US2832858A - Switch operator - Google Patents

Switch operator Download PDF

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Publication number
US2832858A
US2832858A US534285A US53428555A US2832858A US 2832858 A US2832858 A US 2832858A US 534285 A US534285 A US 534285A US 53428555 A US53428555 A US 53428555A US 2832858 A US2832858 A US 2832858A
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Prior art keywords
switch
cam
operator
switch operator
handle
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Expired - Lifetime
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US534285A
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Clarence W Tydeman
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/046—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed depending on the position of the working member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H01H15/102—Operating parts comprising cam devices
    • H01H15/105—Adjustable cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/27—Directional control by means of the pressure source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41581—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/421—Flow control characterised by the type of actuation mechanically
    • F15B2211/424—Flow control characterised by the type of actuation mechanically actuated by an output member of the circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member

Definitions

  • Machines of this general type employ hydraulic rams for advancing cutting tools such as boring bars and employ hydraulic fluid under high pressure for operating the rams.
  • the speed at which the tool advances must be accurately controlled for which purpose magnetically operable valves are provided which are operated by the machine at preset intervals to change its speed or effect other changes.
  • Such machines are carefully adjusted and preset to perform the desired machine operation and employ for this purpose electromagnetic valves, relays, micro-switches and switch operators that function cooperatively to effect the different changes in the cycle of the machine operation.
  • the present invention relates to a switch operator that can be readily adjusted and positively secured in adjusted position.
  • Figure 1 is a diagrammatic representation of a quill type boring machine in connection with which the present invention has been shown;
  • Figure 2 is a side elevational view of the switch operator showing its relation to an electric switch
  • Figure 3 is an end elevation of the operator to an enlarged scale, looking in the direction of arrow 3 in Figure 2;
  • Figure 4 shows a development of the outer surface of the operator
  • Figure 5 is a section taken on line 55 Figure 2.
  • reference numeral designates the switch operator to which this invention specifically relates, in operative relation to an electric switch 11 from the top of which a switch handle 12 projects.
  • the invention has a broader application or use than the one illustrated in Figure 1, it will be described in connection with the boring machine as illustrating one use that is typical.
  • reference numeral 13 designates the cylinder of a hydraulic ram through which the tubular piston rod 14 extends.
  • Attached to the piston rod is an annular piston 15 that forms the subject of a separate application.
  • Journaled in the piston rod is a boring bar 16 provided at its end with a cutting tool 17.
  • Attached to the lefthand end of the piston rod, when viewed as in Figure 1, is an arm 18, whose upper end is provided with a plate 19 that serves as a support for motor 20.
  • Means which is represented by a rod 21 that is attached at its outer end to arm 18 and has a slidable connection with guide 22, serves to prevent arm 18 from turning when the machine operates.
  • the switch operator 10 is provided with a cam whose edge 33 extends a short distance beyond the surface of the heel portion 34 and, as illustrated, makes slightly less than one complete turn leaving a gap 35 as shown in Figure 3.
  • Figure 4 is a development of the outer surface of member 10.
  • the operator or cam 10 is provided with a cylindrical shank 36 that fits snugly in an opening in the lower end of arm 18 and is held in place by washer 37 and cap screw 38.
  • the switch'll is normally held in open position and is closed by a downward push'on button 12.
  • button 12 is urged against surface 34 by the spring that keeps the switch contacts separated.
  • switch 11 is normally closed and is then opened by the cam.
  • the extent of the longitudinal movement of member 10 before the switch is operated depends on the rotary position of the cam relative to the button 12 and in setting up the machine for a certain job the mechanic loosens the cap screw 38 and rotates the cam until it will engage and operate the switch when the parts reach a predetermined position.
  • screw 38 is tightened to hold it securely in place. This arrangement allows the parts to be adjusted with great accuracy and speed.
  • switch 11 has been shown directly underneath cam 10 but it is obvious that it may occupy any rotary position relative to the cam.
  • switch 11 is a micro-switch circuit 31 is normally provided with a relay in the usual manner.
  • a switching mechanism comprising in combination, a base, an electric switch having an upwardly extending switch handle, attached to the base, an elongated substantially cylindrical switch operator cam member operatively attached to the base, positioned above the switch handle and mounted for both axial and rotary movement relative to the switch handle, said operator cam member having a cam surface spiraled about its outer surface, the cam surface making not to exceed one complete turn, the parts being so positioned and arranged that the cam surface will engage the switch handle and operate the switch when the cam member moves axially, the point of switch operation relative to the axial movement of the cam surface being dependent on the rotary position of the cam member relative to the switch handle.
  • An adjustable switching mechanism in combination, a base, a switch attached to the base, said switch having 0 v.3 a switch handle projecting upwardly therefrom, an elongated, substantially cylindrical switch operating cam member supported by the base and positioned above the switch handle, means for moving said cam member in an axial direction, a cam surface spiraled about the switch operator in a position facing the switch handle, the cam member being mounted for rotary adjustment relative to-the switch handle, whereby the distance from the cam surface to the switch handle in any axial position of said cam can be changed by turning the cam member about its axis.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanisms For Operating Contacts (AREA)

