IMPROVEMENT IN KEYS FOR LOCKS
Year: 1876

page_text: LETTERS PATENT to Richard Smith, of 8, Lady Somerset Road, London, for
the Invention of "IMPROVEMENT IN KEYS FOR LOCKS."
PROVISIONAL SPECIFICATION left by the said Richard Smith at the Office
of the Commissioners of Patents on the 28th March 1876.
RICHARD SMITH, of 8, Lady Somerset Road, London.
FOR LOCKS."
"IMPROVEMENT IN KEYS
The pipe made in the stem or barrel of some lock keys are liable to fill with
matter by being carried in the pocket, and from other causes, which prevents the
key from entering the key hole of the lock sufficient for use until the dirt is removed
from the key barrel by picking out. My improvement is intended to remedy
this by having the pipe in the key barrel made through the whole length of the
barrel, so that any dirt that happens to get in the pipe will be forced out by the
stem on which the key revolves when the key is being used, or instead of the pipe
or opening extending through the entire length of the barrel, the keys as now made,
may have one or a series of slots or openings of any form made through the side of
the stem of the key to communicate with the pipe for the exit of any dirt that may
collect in the pipe. This improvement is applicable to watch and all other kinds of
hollow stem keys.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Richard Smith in the Great Seal Patent Office on the 11th September
1876.
RICHARD SMITH, of No. 8, Lady Somerset Road, London.
KEYS FOR LOCKS."
"IMPROVEMENT IN
The pipe made in the stem or barrel of some lock keys are liable to fill with
matter by being carried in the pocket, and from other causes, which prevents the
key from entering the key hole of the lock sufficient for use until the dirt is removed
from the key barrel by picking it out. My improvement is intended to remedy
this by having the pipe in the key barrel made through the whole length of the
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page_text: barrel, so that any dirt that happens to get in the pipe will be forced out by the
stem on which the key revolves when the key is being used, or instead of the pipe
or opening extending through the entire length of the barrel the keys, as now
mde, may have one or a series of slots or openings of any form made through the
side of the stem of the key to communicate with the pipe for the exit of any dirt
that may collect in the pipe. This improvement is applicable to watch and all
other kind of hollow stem keys.
The accompanying Drawings forming part of this Specification represent plans of
my improvement.
Fig. 1 shows a longitudinal section of a key with the pipe made through the
entire length of the barrel, and terminating at the bow or handle end of the key, as
represented at A. The pipe or opening through the barrel is cylindrical in its trans-
verse section, but may be made of any other shape beyond where it revolves on the
stem in the lock.
Fig. 2 shows a key partly in section, with an opening B made through the side of
the barrel of the key, and communicating with the pipe for the exit of any dirt
that may collect in the pipe, as herein-before stated.
Fig. 3 shows a watch key to an enlarged scale, with the improvement applied.
Lateral openings may be made in this class of keys, as represented at B in Fig. 2 for
the exit of the dirt from the pipe if desired.
Having described the manner of constructing and using my improvement what
I claim is, providing the key barrels with pipes or openings through their entire
length, or at their sides, for making them self-cleaning, as herein-before described.
In witness whereof, I, the said Richard Smith, have hereunto set my hand
and seal, this Nineteenth day of August, in the year of our Lord One
thousand eight hundred and seventy-six.
DYADA
RICHARD SMITH. (L.S.)