATION.
Improvements relating to Hand Drilling Machines.
I, JAMES MURCHIE, of Traverse City, Grand Traverse County, State of Michigan,
Inventor, do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement:-
This invention relates to drilling machines, and its object is to provide a simple
and improved machine having a number of adjustments, whereby it may be arranged
in a great diversity of operating positions with respect to its supporting means.
The invention consists in the novel features of construction, and in the combina-
tion and arrangement of parts, hereinafter fully described and claimed, and illus-
trated by the accompanying drawing, in which:
Figure 1 is a perspective view of the machine in position for operation.
Figure 2 is a plan view.
Figure 3 is a sectional view of the drill stem and feeding device.
Figure 4 is a detail view of the adjusting bracket.
Figure 5 is a similar view of the bracket dog.
Figure 6 is a detail view of the crank and ratchet.
The frame proper consists of jaw A, formed with the integral right angle
arms B, B1, which support segment C formed with are slot D. Screw E is rigid with
jaw A, while screw is swivelled to arm B, and these screws support and adjust the
second or movable jaw G, the latter moving freely over screw E, being held thereto
in proper position by nut E¹, while the opening through which screw F passes is
screw threaded and engaged by said screw. These jaws serve to clamp and secure
the frame to the post or other object to be drilled. The angle at which the frame
is set with respect to such object is regulated by bracket GI mounted on screws E
and F so as to have free movement thereon, and provided at its lower end with set
screw H. With the inner upper end of this bracket bearing against the object to
be drilled or other support, the angle of the machine frame is regulated by adjusting
said screw either in or out. The spring pressed dog g is pivoted to the outer side
of bracket G1, its upper curved and serrated end g₁ entering a slot in the bracket
and normally engaging screw F and holding the bracket in desired position on the
clamp screws. Slight pressure of the hand is sufficient to retract the dog and free
the bracket for adjustment.
Arm I is hinged at its inner end to web bin the angle formed by arms B and B¹,
and extends outward over segment C, where it is formed with clamp J, also ear Ki
through which clamping screw K extends into slot D, for securing the hinged arm
at the desired position of adjustment on the segment. Adapted to be secured in
clamp J is an arm L, the same being turnable in the clamp and thereby adjustable
to any position required, and at the outer end of said arm is split clamp M.
Adjustably secured in this last mentioned clamp is another arm N, formed with
internally threaded socket portion O. Adjustable longitudinally through said
socket portion is externally threaded feeding sleeve P, in which bit socket Q is
rotatably secured, the latter having bit R detachably secured to its inner end,
and at its outer end carrying ratchet S. Mounted loosely on the stem is operating