US1564207A - Controlling device for electric circuits - Google Patents

Controlling device for electric circuits Download PDF

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Publication number
US1564207A
US1564207A US657554A US65755423A US1564207A US 1564207 A US1564207 A US 1564207A US 657554 A US657554 A US 657554A US 65755423 A US65755423 A US 65755423A US 1564207 A US1564207 A US 1564207A
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Prior art keywords
switch
door
rod
spring
controlling
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US657554A
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Cloud John Wills
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/22—Operating parts, e.g. handle
    • H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/28—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H01H21/282—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover

Definitions

  • This invention relates to electric switches for the control of power, heating, or lighting circuits, and has for its object to provide an improved device for this purpose whereby a greater degree of safety and economy in current consumption may be obtained.
  • Figure 1 is a sectional plan view of a door or gate provided with one form of mechanism embodying the principle of the invention
  • Figure 2 being a sectional view 011 the line II-II of Figure 1
  • Figure 3 is a view similar to Figure 1 illustrating another form of mechanism embodying the invention
  • Figure 4 being a sectional view of the retaining device of Figure 3
  • Figure 5 is a view similar to Figure 1 illustrating a modified form of mechanism which may be employed.
  • the door or gate of the room or enclosure in which the electrically operated apparatus is located is indicated at 1, the jamb 2 of the door being provided with a retaining device indicated at 3.
  • the latter comprises a cylindrical casing 4 embedded in the j amb 2 of the door, a sleeve or bushing 5 open at one end being adapted to slide within the casing at as clearly shown in Figure 1.
  • the closed end of the bushing 5 is secured to an operating member 6 accommodated within a longitudinal slot 7 formed in the outer side of the casing 4.
  • a helical controlling spring 8 is interposed between the inner end of the casing 4e and the bushing 5,
  • the outer face of the door 1 is adapted to engage during its final closing movement with a tongue or projection 12 formed on the member 6, the final closing movement of the door 1 displacing the tongue towards the right until the tongue 12 lies in a slot 13 when the door 1 is fully closed, in which position the extreme end of the rod 9 is moved clear of the knob 11 of the switch 10 thus permitting the latter to be set to its on position.
  • the switch 10 is included in the circuit of the electrically operated apparatus and may itself constitute the ordinary controlling switch for this apparatus or may be an additional switch included in series with the usual controlling switch.
  • the retaining device 3 thus acts to set the switch 10 automatically to its off position when the door is opened, although the reclosure of the door does not move the switch 10 to its on position, this action being effected manually when permitted by the withdrawal of the rod 9 when the door 1 is fully closed.
  • the door 1 in order that the circuit of the electrically operated apparatus may be completed the door 1 must first be completely closed and the switch 10 must then be set into its on position which can only be effected from within the room or enclosure after the door 1 has been fully closed.
  • the construction of the retaining device 8 is somewhat different from that above described, the rod 9 being adapted to slide within a cylindrical casing let, the inner end of this rod being connected by means of a transverse pin or bolt 15 to a plunger 16 adapted to slide within a cylindrical extension 17 of the casing 14. containing the controlling spring 8.
  • the plunger 16 is adapted to be operated by the final closing movement of the door 1 so as to cause the 'rod 9 to be withdrawn from the knob 11 of the switch 10 against the action of the spring 8.
  • the operation of the mechanism shown in Figures 8 and 4 is identical with that above described. 1 I
  • the knob 11 of the switch 10 being provided with an extension 18 adaptedto be engaged by a striker plate 19 of rubber or other suitable materialattached to the in ner face of the door at the edge thereof as shown.
  • the striker plate 19 engages with the extension 18 of theswitch 10 and the continned movement. of the door thus set the witch 10 to its off position unless this has already been previously effected by the action of the rod 9 and its co-operating spring 8 as would normally be the case.
  • the extension 18 occupies the position shown in dotted lines in the figure from which it will be seen that during the reclosing movement of the door the latter does not engage with the projection 18 the switch 10 being thus left in its off position from which it may be set to its on position as soon as the door 1 is fully closed and thereby causes the withdrawal of the rod 9 as above described.
  • the invention may evidently also be applied with advantage to switches for controlling electric lighting circuits so as to prevent, for instance, an electric lamp from being left alight when a room is unoccupied.
  • the switch automatically controlled by the opening and closing of the door of the room may be supplemented by a pilot switch and a pilot lamp so arranged that the pilot switch which is closed either manually or automatically when the door is opened causes the pilot lamp to be illuminated.
  • This lamp which may conveniently be located adjacent to the main switch being arranged to be automatically extinguished when the main switch is manually closed to render the lamp or lamps of the room operative.
  • a movable barrier an electric switch operating arm having an off and an on position, a longitudinally movable rod dis posed to engage said arm, a spring tending to shift said rod and thereby said arm to its oil? position, and an element carried by said rod and operable by said movable barrier upon movement to its closed position for moving said rod out of engagement with said arm to permit manual movement of said arm to its on position.

