Nova Patents
US1152433A

Time-switch.

Abstract

This record has no abstract on file.

US1152433A, drawing sheet 1
Sheet 1 of 1

Term

Term ended

Expired 5 August 1934, 92.1 years ago.

  1. Priority and filed
  2. Granted
  3. Expired
  4. Today

8 claims: 8 independent, 0 dependent

  1. 1
    What I claim as new and desire to secure by Letters Patent is as follows:1. The combination of a housing, a contact connected to the housing, a rod movable 75 in the housing, a spring for actuating the rod in one direction relative to the housing, a second contact secured to the rod, a releasable buffer secured, to the rod and a second spring for returning the housing, con- go tacts and the rod to their normal positions.
  2. 2
    The combination of a pair of contacts, a member for closing the contacts, one of the contacts secured to the member, a yielding member connecting the first member to the 85 other contact and means for regulating the time interval in which the contacts are closed.
  3. 3
    The combination of a pair of contacts, a closing member for closing the contacts, a spring connecting the closing member with 90 one of the contacts,, a detent released in the closing operation of the closing member for permitting the said spring to open the'contacts. . . ,
  4. 4
    The combination of a pair of contacts, 95 a closing member for closing the contacts, a spring connected between the contacts for separating the contacts and a detent for temporarily holding the contacts in closed relation.
  5. 5
    The combination of a pair of contacts, a closing member for closing the contacts, a spring located intermediate the contacts for opening the contacts and. a spring for returning the contacts to their , normal po- 10 5 sitions and a detent for permitting the contacts to be temporarily retained in their closed positions. .
  6. 6
    The combination of a pair of contacts, a closing member, a spring located interme- 110 diate the contacts, one of the contacts connected to the closing member, the other contact connected to the spring and a buffer connected to one of the contacts for holding the contacts closed against the opening op- 115 eration of the spring. ,
  7. 7
    The combination of a pair of contacts, a member for closing the contacts, one of the contacts connected to the member, a yielding means located intermediate the contacts, a 120 buffer connected to the other of the contacts for holding the contacts closed against the operation, of the yielding means, a second yielding means for returning he contacts to their normal positions. 125
  8. 8
    The combination of a pair of contacts^ a member for closing the contacts, one of the contacts connected to the member, a rod 13 in a direction opposite to the pressure produced by the spring 16, but the j spring 51 having a lighter resisting pres- :sure the disk 14 connected to the rod 13 is ι 5 held at the bottom of the housing 10. J When the housing 10 is pushed downward by the pedal 5 the contacts 40 and 43 immediately close, the rod 13 being held up by the piston 20 as the valve disk 21 is imme10 diately closed. The spring 16 is compressed and tends to drive the rod 13 and the piston 20 downward. The valve disk 21 being closed the fluid seeps by the piston 20 very slowly and consequently allows the piston 20 15 to descend very slowly. Meantime the externa! circuit 48 through the binding post 47 is closed. When the piston 20. reaches the enlarged portion 32 where the fluid will freely pass around the periphery of the piston, the 20 spring 16 will snap or throw the piston 20 to the bottom of the cylinder 30 consequently separating the contacts 40 and 43, thereby breaking the external circuit by the operas tion of the spring, 16. The contact 43 will 25 be held away from the contact 40 notwithstanding the fact that the pedal 5 may be held down by the foot of the operator, the movement of the pedal being limited by the pin 12. When the pedal is released the 30 spring 51 operates to lift the housing 10, the rod 13 and the piston 20. The valve disk 21 thereby being removed from its seat 23, the piston 20 and the other parts freely move upward. The piston 20 again enters the 35 contracted portion 31 of the cylinder 30 and when the pedal 5 is again pressed downward the valve disk 21 is closed, contact is made between the contacts 40 and 43 and the spring 16 being compressed operates to 40 slowly force the piston 20 down the contracted portion 31 of the cylinder 30 whereupon rod 13 is released and the circuit is opened. When the spring 16 has been compressed by movement of the pedal 5 a short 45 distance it will continue to move the piston 20 notwithstanding the fact that there is no further downward movement of the pedal by the foot. Under such conditions the spring 16 continues to operate the rod 13 50 and piston 20 after the foot has moved the pedal but a short distance by reason of the fact that the piston acting as a buffer delays the operation of the spring 16 consequently, if time is given for the operation of the 55 spring 16, the rod will continue to be moved by the spring 16. The pins 41 and the springs 42 may be so constructed as to slightly tilt the upper contact 40 so that when the circuit is broken 60 there will be a slight shearing movement of the contacts relative to each other and break any welding that might occur by reason of the increased current formed in the breaking of the circuit. 1,162,483 yielding means located intermediate the contacts, a buffer connected to the other of the contacts for holding the contacts closed against the operation of the yielding means, 5 a yielding means for returning the buffer, i,he closing member and the contacts to their normal positions. . In testimony whereof, T have hereunto signed my name to this specification in the presence of two subscribing witnesses. THOMAS J. MURPHY. vv itnesses: Robert B. Cochran, Edward Miller.
Independent claims8