US 3226173 A
Description (OCR text may contain errors)
s. BETTUZZI 3,226,173
CASE FOR ELECTROMECHANICALLY SHIFTABLE REPRESENTATION Dec. 28, 1965 2 Sheets-Sheet 1 Filed June 1, 1964 M a a m B F/ga INVENTOR.
Dec. 28, 1965 G. BETTUZZI CASE FOR ELECTROMECHANICALLY SHIFTABLE REPRESENTATION Filed June 1, 1964 2 Sheets-Sheet 2 4 INVENTOR GIOWMW/ 55 770221 United States Patent 3,226,173 CASE FOR ELECTROMECHANEQALLY SHIFTABLE REPRESENTATION Giovanni Bettuzzi, Via Trieste 76, Parma, Italy Filed June 1, 1964, Ser. No. 371,851 Claims priority, application Italy, June 5, 1963, 11,645 3 Claims. (Cl. 312-223) This invention relates to a cabinet, adapted to assemble and contain blackboards or panels for didactic use, or other diiferent boards and to permit at the same time to set them well in sight by actuation of suitable servocontrols.
It is a main object of this invention to provide a cabinet case of extremely convenient employ in scholastic rooms in general inasmuch as it is adapted to solve the problem of putting successively in sight wide plane surfaces on which to write or to represent illustrations over a limited area, correctly oriented in the room Without the need of complexed and fatiguing operations or auxiliary equipments.
It is another important object of this invention to provide a cabinet case which, besides aesthetically harmonizing with the room furniture, is such as to preserve the panels such as blackboards, maps or didactic charts, negatoscopes, or others contained therein, from the deterioration which they would be subjected to when permanently exposed to the entire advantage of the life of material itself.
It is still a further object of this invention to provide an apparatus of safe functioning and of extremely convenient and practical use.
It is another object of this invention to provide for the containment of means, adapted for motion picture and diapositive projections.
These and still other objects are attained by the cabinet case for blackboards or diiferent panels for prevalently didactic or informational use according to this invention, which is characterized by the fact that it is substantially constituted of a box-like body with side and back walls and a front wall provided wit-h a window, through which the blackboards or different panels are exposed to sight, part of which at least are mounted sliding over side guides and in rest conditions remain placed, in juxtaposition to one another in preferably substantially vertical planes behind the parapet of said window, said parapet being of a height at least equal to that of the panels in order to mask them, means being also provided for shifting said panels from the rest position to the exposing position and inversely.
Further characteristics and advantages of the invention will become more apparent from the following detailed description of a preferred but non-limiting embodiment of a cabinet case according to this invention, considered in conjunction with the accompanying drawing, in which:
FIG. 1 is a perspective view of the cabinet case;
FIG. 2 is a longitudinal vertical section of the cabinet case;
FIGS. 3 and 4 show in an enlarged scale as compared to the preceding figures, a vertical cross section and a horizcntal longitudinal section, respectively;
FIGS. 5 and 6 illustrate some details of the panel raising system.
Referring now to the above figures, the cabinet case according to this invention is substantially constituted of a parallelypiped-shaped container with quadrangular base having the side panels or flanks 1 and 2 and the back 3 blind, whilst the front 4 shows a window 5 having a length being substantially equal to that of the cabinet.
Underneath said window 5 develops a parapet 6,
Patented Dec. 28, 1965 which is variably decorated in a closely analogous manner to the top structure 7.
inside the flanks 1 and 2 there are arranged vertical guides 8 and 9 (FIG. 4) provided respectively for guidmg the blackboards or other panels 10 and a rolling shutter 11, adapted to close the window 5 when the cabinet is not in use (in the figures have been represented three panels or blackboards 10, but, obviously, they may be provided in any number whatsoever).
The height of the window opening 5 (having a quadrangular shape) is scarcely larger than that of the panels, so that the latter, once they are raised by the devices which will be described farther, appear located in center of the same. Each individual panel 10 is surrounded by preferably a metal frame, mounted sliding into said vertical guides 8. The height of the parapet 6 is slightly larger than that of the panels 10 so as to conceal them from sight in nonuse conditions.
