An Improvement in Cross Bridges or Bars Used in connection with the Hand-hole and like' Covers of Steam Boilers, Hot Water Circulating Boilers, Tanks, Kiers, and the like.
Year: 1898

page_text: Date of Application, 8th Nov., 1898
Complete Specification Left, 8th Aug., 1899-Accepted, 30th Sept., 1899
An Improvement in Cross Bridges or Bars Used in connection with
the Hand-hole and like' Covers of Steam Boilers, Hot Water
Circulating Boilers, Tanks, Kiers, and the like.
I, ALICE ANN MILLS, of 55, Barton Road, Stretford, near Manchester, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the cross bridges or bars by means of which caps
or covers are secured, for closing hand holes on boilers, tanks, kiers, and the like,
the objects of the invention being to economize the manufacture thereof, and
to make them stronger than heretofore.
Such cross bridges or bars are provided with a central stem or shank which
is ordinarily made in a separate piece and rivetted into its place in the cross
bridge or bar which is made with a central boss for that purpose, the free end
of such stem or shank being chased with a screw thread to receive a nut for
securing the same.
According to my invention I form the bridge and its stem in one piece and
at one operation from a bloom of mild steel or wrought iron by stamping it
between dies, and I afterwards form the screw thread on the free end of the
stem or shank to receive the nut.
By these means the formation or construction of such cross bars or bridges
is considerably economized and being all in one piece of mild steel or wrought
iron, without rivetting, they will be found to be more durable as there is no
liability of the stem or shank becoming loose, or of the central boss becoming
broken.
An Improvement in Cross Bridges or Bars Used in connection with
the Hand-hole and like Covers of Steam Boilers, Hot Water
Circulating Boilers, Tanks, Kiers, and the like.
I, ALICE ANN MILLS, of 55, Barton Road, Stretford, near Manchester, in the
County of Lancaster, 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 cross bridges or bars by means of which caps
or covers are secured for closing hand holes on boilers, tanks, kiers and the like

page_text: =
the objects of the invention being to economize the manufacture thereof and
to make them stronger than heretofore.
Such cross bridges or bars are provided with a central stem, or shank which
is ordinarily made in a separate piece and rivetted into its place in the cross
bridge or bar which is made with a central boss for that purpose the free end
of such stem or shank being chased with a screw thread to receive a nut for
securing the same.
According to my invention I form the bridge and its stem in one piece and
at one operation from a bloom of mild steel or wrought iron by stamping it
between dies, and I afterwards form the screw thread on the free end of the
stem or shank to receive the nut.
.
By these means the formation or construction of such cross bars or bridges
is considerably economized and being all in one piece of mild steel or wrought
iron, without rivitting, they will be found to be more durable as there is no
liability of the stem or shank becoming loose, or of the central boss becoming
broken.
In order that my invention may be more readily understood and carried into
practice I have appended hereunto a sheet of drawings upon which I have illus-
trated two examples of carrying my invention into effect.
Figure 1 is a side elevation of a cross bridge.
Figure 2 is a plan of same.
Figure 3 is a side elevation of another form of bridge.
As before explained the shank (A) is ordinarily made separate from the cross
bridge (B) and rivetted thereto, by my invention I form the shank (A) and the
body part all in one piece at one operation from a bloom of mild steel or wrought
iron by stamping it between dies or other suitable means. This not only
saves a great deal of time in the manufacture of such bridges, but such bridges
may be made in a lighter form such for instance as Fig. 1 with curved arms (E)
or as in Fig. 3 with square arms (D) the exterior design or shape could also be
altered to suit any taste without in any way deteriorating the strength of the
bridge. The upper portion of the stem (A) has a screw thread cut upon it for
a nut to be screwed upon when the bridge is fitted into its position where ever
it is required.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what
I claim is: -
The improvement in cross bridges or bars used in connection with the hand
hole and like covers of range and other such hot water circulating boilers, con-
sisting of making such cross bridges with the stem or shank and the body part
all in one piece substantially as herein set forth.
Datad
1 A
1000