Improvements in Hinge or Pivot Joints.
Year: 1892

page_text: Date of Application, 6th May, 1892
Complete Specification Left, 24th Oct., 1892-Accepted, 6th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Hinge or Pivot Joints.
We, EDWARD SMITH HIGGINS, of 6 Thorburn Square, in the County of
Surrey, Engineer, and HENRY CHARLES JENKINS, of 99 Iverson Road, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows:-
The subject of this invention relates to joints which are particularly applicable
for use in type-writers especially with the type-arms or levers but which may
however be otherwise applied where a joint of the nature in question is required.
What is particularly needed in a joint of this description is in the first place that it
shall only allow of movement of rotation in a plane perpendicular to the axis of
the screw or spindle upon which it works, and secondly that it shall be capable of
being tightened up and resisting continuous wear. These objects we attain in the
following manner and we will describe the invention as applied to the type-lever of
a type-writing machine.
U Upon any suitable supporting part of the frame-work is a jaw either formed in
part with such framework or support or it may be an independent jaw secured to
any required support. This jaw consists of two jaws bored out to a considerably
larger diameter than that of the pin or screw which is to form the working pivot
of the joint; one side is bored out with a parallel hole, the hole in the other side
being of smaller diameter and checked to receive a washer which fits upon it.
Between the jaws the end of the type lever fits with a comfortable working fit,
this portion being conically recessed on one side and provided on each side with a
collar extending about half-way round the hole.
Two washers are arranged to fit one upon each of the jaws; one of them being
constructed as follows,-This washer is provided with a cylindrical extension to
fit into the check in the one side of the jaw and it is also provided with a collar
or flange so arranged that when the washer is in place it fits around the half
collar upon the type-lever; a portion of the flange of this washer may be cut
away so as to allow of the ends of the part flange of the lever passing out of the
annular groove provided for it in the washer between the flange and the cylindrical
extension, and thus clearing out at every movement any dust or dirt which may
have collected in the groove or preventing such collection.
The second washer is substantially the same as the first washer but the cylindrical
projection is longer and is coned to fit the conical recess in the type-lever through
which it may pass and meet the washer on the opposite side so that when screwed
up the washers may not be jammed and prevent the lever from working. The end
of the second washer beyond the cone may be so made as to have but a small
face engaging with the first washer so that in case of very prolonged wear, it may
be screwed tightly against the first washer and yielding allow the two washers to
be moved fractionally nearer to each other. This second washer has a hole
through it adapted to the pin or spindle which may either be screwed into it or
may pass through it and have a nut upon it; this washer in other respects is
similar to the one first described.
When the parts above described are put together it will be found that a joint
having all the necessary freedom of play but without shake in any direction is
formed and although modifications may be made without departing from the
spirit of the invention, the joint as above described is found to provide the
practical solution of this joint question. As an instance of the modification

page_text: the cone on the second washer might be formed as a sleeve instead of as a solid
portion of the washer.
Dated this 6th day of May 1842
W. P. THOMPSON & BOULT,
Agents for the Applicants.
.1
•
COMPLETE SPECIFICATION.
Improvements in Hinge or Pivot Joints.
WC, EDWARD SMITH HIGGINS, of 6 Thorburn Square, in the County of
Surrey, Engineer, and HENRY CHARLES JENKINS, of 99 Iverson Road, in the
County of Middlesex, 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 joints which are particularly applicable for use in type-
writers especially with the type-arms or levers but which may however be otherwise
applied where a hinge or joint of the nature in question is required. What is
particularly needed in a joint of this description is in the first place that it shall
only allow of movement of rotation in a plane perpendicular to the axis of the screw
or spindle upon which it works, and secondly, that it shall be capable of being
tightened up and resisting continuous wear.
In the accompanying drawings we have shown the invention as applied to a type-
lever of a type-writing machine;
Figure being a side elevation of the complete joint and type-lever,
Figure 2 a plan of the jaw or bracket.
Figures 3 and 4 elevations showing opposite sides of the bracket,
Figure 5 a transverse section of the complete joint and a portion of the type-
lever.
Figures 6 and 7 are respectively an elevation of the outer face and a section of
one of the washers.
Figure 8 is a transverse section on line 8---8 of Fig. 2.
Figure 9 is a section through the lower part of the type-lever, and
Figures 10 and 11 are respectively a section and an elevation of the inner face
of the other washer.
Figure 12 is a section corresponding to Fig. 10 of a modification of part of the
joint.
1
Like letters indicate like parts throughout the drawings.
:
A is the jaw or bracket which is secured down to the framework of the type-
writing machine by a screw passing through the hole a or in any other convenient
manner. a a² are the two jaws of the bracket A. between which is left a space a³.
The jaw a has a cylindrical hole a' and the jaw a' has a hole a which is smaller
at the inner than the outer side of the jaw so as to form a shoulder a. The
width across the jaws a¹ a³ is preferably less than the width across the back end
of the bracket A as shown in Fig. 2, so that when the joint is complete with the
washers B and C fitted thereto it may be of practically uniform width from back
to front. The washer B for fitting on to the jaw a¹ is provided on its inner face
with a short cylindrical projection 6 which fits into the larger part of the opening a
and rests against the shoulder a. The central opening 6 is for the passage of the
screw D the head d' of which fits into the recess 6 and bears against the shoulder 6*
of the washer B, but there is no screw-thread in the opening b' so that the screw
may turn within the washer B. The washer B at its internal face is provided
with the segmental rim 64, the gap 65 between the ends 66 of the rim 64 being of
such size that when the washer is fitted on the bracket A the ends of the said
rim 6 will fit against the faces or shoulders a' as of the bracket A. The washer C
is also formed with a rim band gap and is moreover provided with a central
projection c-which at the part c' is cylindrical for fitting accurately into the hole at