The raise of each of the panels 10 occurs by means of wire ropes 12 (FIGS. 2-5) wound in corresponding grooves of a double pulley 13 (FIG. 6) which is in turn keyed on the shaft of an electric motor 13a with related speed reducer. Each panel is associated with a respective electric motor 13a, related ropes 12 being caused to pass about idle counter pulleys 14 and hence fastened to the ends of the upper edge of the respective panel frame. As clearly illustrated in FIG. 5, the fastening of ropes 12 to the panels occurs by damping means, constituted of a pin 15 terminating on the lower part with a stop nut or a thickening and mounted vertically sliding into a hole provided in the panel frame, against the act on of a spring 16; by such arrangement, shock movements of the panels during the displacing start and stopping stages are avoided.
The electric motors 13a with related pulleys l3, counter pulleys 14 and shutter roller 11 are contained in the top structure 7, whilst, in the path of the panels there are arranged limit microswitches 17, 18 as upper and lower limit switches (FIG. 3).
At the rear side of the cabinet, near the back wall 3, there is arranged a projection screen, constituted of a preferably metal frame 19, inside which a white cloth 21 (FIG. 2) is stretched by means of cord binding 20. The exposure of such a screen is provided by raising same beyond the upper portion of the cabinet, whilst the frame 19 extends along a section 19a underneath the screen proper, so as to keep it in vertical position. In order to allow the screen extraction, the cabinet roof is provided with a corresponding passage slot 22 (FIG. 3), whilst the sliding is ensured by means of vertical guides 23 having a U-shaped structure, fitted inside the flanks 1 and 2.
The screen raising or lowering takes place by means of an analogous system to that associated with panels 19, comprising the ropes 12', wound about a double pulley 13 of an electric motor 13a and passing about idle counter pulleys 14. The fastening of the ropes 12 to the screen occurs at two brackets 24, projecting from and fixed to the lower section 19a of the frame 19 (FIGS. 3-4). Also in this case the cable connection is made by damping means 25 (FIG. 3), and the limit switch stops are controlled by upper and lower limit microswitches 26 and 27 respectively, placed in the path of the projections 24.
The electric motors for lifting the panels and the screen are controlled by a pushbutton battery, placed on a cabit ide, comprising (FIG. 1) the pushbuttons 28 for the ascent, the pushbuttons 29 for the descent and a pushbutton 30 for stopping all moving members in an intermediate position whatsoever. All relays and tele-inverters of the electrical circuit are housed in a box body 31, placed on the cabinet bottom (FIG. 3).
Between the panels 10 and the screen 19 there is arranged a negatoscope 32, fastened to the flanks 1 and 2 at the height of the window 5. The negatoscope 32 is constituted in a well known manner of a box frame, provided on its front side with glass and diffuser 33 and inside with lamps 34 (FIGS. 3 and 4).
From the foregoing the mode of operation of the apparatus will become apparent.
The opening and closing of the rolling shutter 11 is made by hand, whilst the raising and lowering of the panels and screen is automatically operated by acting on the pushbuttons 28 and 29. By pressing these down, in fact, the motors and with them the pulleys 13 and 13' are set in rotation, which by winding or unwinding the cables 12 and 12 in the respective grooves (FIGS. -6) cause the displacement of said members. The stop, provided in a suitable position, occurs upon actuation of the microswitches 17, 18 and 26, 27, set in operation by direct action thereagainst of the frames of panels and brackets 24, respectively. The negatoscope 32 is visible when all panels 10 are in rest position (position illustrated in FIG. 3), whilst the screen is exposed by raising it above the cabinet roof by causing it to pass through the slot 22 (raising of the screen is possible since the ropes 12' are connected to the projections 24, fastened to the lower section 19a of the frame 19).
The cabinet is preferably made out of entirely metal structures, but it is obvious that whatever materials and dimensions could be used depending upon requirements.
