Title:
Bicycle frame or the like
United States Patent 2132317


Abstract:
This invention relates to a bicycle frame or the like. .An object of the invention is to provide a bicycle frame of sturdy construction well adapted -: to withstand the shocks to which such a frame is likely to be subjected. A further object is to provide a bicycle frame which will absorb...



Inventors:
Pease, Earl E.
Application Number:
US8177636A
Publication Date:
10/04/1938
Filing Date:
05/25/1936
Assignee:
BATTERY PATENTS CORP
Primary Class:
Other Classes:
D12/111
International Classes:
B62K25/04
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Description:

This invention relates to a bicycle frame or the like.

.An object of the invention is to provide a bicycle frame of sturdy construction well adapted -: to withstand the shocks to which such a frame is likely to be subjected. A further object is to provide a bicycle frame which will absorb road shocks and yield greater comfort to the rider of the bicycle. Other objects and advantages will 10- appear as the specification proceeds.

The invention is illustrated in its preferred embodiment by the accompanying drawings in which-Figure 1 is a side view in elevation of a bicycle 1;: frame embodying my invention; Figure 2, a plan view of the bicycle frame; Figure 3, a sectional view as seen from line 3 of Figure 1; Figure 4, a detail view partly in section showing the spring connecting the rear wheel shaft support to the hanger member, the section being taken as along line 4 of Figure 3; Figure 5, a fragmentary sectional view showing the cluster casting, the section being taken along line 5 of Figure 1; and Figure 6, a fragmentary sectional view showing the frame cross support, the section being taken along line 6 of Figure 1.

In the illustrations A designates a rear wheel shaft support; B, the top tube members; and C, suitable connecting members for joining the tubes and supports.

The connecting members C include a head 10 which receives the steering shaft, a cluster member iI which holds the seat post, and a hanger 12 which provides a bearing for the drive axle. Preferably these members are cast of some light strong metal such as aluminum alloy.

The rear wheel shaft support A is fastened at one end to the hanger casting 12 by means of a spring 13, and is provided at its rearward end with the supporting heads 14. Spring 13, as herein shown, is a laminated type spring, the laminations being discontinuous and secured together by a central bolt 15. One end of the spring is secured within ears 16 projecting on the rear side of the hanger casting by a bolt 17, and the other end is secured within ears 18 on the U-shaped piece 19 by bolts 20. At the end of each leg of piece 19 are the heads 14 which are of well known construction, being equipped with a slot and screw for mounting on the rear wheel shaft. On top of heads 14 are the slight extensions 14a providing means for pivotal attachment to frame members.

Connecting hanger casting 12 with head casting 10 is a front supporting tube 21, and con, necting hanger casting 12 with cluster casting I I is a seat supporting tube 22. Members 10, 11, and 12 are adapted to receive the ends of these tubes and the joints are formed in well known manner.

The. top tube members B include a curved tube 23 having its ends secured in castings 10 and 11, and the curved tube members 24 and 25.

Curved tube members 24 and 25 have their foremost ends secured side by side at an even level jn the top portion of head casting 10. From casting 10 tubes 24 and 25 follow a slightly upward direction and begin to diverge somewhat.

They reach the highest point of curvature and begin a slightly downward course at a point forward of the cluster casting, but continue their slight divergence. At the cluster casting tubes 24 and 25 proceed through the slotted arms of this casting and continue to diverge with only very slight downward curvature. At a point to the rear of head 14 tubes 24 and 25 are given greater downward curvature and their ends turned forward to form loops 26 and 27, as shown by Figure 1. The ends of the tubes are flattened and adapted to be attached to heads 14 by bolts 28 to form pivoted joints. 253 To the rear of cluster casting I and attached to each of tubes 24 and 25 is the cross support 29, which consists of a metal piece 30 having arms 31 adapted to fit over tubes 24 and 25, and a bottom piece 32 fastened to piece 30 by screws 3o 33 and adapted to clamp tubes 24 and 25 within arms 31.

Below the front portion of tube members 24 and 25 is the single tube 23. This tube connects the lower part of castings 10 and II and has the same vertical curvature as does tubes 24 and 25.

To accommodate the unusual arrangement of the top tube members cluster casting 11 is provided at its top portion with the laterally extending arms 32 shown more clearly in Figure 5 of the drawings. Near the ends of arms 32 are circular openings 33 having a diameter equivalent to that of the tubes 24 and 25. Between openings 33 is a horizontal slot 34, and extending perpendicularly to slot 33 are bolts 35 which When tightened tend to tightly secure the tubes 24 and 25 in the casting. At the rear side of casting I a central slot 36 extends downwardly from slot 34, and ears 37 at the sides of the slot receive a bolt 38 which when tightened securely 0O clamps a seat post within the casting.

