Improved Picture Frame Oramp for Holding the Corners Securely while Nailing or Glueing.
Year: 1892

page_text: Date of Application, 11th Feb., 1882
Complete Specification Left, 10th Nov., 1892-Accepted, 21st Jan., 1893
TRUVIDIONAL SPECIFICATION.
Improved Picture Frame Oramp for Holding the Corners Securely
while Nailing or Glueing.
WILLIAM PERRY HUMFREY Dove Street Norwich do hereby declare the
nature of this invention to be as follows:-
A machine fitted with solid jaws and worked by an arrangement of levers so as
to get a direct pull upon the corner of frame.
The machine is made of cast iron plate with slot up centre where a movable
triangular block is fixed by means of bolt and thumb nuts, and two diagonal slots
from top corners of plate, to centre slot, causing the two jaws fitted therein to be
pulled by levers at back, or under the plate to come together and hold the two
parts of picture frame firmly.
Dated this 10th day of February 1892
THOMAS HINES.
COMPLETE SPECIFICATION.
Improved Picture Frame Cramp for Holding the Corners Securely
while Nailing or Glueing.
WILLIAM PERRY HUMFREY formerly of 13, Dove Street Market Place
Norwich now residing at St. John's Maddermarket, Norwich in the County of
Norfolk, Mechanic do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
I first cast a flat table or plate, a, a, a, the back of which is recessed, substantially
as shewn in Fig. 1, planed true on the face and pierced by a central slot, b, b,
longitudinally and also by two other slots c, c, one at each corner which are at an
angle of forty-five degrees (45°) to the central slot. The purpose of the central
slot is to guide a movable triangular fence d, d, and keep it true to its position
which should be at an angle of 45° to the slot at its edges as shewn in Fig. 2.
I notch the table, like a rack, on each side of the slot at p, p, p, p, and cast on the
underside of the fence-plate snugs, r, (see Fig. 4) to fall into any of these notches,
and by means of a bolt with a winged nut, m, when the fence is set in any notch,
to tighten it down so that it cannot slide or move, the bolt passing through the
slot and also through another slot in the fence which allows of it being set up to,
or back from, the angle-slots, c, c, but still parallel thereto always. The fence
is serrated on its acting edges to prevent the work slipping. In the angle
slots c, c, I fit slides ff, carrying jaws, e, e, on the table, which jaws are movable
simultaneously and parallel to the serrated edges of the fence. The jaws are
actuated by a screw turning in bearings upon which is fitted a movable nut, g, to
which two connecting-rods are hinged to two separate wings upon it, one at each
side. The nut 9, is drawn forward, or forced backward, accordingly as the screw is
turned to right or left. The further ends of each of these connecting rods k, k,
are hinged to two separate pieces, one a crank-lever, h, the other a short rod, i, as
shewn in Fig. 1, the other end of the rod, i, being attached to the slide,, in the
angle slot carrying the jaws. The lever h, keeps the joint of the hinged rods in
position so that they cannot escape their work but must move the jaws. When
the mitred pieces of moulding or frame are to be cramped together, the jaws are
set to the beginning of their stroke, the fence is set up to the inner edges of the
wood, tightened up, so that the snug falls into one of the notches of the table rack
Price 8d1

page_text: and held by the winged nut, m. By turning the thumb screw, l, the nut, 9, which
traverses the screw is now drawn in that direction which pulls the connecting rods k, k,
so as to actuate the jaws & bring them nearer to the edges of the fence until the
two mitred pieces are cramped-up sufficiently to make a good joint. By reversing
the thumb-screw the jaws open and release the mitred work. Three studs n, n, n
are cast to form feet on underside of the plate u. Fig. 3 is a section on A B
through Fig. 1, which is a plan looking up. Fig. 2, is a plan looking down,
Fig. 4 is a longitudinal section on C. D in Fig. 2. Fig. 5 is a side elevation of the
cramp.
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 :
1. The use of two cramp-jaws movable at right angles to each other when both
are actuated simultaneously by one and the same movement or motion, substantially
as described above, in conjunction with drawings.
2. The use of a lever jointed or hinged to a connecting-rod when its motion is
modified and controlled by a crank-lever hinged to the same joint as described and
shewn in the drawings.
3. The use of a rack or notches in the bed plate into which snugs on underside
of fence fall for the purpose of adjustment to suit different thicknesses or sizes of
stuff as described and shewn in the drawings.
4. The separate or conjoint use of all or any of the above means for cramping
mitre joints of picture or other frames.
Dated this 10th day of November 1892.
JOHN BLACK,
Agent for Applicant.