He says,"To this end the invention consists in certain improvements in construction of the frame adapted not only to carry the motor in such a way that the center of gravity is near the ground, but to provide a device in which the motor and operating parts are effectually prevented from injury should the machine be overturned or other wise subjected to hard usage."
For over 115 years the bicycle frame has stood the test of time. It has been improved upon as engineers adapted it to new uses by adding a motor but the basic diamond shape is still in use today.
Electric Bikes and Motorcycles
With the adaptation or invention of zero emission electrics it was only a matter of time before history repeated itself with electric bikes and electric motorcycles (bigger electric bikes). With these two electric motor cycles we have come full circle since the first single piston engine was mounted on the first bicycle.The Stromer electric bike is essentially a moped, https://www.stromerbike.com/en/us/
The Zero is a silent running zero emission two wheel rocket. http://www.zeromotorcycles.com/zero-s/