Education and demonstration – Fluid flow or wave motion
Patent
1993-04-05
1994-12-13
Hirsch, Paul J.
Education and demonstration
Fluid flow or wave motion
446 89, G09B 900, G09B 1900, G09B 2500
Patent
active
053725085
DESCRIPTION:
BRIEF SUMMARY
SPECIFICATION
The invention concerns a training device for the graphic representation of the fluid processes and functions of fluidics, hydraulics in particular, for basic and advanced training, with an essentially vertically oriented panel, to which fluidics training devices are mounted in a systematic arrangement, with the capability of being jointly made to perform various functional operations, through tubing firmly attached to the panel, by means of manually- or remote controllable directional valves.
A training device of this kind is described in the German Design Patent 88 05 364. In the device shown therein, selected typical fluid devices are attached to the front of the demonstration panel in an arrangement whereby the incoming and outgoing tubes are permanently connected on the back side of the panel in a corresponding pattern. Directional switching being accomplished by controllable shut-off valves also mounted on the back side of the panel. The flow patterns in the tubes corresponding to the functional flow diagrams are intended to be highlighted on the front of the demonstration panel by means of magnetic strips affixed thereon.
With regard to this prior art device, it has the disadvantage that during training or in problem-solving the flow diagrams are intended to be created primarily by means of the addition of the magnetic line symbols, while the carrying out of this flow diagram must be accomplished by operating the corresponding shut-off valves, which creates the problem of a mirror-image transformation of the flow diagram created on the front side of the flow chart panel. This represents some difficulties not merely for the instructor but especially for the trainees. A further disadvantage stems from the fact that in a training session the trainees cannot determine from the front of the panel which functions from the back of the panel are being performed.
An additional disadvantage arises from the fact that the creation of flow diagrams by means of the loose magnetic strips delineating the layout of the tube lines involves additional work and preparation of the instructional setup, and, with frequent use of the demonstration panel in the course of instruction, mistakes due to the strips coming off or being dislocated cannot be ruled out. Moreover, the switch-condition symbols being used are relatively small and are also in constant view on those devices not forming part of a demonstration flow pattern.
The present invention has as its basic objective to improve a training device of this type in such a way that its operation is simplified and the training device can be made to better serve its didactic purpose.
The solution for this objective, including advantageous forms and further developments, is to be found in the content of the patent claims, which follows this specification.
The invention starts with the basic concept that each demonstration device attached to the demonstration panel is coupled to a symbol plate movably affixed to the demonstration panel, with the visible side of the symbol plate showing the flow direction alternatives of the demonstration device, and that the movement of the symbol plate can be converted into the hydraulic impingement on the demonstration device.
Associated with the invention is the advantage that the tubing layout with the integrated demonstration devices are at all times immutably fixed on the front side of the demonstration panel, and are thus in plain view of the trainees in every position. The creation of the hydraulic flow circuit as the objective of the exercise is accomplished by moving the symbol plates, thus creating with the symbol plates a second demonstration plane in relation to the surface of the demonstration panel, so that at any time at least two functions can be demonstrated with one movement of the symbol plate. While on the surface of the demonstration panel the fixed layout of the hydraulic lines is visible, the symbol plate carries that hydraulic flow pattern which is actually being directly selected by the movement of the
REFERENCES:
patent: 3673705 (1972-07-01), Wright et al.
patent: 4080752 (1978-03-01), Burge
patent: 4667427 (1987-05-01), Been
patent: 5178543 (1993-01-01), Semans et al.
Cherichetti Cindy A.
Hirsch Paul J.
Jocke Ralph E.
Parker Hannfin NMF GmbH
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