An Improved Thill Coupling.
Year: 1890

page_text: Date of Application, 26th July, 1590
Complete Specification Left, 23rd Apr., 1891-Accepted, 6th June, 1891
PROVISIONAL DIPUINICATION.
An Improved Thill Coupling.
I, JOHN PITT BAYLY, of 18 Fulham Place, Paddington, in the County of
London, Patent Agent, (a communication to me from abroad by John Schriver, of
York Springs, Bendersville, Pennsylvania, U.S.A. Inventor) do hereby declare the
nature of this invention to be as follows :-
This invention relates to an improved thill-coupling, whereby slackness due to the
wearing of the moveable parts, can be taken up in a neat, simple, and efficacious
manner.
The thill-coupling comprises a clip, having recessed arms for the reception of the
thill, and is provided with a metallic clamp. This clamp is provided with a finger
nut having a serrated portion around its periphery, in which engages the forward
end of a spring pawl, which prevents its unscrewing.
.
By means of this nut any slackness may be taken up at will.
J. P. BAYLY,
Applicant.
COMPLETE SPECIFICATION.
An Improved Thill Coupling.
I, JOHN PITT BAYLY, of 18 Fulham Place, Paddington, in the County of
London, Patent Agent, do hereby declare the nature of this invention (a com-
munication to me from abroad by John Schriver, of York Springs, Pennsyl-
vania, U.SA., Inventor,) and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
My invention pertains to an improvement in thill-couplings; and it consists in
the peculiar construction, combination, and arrangement of parts whereby an
exceedingly efficient and durable thill-coupling is produced, as hereinafter fully
described, and shown in the accompanying drawings, wherein-
Figure 1 is a side elevation of my thill-coupling.
Fig. 2 is a sectional elevation thereof, and
Figs. 3 and 4 are detail views thereof.
Fig. 5 is a detail perspective view of the spring-pawl, parts being broken
away.
In constructing my thill-coupling I provide horizontal bearings consisting of
arms A and concave recesses B, the arms being each integral with the clip, and the
concave recesses B being designed for the reception of a cross-bar C, cast integral
with thill-iron D.
The metallic clamp and nut-holder E is curved at top to conform to the curvature
of the cross-bar C, upon which it is disposed, and in continuation it is inclined
downwardly, projecting through a corresponding orifice in connecting-piece a, and
has integral therewith threaded bolt a', and carries nut d, which latter is provided
with a serrated periphery and also with the finger pieces e for its easy manipulation.
Spring pawlf has its narrow edge aligned with the periphery of nut d, which is
serrated. Spring pawl falso consists of metallic plate g, clipped between the two
pieces h, which latter at either end projects through orifices therein provided, and
is thus secured, the pawl proper consisting of the narrow strip of notched metal, as
aforesaid. Thus constructed as the thill-iron becomes worn it may be readily
tightened by means of nut d, which nut is locked by the pawl tooth j abutting

page_text: against the teeth formed on the nut's periphery, and thus constructed, a highly
efficient and durable thill-coupling is produced.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what I
claim is:
1. A thill-coupling having a nut for tightening the thill as worn, the nut being
prevented from rotating by a pawl, abutting in serrations on the nut's periphery,
substantially as shown and described.
2. The combination of the clip having recessed arms for reception of the thill,
the metallic clamp, and the nut-holder, the serrated nut, and the spring having a
tooth thereon which engages said serrated nut to prevent its rotation, substantially
as shown and described.
3. In a thill-coupling, the metallic clamp and nut-holder for inclasping the cross-
bar of the thill, the nut for rigidly securing the cross-bar in the concave recesses,
and the spring having a tooth thereon serving as a pawl to prevent the rotation of
the serrated ut, substantially as shown and described.
Dated this 23rd day of April 1891
J. P. BAYLY,
Applicant.