IMPROVEMENTS IN MACHINERY FOR CUTTING AND SHAPING SHEET METAL
Year: 1879

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LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and Com-
Solicitors of Patents, of 67, Strand, in the City of Westminster, Civil
pany,
Engineer, for the Invention of "IMPROVEMENTS IN MACHINERY FOR CUTTING
AND SHAPING SHEET METAL." A communication from abroad by Charles
Edgar Kennedy, of Hatley, Province of Quebec, in the Dominion of Canada,
Tinsmith.
"
COMPLETE SPECIFICATION filed by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 25th August 1879.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors. of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVE-
MENTS IN MACHINERY FOR CUTTING AND SHAPING SHEET METAL."
A com-
munication from abroad by Charles Edgar Kennedy, of Hatley, Province of
Quebec, in the Dominion of Canada, Tinsmith.
The improvements consist in constructing machinery substantially as herein
described and claimed, reference being made to the Drawings annexed, in which
Fig. 1 is an elevation of a machine embodying the Invention looking in the
direction of arrow 2, Figure 3.
Figure 2 is an elevation of the same looking in the direction of arrow 1, Figures 1
and 3, showing the clipping table and connections removed.
Figure 3 is a plan view of the same with the clipping table and connections in
place.
Figure 4 is a detail view of the base and clipping table support.
A is the base; B, the elevated frame; C, the radius arm; D, the clipping table;
G, the cam support or frame; H, the outside upper cutter frame; and I, the inside
lower cutter standard.
The base A is provided with slots a, b, c, for adjusting the various parts fitting
therein.
Secured to or forming a part of the base A is the elevated frame B, which is also
provided with a horizontal slot e. The frame B carries an oval hoop d, the upper
edge of which is level with the top of the frame B. Surmounting said frame B
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and hoop d, and resting thereon, is the radius arm C, which is shown pivoted at f
but it may be pivoted at any point desired, by means of the holes g, g, &c., and
g, g, g. A hand lever h serves to move the free end of the radius arm. This end
of the said radius arm is bent down at a right angle where it carries securely bolted
thereto a ■ shaped frame G, the purpose of which will hereinafter be more fully
explained A cam L operates to move a slide i, moving on ways on the edges of
the vertical portion of the radius arm C. Said slide carries a horizontal plate m,
which, by means of said cam L, may be pressed upon a similar plate n, resting on
the part t of the U-shaped frame G, as shown in Figures 1 and 2.
Cutter discs, 1, 2, 3, operating in the ordinary manner are supported as
follows: The disc k is mounted on a shaft revolving in a bearing in the frame H,
disc on a shaft revolving in the top of standard J, disc k² on a shaft revolving
in the lower extremity of the hanger I, and disc ks on a shaft revolving in the
upper end of standard K. The hanger I and standard K are adjustable horizon-
tally, the slots e and b permitting said adjustment.
The upper edge of the hoop d is level with the top face of the frame B, and
serves to support the radius arm C when not parallel with the frame B.
When adjusting a sheet of metal between the clamps m and n the radius arm C
is moved in the direction of arrow 1, Figures 1 and 3, until arrested by the stop o;
the piston of the sheet is adjusted by means of the adjustable gauge standards p, q, r,
secured to a slotted link shaped piece s, also bolted to the base A by a bolt passing
through the slot a.
The sheet having been adjusted is now firmly clamped by an upward movement of
the handle of the cam L, and by means of handle h the radius arm C carried past the
cutters k, k, l, ³, thus trimoning the edges of the sheet to circles corresponding to
the radius of the arm C, whose motion is continued until the cylindrical portion.t
of the frame G enters the cleft u in the table D. The said table is secured to a
vertical post or stud v, the lower extremity of which is journalled to a plate w
secured to the base A by a bolt y passing through the slot c. The head of the said
bolt projects into a groove which is cut out of a portion of the circumference of
the post v, and serves by the adjustment of the plate w in slot c to determine the
amount of rotation of the table D. The groove a is cut away in such a manner
that the ends of this cut away portion strike the head of bolt y when the table D
is made to partially revolve by the cylindrical portion t of frame G entering or
leaving the cleft u in the table D.
