IMPROVED MEANS FOR PREVENTING NOISE OF SEWING MACHINES WHEN ATTACHED TO STANDS BY HINGES a
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Isaiah Hain at the Office of the
Commissioners of Patents on the 20th September 1882. Communicated
to him by John Benjamin Hain a person resident at Newark, Ohio, United
States of America.
ISAIAH HAIN, of the City and State of New York, United States of America.
"IMPROVED MEANS FOR PREVENTING NOISE OF SEWING MACHINES WHEN ATTACHED
TO STANDS BY HINGES a communication to me by John Benjamin Hain a person
resident at Newark, Ohio, United States of America,
"
The binges usually employed for attaching Sewing Machines to stands or tables
are common metal ones with flat leaves or flanges, one of which is firmly secured
by screws or otherwise to the bed-plate of the machine, and the other is screwed
to the stand, so that the free side of the machine may be conveniently turned
back on the hinges to examine, oil and repair the running parts of the machine.
The free side of the bed-plate or that part opposite the hinges is usually made
to rest, when in position, upon short rubber posts, but the sound of the machine
when running is conveyed to the stand or table through the medium of the hinges
and screws attaching the bed-plate to the said stand or table, and the noise is
thereby greatly augmented.
The object of my Invention is to prevent this annoying result and to render the
running machine comparatively noiseless, and which I effect by muffling the hinges
and screws.
For this purpose I take a flat piece of rubber (which is a good non-conductor of
sound) of the requisite size and shape to completely cover both sides, of the flange
to be attached to the stand, the said rubber having holes corresponding to the
screw holes in the hinge. This flange or half of the hinge is completely enveloped
in the muffler when attached to the stand, the underside resting entirely on the
rubber and the upper side being covered with the same.
The screws pass through the holes formed in the muffler, the heads of the
same being kept from contact with the metal of the hinge by the intervening
rubber.
The muffler is preferably formed with raised borders or ribs so as to entirely
cover the ends of the flange, to ensure a perfect separation of the flange and the

page_text: stand or table to which the hinge is attached. That portion of the surface of the
muffler over or in contact with the countersink formed in the flange for the screw
heads may be raised to fit into the countersink, with a corresponding depression on
the opposite surface into which the screw head will fit, so that the screw head will
be below the surface of the muffler, which will prevent its coming in contact with
the other portion of the hinge or with the screws which secure the same to the
bed-plate of the machine.
The muffler may be formed of two pieces of rubber, but one is preferable,
and it should have a groove along the line of its fold on the outer side, so that
the muffler will perfectly fit the hinge and bear evenly upon the surface of the
flange.
The holes in the flange should be made somewhat longer than the body of the
in order that no portion of the screw may come in contact with the flange
of the hinge.
screw,
The hinge may be secured to the bed-plate and also to the stand or table
by means of nails or rivets, but screws are more convenient and otherwise
preferable.
The muffler may be formed of any suitable yielding substance which is a good
non-conductor of sound, but I prefer rubber or some material of which rubber
forms a part.