Improvement in the Manufacture of Door and other Ornamental Metallic Knobs.
Year: 1887

page_text: Date of Application, 18th Feb., 1887
Complete Left, 18th Nov., 1887
Complete Accepted, 20th Jan., 1888
PROVISIONAL SPECIFICATION.
Improvement in the Manufacture of Door and other Ornamental
Metallic Knobs.
I JOSEPH WALKER of 4 Regent Parade Birmingham in the County of Warwick
Brassfounder do hereby declare the nature of this invention to be as follows:-
My invention has for its object an improvement in the method of ornamenting
hollow metallic door and other similar knobs. Hitherto the ornamentation has been
stamped or embossed upon separate discs of metal, the said discs being afterwards
attached to or inserted into the fronts of the knobs.
By my improvement I stamp or emboss the desired ornamentation either upon the
flat discs or blanks of metal from which the knobs are formed, or preferably upon the
fronts of the said discs after they are drawn through and formed into cups or caps
and before they are closed over and attached to the necks of the knobs.

page_text: COMPLETE SPECIFICATION.
Improvement in the Manufacture of Door and other Ornamental
Metallic Knobs.
JOSEPH WALKER 4 Regent Parade Birmingham in the county of Warwick
Brass founder 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 has for its object an improvement in the method of ornamenting
hollow metallic door and other similar knobs. Hitherto the ornamentation of the
front of the knob has been stamped or embossed upon separate discs of metal, the
said discs being afterwards attached to or inserted into the knobs.
By my improvement I stamp or emboss the desired ornamentation upon the blanks
from which the knobs are made, after they are drawn through and formed into cups,
and before they are closed over and attached to the necks of the knobs, as hereinafter
described and illustrated by the accompanying drawings.
Fig. I is a plan of the flat blank out of which the knob is made.
Fig. 11 is a section of blank drawn through before being embossed.
Fig. III is a perspective view of cup embossed after being drawn through.
Fig. IV is a perspective view of Fig. III after being formed into a cup ready for
closing on to the neck of the knob.
Fig. IV is a plan of Fig. IV.
Fig. V is a perspective view of neck of knob.
Fig. VI is a section of cup closed on to neck of knob.
The knob or cup is made out of a round flat blank cut from sheet metal as shown
in Fig. I and by a process of drawing through is formed into a hollow cup as shown
in Fig. II. I then by means of a pair of dies, the one fitting the outer and the other
the inner part of the cup, stamp or emboss the desired pattern or design upon the
said cup as shown at a Fig. III & IV. The cup is then by a further process closed
in at the mouth as shown at bb Fig. IV until it is small enough to fit the groove c c
Fig. V in the neck of the knob. The mouth of the cup bb is then placed on the
neck of the knob and the metal edges a a Fig. IV forced into the groove cc of the
neck of the knob as shown at b b Fig. VI. Thus producing an ornamental design
upon ordinary sheet metal knobs at a reduced cost.
I would have it understood that I do not claim the process herein described of
manufacturing plain knobs, my invention only relating to ornamental knobs.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :
The manufacture of ornamental door and other metallic knobs as herein before
described and illustrated by the accompanying drawings.
Dated thin 17th dose of N
1007