US1101764A - Adjustable means for regulating the tension of the spring-frames for motor-cycles. - Google Patents

Description

G. G. STEPHENSON.

ADJUSTABLE MEANS FOR REGULATING THE TENSION OF THE SPRING FRAMES FOR MOTOR UYGLES.

APPLICATION FILED SEPT. 30, 1912.

1,101,764. Patented June 30,1914.

I 314/012 *Wroz @1 y kw 17' STATEES PATENT @FFEQE.

CHARLES G. STEPHENSON, OF DENVER, COLORADO.

ADJUSTABLE MEANS FOR REGULATING THE TENSION 0F TI-IE SPRING FRAIHES FOR MOTOR-CYCLES.

Application filed September 30, 1912.

To all whom it may concern Be it known that 1, CHARLES Gr. STEPHEN- SON, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Adjustable Means for Regulating the Tension ofthe Spring- Frames of MotorCycles; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings and to the characters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in means for regulating the tension of the spring frames of motorcycles, bicycles, or other similar velocipedes.

My present improvement is particularly adapted for use in connection with the spring frame structure disclosed in my previous application, Serial No. 613,557, filed March 10, 1911, in which upper and lower springs are employed. Under some circumstances, as in the case of tandem machines constructed for two riders, the full tension strength of both springs is desirable, but when only a single rider is using the machine the tension of the two springs will be too great, and the jar, or concussion, due to vibration, will be more than is desired. In this event my present improvement is brought into requisition and enables me to virtually throw one spring out of commission, thus making the elasticity or cushion of the frame proper for a single rider.

Having briefly outlined my improved construction, I will proceed to describe the same in detail, reference being made to the accompanying drawing, in which is illustrated an embodiment thereof.

In this drawing: Figure 1 is a side elevation of a machine equipped with my improvement, one of the front wheels being partly broken away. Fig. 2 is a sectional detail view of the rear fork of the machine constructed in accordance with my improvement and showing the upper spring in position for using the full tension thereof, as when the machine is heavily loaded. In this view the parts are shown on a larger scale than in Fig. 1. Fig. 3 is a similar view showing the spring connected in the other Specification of Letters Patent.

Patented June 30, 1914.

Serial No. reacts.

position, or in the position to virtually throw the upper spring out of commission. Fig. 4 is a top plan view of the construction shown in Fi 3, being a view looking in the direction OI arrow l, Fig. 3.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate, in a general way, the frame-work of a motorcycle, the central part 6 of the frame-work being connected with: the rear fork 9 by upper and lower springs 7 and 8, the upper spring leading from the top of the frame structure 6 to the upper extremity of the said fork, while the two members of the spring 8 lead from a joint 10 to the hangers 12 connected with the bearing 13 of the rear axle. The joint 10 provides for movement between the crank hanger ll and the lower fork 15, this movement being regulated and controlled by the two members of the spring 8 the latter being fixedly mounted at their forward extremities upon the frame. When the upper spring 7 is employed, as when the machine is heavily loaded, its rear extremity is connected with the upper end 16 of the rear fork 9 bypassing a bolt 17 through the eye 18 of the spring and through perforations 19 formed in the extremity 16 of the fork, the latter being bifurcated to receive the spring. When it is not desired to employ the tension of the spring 7, the bolt 17 is removed from the perforations 19 and the spring eye 18 and the fork is sprung sufliciently to bring the eye of the spring into register with slots 20 formed in the opposite side walls 21 of the upper extremity 16 of the fork, the said extremity being open in front as shown at 22 to allow the spring to move freely up and down as the bolt vibrates in the slot. From this it will be seen that when the bolt 17 which secures the rear extremity of the spring 7 in place occupies the slots 20, the spring is out of commission. It may, however, be readily shifted from one of these positions to the other, "as will be readily understood.

Having thus described my invention, what I claim is:

1. In a velocipede, a frame, a rear fork pivoted to the frame near its base, a spring secured at its forward end upon the up per part of the frame, and means for connecting the rear extremity of the spring with the top of the said fork, inclnding an element adjustable -to release the tensionof the spring.

necting its opposite extremity with the top of the rear forlg including an element adjnstablefor maintainingor"releas'ing the tension of the spring;

3. 11] a -velocipede, a frame, a rear fork pivotedto the frame near itsbase, a'leaf spring interposed between said frame and the upper extremityof the fork, and means for attaching: the spring to the fork,incl1idingan element to releaseor restorethe tension of the spring.

4. In a velocipede, a frame, a rear fork hinged tothe frame, a leaf spring: securely attached at its forward extremity to'the frame, said fork being provided with a slot and a perforation and a bolt adaptedto connect the rear end of the spring with the fork, by passing thronghthespring and perforation or through the spring and slot,

according to whether it is desired to maintain or release the tension of the spring.

5(In a velocipede', a frame, a rear fork hinged to the frame, aleaf springesecurely attached at its forward extremity to the frame, said fork being bifurcated to receive therear extremlty of the spring, the bifur- Gated P tbeing provided with a slot and a perforation'and a bolt mounted in the spring "and adapted to connect the rear end of the spring with the: bifurcated portion ofthe fork by passingi'through the perforation or slot according :towhether' it is desired to maintain or release the tension "of'the spring;

6; In COIDlOiHLItlOIlWl-th the frame of avelo'cipede, a wheel fork,*a pluralityv of'springs' arranged to support' said fork from-the frame, and means :for disconnecting one of said springs from its supporting connection copiesoflthis P 'ent'may Ive obtainedfor five'een'ts each, by addressing the Commission-dr of-tPateirtit wlshiflgtbn 51 a n I

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