Description

April 29, 1958 c. w. TYDEMZAN 2,832,858
SWITCH OPERATOR Filed Sept. 14, 1955 INVENTOR. CLARENCE k4 TYDEMAN ATTORNEYS United States Patent P SWITCH OPERATOR Clarence W. Tydeman, Redwood City, Calif. Application September'14, 1955, Serial No. 534,285
3 4 Claims. (Cl. 200-47 This invention relates to improvements in electric switching mechanisms and has reference more particularly to a switch operator for controlling the operation of automatic machines of the general type to which applicants pending application Serial No. 324,805, filed December 8, 1952, now abandoned, relates.
Machines of this general type employ hydraulic rams for advancing cutting tools such as boring bars and employ hydraulic fluid under high pressure for operating the rams. The speed at which the tool advances must be accurately controlled for which purpose magnetically operable valves are provided which are operated by the machine at preset intervals to change its speed or effect other changes. Such machines are carefully adjusted and preset to perform the desired machine operation and employ for this purpose electromagnetic valves, relays, micro-switches and switch operators that function cooperatively to effect the different changes in the cycle of the machine operation. The present invention relates to a switch operator that can be readily adjusted and positively secured in adjusted position.
Having thus described in a general way the purpose of the invention, it will now be described in greater detail for which purpose reference will be had to the accompanying drawing, in which:
Figure 1 is a diagrammatic representation of a quill type boring machine in connection with which the present invention has been shown;
Figure 2 is a side elevational view of the switch operator showing its relation to an electric switch;
Figure 3 is an end elevation of the operator to an enlarged scale, looking in the direction of arrow 3 in Figure 2;
Figure 4 shows a development of the outer surface of the operator; and,
Figure 5 is a section taken on line 55 Figure 2.
Referring now to the drawing, reference numeral designates the switch operator to which this invention specifically relates, in operative relation to an electric switch 11 from the top of which a switch handle 12 projects. Although the invention has a broader application or use than the one illustrated in Figure 1, it will be described in connection with the boring machine as illustrating one use that is typical.
In Figure 1 reference numeral 13 designates the cylinder of a hydraulic ram through which the tubular piston rod 14 extends. Attached to the piston rod is an annular piston 15 that forms the subject of a separate application. Journaled in the piston rod is a boring bar 16 provided at its end with a cutting tool 17. Attached to the lefthand end of the piston rod, when viewed as in Figure 1, is an arm 18, whose upper end is provided with a plate 19 that serves as a support for motor 20. Means, which is represented by a rod 21 that is attached at its outer end to arm 18 and has a slidable connection with guide 22, serves to prevent arm 18 from turning when the machine operates. Associated with the parts described is a 2,832,858 Patented Apr. 29,-1958 supply of hydraulic fluid contained in sump 23 and a power driven gear pump 24 whose intake port is connected with the sump by pipe 25 and whose delivery port is connected with the cylinder as shown. The other end of the cylinder (right end) is provided with an outlet pipe 26-, the outlet of which is controlled by a needle valve 27. Extending from pipe 26 is a pipe 28 that communicates with the sump and in which is positioned a normally closed valve 29 of the plunger type illustrated in the application above identified, which is operable by means of a solenoid 30. The switch 11 is normally open and is connected with the solenoid by means of a circuit 31 in which is a battery 32. When switch 11 closes valve 29 opens and provides a by-pass about valve 27 to effect quick traverse of the tool. When switch 11 opens the tool will resume its slow motion.
As stated above the use illustrated and described is merely for the purpose of illustration. It is to be understood, of course, that the invention is not limited to any particular use.
