IMPROVE- MENTS IN SEWING MACHINES
Year: 1861

page_text: PROVISIONAL SPECIFICATION left by Victor Charles Givry at the
Office of the Commissioners of Patents, with his Petition, on the 3rd
July 1861. A communication from abroad by Louis Theodore Givry,
of Rue Saint Lazare, Paris, France.
I, VICTOR CHARLES GIVRY, of Old Bond Street, in the County of Middlesex,
Importer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN SEWING MACHINES," communicated to me from abroad by Louis
Theodore Givry, of Rue Saint Lazare, Paris, France, to be as follows:-
According to this Invention connecting arms, links, or connections are
employed for transmitting motion, the same being jointed or properly con-
nected to the parts from which they derive, and to those to which they com
municate their motion.
. For imparting reciprocating motion to or actuating the needle, instead of a
continuous rigid rod or bar a connecting arm, bar, rod, link, or piece is used,
jointed or connected at one end to the needle holder or carrier, and at the
other end to a crank, disc, or wheel, or equivalent contrivance, from which it
receives motion. I prefer to construct the crank disc with teeth on the edge
so as to form a toothed wheel (or combine it with a toothed wheel) and fix it
on a shaft to which motion is communicated by hand wheel or strap and
pulleys, the driving pulley being on a shaft below the base plate, and worked
by treadle or steam, or by other means.
For actuating the presser feeder or "foot," I use cams, preferring to attach
a cam on the toothed wheel (whence the needle is driven), which cam acting

page_text: on a friction roller attached to a lever connected to the "foot" or presser,
lifts the latter at the proper intervals, while the feed or back motion is
imparted to the "foot" by a cam on another toothed wheel below and in gear
with the former, this cam acting on a friction roller on the foot, which is
brought back by a spring. The hook or bent hooked or holding needle which
is under the table or base plate may be adapted as a sewing needle, or for
helping to form the stitch for "knot stitching," or work in which two threads
are required. This needle is actuated by a jointed arm, or series of arms,
links, or bars, which I prefer to accomplish by a cam on an upright shaft in
gear with the horizontal shaft, acting on a friction roller in a slotted arm
guided by studs and brought back by a spring, there being at the end of the
arms a bell-crank lever arrangement holding a grooved and bent needle which
works at an orifice in the table whereat the upper needle acts, and has thread
led to it through guide eyes from a reel or spindle pivoted under the table;
this arrangement may be adapted for working shuttles, adding or substituting
a box, race, or guide groove at the place of one of the links. By having the
upper shaft and one of the underneath links, arms, or motion bars of the
desired length, the machine will serve for veils and other long articles, or where
the needle should be at some distance from the body of the machine. The
upper and under needles might be actuated by cranks or crank arms at the
ends of the horizontal shaft, but I prefer the other arrangement. In some
cases the table may have a box or drawer for work and other things below it.
I may mention that cheap machines combining the improvements may be
constructed of malleable or other castings by casting quantities of pieces or
parts from patterns, and then putting the proper ones together as required to
make up into machines (filing or planing to get the parts true).