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The
chuck jaws,
shown at the upper and lower left corners of the image, only vaguely
resemble
the patent drawings.
However,
the actual
jaws do adhere to Mr. Peck's claims in US 814,320:
I claim-
1. In a chuck, a pair of
opposed
jaws, an abutment-block carried by the jaws and extending transversely
across the interval between the inner ends thereof, the projection of
said
abutment being past the gripping portions of the jaws contiguous to the
block, whereby such jaw portions overlap the block and maintain an
axially
centered relation thereto, means for yieldingly pressing the jaws apart
and for yieldingly connecting the inner ends thereof, and means for
closing
the jaws upon a tool.
2. In a chuck, a pair of
opposed
jaws, a loose abutment-block arranged between the inner ends of the
jaws
and overlapped by the contiguous portions of the gripping faces,
pivot-pins
holding the jaws and block in loosely-engaged relation, a spring held
in
position to the point of support for the jaws and block and arranged to
press the jaws apart, and means for closing the jaws.
3. In a chuck, a pair of
opposed
jaws having recessed inner ends, an abutment block arranged between the
inner ends of the jaws and within the recesses thereof, pin members for
holding the jaws and block in loosely connected relation, a spring
arranged
to normally support the jaws at both their inner and outer ends, and
means
for closing the jaws.
WILLIAM
ALLEN
PECK.
What Peck
did was to
use the spring of claims 2 and 3 to perform simply the function of the
stalks on the complex block shown in the patent drawing. |
The
upper handle
or pad is much thicker than that of most braces of the period, but
there
is no ball like that shown in the patent drawing at right from US
814,318,
and there is no large headed adjustment screw visible on the top of the
pad, also shown at right. However, instead of the ball, there is
a hardened steel wear plate carried in a cast iron threaded cup and a
presumably
hardened tip with a centering tit on the end of the brace's arm, all as
shown at top right in the upper image and covered by Claim 1
below.
There is even a split washer, as put forth in the claims:
Having thus described
my invention,
what I claim, and desire to secure by Letters Patent of the United
States,
is --
1. The combination with
the
arm of a bit brace or the like, of a hub member fitting the arm and
having
a threaded end, a knob body, a chambered nut arranged in the knob body
and adjustably engaging the threaded end of the hub member, a split
washer
received within the nut and held thereby loosely interlocked with the
arm
of the brace, and a centering bearing projection arranged at the end of
the arm in the nut and receiving the thrust from the head or base of
the
nut.
2. The combination with
the
arm of a bit brace or the like, of a hub member fitting the arm, a
knob-body
provided on its outer side with a central hole, a centrally-chambered
nut
arranged in the knob-body and detachably engaging the hub member, said
nut having a threaded opening in its head or base, a retaining device
received
within the nut and held thereby loosely interlocked with the arm of the
brace, a bearing projection at the end of the arm within the nut, and a
screw arranged through the hole in the knob and engaging the threaded
opening
in the head or base of the nut. (Claim 3 not shown)
WILLIAM
ALLEN
PECK.
Note that
the hub member
is quite different from the patent drawing as well. |
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