Year: 1886

page_text: I, THOMAS YOUNG, of 27, Green Street, Smethwick, in the County of Stafford,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved method of bringing the spindles of
door-locks to bear upon the latch bolts thereof, for the purpose of drawing the
latter out of the staples, or striking plates.
In carrying it into effect, I may make the spindle of any convenient section,
instead of confining myself to the square section now in general use.
Upon this spindle, I fix a roller, or form a projection the outer face of which is
an inclined plane or planes, capable of rolling, or of sliding against a corresponding
plane or planes, or roller or rollers, respectively on a convenient part of the latch
bolt, and withdrawing it from the staple, or striking plate, by the simple act of
pushing or pulling the spindle.
The return of the spindle is effected by the usual feather spring, assisted by a
(preferably) spiral spring conveniently situated for being compressed when the
spindle is pulled or pushed, and which also prevents the handles or spindle shaking
loosely in the lock.
The knobs are secured to the spindle in any convenient way, although one of
them, that next to the projection on the spindle may be rigidly attached to the
spindle.
This spring is, preferably. on the same side as the loose knob.

page_text: Figs. 6 and 7 are details.
The figures illustrate the application of my invention to a mortice latch baving
handles on one side only, although I would have it distinctly understood that it is
applicable to all kinds of latches and locks having latch bolts, and may be fitted
with handles on both sides.
A is the front edge of the door, and a the latch bolt.
B is the spindle, of any convenient section.
C is a roller carried by the bolt, and c, c¹, two inclined planes formed on the
spindle, and standing one on each side of the roller which they embrace.
The roller may be replaced by a pair of inclined planes contacting with those c, c¹,
on the spindle B, and the two inclined planes c, c¹, may be replaced by rollers.
According to the construction of spindle illustrated in Figs. 3 and 4, if either
projecting end of the spindle be driven in by actuating its handle or knob, the
latch bolt will be drawn into the case of the latch or lock, to be forced out again,
however, by any convenient spring as soon as the handle is free. I do not confine
myself to any particular type of spring for the purpose, as it is obvious that the
ordinary feather spring, or a spiral spring upon the stem of the latch will answer
this purpose.
•
In Figs. 1, 6 and 7, however, I illustrate a means of returning the spindle which
serves also to take up slack when the spindle is a trifle too long for the door; to
keep the spindle up to its work; and to prevent it and the knobs from shaking or
rattling.
D is a cup or socket fixed in or on the door and concentrically with the axis of
the spindle B which may therefore according to its length enter or pass through
this socket.
A spiral spring, d, is inserted in this cup which bears against the end of the
spindle when there is a handle on only one end thereof as in Fig. 1; or is com-
pressed or held in partial tension between the spindle and either the handle or the

page_text: lock or latch case. The flange of the cup may be extended if desired to receive the
nose of the knob.
Fig. 5 is an alternative construction of spindle with only one incline, to be used
under circumstances where there is only one handle.
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:-
1. One, or a pair of, inclined planes on a latch spindle in combination with one,
or two, inclined planes or a roller on the latch bolt, with which plane or planes or
roller the plane or planes on the spindle can engage for the purpose of drawing the
latch bolt into the latch case, substantially as described with reference to the
accompanying figures.
2. A roller upon a latch spindle in combination with a corresponding roller or
inclined plane or planes upon the latch bolt, with which roller or plane or planes
the roller upon the latch spindle can engage for the purpose of drawing the latch
bolt into the latch case substantially as described with reference to the accom-
panying figures.
3. The combination of cup or socket fixed concentrically around the latch
spindle, and which receives a spiral spring in combination with the spindle, sub-
stantially as and for the purpose described with reference to the accompanying
figures.