CHARLES K. MARSHALL, OF NEW ORLEANS, LOUISIANA.
etters PatentNo. 103,636, dated May 3l, 1870.
IMPROVEMENT IN' CART-SADDLES.
The Schedule referred to in these Letters Patentand making part of the same.
To all whom it may concern:
Beit known that I. CHARLES K. MARSHALL, of New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Adjustable Work-Saddles; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon making4 part of this specication, in which- Figure lisa side view of my improved saddle, shov'ing themeans whereby its adjustability is regulate Figure 2 is a horizontal sectional view through the center' of the saddle, and showing the anti-friction bosses.
Figure 3 is a face view of the pads.
The object of my invention is to finnish for the cart and dray-horse an adjustable work-saddle, one in which the pads can conveniently be brought and securely held at any desired point, so as to readily eonforlnlo and t the animals back, no matter what the contour of the same may be.
My improvement also consists in providing the bridge with bosses, whereby the excessive friction, caused by the chain, is obviated.
The nature of my invention consists in attaching the pads to the bridge by a hinge joint. These pads may be grooved for the purposes of ventilation, as stated in my former application, andare provided with semicrcular slotted bearing plates. Through the slot of said plates, and also through the bridge, passes a bolt, which is fastened by a screw-nut on the opposite side.
My invention alsoconsists in providing the bridge with bosses, one of which is placed at thecenter, and one at each end of the bridge, and on the base of the groove in whieh the chain works. r1`he chain works alone on the bosses, and, consequently, there can'only be friction between the saddle and chain at these points of contact, which must necessarily be much less than when the chain works directly in the groove of the bridge, as is'the case with the saddle now in general use.
To enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.
A isthe ordinary grooved bridge, and is of'iron.
B B are the pads, and are to be also of iron, or other hard unyielding substance.
These pads may be grooved, for the purposes of' ventilation, as stated in my former application, and as shown at z, fig. 3.
The bridge A and pads B B are connected by a hingejoint, b l).
C C are the' slotted metallic bearing-plates.
Through the slots c c of -these plates, and also through the upper section, a a, of the ears of the bridge, pass the`bolts C C'.
rlhese bolts are fastened by nuts, and by means of which the pads can be adjusted, and securely retained or locked at any desired point simply by tightening the nuts.
D D are circular metallic anti-friction bosses, and may be cast with the bridge, or otherwise attached thereto; These bosses are on t-he base of the groove iu-which the chain works, and are situated at the center and extreme ends of the same.
The great advantage of these bosses is found in the fact that they do away with that excessive friction which is experienced in the use of the present saddle.
It will be observed that the chain only rests on the center of the arch of the boss, and, consequently, all the friction incident to the use of my saddle, arises from the contact between the bosses and chain at these points, while, in the present saddle, the chain rests immediately in the groove, the entire base surface of the same being exposed to its frictional contact. The saddle thus described is exceedingly cheap and durable, as it may be made entirely of iron.
AHaving thus fully described my invention,
What I claim therein as new, and desire to secure by Letters Patentlof the United States, is-
1. The pads B B, when they are attached to the bridge A by means of the slotted plates C C, the same being held by means of bolts C Cand nuts, whereby they can be adjusted and held at any desired point, substantially as described;
2.l 1he bosses D D, when construced and arranged as described, so as to relieve the base of the groove in which the chain works of all undue friction, substantially as described.
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
C. K. MARSHALL. Witnesses:
EDWIN J AMES, Hormon BROWN.