Cylinder-Grinding Attachment For Lathes Page: 3 of 4
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UNITED STATES PATENT OFFICE.
WILLIAM T. SNELL, OF EL PASO, TEXAS.
CYLINDER-GRINDING ATTACHMENT FOR LATHES.Specification of Letters Patent.
Patented Apr. 6, 1920.
Application filed January 31, 1919. Serial No. 274,250.
To all whom it may concern:
Be it known that I, WILLIAM T. SNELL, a
citizen of the United States, and a resident
of El Paso, in the county of El Paso and
5 State of Texas, have invented new and use-
ful Improvements in Cylinder-Grinding At-
tachments for Lathes, of which the follow-
ing is a specification.
My invention is an improvement in cylin-
10 der grinding attachments for lathes, and
has for its object to provide mechanism in
connection with a cylinder grinder for per-
mitting the grinding shaft to be set at an
angle to the driving shaft, to provide for
15 grinding cylinders of various sizes, and to
provide mechanism in connection with the
ball bearing mounting of the shaft for com-
pensating for wear.
In the drawings:-
20 Figure 1 is a side view of the improved
grinder in connection with a lathe,
Fig. 2 is a perspective view showing the
grinding shaft and driving shaft separated,
Fig. 3 is a longitudinal section through
25 the grinding shaft and the connection with
the driving shaft,
Fig. 4 is a section on the line 4-4 of
Fig. 1, looking in the direction of the arrows
adjacent to the line, and
30 Figs. 5 and 6 are sections on the lines
5-5, and 6-6, respectively, of Fig. 3, both
views looking in the direction of the arrows
adjacent to the lines.
In the present embodiment of the inven-
35 tion, the grinding shaft 1 is a hollow shell,
having threaded into one end a head 2 to
which the grinding wheel 3 is connected by
a screw 4. The other end of the shaft is
threaded into one of the sections 5 of a
40 housing, the said section having threaded
engagement with the other section 6 which
carries a pulley 7 adapted for engagement
by a belt 8 to rotate the grinding shaft.
A hollow or chambered shaft 9 is jour-
45 naled in the shaft 1, the said shaft extend-
ing through the housing 5-6, and this shaft
9 carries at the housing one of the sections
10 of a ball race, the other section 11 being
carried by the housing, and a series of balls
50 12 is arranged in the race.
A pin 13 is mounted in the chamber of the
shaft 9, and the said pin extends beyond the
outer end of the shaft and is provided with
one of the sections 14 of a ball race, the other
55 section 15 being carried by the shaft 1,and a series of balls 16 is arranged within
the race. This pin is normally pressed out
of the chamber and toward the head 2 by a
coil spring 17, and it will be evident that
under the influence of the spring any wear 60
at the ball bearing 14-15-16 will be com-
pensated for.
Means is provided for lubricating the
spring and the bearing. The said means
comprises passages 18 and 19 in the pin and 65
in the shaft 9, respectively. The passage
19 has a lateral extension 20, through which
the lubricant may be supplied.
The shaft 1 is connected to a fixed shaft
21 by means of an adjustable connection. 70
The said connection comprises disks or
heads 22 and 23 on the shafts 9 and 21, re-
spectively. These disks have threaded en-
gagement with their respective shafts, and
the disk 22 has that face adjacent to the 75
disk 23 beveled in opposite directions from
a diametrical line. The disk 23 has pins 24
on a diametrical line registering with the
line from which the bevel surfaces of the
disk 22 extend, and these pins engage flar- 8o
ing or tapering openings 25 in the disk 22.
The disks are connected by bolts 26 and
nuts 27, and the heads of the bolts are ar-
ranged in countersunk or reamed portions
28 of the disk 22. 85
It will be evident that by loosening the
nut of one bolt and tightening that of the
other the shafts 1 and 9 may be arranged at
an angle with respect to the shaft 21. The
fixed shaft 21 is held in a fixed bearing 29 90
on a lathe 30, and the said shaft is con-
nected to the lathe at 31 by the mechanism
shown in Figs. 3 and 5. The said mecha-
nism comprises a pin 32 arranged diametri-
cally of the shaft, and a plate 33 which has 95
an opening for receiving the shaft and fits
against the pin. This plate is connected by
bolts 34 with the lathe and it has grooves
35 for receiving the end of the pin 32. By
tightening the bolts 34 the shaft 21 may be 100
firmly held to the lathe.
The shaft 1 is, as before stated, driven by
the belt 8, which connects the pulley 7 with
a pulley 35 on a shaft 36 arranged above the
shaft 31 and journaled in suitable bearings 105
37 on the standards 38 connected with the
lathe. This shaft has a pulley 39 which is
connected by a belt 40 with the cone pulley
41 of the lathe. By varying the angle of
the shaft 1 with respect to the shaft 21, the 1101,335,994.
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Snell, William T. Cylinder-Grinding Attachment For Lathes, patent, April 6, 1920; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258667/m1/3/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.