Year: 1886

page_text: I GEORGE BOYD THORNTON of 78 Princes Street Edinburgh in the County of
Midlothian Scotland India Rubber 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 in and 'by the following statement:-
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Titl
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My invention has for its object a more complete prevention of noise in closing
doors than is effected by any of the plans hitherto employed for the purpose, in
which it has been found that the ordinary appliances fitted to the framing of the
door have had no effect in reducing the jarring noise occasioned by the catch of
the lock striking against the plate inserted in such framing.
And my invention consists in combining with any of the appliances fitted to the
door frame described in the Specification of my Patent N° 12,605 (1885) a block
or cushion of India Rubber adapted and applied to the side of the plate inserted in
the framing of the door, such block or cushion being suitably formed to receive
the stroke of the catch before it enters the slot in the plate. The India Rubber
yields sufficiently to allow the catch to enter and pass through the slot in the plate
and into the cavity in the door-frame without noise.
The said plate is or may be formed with two small bars projecting from one side
to receive the cushion part of the block of India Rubber between them, another
portion of this block forming an elastic backing behind the said bars. Or the block
or cushion may be otherwise inserted in the plate, and it is formed with a bevilled
or rounded edge to facilitate the passing of the catch over it.
Or the block or cushion may be inserted in the nose of the catch instead of in
the said plate. Or instead of the block or cushion a roller of India Rubber may be
fitted in the said plate.
In order that my invention may be fully understood, I will describe it more
particularly by the aid of the accompanying drawings, in which are represented the
parts above referred to.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 represents a door with either of the appliances described in the Speci-
fication of my Patent N° 12,605 (1885) fitted to the door-frame at a. a and my
present improvement at b. combined therewith together with the edge of the lock
and its catch at c.

page_text: Fig. 2 represents on an enlarged scale a portion of the door-frame with my
present improved means of preventing noise applied thereto. d is the ordinary
plate fixed in the door-frame having in it the usual slots e and f. to receive the
catch and locking bolt respectively; g. g. are two small bars projecting from the
side of the plate d. between which is inserted the block or cushion of India
rubber h. which is formed with a cushion part projecting through the space between
the bars g. g. and a portion h* which serves as an elastic backing next the wood
of the door-frame.
Fig. 3 is a vertical section through the bars g. g. and the block or cushion h.
Fig. 4 is a horizontal section in the line A B of Fig. 2 shewing a portion of the
door-frame with the plate d. and block or cushion h. and the cavity i. to receive
the catch.
Fig. 5 is a similar horizontal section shewing an India rubber roller k. in
substitution for the block or cushion; l. is the catch of the lock and m. is a portion
of the door.
Figures 6 and 7 represent in section and plan the catch 1. with a piece of India
rubber n. inserted in the nose thereof.
Figures 8 and 9 are similar views shewing a different mode of inserting the
piece n.
By means of the combination of the appliances a. a and b. shown in Fig. 1 the
most perfect preventive of noise in closing doors is obtained, but the block or
cushion h. or the roller k. applied to the plate d. or the piece n. applied to the
catch . may be used separately.
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
First. The combination of the appliances to the door-frame described in the
Specification of my Patent N° 12,605 (1885) with the India rubber block or
cushion h. or roller k. applied to the plate d. or the piece of India rubber n. applied
to the catch 1. substantially as and for the purposes described.
Secondly. The block or cushion h. or the roller k. applied to the plate d. sub-
stantially as and for the purpose described.
And thirdly. The application to the catch . of a piece of India rubber n.
substantially as and for the purpose described.
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