Improvements in Hair Pin Making Machines.
Year: 1890

page_text: Date of Application, 17th June, 1890
Complete Specification Left, 17th Mar., 1891-Accepted, 25th Apr., 1891
PROVISIONAL SPECIFICATION.
Improvements in Hair Pin Making Machines.
I, HENRY WILLIAM TONKS, of Hockley Hill, Birmingham, in the County
of Warwick, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the construction and arrangement of parts constituting
machinery employed in the manufacture of hair pins, and consists of improvements
in such parts whereby the wires from which the pins are to be made, are held and
rolled, or rotated, during the pointing process.
In machines of this class, the wire to be pointed is carried between two surfaces,
the one (upper) surface, or slide having imparted thereto a reciprocating motion by
means of a connecting rod and a bell crank, which latter in its turn receives its
motion by means of a second connecting rod from the main shaft. In this
arrangement however, there are several objections, ri; it does not effect a
continuous pressure during the rolling motion, it is irregular, and it also imparts
this said pressure during its return as well as its forward stroke. The object of
this my invention is to overcome these defects, and to simplify the arrangement of
such working parts as follows:-
At the rear end of the reciprocating slide which carries the grippers, I provide
a rotating shaft. This shaft may be driven from the main shaft by means of a
chain band, and pulleys, or it may be driven by means of bevil gearing, or other
suitable manner, generally the former. Upon this rotating shaft, two similar cams
are placed, one upon either side. Also at its centre, a reciprocating cam is provided,
which gives the necessary forward motion to the slide, the same being brought
back by means of a spiral spring,-(or if desired in some cases, a crank pin and
connecting rod may be used). At the front of the slide is formed the bed, upon
which the wires are rolled or rotated, while upon each side is placed the grinding
mills, against which they are rolled for pointing. Upon each side of the slide is
carried a lever, at the front end of each of which is an adjustable shoe or pressure
block, while their two rear ends rest upon and are operated by the two cams
aforesaid.
Thus the action of this part of my invention may be briefly stated thus:-The
rotating cam shaft works the reciprocating slide, and at the same time, during
its forward motion, the front ends of the levers carried thereon, are held down upon
the wires and travel in a parallel line, thus preserving a continuous equal pressure
during their forward stroke. Immediately, or soon after the return stroke
commences, the pressure may be released when the wires remain still, until the
next advance stroke is made.
Dated this 16th day of June 1890.
CHARLES T. POWELL,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Hair Pin Making Machines..
I, HENRY WILLIAM TONKS, of Hockley Hill, Birmingham, in the County of
Warwick, Engineer, do hereby declare the nature of this invention, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention relates to the construction and arrangement of parts constituting

