Improvements in the Manufacture of Rack-pulley-frames.
Year: 1891

page_text: Date of Application, 17th June, 1891
Complete Specification Left, 17th Mar., 1892-Accepted, 7th May, 1892
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Rack-pulley-frames.
I TOM HOLLAND LAWTON of 102 Grange Road Small Heath in the County of
Warwick Brass Founder do hereby declare the nature of this invention to be as
follows:-
This invention consists in the improvements in the process of manufacturing
rack-pulley-frames hereinafter set forth.
A rack-pulley-frame consists essentially of a foundation plate from which usually
projects two uprights or short brackets between which the pulley and its moving
mechanism is usually secured, such rack-pulley-frames are usually made out of cast
mettal, that is to say, are usually cast in one piece.
My invention consists in making a rack-pulley-frame out of sheet metal in the
following manner.
By the first modification I provide a strip of metal of suitable length and width
to form the bottom plate and also both upwright projections-or vertical brackets.
I stamp pierce or otherwise cut and form the strip of metal with the required
horizontal internal piercings and external configuration producing a piece at each
end of the strip of the size and shape suitable to utilize as upright projections or
brackets, I also form two slots or piercings, one at each end of bottom-plate at a
suitable distance from ends of said plate; I next by means of suitable tools bend
over one end and tuck or pass the bracket shaped part (formed at extreme end)
through the slit or slot provided to receive it, the part so pushed through pro-
jecting at right angles to the foundation plate, and afterwards secure the two
horizontal surfaces together by means of a ilet which would be expanded over a
countersunk edges formed on the external surfaces of each layer, this first modifica-
tion would be suitable for use when the finished rack-frame was formed with square
ends the square ends affording facilaties for the sheet metal to be doubled over but
when the end of finished-rack-frame terminated in a point, of course the folded over
edge could not remain (it would have been removed by shaping) therefore by a
Second modification of my invention I form the foundation-plate of the usual
finished length and provide the slits or slots "to receive the bracket parts' at
suitable distances from the ends of such foundation plate.
"
I next provide seperate L shaped pieces one arm of each L shaped piece being
of a proper shape to utilize as a vertical projection or bracket and the other arm
of the shaped piece being of any ornamental or required shape to match or
correspond with the end of foundation plate I then pass the bracket arm of
L shaped piece through the slot provided in foundation plate to receive it until
the other arm rests flat against the underside of foundation plate, where it would
be secured to and amalgamated with the end of foundation plate by means of the
ilet, as hereinbefore described in relation to first modification."
In some cases I prefer to shape the ends of foundation plate after the two parts
have been ileted together, thus by one operation cutting the amalgamated parts.
1 proceed in a precisely similar manner "to that hereinbefore described
respecting one end to form the other bracket end of rack-pulley-frame, thus
producing a frame with two projections one at each end.
Rack-pulley-frames made in the manner hereinbefore described are superior to
cast frames and yet they can be produced at a lower cost than cast frames.
Dated this 15th day of June 1891.
ALFRED WILLIAM TURNER,
Cobden Buildings, Corporation Street, Birmingham,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Rack-pulley-frames.
I, TOM HOLLAND LAWTON of 102 Grange Road, Small Heath, in the County
of Warwick, Brass-founder do hereby declare the nature of this invention ard in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention consists in the improvements in the process of manufacturing
rack-pulley frames hereinafter set forth.
A rack-pulley-frame consists essentially of a foundation plate from which usually
projects two uprights or short brackets between which the pulley and its moving
mechanism is usually secured, such rack-pulley-frames are usually made out of cast
metal, that is to say are usually cast in one piece.
My invention consists in making a rack-pulley-frame out of sheet metal in the
following manner.
By the first modification I provide a strip of metal of suitable length and width
to form the bottom plate and also both upright projections or vertical brackets.
I stamp pierce or otherwise cut and form the strip of metal with the required
horizontal internal piercings and external, configuration producing a piece at each
end of the strip of the size and shape suitable to utilize as upright projections or
brackets, I also form two slots or piercings one at each end of bottom plate at a
suitable distance from ends of said plate; I next by means of suitable tools bend
over one end and tuck or pass the bracket shaped part (formed at extreme end)
through the slit or slot provided to receive it, the part so pushed through
projecting at right angles to the foundation plate and afterwards secure the two
horizontal surfaces together by means of an eyelet which would be expanded over
a countersink edge formed on the external surface of each layer, this first modifi-
cation would be suitable for use when the finished rack-frame was formed with a
square end, the square end affording facilaties for the sheet metal to be doubled
over but when the end of finished rack-frame terminated in a point, of course
the folded over edge could not remain (it would have been removed by shaping)
therefore by a
Second modification of my invention I form the foundation plate of the usual
finished length and provide the slits or slots to receive the bracket parts at
suitable distances from the ends of such foundation-plate.
