An Improvement in Bows for use in Drilling and Turning.
Year: 1890

page_text: Date of Application, 23rd July, 1890
Complete Specification Left, 12th Mar., 1891-Accepted, 18th Apr., 1891
PROVISIONAL SPECIFICATION.
An Improvement in Bows for use in Drilling and Turning.
I, ISAAC READ, of 4, Longstone Road, Eastbourne, in the County of Sussex,.
Watchinaker and Jeweller, do hereby declare the nature of this invention to be as
follows:-
My invention relates to an improvement in bows such as are used by watchmakers.
jewellers and others in drilling and turning watch and other work and my invention
has for its object to provide a more efficient and ready means of fastening the hair
or gut to the ends of the bow whereby the tension may be quickly adjusted to suit
the requirements of the work and the objections to looping and knotting the hair or
gut are avoided.
The invention consists in the combination of a solid and a tubular part fitting the
one in the other with capability of longitudinal sliding motion the one with regard
to the other and each having a transverse hole or a lateral slit or notch for the hair
or gut and of a spring acting on the sliding part and tending to put the holes or
notches in the two parts out of register so as to cause the hair or gut previously
threaded or otherwise inserted therein to be firmly nipped between the two parts.
It further comprises means of limiting the motion of the sliding part and of
readily operating it so as to make the holes or notches in the two parts coincide for
the purpose of inserting the hair or gut therein.
In the preferred form the tubular part or socket is affixed to the end of the bow
and contains the sliding part or plunger and likewise the spring which tends to
force the plunger outwards, the motion being limited by a lateral stud projecting
through a slot in the socket and by which the plunger may be readily drawn inwards
to make the holes or notches coincide.
Or the plunger may be forced inwards by pressure applied to its outer end
which is more convenient when a lateral slit or notch is used instead of a
diametrical hole.
The fastener at the heel end of the bow would also be provided with a reel on
which the surplus hair or gut may be wound.
Dated this 02nd dow of Tul 1800
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
An Improvement in Bows for use in Drilling and Turning.
I, ISAAC READ, of 4, Longstone Road, Eastbourne, in the County of Sussex,
Watchmaker and Jeweller, 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:—
My invention relates to an improvement in bows such as are used by watch-
makers jewellers and others in drilling and turning watch and other work and
my invention has for its object to provide a more efficient and ready means of
fastening the hair gut or other filament to the ends of the bow whereby the tension
may be quickly adjusted to suit the requirements of the work and the objections
to looping and knotting the hair or gut are avoided.
In the accompanying drawings, in all the figures of which the same part is
indicated by like letters of reference,

page_text: Figure 1 is a perspective view of a complete bow made in accordance with my
invention.
Figure 2 represents enlarged views of the handle end showing the two extreme
positions of the hair or gut gripping device.
Figure 3 represents enlarged views of the fore end of the bow showing the two
extreme positions of the filament gripping device adopted at that end and
Figure 4 is a perspective view of the reel formed at the handle end of the bow
showing the manner in which the end of the filament is first secured and then
guided to the gripping device.
The invention consists in the combination of a solid part A and a tubular part B
fitting the one in the other with capability of longitudinal sliding motion the one
with regard to the other and each having a transverse hole C or lateral slit or
notch D for the hair gut or other filament E and of a spring F acting on the solid
sliding part A and tending to put the holes or slits in the two parts out of register
so as to cause the filament previously threaded or otherwise inserted therein to be
firmly nipped between the two parts.
It further comprises means of limiting the motion of the sliding part A and of
readily operating it so as to make the holes or slits in the two parts coincide for
the purpose of inserting the filament therein.
In the preferred form the tubular part or socket B is affixed to the end of
the bow and contains the sliding solid part or plunger A and likewise the
spring F which tends to force the plunger outwards the motion being limited
by a lateral stud G projecting through a slot H in the tubular part B and by which
the plunger may be readily drawn inwards to make the holes or slits coincide.
Or the plunger may be forced inwards by pressure applied to its outer end
which is more convenient when a lateral slit or notch is used instead of a
diametrical hole.
The fastener at the handle end of the bow is also provided with a reel J on
which the surplus filament may be wound. This reel is drilled through its
forward flange as shown at K at such an angle that the end L of the fila-
ment E, previously threaded from the inside of the flange and then brought into
position for winding on the reel, does not slip. It is also slitted in its rear flange
to lead the filament into the slit or notch D to be held by the gripping
mechanisin hereinbefore described which serves especially for securing the filament
when the store from the reel has been exhausted thus securing the filament in
the same way at both ends of the bow when the last length is in use.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a bow for drilling and turning, fastener ends consisting of a tubular
part B, a solid part A slotted or perforated, a spring F and a stud G to limit
the movement of the solid part A for securing and readily altering the length of
the hair, gut, or other filament employed for the bow substantially as described
and shown in the accompanying drawings.
2. In a bow for drilling and turning the formation of a reel at the handle end
drilled to secure the end of the filament previous to winding on the reel and slitted
to guide the filament into the gripping mechanism substantially as described and
shown in the accompanying drawings.
Dated this 10th day of March 1001
AYRTON & THOMAS,
Patent Agents.