Woodworking – Shaping machine – Pattern
Patent
1981-01-28
1984-07-10
Husar, Francis S.
Woodworking
Shaping machine
Pattern
108 92, 108 96, 409110, B23Q 3510, B27C 506
Patent
active
044587368
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to an improved sign routing machine.
Sign routing machines are used for transferring characters from a template surface to a workpiece surface. A typical sign routing machine is described in Australian Pat. No. 426,248 wherein a link arm is used to transfer the characters from the template surface to the workpiece surface. The link arm has a pivot point around which it is adapted to rotate in the plane of the workpiece surface, means for engaging the characters on the template surface and also means for treating the workpiece so as to inscribe the desired characters thereon.
This particular machine is somewhat limited in its operation because the template surface was essentially on the same plane as the workpiece surface. This also meant that the workpiece usually had to be elevated to the height of the template surface and this was relatively difficult if the workpiece was heavy or cumbersome.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a sign routing machine which alleviates the abovementioned disadvantages associated with the prior art.
The sign routing machine of the invention includes:
a template shaving a surface with indicia inscribed or otherwise formed thereon;
template supporting means;
a link member interconnecting the template surface to a workpiece surface having:
(i) routing means for engaging the workpiece surface;
(ii) means for engaging the indicia of the template surface;
(iii) and pivotal attachment means to said template surface whereby said link member may be pivoted relative thereto and a mounting frame for said link member whereby the link member is movable in an upward or downward direction relative to said frame so as to treat the workpiece surface at a plurality of different heights relative to the template surface.
The template may comprise the top surface of a bench or table. Preferably however the template is an elongate sheet or board having indicia formed on the top surface thereof which is secured to a bench or table which constitutes a preferred template supporting means. Suitable retaining means may be provided for this purpose.
In one form there may be provided a rear mounting strip which is movable in guide tracks located at each end of the template table. In this embodiment the rear strip may be resiliently attached to the table such as by springs which are attached to the rear strip and also to the table. The rear strip when attached to the table in this manner when moved rearwardly is urged towards the front of the table.
There also may be provided a release arm for releasing the template when required. This may comprise a lever attached to the front of the table which engages with a turnbuckle under the table which in turn is attached to a cable which passes underneath the table and then through a slot in the table on the rear side of the rear mounting strip to engage with said strip. Upon actuation of the lever at the front of the table the operator may readily adjust the location of the template when required by turning the lever which by the action of the cable pulls the rear mounting strip rearwardly against the bias of the retaining springs to release the template.
The table may also include an elongate groove which may suitably be located in the front mounting strip. The front mounting strip may be omitted if required and replaced by an elongate track which is fixed to the table. The track may have a lateral extension which extends beyond one side of the template table.
The link member may have a top end section which is conveniently a triangular frame with one corner of the frame having a locating pin which extends downwardly therefrom to engage with the grooves formed by the indicia on the template. This constitutes one example of a suitable means for engaging with the indicia of the template. Another corner of the frame may have a pivot pin extending downwardly therefrom which engages with the abovementioned elongate groove. This arrangement constitutes one example of the aforesa
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Husar Francis S.
Katz Steven B.
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