Improvements in or Additions to Hair Clippers.
Year: 1889

page_text: Date of Application, 2nd Sept., 1889-Accepted, 5th Oct., 1889
COMPLETE SPECIFICATION.
Improvements in or Additions to Hair Clippers.
We, WILLIAM BURMAN and WILLIAM HAWKES BURMAN trading as Burman and
Sons of Ryland Road in the City of Birmingham, Clipper Manufacturers, 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 hair clippers for various purposes, but particularly to
instruments known as toilet clippers; and the object of our said invention, is to
increase, or decrease, differentially, the power or force of the spring, which automa-
tically opens-out the levers, or handles, after the performance of each cut.
Disposed on the respective insides of the operating levers, a flat spring, and a
variable rocking fulcruin, are disposed. The free end of the said spring, oscillates
upon one or other of a number of projections on the fulcrum; and by changing the
end of the springs, to one or other of the said projections the power of the spring is
lessened or enhanced.
Figure 1 of the accompanying drawings, represents in front elevation, a toilet
clipper, provided with spring tensioning means, arranged according to our invention-
The said figure shows the levers fully expanded, or opened out, and with the free
end of opening out spring, resting upon the larger tooth or projection of the fulcrum
arm.
Figure 2 shows a like view as figure 1 but with the end of the spring, resting itself
upon the lesser tooth projection.
a is bottom and fixed cutter plate, 6 is the upper and reciprocating cutter, worked
from the lever c, whose inside part is provided with, a flat opening-out spring d,
attached at its outer end to the said lever c, and with its other and free end, taking
its bearing upon one or other of two projections e²e of a fulcrum rocking arm e,
jointed at e, to a bracket 2, directed outwardly from the inside edge of the other
lever f. The inner end of this last named lever forms a covering cap³, and through
which cap and the cutters as aforesaid, a central securing together-pin passes.
The extreme tips of the projections e², e, take into a depression or sunken part d
at the free end of the spring d; and by means of which, the shifting of the prong's
position is prevented.
Instead of fulcrum arm having two projections, it may have three, or other number,
as may be desired.
Figure 3 shows a modification of the fulcrum rocking arms. The free end of the
spring in this case instead of resting upon a projection, as in figures 1 and 2, now
takes within a notch or depression, made in the said arm; it will be seen that the
cutter plates and cap are partly broken away-a is the fixed cutter plate, 6 the upper
cutter, worked from the lever c, flat spring d with its free end d², slightly hooked,
and taking into one or other of two, or a number of notches e², e³, of a fulcrum arm e,
jointed at e, to a bracket e³, on the lever c.
The notches or depressions are arranged at different distances from the centre of
the joint e, so as to give varying strengths to the opening-out spring d, as may be
desired.
The other lever carrying the spring, is marked f.
Figure 4 represents another form of our invention. In this said arrangement, the
differential tension or strength of the spring, is acquired by a screw pin, acting upon
he attachment or shank end of the spring-a is the bottom cutter plate, b the upper
utter, c the left hand lever, with fulcrum snug c², for free end of spring to bear
gainst. fis the right hand lever, carrying spring d, and attached at d³, to the lower
nd of the said lever f.

page_text: g is a screw pin, working through the handle, and with its end g², taking its
bearing upon the rear part of the spring, near its attachment to the lever; so that by
adjusting the position of the screw, so as to bring its end g², more or less beyond
the inside face of the lever f, the springs tension d, is increased or decreased,
according to the forcing outwards of it.
Having now particularly described and ascertained the nature of our said
invention, and in what manuer the same is to be performed, we declare that what
we claim is :-
First-Providing fulcrum-rocking arms, with two or more projections, for
obtaining differential pressures of the opening-out spring, of a lever clipping machine,
and which opening-out spring's free end, is indented or sunken, to take upon the said
projections, substantially as described and set forth in figures 1 and 2.
Secondly Providing fulcrum rocking arms, with two or more differentially
arranged notches or depressions, wherein the hooked free end of the opening-out
spring, of a lever clipping machine, takes, substantially as and for the purpose as set
forth in figure 3.
Thirdly -Increasing or decreasing the power of opening-out springs, of lever
clipping machines, by a screw pin, taking through the lever carrying the spring, and
coming against the said spring, above its point of attachment, substantially as
described and set forth in figure 4.
Dated this 30th day of August 1889
WILLIAM BURMAN.
WILLIAM HAWKES BURMAN.
By Henry Skerrett, Agent for Applicants.