The relation of the parts t, u, x, and y is such that the bifurcated edge u of said
table when turned as far in the direction of arrow 3 as the head y will permit will
always be in the proper position for the part t to enter the cleft u. This relation
is also such that the table D, by the entrance of the part t in the cleft u, will be
turned in a reverse direction until arrested by the head y, when lines' parallel with
the shear-knives a will cross each other on a line running through the centres of
table D and bolt f.
The relation of the shear-knives a¹ and cutting edges of the table D with the
clamps m, n, is such that the sheet being operated on will be carried between
said knives and table, when the edges of the sheet not previously operated on may
be clipped to a uniform angle corresponding with that of the shear knives a¹. In
order to cause the said shear knives a¹ to move vertically true they are secured to
vertical posts b¹, springing from the arm c¹, which is provided with parts d working
on vertical ways c on the projecting portion f, forming a part of the post v. A
foot lever (not shown) operates the lever g2 by means of the connecting rod h¹ in
the direction of arrow 4, Figure 1. The lever g2 being pivoted to the top of
standard m¹ will be depressed at n¹, where it carries a roller o forcing the shear
knives a¹ and connections downward, thus clipping the sheet which may be in
position for that purpose. Springs p¹ return the shear knives a¹ to their original
position..
The sheet having been clipped is now carried by means of handle h in the direc-
tion of arrow 1, Figure 3, until the handle of the cam L collides with the horizontal

page_text: portion of the trip i¹, which is so constructed as not to swing in that direction,
thus opening the clamps m, n. The sheet then collides with similar trips j¹, k¹, which
removes it and allows it to fall out of the way.
The gauge is provided at the top with a device which in operation is similar
to those i, j, k, and its object is to permit the passage of the sheet after having
served as a gauge for the same by turning down while the sheet is passing over it,
and then assuming a vertical position again by means of a coiled spring. The
operations of those i, j, k, are exactly similar, and serve purposes as hereinbefore
set forth.
1. In a sheet metal cutter and shaper the adjustable radius arm C, having the
handle h, U shaped frame G, cam L, and clamps m, n, secured thereto, substantially
as described.
2. In a sheet metal cutter and shaper the table D and shear knives a¹ and their
connections, operating and constructed substantially as described.
3. The combination with the radius arm C and its attachments the cutters k, k², k², k³,
as set forth.
4. The combination with the radius arm C, the frame B, banger I, and base A,
substantially as set forth.
5. The combination with the base A of a sheet metal cutter and shaper, the
frame H, trip ', fixed standard J, adjustable standard K, and cutters k, k¹, k² k³,
arranged and operating substantially as and for the purpose specified.
6. The combination with the base A of a sheet metal cutter and shaper, the
adjustable gauges p, q, r, arranged and operating substantially as shown.
7. The combination with the base A of a sheet metal cutter and shaper, the
slots a, b, c, gauges p, q, r, table D and its attachments, standards J, m³, and post v,
substantially as and for the purpose set forth.
8. The combination of the frame B, perforated with holes g', with the supporting
hoop d, radius arm C perforated with holes g and pivoted to frame B by means of
a boit f, operating substantially as and for the purpose described.
9. The combination with the base A of the plate w, bolt y, slot a, and post v, the
ways c, d, knives a, lever g¹, and table 1 having the cleft u substantially as and
for the purpose specified.
10. The combination of the radius arm C, cam L, frame G, with the clamps m, n,
and part t working in connection with the cleft u in the table D, and operating
substantially as and for the purpose shown and described.
11. The combination of the trips i, j, k, acting one with the other, substantially
as and for the purpose shown.
12. The combination with a base A, frames B and H of an adjustable radius
arm C, adjustable hanger I, adjustable standard K, and adjustable table D with
knives a¹, arranged and operating substantially as and for the purpose set forth.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this Twenty third day of August, A.D. 1879.