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71 B/ajwAtfrd, 



Specification of Letters Patent No. 19, dated August 31, 1836. 

To all whom, it may concern : 

Be it known that I, Thomas Blanchard, 
late of Springfield, in the county of Hamp- 
den and State of Massachusetts, but now 
5 of the city, county and State of New York, 
have invented, made, and applied to use cer- 
tain new and useful improvements in ma- 
chinery for making ships' tackle and pul- 
ley blocks, which machinery is applicable- 

10 to forming or shaping the sides of blocks 
the shells of which are made in pieces and 
conveniently known as plank or made blocks, 
as distinguishable by such name from com- 
mon or solid shell blocks, and that the said 

15 machinery and the method of constructing 
and using the same are correctly and fully 
set forth and shown in the following de- 
scription and in the drawing annexed to 
and forming a part of this specification, 

20 wherein is shown an orthographical per- 
spective of the machine, Figure 1, in 
which — ■ 

A, A, are two lower bearers, B, B, are 
two short posts, or legs supporting c, c, c, 

25 three pieces forming a frame on which the 
working parts of the machinery! are mounted, 
and which at one end joint into D, D, two 
other standard posts or legs, these are shown 
in the drawing as of wood but may be made 

30 of iron. Between the legs B, B, is fixed 
the swing frame E, mounted on centers, or 
pivots going through the end pieces into 
the frame B, B, and supported by the steady 
frame F, to which it is jointed by the bars 

35 a, a, and ears 5, &, and the direct motion 
of these two frames is given by the crooked 
lever C, whose fulcrum is fixed on the frame 
e, the lever being jointed by the bar d, 
to one side of the frame E. Between the 

40 two upper parts of the frame E, is fixed the 
block e, mounted on centers which come 
through the frame E, and having a wide 
flanch on the end next the lever C. Behind 
this block e is the plate /, and at right angles 

45 to this are the posts or standards h, h, and 
centrically upon the plate / and between the 
standards h, h, is fixed the conical shaft i, 
held in place by bearings g, g, upon the outer 
end of the shaft i, is the forked carriage j, 

50 and between the points of this fork the 
swing center plate K, is mounted on a pivot 
or center at each end centrically in this 
swing center plate is a pair of flanches on 
each edge so. fitted that they stand out at 

55 right angles to, and lengthwise parallel with 
the edges of the plate h. The two adjusting 

plates I I are fitted in the same manner with 
flanges behind them and are mounted on 
the plate k, by screw centers, which go 
through the flanches of the plates I, I, into eo 
the flanches of the plate k, and the distances 
of the ends of the adjusting plates I, I, from 
the face of the plate k, are regulated by 
set screws in the swing plate k. Upon the 
face of the adjusting plates I, I, are fitted 65 
the cheek plates to, m, so fixed by screws 
that they may be removed, and give place 
to larger or smaller plates when needful. 
Each end of the cheek plates M, M, is turned 
up to form a permanent nut through which 70 
four holding screws, n, n, n, n,. are fitted to 
work either with center points or to spur 
plates for the purpose hereafter described. 
The clutch lever o, is mounted in center 
working into a pair of cross arms on the 75 
lever from the standard posts h, h. This 
lever is formed with a T head on the under 
side of which at each end is one of the clutch 
plates p, p, having flanches by which they 
are screwed onto the T head of the lever 80 
through slots in the head which allow of 
these clutch plates being adjusted at any 
required distance from the center of the 
lever o. These parts are shown in ortho- 
graphic projection in a front view, in the 85 
detached Fig. 2, and in a side view in the 
detached Fig. 3, and the same letters of ref- 
erence apply in all the figures. 

The brace r is fixed with, its shaft in a 
wood or metal stock s on the head of the 90 
post or standard t at the side of the cheek 
plates in such a way that the center or nose 
of the brace r is corresponding with and 
fitted to receive the heads of the screw cen- 
ters n, n,.n, n, and turn them in or out of 95 
the nuts on the ends of the plates m, to, upon 
the frame I, I. In front of the last described 
parts are two standards G, G, connected by 
a linthVhead, and between these standards 
the rotary cutter shaft H, is hung on cen- 100 
ters, and has mounted on it four cutter 
stocks q, q, q, q, each having fixed upon it a 
cutter blade with a curved edge, the stock 
and cutters being fixed at right angles to the 
shaft and diagonally to cut at a similar an- 105 
gle to that of a carpenter's plane iron. ■ On 
one end of the cutter shaft H is the drum on 
pulley I, to give a rapid rotary motion to -the 
cutters by a belt, or band from any first 
moving power, and themethod of using this 110 
machine as thus far described, is as follows. 
A piece of plank to form the side of a block 


