US456625A

US456625A - Frederic malfait

Info

Publication number: US456625A
Authority: US
Publication date: 1891-07-28
Anticipated expiration: 1908-07-28

Description

(No Model.) 3 Sheets-Sheet, 1.

F. MALFAIT.

VELOGIPEDE. No. 456,625. Patented July 28, 1891.

3 Sheets-Sheet 2.

(No Model.) 1

F. MALFAIT.

V'ELOGIPEDE. N0. 456,625. Patented July 28-, 1891.

U .9 'Q Q m g u N a v Q Q mm; 1 M.

7 fl wu-mgm 3 Sheets-Sheet 3. 1:". MALFAIT.

VELOOIPEDE (No Model.)

No. 456,625. Patented Jilly 28, 1891.

UNITED STATES PATENT OFFICE.

FREDERIC MALFAI'I, OF PARIS, FRANCE.

VELOCIPEDE.

SPECIFIGATIONforming part of Letters Patent No. 456,625, dated July 28, 1891.

Application filed March 30, 1891- Serial No. 386,941. (No modeh) Patented in France May 5, 1888, No. 190,430-

To all whom it nwy concern:

Be it known that I, FREDERIG MALFAIT, of the city of Paris, France, have invented Improvements in Velocipedes, (for which I have obtained Letters Patent in France for fifteen years, dated May 5, 1888 No. 190,430,) of which the following is a full, clear, and exact description.

My improvements relate more particularly to a tricycle having two front steering-wheels and a rear driving-wheel actuated through connecting-rods and cranks so disposed as to give ease of driving and avoid dead-points.

The particular arrangement and combination of the various parts of the machine are described with reference to the accompanying drawings, forming part of this specification, wherein- Figure 1 represents a side elevation, and Fig. 2 a plan, of the tricycle. Fig. 3 shows a diagram of the treadle motion. Fig. 4 is a detail.

Ct at are the steering-wheels; Z), the driving- Wheels; 0, the frame, and .d (Z the driving- Wheel fork.

e is the driving-wheel axle; f f, the cranks; g g, connecting-rods coupled thereto and respectively coupled to the arms h of rock-levers 'Z, pivoted to the frame at i, the other arms j of said rock-levers being coupled by rods k to the ends of the corresponding treadlelevers Z Z, pivoted at their front ends to a crosshead carried by a forward extension m of the frame a.

In operation the depression of the treadle Z (represented by the full line in Fig. 3) rocks the lever t', causing arm h and connecting-rod g to move backward, turning the crank fin the direction of the arrow until it arrives at the diametrically-opposite point. The other treadle (represented by the dotted line) will then be at its highest position, and will act in its turn to complete the rotation of the driving-wheel b, and so on.

It Will be seen that there is no dead-point, as the treadle mechanism represented in full lines is in its highest position, while the other set (represented in dotted lines) is in its lowest position, which corresponds to its deadpoint; but as at this precise moment the firstmentioned set has already passed its deadpoint it will carry the other set over its deadpoint, and conversely.

The steering-wheels ctare guided in parallel directions by the steering-handle 13, acting through the lever-arm q and couplinglinks 0*, jointed to q or s, and at t to arms on the axes of brackets to, forwardly curved at their lower extremities, to which are jointed forwardly-projecting arms 1*, carried by the steering-wheel axes, which are situated to the rear of the plane of the axes, about which the brackets to pivot, so that as the steeringwheels are guided to right or left the center of gravity will be thrown toward the center of curvature of the track, thus preventing upsetting. To prevent jolting, the joints between u and r are loose and strong springs 00 are introduced between these parts, as shown, so as to maintain their proper relative position while permitting free vertical play of the wheel-axles with regard to brackets it.

Instead of simple foot-boards z for pedals, I may use the ordinary pivoted pedals, as shown in Fig. 4, mounted by a sliding or an oscillating adjustment on the pedal-levers Z, so as to permit of the length of the stroke of the pedals being varied.

I claim- 1. In a velocipede having a central rear drivingwheel, the combination, with said wheel, of the cranks f, connecting-rods g, rock-levers 01, links 70, and treadle-levers Z, the links Z: being flexibly interposed between the leverst' and treadles Z and said treadles being pivoted at their front ends, substantially as herein shown and described.

2. In a velocipede, the herein -described parallel-motion steering-gear, consisting of the parallel steering-wheels having their axes mounted in arms r, that are pivoted to brackets u, Whose vertical pivotal bearings are in a plane in advance of the wheel-axes, so that as the wheels are inclined the center of gravity is thrown toward the center of curvature of the track and upsetting prevented, as specified.

3. In the herein-described parallel steeringgear for velocipedes, the combination, with The foregoing specification of my'improvethe forwardly-curved pivoted brackets u, the ments in velocipedes signed by me this 7th arms 7;, jointed thereto and fixed to the Wheelday of March, 1891.

axles, of the springs 00, applied, as described, FREDERIO M ALFAIT. 5 to maintain the proper relative position of Witnesses:

the parts it and v and afford an elastic snp- ROBT. M. HOOPER,

port, substantially as specified. ALBERT MOREAU.