US1540695A - Oar - Google Patents

Description

June 2, l 925. 1,540,695

J. HOWARD OAR Filed May 5. 1924 3 Sheets-Sheet l June 2, 1925. I 1,540,695 J. G. HOWARD v OAR Filed May 5, 1924 s sheets-sheet ,2

Patented June 2,1925.

UN D- s'rAT-Es Q gonncaoaeanowaan; or m m jmamp;

OAR. f '1 Application filed May 5,

To all whom it may concern:

Be it known that I, JOHN GEORGE .How- ARD, of 56 Victor Road, Andover Road, Holloway, London, N. 7., a subject of the King of England, have invented new and useful Improvements in Oars, of which the iollowing is a specification. 7

i This invention relates to a form of oar for a rowing boat which maybe operated readily by the oarsman when facing in the direction in which the boat is beingrowed.

According to the'present invention an oar comprises a blade portion and a handle portion which are connected so that when the handle is moved forward the blade also moves forward and when the handle is moved backward the blade moves backward. Conveniently the blade and the handle take the form of two interconnected levers pivotally supported by a carrier so as to swung up or down on an axis transverse to the general directionof theoar to'impart rising and dipping movement to the oar. In this way the reaction at the r'owlock, which differs from that of an ordinary oar in that it is mainly a torque between the carrier and the boat, is satisfactorily met by the same means which provide for the-rising and falling of the oar. f It is desirable that feathering should be'providedyfor, but owing to the relative movement of the blade and handle portions,

they are not in linewith one another except momentarily at aparticular position of the oar. To accomplish the end in view the blade and handle may be mounted to rotate about their own. axes in cradles pivoted to the carrier, and the blade and handle may :be interconnected by gearing such, that feathering movelnents'impar-ted to the handle are copied by the blade.f Thesense of the movement should be reversed owing to the reversal of the direction of swing of the blade.

The accompanying drawings illustrate ings" O for the shafts. have toothed segmental portions C C at 1924; Serial no. 711,248,}

iway ofexample constructions according to the invention; 3 7 l Fig. l is a sideelevatiomhalf in section of one construction of oar, the ends'of the handle and bladebeing broken away;

Fig.7 2is a plan of the same partly broken awayto show thegearirig,

Fig. 3 is a side elevation o struction;

Fig is'a vertical section through 'athird construction; l

Fig. 5 .is a detail sideelevation of the frame shown in Fig. 4; and Fig. 6 is a plain of the underside of the same. '7

Figs. '7 and 8 are plan and elevation alternative construction.

Like reference characters parts in all the figures.

of an prises'ia-ihandleportion A in the form'ofga light meta-l shafthavin'g a suitable grip at its free end (not shown), and a bla'depo'r tion B the outer end'ofwhich is flattened and shaped like an ordinary oar. The handleA is'sup-ported in a cradleG and the "Referring to liigs. land 2, ftheoar com f ;anothe1' conindicate like blade B in a similarncradle C, andthe it cradles are'pivoted at C andC respectively on a. carrier D. The cradles G and,

C are light metal frames having cross mem-- bers C which carr y the pivot pins G G and side members which extend from the ends of the cross members on each-side of the shafts Aand Band converge on bear- The cradles also their .adjacentends which intermesh, The handle portion A extends through the cross member 'C ofthe'cradle O and car'riesa mitr'e wheel E located in the space between the segment- C and thejcr'oss member Gt,

The 'mltljf wheel E meshes with a second mitre wheel E5 concentric withthe, pivot pin C spur wheel-E ofthe same ra dius as the segment 'G" isxj onrnalled freely wheel E'. Thus anyrotat-ion of the handle portion A- its cradlewill' be transmitted by the; mitre wheels 1 1E and E i to the spur 'wheel E The wheel E lfwill also rock to and 'fro'" with the'movementsof the; cradle V (Lthe two movements being superimposed;