having been cut into a rough form and 
planed on the part intended to go inside is 
placed by the workmen between the two nuts 
on the ends of the cheek plates m, m, while 
5 the plates are laid horizontally by turning 
the fork j. The workman then enters the 
screw centers n, n, into the ends of the wood 
by the aid of the brace r, then rolls the 
spring and check plates round on the center 

10 in the fork to put a second piece in on the 
opposite side in the same manner. Having 
done this he sets the fork vertically under 
the clutch plates p, p, under the end of the 
lever ; the stop pieces s, s, on the sides of the 

15 fork come against the lever o, preventing 
the apparatus from rolling too far on the 
conical joint i, and the^guide piece t aids in 
bringing down the lever o, so that the clutch 
plates p, p, come tightly down one on each 

20 side over the adjusting plates I, I, and the 
lever having a click stud which takes into 
the ratchet teeth in the vertical spring bar u. 
The workman by lifting the outer end of the 
lever fixes the whole apparatus so firmly that 

25 it can only move toward the cutters on the 
lower center of the swing frame E, with a 
limited motion on the centers of the joint 
block e. In this direction the workman now 
by the lever c, makes the whole approach 

30 the cutters g, q, which are to be in rapid 
rotation, and they will now cut the middle 
part and edge of each wooden cheek piece 
to their own shape as they revolve. The 
form board u, on the nanch of the joint 

35 block e, now comes in contact with the guide 
board w, shown in the detached Fig. 4, and 
the workman depressing the clutch lever o, 
the compound curve formed by moving with 
the edges of the form board and guicleboard 

40 in contact will bring the apparatus and 
wooden checks upward in such a direction 
that the cutters will finish the lower and 
forward quarters of each pair of cheeks in 
the required form. The operation of these 

45 cutters being such that they cut diagonally 
from the grain of the wood operated on so as 
to make a drawing stroke, or cut by which 
the work is at once finished with a smooth 
surface, and by the set screws on the plate 

50 K. The plates I, I, are allowed to be drawn 

in at top by the clutch piates p, p, so as to 
let out the opposite ends of the cheeks for 
the cutters to cut the ends thinner than the 
middle of the cheek, and by these conjoined 
adjustments the cheeks are formed in the 55 
proper curves both transverse and length- 
wise as the same are required to give a fin- 
ished form to the side of the block. The 
workman then withdraws the apparatus from 
the cutters, and disengages the lever 0, from 60 
the ratchet bar v, and raises the clutch plates, 
so as to tarn the cheeks, and apparatus upon 
the center of the swing plate, and present 
the opposite lower quarters of the cheek to 
the cutters, then securing the whole by the 60 
clutch plates, lever, and ratchet bar, he re- 
peats the motion above described, and there- 
by the second lower quarter of the wooden 
cheeks is cut to form. He then withdraws 
as before, and disengages the lever and 70 
clutch plates, and turns the forked carriage 
j end for end on its conical shaft i, and ' 
again repeats the previously described op- 
erations, thereby cutting successively the 
four quarters of each ch'eek into a precisely 75 
similar form. These are then taken out by 
reversing the operation by which they have 
been placed in successively to be formed for 
use in a similar manner. 

And I, the said Thomas Blakchakd, do 80 
hereby declare that I claim as my inven- 
tion — 

1. The application of rotary cutters in the 
form hereinbefore described to the purpose 

of shaping the cheeks of plank blocks. 85 

2. And I also claim as my invention the 
combination of mechanical means for fixing 
and holding block cheeks, and presenting 
the same to the operation of the cutters as 
hereinbefore substantially described and set 90 
forth, by which such cheek pieces are cut 
without being moved from the machine into 
the form and curves required on a cheek 
piece of a finished block. 

In testimony whereof I have hereunto set 95 
my hand August 11th, 1835. 

Witnesses : 

John N. Taylok, 
Jas. H. Sanford.