The invention is subject to several changes and modifications, all falling within the scope of this invention.
So for example the panel raising and lowering system could be made by means of one single motor acting on one single shaft with which the individual rope winding pulleys could be alternately engaged by a lever system.
Still for example, the negatoscope, instead of being stationary, may be mounted displacing in height with an arrangement similar to that of the panels.
By way of further example, the raising and lowering of panels may be operated by mechanical devices which can be manually actuated from the outside.
What I claim is:
1. A cabinet case for representation panels having two spaced lateral sides, a top side and a bottom side, comprising a box-like body having a top wall, a front wall and a window in said front wall below said top wall, a parapet portion of said front wall below said window, a plurality of juxtaposed vertically movable representation panels within said box-like body below said top wall, guide means for vertically guiding said panels, electromotor driving means for vertically shifting said panels in an upper position thereof below said top wall in front of said window and in a lower position thereof below said window, said parapet portion having a height adapted to conceal said panels when in said lower position thereof, and said window having an area adapted to expose to sight the representation of said panels when in said upper position, a projection screen panel juxtaposed with respect to said representation panels, a slot in said top wall allowing the passage of said projection screen panel through said top wall, further guide means for said projection screen panels for vertically guiding thereof, further electro-motor driving means for' vertically guiding said projection screen panel in an upper position thereof above said top wall and in a lower position thereof below said top wall and switch means for controlling the actuation of the panels.
2. A cabinet case according to claim 1, further comprising a negatoscope mounted in fixed position in said box-like body at the height of said window in front of said projection screen panel and behind the other of said panels.
3. A cabinet case for representation panels having two spaced lateral sides, a top side and a bottom side, comprising a box-like body having a top wall, a front wall and a window in said front wall below said top wall, a a parapet portion of said front wall below said window, a plurality of juxtaposed vertically movable representation panels within said box-like body below said top wall, guide means for vertically guiding said panels, electromotor driving means for vertically shifting said panels in an upper position thereof below said top wall in front of said window and in a lower position thereof below said window, said parapet portion having a height adapted to conceal said panels when in said lower position thereof, and said window having an area adapted to expose to sight the representation of said panels when in said upper position, a projection screen panel juxtaposed with respect to said representation panels, a slot in said top wall allowing the passage of said projection screen panel through said top wall, further guide means for said projection screen panels for vertically guiding thereof, further electro-motor driving means for vertically guiding said projection screen panel in an upper position thereof above said top wall and in a lower position thereof below said top wall and switch means for controlling the actuation of the panels, said electro-motor driving means comprising for each respective panel, an electro-motor within said cabinet below said top wall and above said window, a driving pulley near said electro-motor and driven by said electro-motor, said driving pulley having its axis of rotation perpendicular to said respective panel, said driving pulley having two peripheral grooves thereof, a corresponding idle guiding pulley substantially at the level of said electro-motor and arranged near each side of said cabinet within the interior thereof, first cable means wound about one of said idle pulleys and connected with one end thereof to said respective panel at the top side thereof near one of said lateral sides thereof, said cable being connected with another portion thereof to one of said grooves of said driving pulley, second cable means wound about the other of said idle pulleys and connected with one end thereof to said respective panel at the top side thereof near the other of said lateral sides thereof, said second cable being connected with another portion thereof to the other of said grooves of said driving pulley, a rolling shutter arranged in the rolled-up position thereof above said window and below said top wall near said front wall of the cabinet and adapted to close said window.
References Cited by the Examiner UNITED STATES PATENTS 591,282 10/ 1897 Kunkel 40-65 1,846,649 2/ 1932 McFarland 312-297 X 2,172,956 9/1939 Derman 312-247 X 2,499,791 3/ 1950 Spencer 312-247 X 2,576,888 11/1951 Padgett 312-306 X 2,701,838 2/1955 Loesch 240-2 2,889,442 6/1959 Schultz 312-247 X FRANK B. SHERRY, Primary Examiner. CHANCELLOR E. HARRIS, Examiner.