IMPROVE- MENTS IN METAL TURNING LATHES.
Year: 1876

page_text: LETTERS PATENT to Allison Owen Swett, Henry Newton Sheldon; and James
Rollin Marble Squire, of Boston, in the County of Suffolk, and State of
Massachusetts, in the United States of America, for the Invention of "IMPROVE-
MENTS IN METAL TURNING LATHES. A communication from Henry Marcus
Quackenbush, residing at Herkimer, in the County of Herkimer, and State
of New York, in the United States of America.
Sealed the 30th June 1876, and dated the 20th January 1876.
PROVISIONAL SPECIFICATION left by the said Allison Owen Swett, Henry
Newton Sheldon, and James Rollin Marble Squire at the Office of the Com-
missioners of Patents on the 20th January 1876.
A
ALLISON OWEN SWETT, HENRY NEWTON SHELDON, and JAMES ROLLIN MARBLE
SQUIRE, of Boston, in the County of Suffolk, and State of Massachusetts, in the
United States of America. IMPROVEMENTS IN METAL TURNING LATHES."
communication to us from Henry Marcus Quackenbush, a person resident at
Herkimer, in the County of Herkimer, and State of New York, in the United States
of America.
This Invention has reference to the construction of the headstock of turning
lathes or other analogous machines, or the method of mounting the arbor therein,
the purpose of the Invention being to obtain such a construction of parts as will
enable a tight and close bearing to be ensured at all times with little labor and
trouble and to provide a lathe at very small cost, which the extreme simplicity
of this plan enables us to do.
The Drawings accompanying this Specification represent in Figure a central
and longitudinal section of the headstock of a lathe containing this improvement,
and in Figure 2 a transverse section of the arbor and sleeve, and Figure 3 is a
section of a modified form of construction. In these Drawings A represents the
nain frame of the headstock of a lathe, the same being in form and size as now
generally in use according to the character of the lathe to which it belongs, the
front standard of the said headstock being shown at B and the rear one at C.
Heretofore in the construction of headstock of lathes the two bearings of the

page_text: arbor have been formed upon or make part of such arbor, and are enclosed in boxes
which require more or less fitting.
In this Invention the front or main bearing is part and parcel of the pulley, by
which the arbor is driven, and together with the pulley, is susceptible of ready
adjustment upon such arbor, the said bearing being frustro-conical or tapering, and
received within a corresponding socket or box by which a close joint is preserved.
In carrying this Invention into practice in one simple form in which its prin-
ciple may be embodied, we provide ourselves with an arbor D, which is simply a
piece of round steel or iron of the requisite diameter and length, and we reduce
one end of this arbor to a pointed pivot, and step such pivot in a pocket b,
which may be simply countersunk in the standard C; or if greater nicety is
required may be of Babbitt metal let into such standard. We next provide a
pulley E which may be of any form or character desired, and cast upon or affix to
this pulley a hub c which we confine to the arbor by a set screw c, or by any other
means, and we then bore out the same to receive tightly the arbor D, and sub-
quently turn down the periphery of the pulley concentrically with such arbor, at
We then bore out
the same time turning down the hub e to a conic frustrum d
the standard B with a tapering seat to receive the bearing d and the headstock is
complete.
Among the advantages attaching to this Invention are the following
First. By simply loosening the screw e the pulley E. and arbor D may be
removed; and as this arbor may be composed of the shank of a drill or the
stem of a chuck, or may constitute part of some other tool, we are enabled to
readily and instantly withdraw one tool and substitute another so long as the
diameter of the shank or arbor does not vary materially.
Second. An important result reached by this Invention is the extreme simplicity
and cheapness of construction, as we avoid the nice fitting usually required about
the step at the rear end of the arbor.
Third. Owing to the length of the pulley E and hub c, they stiffen and strengthen
the arbor D, and we are enabled to use a smaller and less expensive piece of steel
whereof to make such arbor, thereby effecting one point of economy.
Fourth. The only perceptible wear upon the arbor is at its rear pivot, which is
very slight and practically nothing; owing to thetapering form of the bearing or
plug da tight joint is always preserved, and the wear is very slow.
We do not confine ourselves to the precise construction of parts, as herein shown,
as they may be varied somewhat without losing sight of the gist of this Invention,
which we consider to consist in transfering the main bearing from the arbor to an
independent sleeve or hub secured to or making part of the pulley, and capable of
endwise adjustment upon said arbor, or secured to the arbor independent of the
pulley, as shown in Figure 3 of the Drawings.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Allison Owen Swett, Henry Newton Sheldon, and James Rollin
Marble Squire in the Great Seal Patent Office on the 30th June 1876.
ALLISON OWEN SWETT, HENRY NEWTON SHELDON, and JAMES ROLLIN MARBLE
SQUIRE, of Boston, in the County of Suffolk, and State of Massachusetts, in the
A
United States of America. IMPROVEMENTS IN METAL TURNING LATHES."
communication to us from Henry Marcus Quackenbush, a person resident at
Herkimer, in the County of Herkimer, and State of New York, in the United States
of America.
"
This Invention has reference to the construction of parts as will enable a tight
and close bearing to be ensured at all times with little labor and trouble, and

