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Патент USA US3091971

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Filed May 11, 1960
a, ?end/$625M
Patented June 4, 1963
screw 19 is slotted at 19a, protrudes above the bottom
of a recess 23 formed in the top face of closure 20 and is
?tted with a lock nut 24-. The head of screw 19 ?ts
Reinhart Piell, 1137 Maple Ave., Cornwells Heights, Pa.
Filed May 11, 1960, Ser. No. 28,438
2 Claims. (Cl. 73-141)
snugly and rotatably in a bore 25 in the bottom of
closure 20.
As will doubtless be evident, the cell '12 is installed
This invention relates to load cells and, in particular
when the screw 14 is backed off and washer 15 and
to the mounting of a cell in a socket in the top of a
closure 20 are removed from the chock or when the
rolling-mill chock. The invention is an improvement
chock is bodily removed from the mill housing. After
on that of the James E. McNamara application Serial 10 screw 18 has been turned home (by means of a socket
No. 767,603, ?led October 16, 1958, now Patent No.
Wrench), the cell having screws 17 and 17’ threaded
in its upper and lower ends is inserted in bore 111 and
It has been proposed to provide the upper chocks of
closure 20 is set in place. Screw 19 is turned up so that,
rolling mills with load cells by boring a socket in the top
when screws 21 are drawn down tight, it will not engage
thereof and securing a cell therein by a closure ?tted 15 the head of screw ‘17. The lock nut 24 is backed 011
over the socket and secured to the chock. Difficulty has
and screw 19 is turned by the slot in its entering end,
has been experienced, however, in making and maintain
to effect the desired initial or no-load setting of cell 12.
ing the desired preliminary adjustment of the cell when
When this has been effected, lock nut 24 is again tight
so installed. Accordingly, it is the object of my inven
ened. Washer 15 is then replaced and screw v111 is
tion to provide a cell which can be quickly and easily 20 turned down to hold the chock in proper position. The
adjusted to the desired initial condition and is free
working load on the roll journaled in the chock causes
from erratic changes in such adjustment. More speci?
cally, I provide a load cell having self-alining thrust
slight compression of the latter which causes further
deformation of cell 12 and its strain gages, beyond that
bearings at opposite ends and a closure for the cell-re
incident to the inital adjustment. By this means, the
ceiving socket in the chock, having an adjusting screw 25 amount of the rolling load may be determined.
extending upwardly therethrough so as to be accessible
The advantage of my improved load-cell mounting
from the top of the chock.
is that the initial or no-load adjustment may be varied
A complete understanding of the invention may be
‘without removing the cell from the chock, merely by
obtained from the following detailed description and
turning screw 19 with a screw driver. In addition, self
explanation which refer to the accompanying drawing 30 alining bearings B and T prevent any distortion of the cell
illustrating the present preferred embodiment. In the
caused by rnisalinement and insure that it is subject only
drawing, the single FIGURE is a partial vertical section
to axial force.
through a chock having the invention incorporated there
Although I have disclosed herein the preferred embodi
in, taken along the axis of the socket bored into the top
ment of my invention, I intend to cover as well any
35 change or modi?cation therein which may be made with
Referring now in detail to the drawing, the upper
out departing from the spirit and scope of the incention.
portion of a rolling-mill chock 10 has a socket ‘11 bored
I claim:
1. Means for mounting an elongated load cell in a
modate a conventional strain-gage assembly or load cell
socket extending downwardly into the top of a mill-roll
12. Cell '12 has strain gages 12a connected thereto and 40 chock and having a counterbored shoulder adjacent the
leads extend therefrom through a hole in the chock
upper end, comprising a thrust bearing for the lower end
intersecting bore 11. The end of the mill screw for ad
of the cell at the bottom of said socket, a closure for the
justing the chock vertically in the mill housing is indicat
socket seated on said shoulder and lying below the top
ed at 14 and a Washer or bearing block -15 is disposed
of the chock, and a thrust bearing for the upper end of
between it and the chock.
the cell carried by said closure and exposed on its lower
Cell 12 includes a tapped sleeve 16 at each end. Screws
face, said last-mentioned bearing including an adjusting
17 and 17' having spherical convex heads are threaded
screw extending upwardly through the closure so as to be
into the sleeves. The screw 17' in the lower sleeve has
accessible from above the chock.
its head disposed in a spherical concave recess in the
2. Apparatus as de?ned in claim 1, characterized by
downwardly from the top thereof, adapted to accom
head of a screw 18, threaded in a tapped hole 18a at
said screw being a cap screw threaded into a hole in
the bottom of bore 11 and coaxial therewith. Screws
17' and 18 coact to form a self-alim'ng thrust bearing B.
Similarly at the top of cell 12, the head of screw 17 ?ts
said closure from the lower face thereof, whereby the
head of the cap screw applies an initial load to the cell.
in a spherical concave recess in the head of a screw 19
forming a self-alining thrust bearing T.
Screw 19 is threaded into a tapped hole centrally of a
closure or plug 20. The closure is removably secured
in place over bore 11 by screws 21. The lower end of
the plug has a circumferential groove therein provided
with a seal ring 22. The entering end of the shank of 60
References Cited in the ?le of this patent
Lorig et a1. __________ __ Aug. 4,
Ruge ______________ __ Nov. 27,
Seljos et al. __________ __ Mar. 1,
Thurston ____________ __ Nov. 29,
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