Electro-pneumatic brake apparatus for railway vehicles
First Claim
1. Electro-pneumatic brake apparatus for railway vehicles comprising:
- a. a source of pneumatic pressure;
b. pneumatic brake means responsive to pneumatic pressure for providing a pneumatic brake force;
c. dynamic brake means responsive to an electrical impulse for providing a magnetic brake torque;
d. operator actuated means providing a brake-initiating signal of preselected magnitude;
e. primary relay valve device connected to said source of pneumatic pressure and to said operator actuated means and operable responsively to said brake-initiating signal to produce a first control pressure;
f. a pneumatic-electro converter device connected to said primary relay valve device and to said dynamic brake means for converting said first control pressure to an electrical impulse transmitted to said dynamic portion for producing said magnetic brake torque;
g. electro-pneumatic converter means connected to said dynamic brake means for receiving and converting said magnetic brake torque to a second control pressure; and
h. a secondary relay valve device connected to said source of pneumatic pressure, to said primary relay valve device, and to said electro-pneumatic converter means, and operable responsively to said first and second control pressures for effecting supply of operating pneumatic pressure from said source to said pneumatic brake means at a degree according the differential between said first and second control pressures for producing a corresponding brake force.
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Accused Products
Abstract
Electro-pneumatic brake apparatus for railway vehicles including a dynamic brake portion and a fluid pressure operable brake portion both of which are actuated by a common variable signal which produces a corresponding control pressure for effecting operation of said fluid pressure operable portion, such control pressure also being simultaneously converted to an electrical control pulse for effecting operation of the dynamic brake portion at the same time as, or at least not ahead of, the fluid pressure operable portion. The apparatus is further provided with a combined electro-pneumatic monitoring device for determining the sufficiency of the combined brake application.
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Citations
8 Claims
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1. Electro-pneumatic brake apparatus for railway vehicles comprising:
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a. a source of pneumatic pressure; b. pneumatic brake means responsive to pneumatic pressure for providing a pneumatic brake force; c. dynamic brake means responsive to an electrical impulse for providing a magnetic brake torque; d. operator actuated means providing a brake-initiating signal of preselected magnitude; e. primary relay valve device connected to said source of pneumatic pressure and to said operator actuated means and operable responsively to said brake-initiating signal to produce a first control pressure; f. a pneumatic-electro converter device connected to said primary relay valve device and to said dynamic brake means for converting said first control pressure to an electrical impulse transmitted to said dynamic portion for producing said magnetic brake torque; g. electro-pneumatic converter means connected to said dynamic brake means for receiving and converting said magnetic brake torque to a second control pressure; and h. a secondary relay valve device connected to said source of pneumatic pressure, to said primary relay valve device, and to said electro-pneumatic converter means, and operable responsively to said first and second control pressures for effecting supply of operating pneumatic pressure from said source to said pneumatic brake means at a degree according the differential between said first and second control pressures for producing a corresponding brake force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification