Improvements in and in Apparatus for the Manufacture of Note Pin or Music Plates for Mechanical Musical Instruments
Year: 1889

page_text: Date of Application, 4th May, 1889-Accepted, 15th June, 1889
COMPLETE SPECIFICATION.
Improvements in and in Apparatus for the Manufacture of Note
Pin or Music Plates for Mechanical Musical Instruments.
I, PAUL LOCHMANN, of Gohlis, Leipsic, Germany, 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 manufacture of music plates of note pin piates used
in mechanical musical instruments, and in apparatus for punching the said plates
The pins or lugs of the said note piu plates or music plates, when formed by being
partially punched out of the metal plate and bent up at right angles to the plane
thereof, are liable to be bent or crippled or even entirely broken off after the plates
have been in use but a short time.
The object of this invention is to obviate this defect in such music plates, and 11
consists in partially punching out and bending up a second piece of metal immediately
adjacent to each note pin or Ing in such a manner as to act as an abutment ther for
and support it against the bending strain which comes upon it in the operation of the
musical instrument
Reference is to be had to the accompanying drawings forming part of this
specification, wherein figure 1 is a face view of a portion of a music plate and figure 2
is a section thereof on line X Y shewing two such pins or lugs as formed by punching
out and bending up from the-plate, together with their respective abutments Figure 3
1s a section representing the double punch used for the purpose of simultaneously
forming the pin or lug and its abutment The same letters of reference indicate like
parts in all the figures.
a are two note pins or lugs formed of a piece of metal partially punched out from
the plate p and bent up at right angles to the plane thereof, and are their respective
abutments also formed of a piece of metal partially punched out from the plate and
bent up immediately in rear of each pin or lug a, the punching operation being so
performed that the abutment is bent towards the pin or lug a so that the free ond
abuts directly against the rear side of the pin or lug a and supports the latter at the
side opposite to that at which the stiain comes upon it when in operation
The note pin or lug and its abutment are punched and bent simultaneous's by
means of a pair of punches c d fixed adjustably in the same holder of a suitable
punching press operated by a cam or in any other convenient manner. The punch c
stamps out and bends up the pin or lug a at right angles to the plate 2 whilst this
punch & punches out the abutment b and at same time bends it towards the reu side
of lug a, this bending of the abutment b being effected by bevelling the cutting und of
the punch at such an acute angle that as it penetrates the plate gradually the bevelled
face imparts a gradually increasing curl or bend to the piece of metal partially punched
out from the plate and so causes it to curl up, as shewn, the punch d being set slightly
in advance of the punch c.
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 18:
1 In the manufacture of music plates or note pin plates for mechanical musical
instruments in which the pins or lugs are formed by being partially punched out and
bent up from the plate, the combination with each pin or lug of an abuument similarly
formed but bent up so that its free end abuts against the back of the note pin or lug
and thereby strengthens or supports the same, as described
2. In un apparatus for manufacturing the herein described note pin or music plates,
the combination of two punches c and d fixed in a holder the cutting ends of the

page_text: punches being oppositely bevelled that of the punch for forming the abutment being
bevelled at a more acute angle than the other for the purpose of causing the abutment
to curl up until its end abuts against the rear side of the pin or lug, as described.
Dited this 4th day of May 1889.
P. LOCHMANN
By A. M & Wm. Clark,
Patent Agents, 53, Chancery Lane, London
P. LOCHMANN
By A. M & Wm. Clark,
Patent Agents, 53, Chancery Lane, London