Improvements in "Scarboro'" Trunk Looks.
Year: 1892

page_text: Date of Application, 11th Feb., 1892-Accepted, 19th Mar.,
1892
COMPLETE SPECIFICATION.
Improvements in "Scarboro'" Trunk Looks.
1, JOSEPH LEGGE, of Stafford Street, Willenhall in the County of Stafford,
Lock Manufacturer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
n and by the following statement :-
My invention relates to that class of trunk locks made out of sheet metal which
are known in the trade as "Scarboro'" trunk locks, and has for its object to
greatly strengthen such locks, without materially adding to the cost of production.
In "Scarboro" locks of the cheaper kind the metal employed is of so thin a
gauge, that the locks are flimsy and unreliable in the extreme. The hasp, in
particular, upon which the chief strain comes, is very ill fitted to bear it, so that
the security afforded by the lock is of a merely nominal character. In a lock
made on the principle I am about to set forth, great rigidity of the sheet metal
parts is attained, even where the lightest gauges of material are employed.
According to my invention all the parts of the lock upon which any strain is
likely to come in actual use, (and particularly the hasp) are suitably fluted or
corrugated in any convenient manner and by any suitable means. Such parts of
the lock are thus very much stiffened while the extra cost incurred in manufacture
is merely that due to the process of forming the flutings or corrugations.
In order that my invention may be more clearly understood I will describe it in
reference to the accompanying drawings and the letters of reference marked
thereon. The same letters occurring in different figures illustrate corresponding
parts.
"Scarboro*"
Figures 1 and 2 are respectively a front and side elevation of a
trunk lock hasp made of thin sheet metal, and strengthened with the flutings or
corrugations above mentioned.
Figure 3 is a section on line G H of Figure 1.
The top part D of the hasp is here shown quite plain in order that the thickness
of the metal may be the more readily compared with the thickness of the flutings
or corrugations. AAAAA are the flutings or corrugations on the hasp. B Bare
the flutings or corrugations in the "sunk" part of the hasp (see Figure 2) and
CC are the same flutings or corrugations continued on the lower extremity of the
said hasp. These flutings or corrugations may be produced in any convenient
manner, and by means of any arrangement of processes. Of course I do not bind
niyself either to the number or the position of flatings or corrugations shown in
the drawing, but reserve the right of making them as numerous as may be con-
venient or desirable, and of arranging them in any position whatsoever. Their
section also is merely a matter of choice and may be either a V section, a square
section, or a curved section as shown in drawings.
It is my intention to use this invention in conjunction with that described in
Specification No. 20,840 A.D. 1890 for which a Patent has been granted to me on
April 14th 1891. In Figure 4 of the accompanying drawings is indicated the
manner in which I apply the said device of flutings or corrugations to the padlock
staple described in Specification No. 20,840 of 1890. In this figure E is the
completed padlock staple and F a fluting or corrugation stamped therein. In
Figure 5 this application is illustrated in side elevation.
Similarly I propose to adapt this invention to the peculiar construction of hasp
loops which is fully described in the Specification before quoted.
Instead of forming the said hasp loops (lettered B B in Figures 1. 3. 4 and 6 of
the drawings accompanying Specification No. 20,840 of 1890) out of plain sheet
metal, I intend at some convenient moment in the process of manufacture, and by

page_text: any suitable means, to flute or corrugate them with a view to increasing their
strength. But I have not thought it worth while to illustrate this application in
the accompanying drawings as it will be immediately obvious to a practical lock
maker.
Although I have described my invention only as applied to the hasp of a
"Scarboro'" lock made from sheet metal, and to the padlock staple and hasp loops
thereof, it is obviously applicable to any part of the lock where it may seem
necessary or advisable to give increased strength.
"
Having thus particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1st. Strengthening the hasps of "Scarboro"" trunk locks stamped out of sheet
metal, and any other parts upon which a strain is likely to come, by means of
suitable flutings or corrugations, substantially as and for the purpose herein
described and illustrated by the accompanying drawings.
2nd. Strengthening a "Scarboro'" trunk lock padlock staple formed out of
sheet metal in accordance with the method described in my Specification No. 20,840
of 1890, by means of one or more suitable flutings or corrugations, substantially
as herein described and illustrated by Figures 4 and 5 of the accompanying
drawings.
3rd. Strengthening "Scarboro"" trunk lock hasp loops formed out of sheet
inetal in accordance with the method described in my Specification No. 20,840
of 1890 by means of one or more suitable flutings or corrugations, substantially as
herein described.
Dated this 10th day of February 1892.