Heater unit constant volume equipment -- have in response to liq.The sum of temperature is connected to the variable-volume expansion tank of the heater at center

摘要

A light sign comprising an illuminant (1) provided with substantially parallel channels (2) for discharge tubes (3), at least one translucent sign panel as a support or holder for sign message and a frame (9) which peripherally defines the light sign. The object of the invention is to form a light sign specially intended to be used in such connections where a re-signing often occurs, e.g. on taxi-cabs and where the sign should be very narrow for having as little air resistance as possible, where re-signing should be done with a few manipulations of the sign and without weakening the frame construction of the sign. The light sign should further by simple means be connectible to attachment of different kinds, so that several light signs can be connected with each other forming a continuous unit, e.g., for providing screen walls for exhibition purposes. These objects have been achieved by the fact that the illuminant (1) comprises at least one channel plate provided with channels open at opposite side edges of the plate and into which said discharge tubes (3) are insertable, and that the frame (9 ) at at least two opposite sides is provided with guides (16) for receiving a sign panel (5) insertable into these from one end side.