US1012544A - Bob-sled. - Google Patents

Description

UNITED STATES NELS HALVORSEN, OF EDGERTON, WISCONSIN.

BOB-SLED.

Specification of Letters Patent.

" Patented Dec. 19, 1911.

Application led December 2, 1910` Serial No. 585,322.

To all whom it may concern:

Be it known that I, NELs HALvoRsEN, a citizen of the United States, residing at Edgerton, in the county of Rock and State of Wisconsin, have invented new and useful Improvements in Bob-Sleds, of which the following is a specification.

This invention relates to bob sleds, and its object is to provide an improved con struction of the hound for the front bob, and also provide means for limiting the oscillations of the beam, and thereby preventing it from being split by tripping backward when under load.

In the accompanying drawing, Figure 1 is a perspective view of my improved bob sled. Fig. 2 is a side elevation of a portion of the same, showing the knee in section. Fig. 3 is a transverse section of the joint at the knee, and Fig. 4 is a top plan view, partly broken away of the connection between the balancing bar and the roller to which the pole is fastened.

The sled comprises two runners 1 having the upwardly curved front ends 2 in which is journaled the roller 3 to which the heel of the pole 4 is fastened. This end of the pole rests upon the roller, and is secured thereto by a strap 5 of metal which passes over the pole land has downwardly bent ends 6 provided with flanges 7 bolted to the roller. One or more bolts 8 pass through the upper part of the strap and the pole. Braces 9 extend diagonally from the sides of the pole to the ends of the roller. A clevis 10 on top of the pole affords means for attaching the whitlletree. A knee 11 is erected on each runner consisting of an inverted U-shaped metal stri having a rounded upper end 12 which ts into arecess in the under side of the beam 13. A metal wear plate 14 protects the beam, and the parts are kept in engagement by a U-shaped clip 15 which passes through the bight of the knee and up throughthe beam, being secured by the nuts 16. On the upper side of the beam is placed the hound, composed of four strai ht bars 17 with their meeting ends mortise or otherwise jointed together and secured by bolts 18 to form a s uarecornered frame. A bolt 19 at the mid le of the two side bars passes through t-he beam and fastens the hound thereto. The side bars are furthermore provided with braces consisting of straps o metal 2O which run down under the beam and are secured thereto, preferably by the bolts 19. The upper faces of the bars 17 are provided with metal facings or wear strips 21.

At the center of the beam is a block 22 carrying the metal bolster plate 23, on which rests the bolster 24. A king bolt runs down through the bolster and bolster plate and beam, and permits the bolster to swivel thereon, as usual. The bolster plate extends in front of and behind the block 22, and under the front extension is secured the block 25. The balancing bar 26 is fastened to the under side of the block 25 and runs forward under the front cross bar 17 of the hounds, to which it is also secured by the bolt 27. The forward end of the balancing bar is provided with one or more tongues 28, preferably two in number, one on each side. These project forward into loops on the roller, preferably formed by spaces left for them between the sides of the pole and the side portions 6 of the strap 5, which do not fit against the sides of the pole, but stand a little away from it, as shown in Fig. 4. There is play enough between the tongues and the strap to permit the pole to pivot freely on the journals` of the roller, but the balancing bar is limited in its up and down movements sufficiently to keep the beam always substantially level. This prevents it from being tipped over backward by a heavy load, and thus prevents the king bolt from bending or splitting the beam or bolster. A source of frequent trouble is thus entirely done away with.

The square-cornered hound is cheap and simple in construction and by my construction it is quite as strong and serviceable as those heretofore made of bent pieces.

While I have shown and described the balancing bar in connection with a square hound, yet it is evident that the shape of the hound is immaterial, and that the balancing bar can be used equally well with a hound that is circular, or of any desired shape.

Having thus described my invention, what I claim is 1. The combination with the pole and the beam of a bob sled, of a hound composed of straight side bars resting on said beam, cross bars jointed to the ends of said bars, braces running from the ends of said bars down under said beam, through bolts fastening said side bars, beam and braces togelher a bolster plate secured to said beam, and :i balnneinfr bar connected with the un der side of saic plate and the under side of the front cross bnr, and adapted to engage loosely with the heel of the pole.

2. The Combination with a bob' sled having a bolster plate, a hound and a roller, of a balancing bar secured to said bolster pluie :1nd hound and provided at its frontencl with one or more tongues; a pole fas tened to said roller, and a strap passing over said pole bent downwardly on each side thereof sind secured lo the roller forming loops at each side of the pole in which said tongues can engage wlth a certain amount; of vertical play.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

NELS HALVORSEN.

lVitnesses VIoLE'rrr. TnlcvowAn, ADA HALvonsEN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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