Referring now to Figures 2, 3 and 4, it will be seen that the switch operator 10 is provided with a cam whose edge 33 extends a short distance beyond the surface of the heel portion 34 and, as illustrated, makes slightly less than one complete turn leaving a gap 35 as shown in Figure 3. Figure 4 is a development of the outer surface of member 10. The operator or cam 10 is provided with a cylindrical shank 36 that fits snugly in an opening in the lower end of arm 18 and is held in place by washer 37 and cap screw 38. In the drawing the switch'll is normally held in open position and is closed by a downward push'on button 12. In the drawing, button 12 is urged against surface 34 by the spring that keeps the switch contacts separated. When operator 10 has moved towards the right until point 39 of the cam reaches button 12, further movement of member 10 will depress button 12 and close the switch. In some cases switch 11 is normally closed and is then opened by the cam. The extent of the longitudinal movement of member 10 before the switch is operated depends on the rotary position of the cam relative to the button 12 and in setting up the machine for a certain job the mechanic loosens the cap screw 38 and rotates the cam until it will engage and operate the switch when the parts reach a predetermined position. When the cam has been properly adjusted, screw 38 is tightened to hold it securely in place. This arrangement allows the parts to be adjusted with great accuracy and speed.
In the drawing switch 11 has been shown directly underneath cam 10 but it is obvious that it may occupy any rotary position relative to the cam. When switch 11 is a micro-switch circuit 31 is normally provided with a relay in the usual manner.
What is claimed as new is:
1. A switching mechanism comprising in combination, a base, an electric switch having an upwardly extending switch handle, attached to the base, an elongated substantially cylindrical switch operator cam member operatively attached to the base, positioned above the switch handle and mounted for both axial and rotary movement relative to the switch handle, said operator cam member having a cam surface spiraled about its outer surface, the cam surface making not to exceed one complete turn, the parts being so positioned and arranged that the cam surface will engage the switch handle and operate the switch when the cam member moves axially, the point of switch operation relative to the axial movement of the cam surface being dependent on the rotary position of the cam member relative to the switch handle.
2. An adjustable switching mechanism, in combination, a base, a switch attached to the base, said switch having 0 v.3 a switch handle projecting upwardly therefrom, an elongated, substantially cylindrical switch operating cam member supported by the base and positioned above the switch handle, means for moving said cam member in an axial direction, a cam surface spiraled about the switch operator in a position facing the switch handle, the cam member being mounted for rotary adjustment relative to-the switch handle, whereby the distance from the cam surface to the switch handle in any axial position of said cam can be changed by turning the cam member about its axis.
, 3. A mechanism in accordance with claim 2 in which the switch operator cam member has an outer surface comprising a heel portion of one radius and a raised cam surface of a larger radius the edge of the raised portion which'forms a cam surface extending spirally about the operator.
4. A mechanism in accordance with claim 3 in which the raised helical cam surface forms less than one complete turn about the heel portion.
References Cited in'the file of this patent UNITED STATES PATENTS 1,813,780 Tuttle July 7, 1931 1,881,719 Leach Oct. 11, 1932' 2,483,712 Schaefer Oct. 4, 1949
US534285A 1955-09-14 1955-09-14 Switch operator Expired - Lifetime US2832858A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417218A (en) * 1967-01-11 1968-12-17 Glen A. Norwood Switch actuating apparatus utilizing a reciprocal rod with helical grooves to impart rotational movement to cams
US3518902A (en) * 1968-02-12 1970-07-07 Matson C G Reciprocating rotary tool carrier
FR2529354A1 (en) * 1982-06-24 1983-12-30 Dobson Park Ind DEVICE LIMITING THE AMPLITUDE OF A ROTATION

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1813780A (en) * 1927-07-15 1931-07-07 Ralph V Tuttle Timing device
US1881719A (en) * 1930-11-26 1932-10-11 Modern Coal Burner Company Electrical control device
US2483712A (en) * 1945-05-04 1949-10-04 Nat Automatic Tool Company Inc Machine tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1813780A (en) * 1927-07-15 1931-07-07 Ralph V Tuttle Timing device
US1881719A (en) * 1930-11-26 1932-10-11 Modern Coal Burner Company Electrical control device
US2483712A (en) * 1945-05-04 1949-10-04 Nat Automatic Tool Company Inc Machine tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417218A (en) * 1967-01-11 1968-12-17 Glen A. Norwood Switch actuating apparatus utilizing a reciprocal rod with helical grooves to impart rotational movement to cams
US3518902A (en) * 1968-02-12 1970-07-07 Matson C G Reciprocating rotary tool carrier
FR2529354A1 (en) * 1982-06-24 1983-12-30 Dobson Park Ind DEVICE LIMITING THE AMPLITUDE OF A ROTATION

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