Apparatus for Joining Together the Sides of Picture Frames at Right Angles, and Generally Applicable for Connecting Wooden Bars at a Given Angle to each other.
Year: 1890

page_text: Date of Application, 21st Feb., 1890
Complete Specification Left, 16th Apr., 1690-Accepted, 17th May, 1800
PROVISIONAL SPECIFICATION.
Apparatus for Joining Together the Sides of Picture Frames at
Right Angles, and Generally Applicable for Connecting Wooden
Bars at a Given Angle to each other.
I, EBERHARD SCHIEVENBUSCH, Manufacturer, of Mastrichterstrasse, No. 45,
Cologne, in the German Empire, do hereby declare the nature of my invention to
be as follows:
This invention has for its object to facilitate the manufacture of gilt frames by
providing suitable means for connecting together adjoining sides or bars at right
angles.
The apparatus for this purpose chiefly comprises a rectangular corner piece of metal
which has approximately the shape of an angle iron and may be fixed or form a slide
adapted to be set in motion by turning a screw spindle, this corner piece serving as
an external abutment or rest for the adjoining sides of the frame; a pair of wedge-
shaped steel blades formed on a movable piece situated at the opposite end of the
screw spindle and adapted to be propelled by the same towards the corner piece
mentioned above; and a base plate which forms the necessary bearings for the screw
spindle.
The wooden bars or sides to be joined together are first bevelled off at the ends,
provided with glue and placed against the inside of the rectangular corner piece
mentioned above; subsequently wedge shaped steel blades or points are shifted
against the wooden bars, and fixed in position by a set screw, the screw spindle is
turned, and thereby the two wooden sides or bars of the frame are pressed against
each other. By this operation, the outside of the frame, which is generally gilt or
otherwise decorated, is in no way injured, the steel blades acting only on the inner
faces of the bars.
Dated thia 20th day of Febrno 1890
FAIRFAX & WETTER,
433, Strand, London, Agents.
COMPLETE SPECIFICATION.
Apparatus for Joining Together the Sides of Picture Frames at
Right Angles, and Generally Applicable for Connecting Wooden
Bars at a Given Angle to each other.
I, EBERHARD SCHIEVENBUSCH, Manufacturer, of Mastrichterstrasse, No. 45,
Cologne, in the German Empire, do hereby declare the nature of my invention
and in what manner the same is to be performed, to be particularly described
in and by the following statement :-
This invention has for its principal object, to facilitate the manufacture of gilt
frames by providing suitable means for joining together contiguous sides or bars at
right angles to each other.
The apparatus for this purpose chiefly comprises a base plate A, a screw spindle B,
a movable corner piece or abutment C cut out or shaped so as to form a right angle,
a steel blade D mounted on a tool-holder movable along the base-plate A and fixed in
position by a set screw d. The base-plate has a pair of bearings for the screw
spindle B and a longitudinal slot, through which passes a screw nut secured to the
tool-holder, so that the latter may be drawn forward and backward by turning the
spindle.
In some cases, however, the corner-piece C may be connected with the screw
spindle and adapted to slide on the base-plate A, by the turning of the screw B, while
the tool or tool-holder is rigidly fixed to the plate A.

page_text: In making picture frames by means of this apparatus, the wooden bars to be joined
together are first mitred at the ends or cuts to the required angles, provided with glue
and placed on the base-plate A, so that their outside faces the inside of the corner-
piece C; subsequently the tool-holder is caused to advance against the wooden bars,
by turning the screw-spindle.
By this operation the two pivots or wedge-shaped blades ee of the tool Dare
pressed into the wooden bars and thereby the latter firmly pressed together with their
oblique faces, so as to obtain an exactly rectangular joint.
In the second case, the movable corner-piece or abutment C, together with the
wooden bars, is caused to advance against the stationary tool D, by turning the screw
spindle B.
This apparatus possesses the advantage over ordinary appliances, that it will not in
any way injure the outside of the picture-frame which is generally gilt or otherwise
ornamental. The recesses which the tool cuts into the bars are situated on the inner
side and therefore not visible on the finished frame.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :
Apparatus for joining or glueing together the sides of picture frames or other
wooden bars at a given angle to each other, comprising in its construction a corner
piece or abutment C, a steel blade or tool D provided with wedge-shaped points or
teeth e e, and a screw-spindle B, adapted to propel and press the said blade D against
the corner piece C or vice-versa, substantially as described.
Dated this 16th day of Anril 1800