US 1412692 A
Description (OCR text may contain errors)
Patented Apr. 11, 1922;
L. P. LINDEN.
ADVERTISING SIGN. APPLICATION FILED FEB. 27, 1922.
LOUES PERCY LINDEN, OF LONDON, ENGLAND.
Specification of Letters Patent.
Patented Apr. it, 1%22.
Application filed February 27, 1922. Serial No. 539,640.
To all whom it may concern.
Be it known that 1, Louis PERCY LINDEN, a subject of the Kin of Great Britain, and resident of London, ringland, have invented certain new and useful Improvements in Advertising Signs, of which the following is a specification.
This invention relates to advertising machines that are mechanically operated in such a manner that the sign or advertisement appears letter by letter in succession and when completed the several letters or signs constituting the advertisement automatically disappear, that is to say, in a similar manner to the well known electric signs that are operated similarly to convey the same idea in darkness by the switching on and off of the lamps. '1
In connection with apparatus of this kind it has already been proposed to assemble the several plates upon which are inscribed the letters, on a common axis so that they can be individually raised to view by the effect of spring urged plungers that are actuated by cams formed on rotating discs within the cabinet so that the letters are raised above the top of the cabinet when the plunger is propelled by the cam and fall back when the cam is out of engagement with the plunger. Likewise in a motor driven vehicle it has been proposed to utilise the motive power of the vehicle to drive a shaft on which are mounted cams or eccentrics which operate vertically disposed rods each of which at its end is provided with a letter or sign that is projected by this means through the roof of the vehicle thus forming a disappearing advertisement. Similarly by means of clockwork and other mechanical power it has been proposed to rotate a shaft carrying cams that engage with bell-crank levers the free end of each of which is attached to a cord that effects a rotatory movement of a ball or sphere that carries the letter or sign which becomes visible through an appropriate orifice in the cabinet containing the entire mechanism and the object of this invention is to simplify the construction of such advertising apparatus and facilitate its general use for which purpose the apparatus according to the present invention comprises a cabinet within which is contained clockwork or other suitable mechanism whereby a longitudinal shaft is rotated continuously, the said shaft having attired thereto suitable cams that operate trip levers or the like that support the several letters which are thereby raised or projected upwards through slots formed in the top of the cabinet. Bythis means any number of letters or signs may be automatically propelled or ejected from the cabinet so as to come into view thereby successively spelling awhole sentence or a trade name of an article which it is desired to exhibit intermittently as an advertisement or announcement.
The cabinet and the entire apparatus constructed in accordance with the present invention forms a concise self-contained article which can be placed in a shop window or show case or on a shop counter, and by the employment of the clock-work mechanism or other motive power and various set-s of letters or signs, different advertisements may be exhibited from time to time by the same machine, the letters or signs being made interchangeable for this purpose.
A mechanically operated advertising apparatus embodying my invention is illustrated in the annexed drawing wherein:
r igure 1. 1s a front elevation of the advertising cabinet.
Figure 2. a sectional elevation as viewed from the rear of the machine with the back removed and Figure 3. a transverse sectional elevation on line w-00 of Figure 2. looking from left to right of that figure.
Similar letters of reference relate to like parts in all the figures of the drawing.
Referring now to the drawing a is the cabinet mounted on the base 6 in which is rotatably supported the drum or cylinder 0 by the bearings (Z in the end 6 of the cabinet (4 and the partition f that forms the space or enclosure 9 for the mechanism by which the apparatus is operated which in the example shown is an electric motor.
The top of the cabinet (0 is provided with a slot h which is preferably metal lined and provided with guides to retain the metal or other suitable slats in their respective positions along the slot it. Each of these slats i has inscribed thereon in any convenient manner a letter as shown in Figure 1. and is provided wit-l1 a slit j with which engages the end is of a trip lever that oscillates on the spindle m, the other end it of the trip lever normally rests against the stop bar 0 when the slat i is invisible, or actuated by one or other of the steps or cams p of the drum or cylinder 0 and when in the tilted position it rests on the periphery thereof until the rotation oi the drum 0 brings the gap g opposite thereto when it falls back against the stop bar 0 and allows the slat i to disappear. lit will be readily understood that the slats i of which the advertisement is composed can be readily removed and replaced so that differentadvertiseinents may be exhibited from time to time by the same machine and obviously av less or greater number can be employed according to require Hi81ltS.'
7 hat I claim is l. A mechanically operated advertising sign comprising a cabinet within which is rotated by any suitable means a cylindrical drum provided with steps that successively engage with trip levers which project slats from the top of the cabinet in such a manner as to mechanically complete the spelling oi the advertisement to be exhibited and means for effecting the disappearance of said from the top of the cabinet in such a manner 7 as to mechanically complete the spelling of the advertisement to be exhibited said cylindrical drurn being provided with a gap to allow of the immediate disappearance of the several slats exhibited.
In testimony whereof I afiix my signature.
OUIS PERCY LINDENv