page_text: to provide a lathe at very small cost, which the extreme simplicity of this plan
enables us to do.
The Drawings accompanying this Specification represent in Figure 1 a central
and longitudinal section of the headstock of a lathe containing this improvement,
and in Figure 2 a transverse section of the arbor and sleeve, and Figure 3 is a
section of a modified form of construction. In these Drawings A represents the
main frame of the headstock of a lathe, the same being in form and size as now
generally in use, according to the character of the lathe to which it belongs, the
front standard of the said headstock being shown at B and the rear one at C.
Heretofore in the construction of headstock of lathes the two bearings of the
arbor have been formed upon or make part of such arbor, and are enclosed in boxes
which require more or less fitting.
In this Invention the front or main bearing is part and parcel of the pulley by
which the arbor is driven, and together with the pulley is susceptible of ready
adjustment upon such arbor, the said bearing being frustro-conical or tapering and
received within a corresponding socket or box, by which a close joint is preserved.
In carrying this Invention into practice in one simple form in which its principle
may be embodied, we provide ourselves with an arbor D which is simply a piece of
round steel or iron, of the requisite diameter and length, and we reduce one end of
this arbor to a pointed pivot a, and step such point in a pocket b, which may be
simply countersunk in the standard C; or if greater nicety is required may be of
Babbitt metal let into such standard. We next provide a pulley E which may be
of any form or character desired, and cast upon or affix to this pulley a hub c
which we confine to the arbor by a set screw c, or by any other means; and we
then bore out the same to receive tightly the arbor D, and subsequently turn down
the periphery of the pulley concentrically with such arbor, at the same time
turning down the hub e to a conic frustrum d. We then bore out the standard B
with a tapering seat to receive the bearing d and the headstock is complete.
Among the advantages attaching to this Invention are the following:-
First. By simply loosening the screw e, the pulley E and arbor D may be
removed; and as this arbor may be composed of the shank of a drill or the stem
of a chuck, or may constitute part of some other tool, we are enabled to readily and
instantly withdraw one tool and substitute another so long as the diameter of the
shank or arbor does not vary materially.
Second. An important result reached by this Invention is the extreme simplicity
and cheapness of construction, as we avoid the nice fitting usually required about
the step at the rear end of the arbor.
Third. Owing to the length of the pulley E and hub they stiffen and and
strengthen the arbor D, and we are enabled to use a smaller and less expensive piece
of steel whereof to make such arbor, thereby effecting one point of economy.
Fourth. The only perceptible wear upon the arbor is at its rear pivot, which is
very slight and practically nothing; owing to the tapering form of the bearing or
plug da tight joint is always preserved and the wear is very slow.
We do not confine ourselves to the precise construction of parts, as herein shown,
as they may be varied somewhat without losing sight of the gist of this Invention,
which we consider to consist in transfering the main bearing from the arbor to an
independent sleeve or hub secured to or making part of the pulley, and capable of
endwise adjustment upon said arbor, or secured to the arbor independent of the
pulley, as shown in Figure 3 of the Drawings.

page_text: ment upon the arbor D whereby the tapering plug d of the hub is fitted to its seat,
and advantages are obtained essentially as stated.
In witness whereof, we, the said Allison Owen Swett, Henry Newton
Sheldon, and James Rollin Marble Squire, have hereunto set our hands and
seals, this Third day of May. 1876.
ALLISON OWEN SWETT.
HENRY NEWTON SHELDON.
JAMES ROLLIN MARBLE SQUIRE.
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ALLISON OWEN SWETT.
HENRY NEWTON SHELDON.
JAMES ROLLIN MARBLE SQUIRE.
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