The blade portion B also'extends throl igh carries "a mitrei wheel 7 E, but this wheel is upon the pivot pin (l and carries the mitre mechanism described to protect it.

located in the side of the cross member C which is remote from the segment C of the cradle. The mitre wheel E meshes with a mitre wheel E* carried upon aspur wheel E of the same radius as the segment 0 The wheel E is jo urna'lledto' turnfreely' upon the pin 0 like the wheel E upon the pin G together and thus any rotation of the handle portion A is reproduced by a corresponding rotation of the blade portion 13. Owing however tothe wheel E being on the opposite side of'the cross member C from the segment c whereas the wheel E is in the same side of its cross member C as the segmentC, the rotation of the blade is reversed a The arm D one plate is received between the arms D of the other and. locked in place. The arms D each carry a'pivot pin-D. The two pivot pins D are in line with one another and their axis is transverse to the general direction of the oar but lies inor parallel to the plane of their movements. The'pivot pins D permit rising and "falling movements of theroar. hen the'oar is in use they are suitably supported by a bracket orrowlock designed to'iit them, which is fixed onto the side of the boat.

The construction illustrated in Fig. 3 is identical with that just described with-f he exception thatthe segment-s C, C are omitted. In this case not only the feather ingjniotion but also the swinging motion is.

transmitted from the handle, to the blade by thespur whecls 1E To do'this the oarsman must hold the handleirom rotation during the swing byhis own muscular force. Figqt shows a constructionidenticalv with that of Figs. 1 and-2 astoits main-working parts. -.The "carrier D however is in this case formed i-n a single piece as shown in detail in -Fi-gs. 5 and 6. .To -ipermit of assembly of the mechanism within the carrier there are remoyable bushes LE to receive .the pins- C C -The distance .sleevesjG which surroundtheglower part of the pins- ,C C belpwthejcradles C C" are split, and either hi- 'iee s a he-b c p sy- If l1ingecl t hey must be provided with some foam Qtt S en he n shown c jgoassemble this construction, the cradle una-ts jar.e. afirst put together with the; spur The spur wheels and E mesh mains to put the that the pin C (foi-"exan1ple) can be en- ,tered in the hole for the bush F while the pin is on the slant as in the drawing, can

be broughtunder the hole for it in the up per plate D next, and can then be passed up through that. plate far enough for the lower end of the pinto be well above the inside otthe plate I). The bush is then put in place, the spur wheelpE' and initre wheel E are positioned below the end of the pinC and the pin .is passed down through thein into the bush. -It only resplit distance sleeve G in place.

fln order to increase the clearance for assembling, the plate D may be hollowed out over the mitre wheel E or E as shown in dotted lines at H in Fig. 5.

The. construction shown in Figs. 7 and 8 is adopted-toavoid making a special con struction for the holes for the pivots. It has the t'urther advantage of being extremely rigid. Thepieces 1 ,1 and L are made preferably in one. the clearance-between lit-and if being slightly less than that shown between the corresponding parts in Figs. 1 and 2. The piece l1. has two slots "Lt at'opposite' ends and on either side of .theslotsis a tapped screw hole 1.

W'ith this construction the vertical members are inserted in their pivot holes at one end and have the pivot pins projecting attheother end through the slots L The parts being thns'asseinbled, an outer plate 0 with two pivot holes 0. and ,tour screw holesP isplaced in position, the positioning of the holes 0 and? being carefully chosen in relation to one another. lVith this construction, this dcvice has all the advantage of a unit construction. it

Having nowparticularly described and ascertained the nature of my said invention and in. what manner the same-is to be performed, I declare that what I claim is I 1. In an; oar the combination of a handleportion, a blade-portion, cradles in which the diandlei and blade portions are carried and rotatably mounted so asto turn about their own axes, ;a carrier upon which the cradles arepivoted so that-handle and blade can swing forwardly and rearwardly, means interconnecting the cradles so that when the handle is swung forward the blade is swung forwardly also, a; toothed gear mounted co- .aXially withlthe pivot of each cradle to irotate relatively thereto sai d gears being operatively connected together, i and vfurther toothed gears connecting each said gear with the handle and blade respectively, substantially as and for the purposegsetforth.

