IMPROVEMENTS IN MACHINERY FOR TAPPING OR SCREWING NUTS
Year: 1877

page_text: LETTERS PATENT to Titus Mason, of Birmingham, in the County of Warwick,
Machinist, for the Invention of "IMPROVEMENTS IN MACHINERY FOR TAPPING
OR SCREWING NUTS."
Sealed the 28th May 1878, and dated the 1st December 1877.
PROVISIONAL SPECIFICATION left by the said Titus Mason at the Office of
the Commissioners of Patents on the 1st December 1877.
TITUS MASON, of Birmingham, in the County of Warwick, Machinist.
PROVEMENTS IN MACHINERY FOR TAPPING OR SCREWING NUTS."
"IM-
This Invention has for its object certain improvements in nut-tapping machines,
by which such machines are rendered self-acting, and are thus capable of turning
out a much larger amount of work with reduced labour.
The machine consists of the usual framework with driving shaft and gear, and it
is fitted with a long box chuck or hopper, into which the blanks are placed; the
tapping tool is fixed at the lower end of this chuck, and is started by means of a
cam. As each nut is tapped, the tool is withdrawn by means of a balance weight,
freeing the nut from the chuck, when another blank falls into the position for
tapping, and so on until the chuck or hopper is empty.
In front of the chuck there is a slide guide, which is worked by a lever from the
balance weight, which is to prevent the twisting or dropping of the nut from the
chuck until the tapping tool is restarted.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Titus Mason in the Great Seal Patent Office on the 1st June
1878.
TITUS MASON, of Birmingham, in the County of Warwick, Machinist.
PROVEMENTS IN MACHINERY FOR TAPPING OR SCREWING NUTS."
"IM-
This Invention has for its object certain improvements in nut-tapping machines,
by which such machines are rendered self-acting, and are thus capable of turning
out a much larger amount of work with reduced labour.
The machine consists of the usual framework with driving shaft and gear, and it
is fitted with a long box chuck or hopper, into which the blanks are placed; tho
tapping tool is fixed at the lower end of this chuck, and is started by means of a
cam. As each nut is tapped, the tool is withdrawn by means of a balance weight,
freeing the nut from the chuck, when another blank falls into position for tapping,
and so ou until the chuck or hopper is empty.
In front of the chuck there is a slide guide, which is worked by a lever from tho
balanced weight, which is to prevent the twisting or dropping of the nut from the
chuck until the tanning tool is restarted
Sheet A represents a plan of the machine as seen from above; and Sheet B, a
side elevation of the machine.
(A) is the box chuck into which the blanks to be tapped are fed; (G) is the
tapping tool held in a spring chuck (H), and started by means of a screw cam (B);
(K, K,) are fast and loose pulleys carrying a band, and driving the machine through
the toothed wheels (L, L,), pinions (M, M), and shaft (O); C is a friction roller
receiving the impact of the screw cam (B); (X, X, X,) is the table or framework of
the machine. When the nut has been tapped, the tapping tool is withdrawn by the
action of the balanced weight (D) and lever (F), which lever also works the slide
guide (E) in front of the chuck to prevent the nut under operation from twisting or
dropping until the tap is restarted.
The tapping tool (G) is held by the spring chuck (H) until the shank of the tap
is covered with the tapped nuts, when by actuating the lever (I) the tap springs
out, the nuts are released, and the operation is repeated.
Having thus described the nature of my said Invention, and the manner in which
the same is to be performed, I claim, the arrangement and combination of the
several mechanical parts forming automatic or self-feeding machinery for tapping or
screwing nuts, substantially as herein more fully set forth and specified.
In witness whereof, I, the said Titus Mason, have horeunto set my hand and
seal, this Twenty-ninth day of May, in the year of our Lord One thousand
eight hundred and seventy-eight.