US58402A

US58402A - Improved oar-swivel

Info

Publication number: US58402A
Authority: US
Publication date: 1866-10-02
Anticipated expiration: 1883-10-02

Description

UNITED STATES PATENT OEEToE.

MARTIN FRYER, OF GREENBUSH, NEW YORK.

IMPRovED OAR-SWIVEL.

Specification forming part of Letters Patent No. 58,402, dated October 2, 1866.

.To all whom tt may concern:

Be it known that I, MARTIN FRYER, of Greenbush, Rensselaer county, State of New York,vhave invented a new and Improved Oar- Swivel; and I declare the following specificaapparatus.

The object ot my invention is to make a swivel for oars which will permit and assist the oars to be operated as `with the common rowloek-that is,not simply to be dipped into and lifted from the water in vertical and swept in horizontal lines, which are the only movements that can be accomplished with the common oar-swivel, but to be turned upon its longitudinal aXis,"and thus be adapted to the feathering movement in rowing.

My swivel consists of three parts: the swivel proper, A, constructed precisely like the common oarswivel, as shown in the drawings; a a'v ring, B, swung upon A by pivots a a, so as to revolve freely within it; another ring, O, titted inside of B, so as turn around Vsnugly but freely within it. The oar Dis tltted and secured to this rin n'.

rIhe ring B has cut out from its Lipper surface a slot, I), to receive a pin, c, which is fixed 11pon the inner ring, (l, to regulate its movement within B. rlhis slot is made of the proper length to allow the blade of the oar, when the pin cis at one extremity of the slot, to stand in a proper position for entering the water; and when at the other extremity of the slot to have the proper oblique position in feathering the oar.

It will be seen that, as the movement of ring B upon its pivots gives the necessary rise and fall of the oar, and the movement of the ring C within B all the movement necessary for its proper entrance into and eXit from the water for the i'eathering of the blade, the end I propose is accomplished.

rlhese are some of the advantages in the use ot' this mechanism over the rowlock: It relieves the strain ot' the oar upon the hand at the entrance of the oar and i'or'a considerable part ot' its stroke, for the pin prevents it from turning farther back than its proper position. It prevents the slipping inboard and outboard ot' the oar, which is well known to be a very common and annoying matter with rowlocks and a serious impediment in match rowing. It so regulates the entrance and exit ot' the oar that it cannot enter or leave the water at angles disadvantageous to the proper movements of the oar. It prevents loss of work, jar, and irregularity of movement occasioned by the change of fulcrum for the oar from the front to the back horn of the rowloek upon every change of stroke.

What I claim as my invention, and desire to secure by Letters Patent, is

The combination of the swivel A, with the ring B and its slot b, and the ring 0, with its pin c, operating together in the manner and for the purpose described.

MARTIN FRYER.

Witnesses:

Bron. VARroK DEWITT, J AMES B. SANDERS.