I next provide separate L shaped pieces one arm of each shaped piece being
of a proper shape to utilize as a vertical projection or bracket and the other arm
of the shaped piece being of any ornamental or required shape to match or
correspond with the end of foundation plate I then pass the bracket arm of
Lshaped piece through the slot provided in foundation plate to receive it until the
other arm rests flat against the underside of foundation plate, where it would be
secured to and amalgamated with the end of foundation plate by means of the eyelet
as hereinbefore described in relation to first modification.
In some cases I prefer to shape the ends of foundation plate after the two
parts have been eyeleted together thus by one operation cutting the amalgamated
parts.
I proceed in a precisely similar manner to that hereinbefore described respecting
one end to form the other bracket end of rack-pulley-frame thus producing a frame
with 2 projections one at each end.
Rack-pulley-frames made in the manner hereinbefore described are superior to
cast frames and yet they can be produced at a lower cost than cast frames.
I will now proceed to describe with reference to the accompanying drawings the
manner in. which my invention is constructed and used.
Figure 1 represents the strip of first modification suitable to form the bottom
plate and upright projection.
Figure 2 represents a plan of Figure 1.

page_text: Figure 3 represents the second modification consisting of foundation plate and
two brackets.
Figure 4 represents a plan of Figure 3.
Figure 5 represents the completed rack-pulley-frame and connections.
Figure 6 represents the strip of first modification with end tucked through the
slot to form the side bracket.
Figure 7 represents a plan of Figure 6.
Similar letters refer to similar parts throughout the several views.
In carrying out the first modification of my invention I provide a strip of metal
of suitable length and width to form the bottom plate a and also both upright
projections or brackets; Figure 1 shews the left hand portion of such strip of
metal.
I stamp, pierce, or otherwise cut and form the strip of metal with the required
piercings and external contour, producing a part cat each end, of the size and
shape suitable to utilize as upright projections or brackets b, I also form the two
slots or piercings d and e at a suitable distance from the ends of said plate; I next
by means of suitable tools, bend over and tuck or pass the end through the slit or
slot e provided to receive it, the part so pushed through projecting at right angles
to the foundation plate a, the two horizontal surfaces are then secured together by
means of an eyelet expanded over the countersunk holes formed in each-layer as
represented at g h Figure 7, this first modification would be suitable for use when
the finished rack-frame was formed with a square end as shewn at Figure 7, the
square end affording facilities for the sheet metal to be doubled over but when the
end of finished rack frame is required to terminate in a point as shewn at k
Figure 3 the folded over edge would be removed by suitable tools.
By the second modification of my invention I form the foundation plate a of the
usual finished length and provide the slits or slots m n to receive the bracket parts
as illustrated at Figure 3.
I next provide separate brackets 61 62 one arm of each bracket being of a proper
shape to utilize as a vertical projection the other arm being of any other
ornamental or required shape to match or correspond with the end of foundation
plate I then pass the bracket arm & through the slot m provided in foundation
plate until the other arm ³ rests flat against the underside of foundation plate
where it would be secured to and amalgamated with the end of foundation plate
by means of the eyelet f as hereinbefore described in relation to 'first
modification.
In some cases I prefer to form the ends of foundation plate and the cheek 63 of
bracket in a rough unfinished state and to afterwards cut or shape the amalga-
mated parts to the desired shape.
I proceed in a precisely similar manner to that hereinbefore described respecting
one end to form the other end of rack-pulley-frame.
Rack-pulley-frames made in the manner hereinbefore described are superior to
cast frames produced at the same cost.
I do not lay any claim to the pulley o actuated by a screw p as shewn at
Figure 5, as my invention consists in producing the rack-pulley-frame ready to
receive the pulley o and its mover or connections.
my
Having now particularly described and ascertained the nature of said
invention, and in what manner the same is to be performed, I declare that what I
claim is,
1st. The making of rack-pulley-frames under the first modification of my
invention as illustrated and described in reference to Figures 1, 2, 6, and 7.
2nd. The making of rack-pulley-frames under the second modification of my
invention as illustrated and described in reference to Figures 3 and 4.
CML 1000
TOM HOLLAND LAWTON.