IMPROVEMENTS IN ATTACHING DOOR KNOBS TO THEIR SPINDLES
Year: 1885

page_text: CHARLES GRAY SMITH & FRANK SMITH Manufacturers Deritend Bridge Works
Birmingham do hereby declare the nature of our invention for IMPROVEMENTS IN
ATTACHING DOOR KNOBS TO THEIR SPINDLES to be as follows:-
:-
This invention is for a spindle and clutch arrangement to make Knobs fast upon
a door without any screws appearing in the neck of the Knob as follows.
One Knob is made fast upon the spindle The other Knob is screwed upon the
other end of spindle, until in a position to take into a clutch arrangement which
slides upon the square of the spindle.
The Knob is then forced into the clutch and a slide or spacing piece affixed
bebind the fast Knob which completes the operation.
A Spindle is made of the ordinary description screwed at one end. The square
end is firmly fixed in one Knob the other of the spindle being screwed into the
second Knob. The second Knob is provided with a square mount or square pro-
jection upon the Knob. A loose clutch or collar slides upon the spindle into which
the square projection will fit or the clutch may be made with one or more projec-
tions upon it or upon the Knob with corresponding recesses upon the other of
them. The collar runs in a socket provided on the rose plate The 1st Knob also
has a fast collar which works in the socket of the rose plates on the other side of
the door and is also provided with a slide piece or spacing piece made in any con-
venient manner so that when the clutch is drawn together the spacing piece when
put in position prevents the clutch being drawn apart and the Knobs are perfectly
secure.
The spacing piece may be secured in any convenient manner either by a simple
screw or a covering rose passed over it or a slide piece may be simply dropped in
a groove from the top only.
The application is as follows.
1st Fix your roses or plates F & FA against the door in the proper position, Pass
the spindle S with the fast Knob A attached through the door, slip on the clutch C
so that the collar works freely in the socket FA Then screw on the second Knob B
until it slightly bears against the face of the clutch C Let the projection brought
into a position to enter the recesses then push the Knob B so that when the pro-
jection enter the clutch C the first Knob A is driven back the same distance. Then

page_text: insert, the spacing piece G. GA or GB behind the first Knob and secure it
by means of covering rose H or screw I. The operation is then complete.
S
Spindle.
A
Fast Knob.
B
Screwed Knob.
с
D
E
F&F
G. GA & GB
Clutch or collar.
Projection to fit clutch.
Clutch with projection.
Sockets or roseplate.
Slide or spacing piece.
H Covering rose.
I
Screw to secure slide.

page_text: COMPLETE SPECIFICATION.
Improvements in Attaching Door Knobs to their Spindles.
CHARLES GRAY SMITH & FRANK SMITH Deritend Bridge Works Birmingham
in the County of Warwick do hereby declare the nature of this invention for
IMPROVEMENTS IN ATTACHING DOOR KNOBS TO THEIR SPINDLES and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement:-
This invention is for a spindle and clutch arrangement to make Knobs fast upon
a door without any screws appearing in the neck of the Knob as follows.
A spindle is made of the ordinary description, screwed at one end. The square
end is firmly fixed in one Knob, the other end of the spindle being screwed into the
second Knob. The second Knob is provided with a square mount or square pro-
jection upon the Knob, A loose clutch or collar slides upon the spindle, into which
the square projection will fit or the clutch may be made with one or more projec-
tions upon it, or upon the Knob with corresponding recesses upon the other of them.
The collar runs in a socket, provided on the ordinary rose plate.
The 1st Knob also, has a fast collar, which works in the socket of the rose plate,
on the other side of the door, and is also provided with a slide piece, or spacing
piece, made in any convenient manner, so that when the clutch is drawn together,
the spacing piece, when put in position prevents the clutch being drawn apart, and
the Knobs are perfectly secure.
The spacing piece may be secured in any convenient manner, either by a simple
screw, or a covering rose passed over it, or a slide piece may be simply dropped in
a groove from the top only.
The application is as follows
1st Fix your roses or plates F & FA against the door in the proper position. Pass
the spindle S with the fast Knob A attached through the door slip on the clutch C,
so that the collar works freely in the socket F, then screw on the second Knob B,
until it slightly bears against the face of the clutch C Let the projection be
brought into a position to enter the recesses then push the Knob B so that when
the projection enters the clutch C the first Knob A is driven back the same distance
Then insert the spacing piece G or GA or GB behind the first Knob and secure it in
place by means of covering rose H or screw I. The operation is then complete.

page_text: DRAWINGS AS SENT WITH PROVISIONAL SPECIFICATION.
Figure 1 shows projection D ready to slide on clutch C.
2 shows the clutch C D closed & slide G in place secured by rose H.
3 shows slide GA simply secured with screw I.
-4 shows spacing piece GB in two halves secured with screw.
We claim
1st The projection on screwed Knob pushing into sliding clutch on spindle
& forming connections.
•
2nd Slide or spacing piece filling space & preventing clutch becoming dis-
connected.