An Automatic Apparatus for the Opening of Lavatory Doors and other such Doors on Prepayment.
Year: 1887

page_text: Date of Application, 15th Dec., 1887
Complete Specification Left, 13th Sept., 1888
Complete Specification Accepted, 16th Nov., 1888
An Automatic Apparatus for the Opening of Lavatory Doors and
other such Doors on Prepayment.
THOMAS JOHN HANCOCK of "Treskelly" St. Margarets Twickenham in the County
of Middlesex do hereby declare the nature of this invention to be as follows:-
This invention is intended to obviate the need for money being passed through the
hands of an attendant in charge of Lavatories and such like places.
The invention consists in using a balanced lever bolt so weighted as not to yield to
any substance lighter in weight than the proper coin and only passing sufficiently
into the receiving slide by means of a bevelled edge or lip as to allow the proper
coin to come in contact with the balanced lever bolt all smaller coins passing through
the receiving slide without affecting the balanced lever bolt. The coin coming in
contact with the bevelled edge or lip of bolt the opposite end is raised to the limit
allowed by the hasp so that the door is enabled to be pulled or pushed open when open
the bolt is set at liberty to rise to its full extent and the coin to fall to the bottom or
place assigned for it the bolt resuming its normal position. The door closing by the
action of its spring replaces the bolt into the hasp.

page_text: COMPLETE SPECIFICATION.
An Automatic Apparatus for the Opening of Lavatory Doors and
other such Doors on Prepayment.
THOMAS JOHN HANCOCK of "Treskelly" St. Margarets Twickenham in the County
of Middlesex, Gentleman, 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 stateinent:-
This Invention is intended to obviate the need for money being passed through
the hands of an attendant in charge of Lavatories and such like places..
The Invention consists in using a balanced lever bolt so weighted as not to yield to
any substance lighter in weight than the proper coin and only passing sufficiently
into the receiving slide (marked E on Figure 1 of the drawings) by means of a bevelled
edge or lip (marked B on Figure 1) as to allow the proper coin to come in contact
with the balanced lever bolt, all smaller coins passing through the receiving slide
without affecting the balanced lever bolt. When the coin which in its passage down-
wards comes in contact with the bevelled edge or lip (marked B on Figure 1) of the
bolt, the opposite end (marked A on Figure 1) is raised to the limit allowed by the
hasp (marked D on Figure 2) and is thus set free from the catch (marked Con
Figure 2) the coin still resting on the bevelled edge (marked B on Figure 1) the
door then is enabled to be opened and as soon as the end of the bolt (marked A on
Figure 1) has left the hasp it is raised by the weight of the coin at the bevelled edge
(marked B on Figure 1) until the coin has room to pass said bevelled edge and the
coin falls to the place assigned for it, the bolt then resumes its normal position and
the door being closed by the action of a spring, or otherwise, the bolt at the end
(marked A on Figure 1) upon meeting the hasp at the point (marked Fon Figure 2)
is raised until said end reaches the catch (marked C on Figure 2) into which it
falls the door is then closed and can only be reopened from the outside by means
of the required coin, but is opened from the inside by an ordinary handle-See
Figure 3.
Having now 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
1. The formation of the balanced lever bolt.
TUL