AN IMPROVEMENT ON HORSE CAR POLE ATTACHMENTS
Year: 1877

page_text: LETTERS PATENT to Samuel Atwood Otis, of Boston, in the County of Suffolk,
in the State of Massachusetts, in the United States of America, for the
Invention of "AN IMPROVEMENT ON HORSE CAR POLE ATTACHMENTS."
Sealed the 8th June 1877, and dated the 12th April 1877.
COMPLETE SPECIFICATION filed by the said Sanuel Atwood Otis at the
Office of the Commissioners of Patents on the 12th April 1877.
SAMUEL ATWOOD OTIS, of Boston, in the County of Suffolk, in the State of
Massachusetts, in the United States of America. "AN IMPROVEMENT ON HORSE
CAR POLE ATTACHMENTS."
The nature of my Invention consists in combining with the pin of a draw bar of
horse cars and other vehicles a hook or hooks which connect with the draw bar in
such a manner as to prevent the pin from being accidentilly displaced.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a perspective view showing my Invention in connection with a portion
of the draw bar.
Figure 2 is an elevation of the pin and hook showing the swivel by which the
hook is connected to the pin in section.
Figure 3 is a plan showing the top of the pin, the swivel, and the hook.
Figure 4 is a section of a modified form of my Invention.
A, Figure 1, represents a part of a draw bar, which may be made in the ordinary
manner; B, Figures 1 and 2, is the coupling pin, which has at its top a projecting
spindle or start M. Upon this start M I hang the swivel C, and fasten the same
by the nut E, or by any other convenient device. To the swivel C, which is free to
turn on the start M, I hang the swinging hook D by the pin P. This hook D has
a point K at its lower end, as shown in Figures 1 and 2, so that when the hook
bangs in the position shown in Figures 1 and 2 the point K passes beneath
the lower side of the draw bar and prevents the pin from being thrown up out
of the draw bar by the action of the pole or whiffletree on the pin or by jolt of
the car.

page_text: When it is desirable to draw the pin I have only to take hold of the chain H and
pull it upward. This action will first cause the hook D to swing outwardly, so
that the point K will clear the draw bar and then will lift the pin B out of the
draw bar, thus freeing the pole from the car. By having the hook Dattached to
the pin B by a swiveling joint-peice C, I prevent any injury to the hook by the
sudden or forcible turning of the pole or link by the horses, for notwithstanding the
pole or link may bind the pin B so hard that it, the pin, cannot turn, yet the hook
is free to swing around by the pole or link, and is therefore not injured or forced
out of place as it might be if it were not free to swing independently of the pin.
In many cases it is not necessary to have the swivel head C, the book D being
attached directly to the start M.
The fastening as above constructed is sure to hold the pin, and cannot be thrown
out of place by the turning of the pole or link.
The second part of my Invention, see Figure 4, relates to another locking device
by means of which I may double-lock the pin; this device is constructed as
follows: Through the center of the pin B I pass a rod K, Figure 4, which has at its
top an eye S to which the chain H' is attached. L, L, L, L, are four toggle peices
united to each other, and at the lower end E to the pin B, as shown. The
upper end of the toggle is united to the lower end of the rod K at N. When the
rod K is in the position represented in Figure 4, then the arms of the toggle
L, L, L, L³, project as shown, so that the pin B cannot come out of the draw bar,
but if the rod K be first drawn up then the toggle L, L', L³, L³, will be drawn
together and thus leave the pin B free to pass through the hole in the draw bar.
Having now described the construction and operation of my Invention, what
I desire to secure by Letters Patent is as follows:-
Claim 1st. The combination of the pin B, hook D, and lifting chain or strap HI,
with the draw bar A, substantially as described and for the purpose set forth.
Claim 2nd. The combination of the pin B, start M, swivel C, and hook D, all
operating together, substantially as described and for the purpose set forth.
Claim 3rd. The combination of the pin B with the toggle L, L, L, L, and rod K,
substantially as described and for the purpose set forth.
In witness whereof, I, the said Samuel Atwood Otis, have hereunto set
my hand and seal, this Twenty-seventh day of March, in the year of
our Lord One thousand eight hundred and seventy-seven.
MAAR
AMTN