page_text: machinery employed in the manufacture of hair pins, and consists of improvements
in such parts whereby the wires from which the pins are to be made, are held and
rolled, or rotated, during the pointing process.
In machines of this class, the wire to be pointed is carried between two surfaces,
the one (upper) surface, or slide having imparted thereto a reciprocating motion
by means of a connecting rod and a bell crank, which latter in its turn receives its
motion by means of a second connecting rod from the main shaft. In this
arrangement however, there are several objections, viz. :-it does not effect a
continuous pressure during the rolling motion, it is irregular, and it also imparts
this said pressure during its return as well as its forward stroke. The object of
this my invention is to overcome these defects, and to simplify the arrangement of
such working parts as follows:-
At the rear end of the reciprocating slide which carries the grippers, I provide
a rotating shaft. This shaft may be driven from the main shaft by means of a
chain band, and pulleys, or it may be driven by means of bevil gearing, or other
suitable manner, generally the foriner. Upon this rotating shaft two similar cams
are placed, one upon either side. Also at its centre, a reciprocating cam is
provided, which gives the necessary forward motion to the slide, the same being
brought back by means of a spiral spring, (or if desired in some cases, a crank pin
and connecting rod may be used). At the front of the slide is formed the bed,
upon which the wires are rolled or rotated, while upon each side is placed the
grinding mills, against which they are rolled for pointing. Upon each side of the
slide is carried a lever, at the front end of each of which is an adjustable shoe or
pressure block, while their two rear ends rest upon and are operated by the two
cams aforesaid.
Thus the action of this part of my invention may be briefly stated thus:-The
rotating cam shaft works the reciprocating slide, and at the same time, during its
forward motion, the front ends of the levers carried thereon, are held down upon
the wires and travel in a parallel line, thus preserving a continuous equal pressure
during their forward stroke. Immediately, or soon after the return stroke
commences, the pressure is released when the wires remain still, until the next
advance stroke is made.
In order to more clearly explain this my invention I have hereunto appended
illustrative sheets of drawings upon which are figured views, whose parts have also
reference numbers, similar numbers referring throughout the several views to the
same thing or part.
In illustrating this my invention I have only shown such parts of the machine
which embrace or are connected with my said invention, in which :-
Fig. 1, is a side view in elevation of the upper or main portion of the machine,
showing the arrangement and operation of the reciprocating slide, rotating shaft,
parallel pressure levers &c.
Fig. 2, is a plan view of Fig. 1.
Fig. 3, is a front end view of Fig. 1.
Fig. 4, is a part end view on a reduced scale, from the rear end of the machine
showing the arrangement of the driving gear.
Figs. 5 & 6; are detached views in detail of the cams used, and shown in
Figs. 1, 2 & 3.
1, is the frame of the machine upon which the various parts are built or carried.
2, is the reciprocating slide, which is carried in suitable guides upon the frame 1.
Motion is imparted to this slide by means of the cam 3, which is keyed to the
rotating shaft 4. This shaft 4, is driven from the main driving shaft (see Fig. 4,)
by means of a half crossed chain belt 5, from pulley 6, to pulley 7.
Again. Upon the slide 2, 1 form a snug 8, to carry the joint pin 9, upon each
end of which are carried the pressure levers 10, 10. At the front end of these
levers, provide an adjustable pressure shoe 11, which, by means of the
pins 12, 12, & 13, may be made perfectly parallel to the steel bed 14, upon which
the hair pin 15, is rolled. The other end of these two levers rest upon and are

page_text: actuated by the cams 16, 16, (see detail Fig. 6), which have a concentric surface
from 17, to 18; which said surface presses upward against the levers during
the forward motion of the slide 2, and pressure shoes 11, 11, that is, during
the rolling action of the hair pin. Immediately upon the return stroke of the
slide &c., the reduced part 19, of the cams 16, 16, permit of the raising of the
shoes 11, 11, during their return stroke.
The return stroke of the slide 2, may be effected as follows:-A rod 20, is
screwed into the end of the frame 1. Secured to the underside of the slide 2, is
a downward projecting piece 21, which slides upon the forward end of the fixed
rod 20. Between this piece 21, and the end of the frame, and sleeved upon the
rod 20, is the spiral spring 22, whose tendency is thereby always to expand and
so keep the slide always against the nose of the cam 3, or in other words effect
its return stroke.
23, 23, are the grinding mills carried upon spindles 24, 24, and driven by
pulleys 25, 25, which are in their turn driven from the main shaft (see Fig. 4) by
bands 26 & 27.
These spindles are further carried in the adjustable brackets 28, 28, so that
they may be drawn towards or extended from each other to accommodate the
various lengths of hair pins to be made.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a hair pin making machine, the combination of the frame 1, bed block 14,
grinding mills 23, 23, with the slide 2, carrying pressure levers 10, 10, having
adjustable shoes 11, 11, and operated by the cams 16, substantially as described
and shown and for the purposes specified.
2. In a hair pin making machine, the combination of the frame 1, slide 2, bed 14,
levers 10, 10, and mills 23, 23, with the rotating shaft 4, carrying cam 3,
cams 16, 16, and driving pulley 7, constructed and operating substantially as
described and shown.
Dated this 16th day of March 1891.
CHARLES T. POWELL,
Applicant's Agent.