IMPROVEMENTS IN APPARATUS FOR VENTILATING TRAMWAY CARRIAGES AND THE LIKE AND FOR DISPLAYING MOVING ADVERTISEMENTS " THEREON
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Gerard Wenzeslaus von Nawrocki at
the Office of the Commissioners of Patents on the 18th January 1883.
A communication from Colonel Louis von Vöneky, Otto Suter and Joseph
Lehmann all of Berlin Germany
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the firm of J. Brandt
& G. W. v Nawrocki, Patent Solicitor and Civil Engineer of 124 Leipzigerstrasso
Berlin Germany
"IMPROVEMENTS IN APPARATUS FOR VENTILATING TRAMWAY
CARRIAGES AND THE LIKE AND FOR DISPLAYING MOVING ADVERTISEMENTS
"
THEREON (A Communication from Colonel Louis von Vöneky, Otto Suter and
Joseph Lehmann, all of Berlin Germany)
One object of this invention is to provide a positively driven ventilating
appliance for tramway carriages and which shall be effective whichever direction
the carriage is moved. For this purpose a vertical spindle is provided at one end
of the carriage. This spindle is enclosed in a tube and derives rotary motion from
one of the tramwheel axles by chain wheels and endless chain. On the upper end
of the vertical spindle two pulleys are provided which by open and crossed cord or
band transmit motion to a ventilating fan which is arranged in an opening of the
carriage roof communicating with the interior of the carriage; on the fan spindlo
there are three pulleys, the middle one loose and the two others fixed. One cord
or band always runs on the loose pulley. The shifting of the two cords or bands
is effected as required by means of a "striking gear" say in the form of a vertical
rod with three prongs and having a horizontal arm which is connected to a disc
provided with index hand; according to the direction in which it is pointed and in
which the vehicle travels so will the open or the crossed strap be thrown into
connection with the fan spindle. A spring is provided for holding the gear in
position
Another object of this invention is to provide suitable appliances for displaying
moving advertisements and to combine the driving gear for same with that of the
driving gear for the ventilating fan. It has heretofore been proposed to provide
appliances for displaying moving advertisements to traincars and the like; a rotary
vertical druin has thus been proposed, also a roller on a vertical spindle at each

page_text: corner of the vehicle. Both plans have disadvantages. The single drum takes up
too much space when made of a size to make it pay. The four rollers with one
endless band passed round them obscures the advertizing boards and is inapplicable
to tram cars, with top seats.
According to this invention an endless band is provided on each side a little
distance above the top of the roof. These endless bands each pass round two
drums or rollers on vertical spindles. Each band is composed of two thin narrow
steel tapes which are connected by cross pieces, on which framing so formed thin
sheet iron or steel tablets containing advertisements are screwed rivetted or other-
wise fixed. These endless bands are driven from the aforesaid vertical spindle that
also drives the ventilating fan. For this purpose the spindle is provided with two
small chain wheels which by chains transmit motion to a chain wheel fixed on a
spindle of each of the aforesaid endless bands.