Year: 1897

page_text: Date of Application, 3rd Sept., 1897-Accepted, 9th Oct., 1897
I, ISAAC HOSIER, Farmer, of Philmont, in the County of Columbia, and State
of New York, one of the United States of America, 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:-
This invention relates to improvements in nut locks and has for its object the
production of a lock which will prevent the rotation and consequent detachment
of a nut incident to the vibration of a bolt when applied, as in railroad or bridge
constructions. To the accomplishment of this object my invention consists in
providing a spring metal plate provided with a bolt aperture and with a hinged
locking plate provided with a nut aperture and composed of a pair of hinged
sections, one of which is designed to engage a locking flange carried by the
extremity of the spring plate opposite its hinged connection with the locking
plate.
In the accompanying drawings,
Figure 1 is a general view showing my nut lock in use.
Figure 2 is a detail view showing the device in the position it assumes while
the nut is being screwed in place.
Figure 3 is a similar view of the device in locked position, and
Figure 4 is a central longitudinal section of the subject matter of Figure 3.
Referring to the numerals of the drawings 1 indicates a spring metal plate of
any suitable material preferably curved longitudinally and provided with a bolt
aperture 2. 3 indicates a locking plate hinged at one end to the spring plate 1
and composed of two sections 4 and 5 hinged together as by a pintle 6, the
section 4 being formed with a rectangular or other shaped nut aperture 7
designed to receive the nut 8 screwed upon the bolt 9. 10 indicates a flange formed
at the extremity of the plate 1 opposite the connection of said plate with the
locking plate 3 and under which the free edge 11 of the section 5 of the locking
plate is designed to extend when the device is in a locked position.
In operation, the plate 1 is placed against the fish plate or other part through
which the bolt is designed to pass and the threaded extremity of the bolt extends
through the bolt aperture 2. The nut is then screwed upon the bolt until it
impinges against the face of the plate 1, with sufficient force to be resisted to a
sufficient degree by the resiliency of said plate, which as has been stated is
normally somewhat curved longitudinally. The locking plate is then turned
down upon the nut which passes through the nut aperture therein and the edge of
the swinging section 5 of the nut lock plate is inserted under the flange 11 upon
the extremity of the plate 1. Slight pressure upon the nut lock plate at or
adjacent to the pintle 6 will cause the axis of the hinge connection between the
two sections of the locking plate to drop below the plane of the opposite ends of
the spring plate 1, and as will be apparent, the outward movement of the locking
plate which would remove it from contact with the nut, will be prevented by the
pressure exerted by the spring plate 1 and the parts will be retained in their proper
positions to prevent the displacement of the nut. When it is desired to remove

page_text: the lock it is simply necessary to swing the locking plate outward against the
resistance of the plate 1 and the nut can then be removed in the usual manner.
While the construction illustrated and described constitutes a preferable embodi-
ment of my invention, I do not desire to limit myself to such structural details
but reserve the right to change, modify or vary them at will, within the scope of
my invention.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. In a nut lock, the combination with a spring plate curved longitudinally and
provided with a bolt aperture and with a flange at one end, of a locking plate
composed of a pair of jointed sections hinged to said spring plate, substantially
as described.
2. In a nut lock, the combination with a spring plate provided with a bolt
aperture and with an inturned flange extending across one end thereof, of a
locking plate provided with a nut aperture coincident with the bolt aperture in
the spring plate, said locking plate being composed of a pair of jointed sections
one of said sections being hinged to the end of the spring plate opposite the flange
and the free end of the other section of the locking plate being designed to engage
said flange, substantially as described.
Dated this 2nd day of September 1897
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent.