US621503A - Singletree - Google Patents

Description

. Patented Mar. 2|, |899.

R. R. PIGG.

SINGLETREE.

' (Application med oct. 8, 189e.)

(No Model.)

r 1 l ..."mA` ini. A Y

. UNITED STATES PATENT'l OrricE.

EEUBEN Ross rice, or Mccov, oEEGoN.

SINGLETREE.

SPECIFICATION forming part of Letters Patent No. 621,503, dated March 21, 1899.

Application inea October 8,1888. serrure. 683.028- (Nomodel.)

To all whom it may concern:

Be it known that I, REUBEN ROSS PIGG, a citizen of the United States, residing-at Mc- Coy, in the county of Polk and State of Oregon, have invented'a new and usefulSingletree, of which the following is a specincation.

The invention relates to improvements in singletrees.

The object of the present invention 'is to improve the construction of singletrees and to provide a simple and comparatively inexpensive one adapted to yield to theforward movement or pull of a draft-animal and compensate for the jerking motion ot` a horse, and thereby overcome the irregular and jarring motion of a vehicle.

The invention consists in the construction and novel combination and arrangement of parts, as hereinafter fully described, illustrated in the accompanying drawings, and

pointedvoutvin the claimshereto appended.

In the drawings, Figure 1 is a perspective view of a singletree constructed in accordance with this invention. Fig. 2 is a reverse plan view of the same, partly in section. Fig. 3 is a sectional view taken transversely of the singletree and showing the same applied to the cross-bar of a pair of thills. Fig. 4 is a detail perspective View of one of the plates of the sections of the singletree. Fig. 5 is a sectional view taken longitudinally of the singletree.

Like numerals of reference designate corresponding parts in all the figures of the drawings.

l l designate sections of a singletree provided at their outer ends with means for attaching a pair of traces to them and pivoted at their inner ends within a central sleeve or casing 2, which forms a central section, by means of vertical rivets or bolts 3. These sections 1 ofthe singletree have a limited pivotal movement independent of the sleeve or casing to yield to the irregular motion of a draft-animal and are maintained in the p0- sition illustrated in Fig. 3 of the accompany'- ing drawings, when the singletree is not subjected to strain, by a coiled spring 4, located in rear of the sleeve or casing and connected with a pair of arms 5, extending rearward from the inner ends of the sections 1. When the sections are subjected to a forward strain,

the spring yields and prevents horse motion from being communicated to a vehicle. The arms 5,which are preferably formed integral with plates 6, are provided at their outer edges with shoulders 7, adapted to be engaged by loops 8 of the ends of the spring, whereby the latter is' adapted to be adjusted to and from the outer ends of the arms to regulate its tension.

The plates 6, which are secured to the lower faces of the sections of the singletree, eX- tend beyond the inner ends of the same and project into the sleeve or casing, being adapted to engage the front and rear walls thereof to limit the independent movement of the sections 1. The rear wall of the sleeve or casing is provided at its terminals with slots or recesses, through which project the arms 5 of the plates 6, and the latter are provided with integral spacing-sleeves 6a, receiving the bolts 3, to prevent the same from wearing and to keep the sections 1 of the single= tree from becoming loose. The singletree is mounted on the cross-bar l1 of a pair of thills by a pivot 12 and is supported by a yoke or bracket 13, composed of .upper and lower loops, embracing, respectively, the singletree and the cross-bar. The intermediate arm 14 of the bracket or yoke is interposed between the upper face of the cross-bar and the lower.

face of the sleeve or casing. A The outer ends of the sections 1 may be provided with devices other than those shown for retaining the traces on the singletree, and the plates 6 are preferably provided at their inner ends with lugs 15, located at the opposite edges of the sections. j

The invention has the following advantages: The singletree, which is simple and comparatively inexpensive in construction, possesses the strength and durability of an ordinary whifletree, and it is adapted to cushion a draft-animal and prevent the irregular or jerking motion of the same from being communicated to a vehicle. The tension of the spring maybe readilyregulated, and the improvements are applicable to doubletrees as well as singletrees.

Changes in the form, proportion, and minor details of construction may be resorted to without departing from the spirit or sacriiicing any of the advantages of this invention.

IOO

l. A device of the class described comprising a central section, the Whiffietree-sections pivoted near their inner ends to the central section and arranged to engage the front and back of the same to limit their pivotal movement, and a spring for cushioning the whifiletree-sections, substantially as described.

2. A device of the class described comprising a central sleeve, the sections pivoted Within the sleeve and having their inner ends arranged to engage the Walls thereof, 'whereby their pivotal movement is limited, arms extending from the sections through the rear wall of the sleeve, and a spring connecting the arms, substantially as described.

3. A device of the class described comprising a sleeve or casing, a pair of sections pivotally mounted on the sleeve or casing and having a limited :movement independent of the same, arms extending rearward from the Ytially asdescribed.

In testimony that I claim the foregoing as my own I have hereto afxed my signature in the presence of two Witnesses.

REUBEN ROSS PIGG.

l/Vitnesses:

E. E. HoLooMB, VALLET MACKEN.

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