58 
it will therefore be sufficient to say, that 
the object to be attained by the invention 
is to agitate the cream with more regula- 
rity, less fatigue, and with more effect 
than can be done in the common way. 
——Sa 
MR. ELIHU WHITE'S (THREADNEEDLE- 
STREET,) for a Machine for casting or 
founding Types, &c. 
A frame is constructed of four pieces 
of brass, viz. two side bits, a_head- 
block, aud a heel-block. On the under 
side of each of the side bits 1s secured a 
plate of metal, made to project within 
the square frame; these are called slid- 
ing ways, and are so formed as to extend 
nearly up to the head-block. They sup- 
port a broad plate of metal, called the 
slider plate ; the two ends of which rest 
on the slider ways, and are fitted to slide 
back and forward on the saine. On the 
upper side of this plare, and along the 
edge farthest from the head-block, is 
placed a narrow bar of metal, rising suf- 
ficiently above the plate to form an exact 
surface with the two side bits. Over the 
bar is placed a broad thin bar of metal, 
the ends of which rest on the side bits. 
The sliderplate and bars are screwed to- 
gether. The space between the side bits 
is filed with narrow bits of metal, run- 
‘ning parallel with the side bit. These 
are called the male and female sliders, 
and rest on the slider-plate, and form an 
exact surface with the two side bits. The 
depth of these sliders 1s equal precisely 
to the length of the body of the Jetter to 
be cast in the machine, and the thickness 
of the male sliders is made precisely 
equal to the size of the letter. Exact- 
ness is not necessary in the thickness 
of the female sliders: The ends of the 
sliders furthest from the head-block pass 
under the bar, and each female shder is 
held by a screw, or pin passing through 
the bar and shder, to the slider-plate be- 
low. The female sliders reach trom the 
bar to the head block, when the slider- 
plate is moved forward as far as the ma- 
chinery will admit; but the male sliders, 
altheugh they pass under the bar, do not 
reach it by an inch. In the upper edge 
of each male slider is a stud, or pin, about 
half an inchin height. Across the sliders 
is placed a regulating bar, which is entire 
at its two ends, but open, or perforated, 
-with a long space in the middle, and is 
secured to the two side-bits by screws. 
In the anterior part of the regulating bar 
is placed’a row of adjusting screws, for 
the purpose of stopping the studs of the 
male sliders, each respectively according 
to the face of the letter intended to be cast. 
New Patents lately enrolled. 
fAug. f; 
A large screw, which passes through the. 
head-block, is fastened to a piece by a 
key, and as the slider-plate, and bars, and 
sliders, are all secured together, the whole 
will be made to slide backwards and for- 
wards by turning thescrew. Ifthe screw 
be turned to the right, the whole will be 
carried forward until the studs in the 
male sliders come in contact with the 
front of the regulating bar, or the screws 
which pass through it, which will prevent 
their reaching the ‘head-block; whereas 
the female sliders having no studs to ob-. 
struct their progress, will be driven home 
against the head-block, by which means 
certain spaces willbe left open along 
the head-block, for the body of the letter; 
and by turning the screw to the left, the 
whole will be drawn back until the studs. 
meet the after half of the regulating bar, 
by which they will be stopped; while the 
female sliders will still move back until 
the letters are quite clear of the sliders, 
so as to fall, or to be taken out. There 
are two wedge-formed pieces fixed in the 
angles between the side pieces of the 
frame and the head-block, which by act- 
ing against the outer female sliders at the 
end of the rim, do cause the whole set of 
sliders to apply themselves firmly against 
each other, and render the spaces or ca- 
vities more perfect and fit to receive the 
metal. Or the etiect of the wedge-pieces 
may be produced by springs, or any other 
proper mode of re-acnion. To the outer 
and lower edge of the head-block is fixed 
a broad bar of metal, moveable on a 
hinge or joints; the pins, axes, or pivots 
of which are parallel to the edge. This 
is denominated the wiatrix-bar, and is 
something wider than the head-block, 
and in, or upon the face of the matrix- 
bar is a wide groove, into which is fitted 
a metallic box, capable of holding as 
many matrices as the machine wiil cast 
Jetters' at a single east. The matriees 
are secured in the box by wedges oF 
screws, and when letters are to be east 
the bar containing the matrix-box is 
pressed up to the under part or face of 
the head-block and sliders, and will then 
bring their matrices exactly under the ~ 
spaces kept open by the shders of the 
body of the letters, and ready to receive 
the metal when poured thereia. - On the 
upper side of the head-block, and in a 
Ime with its inner face is secured a 
square bar of metal, forming one half of a 
Kind of trough to receive and conduct 
the metal to the spaces. The other half 
of the said trough hes across the ends of 
the sliders, and'is connected at the two ex- 
tremities to two bars or guides, which are 
; ited 