2. In an oar the combinationof ahandleportion, a blade-portion, cradles in which the handle and blade portions are carried and rotatably mounted so as to turn about their own axesya carrier upon which the cradlesare plvoted so that handle and blade can swing forwardly and-rearwardly,f neans interconnecting the cradles so thatwhen the handle is swung forward the blade is swung forwardly also, a toothed gear mounted coaxially-with the pivot of eachcradle to rotate relatively thereto, said gears being operatively connected together, toothed bevel wheels upon each said gear and toothed bevel wheels which mesh with thefirst said bevel wheelsupon the. handle and blade, substantially as and torthe purpose set forth,

31111 an oar the combination of ahandle portion, ablade-portion, a carrier, cradles in the form of cross-members pivoted upon the carrier with stays extending: froin the ends thereof to outer bearings, the handle and blade portions being rotatably supported in the cradles so as to turn about their own .axes in the cross1ne1nbers and the outer bearings, means interconnecting the cradles'so that when the handle is swung forward the blade is swung forwardly also,

a toothedgeardnounted coaxially with the" pivotot each cradlejto rotate relatively thereto, said gears belng operatively connected together, and further toothed gears connecting each said gear with the handle and blade respectively, substantially as and for the purposeset forth." 1

, 4c. In an'oar the combination of a handleportion,blade-portion, a carrier, cradles in the form of cross-members pivoted upon the carrier with'stays extending from the ends thereof to outer bearings, the handle and blade portions being rotatably, supported inthe cradles so as to turn about their own axes in the 'cross-meinbersand the outer bearings, arc-shaped gear-segments support-- ed by the cross-members ofthe cradles and in ineshwith one another so that whenthe handle is swung forward the blade is swung i forwardly also, a toothedgear mounted;co

axially with thepivot of each cradle-to 6 rotate relativelythereto, said gears being operati vely connected together, and further toothed gears connectlng each sald' gear with v the handle and blade respectively, substantially as and for the purpose set forth.

5; In an car the combination of a handle; portion, blade-portion, a carrier, cradles in the form of cross nemberspivoted upon.

the carrier with stays extending from the ported in the cradles'so as to turnabout .ends thereof to outer bearings, the"l1andle V and blade portions being rotatably suptheir own axes inthe cross-members and the outer bearlngs, means interconnect ng the cradles so that whenthehandle is swung forward the blade is swung forwardlyalso, a toothed gear nounted'coaxially with the pivot of each .cradle'to rotate relatively thereto, said gears being operatively con i- 1' nected together, toothed bevel: wheels upon each said gear and toothed bevel wheels which mesh with the first said bevel wheels upon the handle and blade, substantially as and for the purpose set forth.

6. In an oarzthe combination of a handle 7 portion, a blade-portion, a carrier, cradles in the form ofcrossrnernbers plvoted upon the carrier with stays extendlng from the ends thereof to outer bearings, the handleand blade" portions being rotatably: supported inthe cradles so as to turn about their own bearings, portedby the cross-members of'thecradlies and in mesh with one another 1 so that when the handle is swung forward'the blade'is swung'forwardly also, a toothed gear1n1ount 80 axes in the cross-members and theouter arc-shaped gear-segments sup:

ed coaxially with the-pivot oteach' cradle to rotate relatively thereto, said gears being op'eratively'connected together, toothed bevel wheels upon each said gear" and toothed wheels which ineshwith the first saidbevel I tially as and for the purpose set forth.

p In a testimony vwhereof I aflix my signature.

wheels upon the handle and blade,substan was enonen nowARD;

Images