IMPROVEMENTS IN TRAMWAYS
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Albert Evan Adlard at the
Office of the Commissioners of Patents on the 17th April 1883.
ALBERT EVAN ADLARD of Bartholomew Close in the City of London,
IMPROVEMENTS IN TRAMWAYS."
The object of the Invention is to afford increased facility for transposing the
respective rails so that as the respective operating edges or angles become worn or
otherwise it may be desired to change the relative positions of the respective rails
such changes may be readily effected.
For this purpose the inner and outer rails are not only formed separate, but the
surface of each rail which at one time may be the uppermost is formed similar to
that which at such time is the lower most so that either surface of each rail may
when desired become the upper or the lower one.
Each of these rails is formed with a longitudinal groove on each of its sides and
about midway of its depth to receive the edges of a longitudinal plate or bar which
when placed between two such rails with the edges thereof in each respectively
such plate or bar serves to maintain correct relation between them and at the same
time to act as the bottom or sole between the pair of rails
The grooves which for the time are the outside of the space between a pair of
rails serve to receive cotters or keys or fixing pieces to hold the respective rails in
the "chairs."
By these means as the four edges or angles of each of the rails in their turn
become worn, a fresh edge or angle of each may be brought into position until all
four edges of the respective rails have become worn

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Albert Evan Adlard in the Great Seal Patent Office on the
16th October 1883.
ALBERT EVAN ADLARD of Bartholomew, Close in the City of London
"IMPROVEMENTS IN TRAMWAYS"
The object of the invention is to afford increased facility for transposing the
respective rails so that as the respective operating edges or angles become worn or
otherwise it may be desired to change the relative position of the respective rails
such changes may be readily effected.
For this purpose the inner and outer rails are not only formed separate but the
surface of each rail which at one time may be the uppermost is formed similar to
that which at such time is the lowermost so that either surface of each rail may
when required become the upper or the lower one.
Each of these rails is formed with a longitudinal groove on each of its sides and
about midway of its depth to receive the edges of a longitudinal plate or bar which
when placed between two such rails with the edges thereof in each respectively
such plate or bar serves to maintain correct relation between them and at the same
time to act as the bottom or sole between the pair of rails. These grooves which
for the time are the outside of the space between a pair of rails serve to receive
cotters or keys or fixing pieces to hold the respective rails in the chairs.
By these means as the four edges or angles of each of the rails in their turn
become worn a fresh edge or angle of each may be brought into position until all
four edges of the respective rails have become worn.
But that the invention may be the better understood I will by the aid of the
accompanying Drawings proceed to describe means pursued by me in carrying the
Bame into effect.
DESCRIPTION OF THE DRAWINGS
Figure 1 shews a side view of parts of a pair of rails and parts connected
therewith arranged according to my invention as held in a suitable chair (which
may be of the ordinary character) Figure 2 shows a sectional end view of
Figure 1, and Figure 3 is a plan view thereof. Figures 4 and 5 are sections of the
respective rails separately.
-
In each of these views the same letters are employed to indicate corresponding
parts.
a, and b, are rails which are formed separate and the surfaces a². a². of the rail a.
are formed to correspond and in like manner the surfaces 61 and 62 of the rail b,
are formed also to correspond one with the other so that as already stated either
surface of each rail may when desired form the upper or the lower one.
Each of these rails is formed with a longitudinal groove a³. a³. or b³. 63. in each of
its sides to receive the edges c. c. of a plate or bar c. when that plate is placed
between two such rails a. b. and such plate or bar c. when so placed between two
such rails a. b. serves to maintain correct relation between them and at the same
time to act as a.bottom or sole between the pair of rails a. b. The grooves a³. 6³.
which for the time are the outside grooves of a pair of such. rails serve to receive
cotters or keys d, e, or other fixing pieces to hold such rails in chairs for other
suitable chairs. By these means as the four edges or angles a*. a*. a*. a*.
or b*. b*. bx. b*. of either of the rails a. or b become worn a fresh edge or angle a*.
or bx. may be brought into position until all four of such edges of the respective

page_text: rails has become worn. fl. fl. represent fins or projections between the sides of
the chair f. adapted if desired to aid in supporting the plate or bar c, and in giving
strength and solidity to the parts.
If desired the plate or bar c may be formed with one of the rails a or b. as shown
by dotted lines in Figure 2 and separately at Figure 6.
Having thus described my Invention and means which I adopt in carrying the
same into effect I would have it understood that what I claim is the improvements
in tramways whereby facility for transposing the rails thereof is obtained substan-
tially as described.
In witness whereof I the said Albert Evan Adlard have hereunto set my
hand and seal this sixteenth day of October One thousand eight hundred and
eighty three.
ALBERT. E ADLARD. (L.S.)