An Improved Machine for Making Wire Lath-supports for Venetian Blinds and the like.
Year: 1899

page_text: Date of Application, 6th Sept., 1899-Accepted, 30th Dec., 1899
[Communicated from abroad by MESSRS. KRAFFT & SCHÜLL, of the Metal-Chain
Works, Roerdammweg 10, Düren, Rhineland, in the German Empire,
Manufacturers.]
An Improved Machine for Making Wire Lath-supports for Venetian
Blinds and the like.
I, JOHN THOMAS KNOWLES, Trade Marks Agent, of the firm of D. Young & Co.,
of 11 & 12, Southampton Buildings, London, W.C., do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:
This invention relates to a machine for making wire lath-supports for Venetian
blinds and the like, which supports serve not only for surrounding the laths
or boards of the blinds, but also for receiving the pulling-up cord or band, which
they enclose.
The said lath-supports, which are made in the improved machine and which
could heretofore only be made by hand, each consist of a wire provided with an
eye at each end and with an eye in the middle. The lath-supports are bent
outwards in the middle on both sides to enclose the pulling up cord or band. The
eyes serve for connecting the lath-supports with the blind chains by means of
rings, whilst the longitudinal opening formed by the bending of the wire serves
for receiving the laths or boards.
In the accompanying drawings there is shown the machine in which lath-
supports of this kind can be made; in this drawing,
Figure 1 is a plan of the machine, and
Figure 2 is a section on the line AB, Figure 1.
Figures 3 to 6 show the various forms which the wire successively assumes
in the machine.
Figure 7 illustrates the machine in end elevation, and
Figure 8 in side elevation.
A carriage or slide 1, which is moved by means of a cam 2, and the jaw or
nipper 3 of which is closed by a cam 4 acting through a lever 5, brings the wire
into the machine, beneath the bending mandrels 6, 7 and 8. A slide 9, which is
actuated by a grooved cam disc 36, acting through a lever 37, cuts off the wire by
means of knives 11, in order to give the wire the form shown in Figure 3.
Rotary bending tools 12 and 13, by means of a cam 14 and rack-bars 15, 16,
Figure 8, are caused to make a three-quarter turn, whereby the wire is bent
round the mandrels 6 and 8 and is given the form shown in Figure 4.
Dies 20, 21, 22, 23, Figure 1, are now moved inward or toward the middle of
the machine by means of cams or tappets I mounted on a spur-wheel 24 and
a smooth wheel 25 respectively, the wire thereby receiving the form shown in
Figure 5. The movement of the die 21 is here effected through a lever 38. The
dies are drawn back by hooked or cam-pieces z mounted on the spur-wheel 24
and wheel 25. The wire-holder 17, which is moved up and down by means of a
cam E, serves to hold fast the wire at one end, whilst the bending tool 27,

page_text: Figure 1, turning about its axis, comes into operation in order to provide the
wire with an eye at the middle whereby it receives the final form shown in
Figure 6.
The bending tool 27 is turned by a cam 28 acting through a rack-bar 29 and a
pinion 30, Figures 7 and 8. It receives its lateral motion by a cam 18 and
lever 19, Figure 1.
:
The mandrel 7 is actuated through a lever 35 by a cam 34, Figure 1. The two
gear-wheels 24 and 40 have equal numbers of teeth in order to transmit the motion
of the lower shaft at the same rate to the upper shaft.
On the carriage or slide 1, there is a sleeve, round which is arranged a
spring 31. The object of this spring is to raise a steel pin 32 mounted in the
sleeve during the return movement of the carriage or slide. During the moving
in of the wire, a set-screw 33, actuated by the lever 5, presses the wire firmly
on to the pin. 32, so that the wire is clamped fast.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, as commuicated to
me by my foreign correspondents, I declare that what I claim is: --
A machine for the manufacture of wire lath-supports for Venetian blinds and
the like, said machine being provided with bending mandrels and slide-bars for
making the end eyes and the middle eye, and with dies which, before the middle
eye is made, bend the wire out laterally in such a manner that the finished lath-
support has an opening for the passage therethrough of the pulling up cord or
band, substantially as described.
Dated this 6th day of September 1899
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.
Agents for the Applicant.