In the operation of my bicycle frame I find that most of the usual road shocks ordinarily transmitted through the rear axle to the frame are absorbed in my improved frame structure. When the rear wheel strikes a bump, or whenever a shock is transmitted to head 14, spring 13 yields to allow part of the shock to waste itself.

The yielding of spring 13 allows head 14 to turn somewhat and if head 14 were rigidly connected to some member joining with the cluster casting this turning would itself impart a shock to the rider. To overcome this I attach tubes 24 and 25 to the head 14 at pivoted joints. By this construction the operation of the spring is not impeded, and shock due to its action is prevented.

Such construction also operates to eliminate a large part of the shock in a direction upward from the pivot at head 14. The long sweeping curves of tube members 24 and 25, which end in the loops 26 and 27, lend resilience to these members, and though strong and sturdy in construction these members will yield to take up most of this vertical shock.

Another advantage in such construction is in the increased strength provided. The curved top tube members extending in one piece from the head casting to the rear wheel shaft support present a much stronger structure than the ordinary type in which one member connects the rear wheel shaft support to the cluster casting arid another connects the cluster casting to the head casting. Also the divergence of the curved tube members lends strength by increasing their moment in resistance of strain.

While in the foregoing illustrated description I have set forth a specific preferred structure, it will be understood that considerable variation may be made in the details of construction without departing from the spirit of my invention.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible, in view of the prior art.

I claim: 1. A bicycle frame comprising: head, cluster and hanger members; a rear wheel shaft support; tubes connecting said members and said support, said tubes including a pair of tubes connected at one end to said head member and pivotally connected at their other end to said rear wheel shaft support, said pair of tubes being secured to said cluster member.

2. A bicycle frame comprising: head, cluster and hanger members; a rear wheel shaft support; and tubes connecting said members and said support, said tubes including a pair of curved tubes extending from said head member to a point rearward of said rear wheel shaft support, the rear end of said curved tubes being turned forward and pivotally attached to said rear wheel shaft support, said curved tubes being secured at their middle portion to said cluster member.

3. A bicycle frame comprising: head, cluster and hanger members; a rear wheel shaft support; tubes connecting said members and said support, said tubes including a tube secured to said cluster member and pivotally attached to said rear wheel shaft support; and a spring connecting said rear wheel shaft support with said hanger member.

4. A bicycle frame comprising; head, cluster and hanger members; a rear wheel shaft support; and tubes connecting said members and said support, said tubes including a rearwardly diverging pair of tubes secured at their one end to said head member and pivotally secured at their other end to said rear wheel shaft support.

5. A bicycle frame comprising: head, cluster and hanger members; a rear wheel shaft support; and tubes connecting said members and said support, said tubes including a pair of curved tubes secured in the top portions of said head and cluster members and pivotally connected to said rear wheel shaft support, and including also a curved tube having its ends secured in the lower portions of said head and cluster members.

6. A bicycle frame comprising: head, cluster and hanger members, said cluster member being equipped with arms having openings therein; a rear wheel shaft support; and tubes connecting said members and said support, said tubes including a pair of rearwardly diverging tubes secured at their foremost ends to said head member and at their central portion within the arms of said cluster member, the lower ends of said diverging tubes being curved forwardly to form a spring loop, said lower ends being pivotally attached to said rear wheel shaft support.

7. A bicycle frame comprising: head, hanger and cluster members; a rear wheel shaft support; tubes connecting said members and said support, said tubes including a pair of rearwardly diverging tubes secured at their foremost ends to said head member and at their central portions to said cluster member, said diverging tubes having a slight arch between said head and cluster members and extending rearward of said cluster members with only slight curvature, said diverging tubes being curved in parabolic fashion at their rear portions and having their ends pivotally connected to said rear wheel shaft support; and a cross support rearward of said cluster member connecting said diverging tubes.

8. A bicycle frame comprising: head, cluster and hanger members; a rear wheel shaft support; tubes connecting said members and said support, said tubes including a pair of rearwardly diverging curved tubes extending from said head member to a point rearward of said shaft support, the rear end of said curved tubes being turned forward and pivotally attached to said shaft support; and a spring connecting said shaft support to said hanger member.

EARL E. PEASE.