page_text: of bracket A, at the part conical for fitting into the conical hole e of the type-
lever E, and at the parte cylindrical for fitting into the smaller part of the hole a
of bracket A all as shown clearly in Figure 5. If desired the tapered part c² may
be continued to the end of c the hole a being in that case tapered to match. The
central hole c¹ of washer C is screw-threaded for receiving the screwed portion.d.
of the screw D.
"
The type-lever E on each side is formed with a part or segmental collar e¹ the
external curve or diameter of which corresponds with the internal curve or diameter
of the washer rim and the internal curve or diameter of which corresponds with
the external curve or diameter of the jaws a¹ a² of the bracket A. The term
" diameter wherever used in this Specification in reference to the segmental
collar e' is employed figuratively because it applies only to the circle of which the
segment el forms a part. The position of the parts of the joint when fitted together
is shown in Figs. 1 and 5 the lower end of the type-lever E fitting into the recess a³
of the bracket A and the internal faces of the segmental collars e resting against.
the external surface of the jaws a¹ a. If desired the internal surface of el or
external surface of a¹ a² may be formed with one or more recesses for reducing
friction and retaining lubricant, and the same may be done with the external surface
of e and internal surface of 6. The washer C is applied to one side of the
bracket A its rim b' encircling the appropriate segmental collar e' which consequently
works between two bearing surfaces viz. the outer surface of the jaw a' and the
inner surface of the rim. . The projection c of washer C passes through the
opening a¹ of bracket A, the conical aperture e of type-lever E, and into the smaller
part of the opening a³ in the jaw a'. The washer B applied to the other side of
the bracket A in a similar manner embraces the appropriate segmental collar e' of
type-lever E, its projection & fitting into the larger part of the opening a of bracket
jaw a. The screw D engages with the thread of hole c and its head d¹ is.
received in the recess 62. The adjacent faces of the projection and that at the
end of the projection c are preferably brought into contact by means of the screw D.
so that the joint cannot be jammed tight by turning the screw D to an unnecessary
extent. Should it however at any time be necessary to compensate for the wear of
the joint the end of the projection c may be rubbed on an oil-stone or. otherwise.
dealt with to decrease its length to a fractional extent.
Instead of the conical part 2 of the projection c being formed in part with the
washer C it may, as shown in Fig. 12, be formed on a sleeve fitted preferably
tightly upon the projection c, which in this instance will be cylindrical and of the
diameter of c throughout. This arrangement enables a worn sleeve to be replaced
by another without necessitating the substitution of a complete washer C and
projection c as would be necessary in the case of the projection c of Figures 5, 10
aud 11, becoming worn to a corresponding extent.
When the parts before described are put together it will be found that a joint
specially applicable to type-levers of type-writing machines and also applicable to
various other machines and apparatus and having all the necessary freedom of play
but without shake in any direction is formed and although modifications may be
made without departing from the spirit of the invention the joint as above described
is found to provide a practical solution of this joint question.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is,
1. In a hinge or joint such as described the combination with the two members
to be jointed together of a segmental collar such as e¹ and jaw such as a¹ or a³ the
internal curve or diameter of e¹ corresponding with the external curve or diameter
of a' or a substantially as described and illustrated in the accompanying drawings.
2. In a hinge or joint such as described the combination with the two members
to be jointed together of a segmental collar such as e and washer such as B or C
having a rim such as 6 whose internal curve or diameter corresponds with the

page_text: external curve or diameter of e¹ substantially as described and illustrated in the
accompanying drawings.
3. In a hinge or joint such as described the combination with the two members.
to be jointed together and a segmental collar jaw and washers such as e¹ a¹ or a
and B and C of a partly cylindrical and partly conical projection such as c
substantially as described and illustrated in the accompanying drawings.
4. In a hinge or joint such as described the combination with the two members
to be jointed together and a segmental collar jaw and washers such as ea¹ or a³
and B and C 6 of a cylindrical projection formed in part with one of the washers
and a partly conical and partly cylindrical sleeve such as c'cfitting thereon
substantially as described and illustrated in the accompanying drawings.
5. In a joint such as described the combination with one of the members to be
jointed having a conical hole such as e of another member having a recess such as a³
and holes such as a* a substantially as described and illustrated in the accompanying
drawings.
6. In a joint such as described the combination with one of the members to be
jointed of a washer such as B or C having a rim such as 6* extending partly around
it and the ends of which abut against shoulders on the member to which it is
applied substantially as described and illustrated in the accompanying drawings.
7. In a joint such as described the combination with one member having the
parts e e¹ and fitting between the jaws of the other member of the washers B Č one
of which has parts c¹ c³ ³ the whole fixed together by a single screw.
8. The combination and arrangement of parts constituting the complete joint
substantially as described and illustrated in the accompanying drawings.
Dated this 22nd day of October 1002
E. S. HIGGINS.
HENRY C. JENKINS.
W. P. Thompson & Boult,
Agents for the Applicants.
E. S. HIGGINS.
HENRY C. JENKINS.
W. P. Thompson & Boult,
Agents for the Applicants.