Description

, 1.564.207 J. W. CLOUD CONTROLLING DEVICE FOR ELECTRIC CIRCUITS Filed Aug. 15. 1923 2 Sheets-Sheet 1 Dec. 8, 1925- w. Q 7 m WM W m 5 Chi 9 W 5 m a /v k WIIIIiN M M A Q 3 w 1 9 m M M NI!!! 9a 2 1 PM 1 Ml f m l F INVENTOR \JOHN W.GLOUD BY 464% ATTORNEY Dec. 8, 1925- 1,564,207
J. w. CLOUD CONTROLLING DEVICE FOR ELECTRIC CIRCUITS Filed Aug. 15. 1923 2 Sheets-Sheet 2 INVENTOR JOHN W. CLOUD ATTORNEY Patented Dec. 8, 1925.
JOHN WILLS CLOUD, OF LONDON, ENGLAND.
CONTROLLING DEVICE FOR ELECTRIC CIRCUITS.
Application filed August 15, 1923.
To all whom 2'25 may concern:
Be it known that I, JorrNlVILLs CLOUD, a subject of the King of Great Britain and Ireland, residing at London, England, have invented a certain new and useful Improvement in Controlling Devices for Electric Circuits, of which the following is a specification.
This invention relates to electric switches for the control of power, heating, or lighting circuits, and has for its object to provide an improved device for this purpose whereby a greater degree of safety and economy in current consumption may be obtained.
In connection with electrically operated apparatus such as electric irons, lamps, or the like, it is usual to provide a manually operated switch whereby the supply of operating current to the apparatus can be cut off when desired. Experience has shown, however, that the operator is liable to leave the apparatus without first opening the switch with the result that not only is there a risk ofthe apparatus becoming dangerously overheated butalso a considerable waste of electrical energy is occasioned.
The invention is illustrated in the accompanying drawings, of which Figure 1 is a sectional plan view of a door or gate provided with one form of mechanism embodying the principle of the invention; Figure 2 being a sectional view 011 the line II-II of Figure 1; Figure 3 is a view similar to Figure 1 illustrating another form of mechanism embodying the invention; Figure 4 being a sectional view of the retaining device of Figure 3; Figure 5 is a view similar to Figure 1 illustrating a modified form of mechanism which may be employed.
Referring now first to the construction shown in Figures 1 and 2, the door or gate of the room or enclosure in which the electrically operated apparatus is located is indicated at 1, the jamb 2 of the door being provided with a retaining device indicated at 3. The latter comprises a cylindrical casing 4 embedded in the j amb 2 of the door, a sleeve or bushing 5 open at one end being adapted to slide within the casing at as clearly shown in Figure 1.
The closed end of the bushing 5 is secured to an operating member 6 accommodated within a longitudinal slot 7 formed in the outer side of the casing 4. A helical controlling spring 8 is interposed between the inner end of the casing 4e and the bushing 5,
Serial No. 657,554.
the latter of which is traversed by a rod 9, the inner end of the rod 9 being surrounded by the controlling spring 8 and the outer end of this rod projecting from the surface of the jamb 2 towards an electric switch 10 here shown as of the tumbler type. The switch 10 is so arranged that when the rod 9 is in the position shown in Figure 1 in which it is maintained by the controlling spring 8 when the door 1 is open, the extreme end of the rod 9 is closely adjacent to the operating knob 11 of the switch When in its off position. The outer face of the door 1 is adapted to engage during its final closing movement with a tongue or projection 12 formed on the member 6, the final closing movement of the door 1 displacing the tongue towards the right until the tongue 12 lies in a slot 13 when the door 1 is fully closed, in which position the extreme end of the rod 9 is moved clear of the knob 11 of the switch 10 thus permitting the latter to be set to its on position.
The switch 10 is included in the circuit of the electrically operated apparatus and may itself constitute the ordinary controlling switch for this apparatus or may be an additional switch included in series with the usual controlling switch.
The operation of the mechanism is as follows:
So long as the door 1 is open the rod 9 is maintained by the action of the controlling spring 8 in the position shown in Figure 1 in which the knob 11 of the switch- 10 is positively maintained in its off position and cannot be moved to its on position to enable the circuit of the electrically operated apparatus to be closed. The complete closure of the door 1 moves the ton ue or projection 12 towards the right, this projection carrying with it the operating member 6 and the sleeve 5 against the opposing action of the spring 8. The rod 9 is thus, when the door is fully closed, withdrawn towards the right and the knob 11 of the switch 10 can then be set to its on position, indicated in dotted lines at 11. The circuit of the electrically operated apparatus is thus completed at the switch 10 and operating current may be supplied to the apparatus controlled by this switch. In the event, however, of the door 1 being opened, the controlling spring 8 wil1evidently cause the rod 9 to be moved outwards and by engagement with the knob 11 of the switch 10 to return this switch to its oil position.
.It will be observed that the retaining device 3 thus acts to set the switch 10 automatically to its off position when the door is opened, although the reclosure of the door does not move the switch 10 to its on position, this action being effected manually when permitted by the withdrawal of the rod 9 when the door 1 is fully closed.
It will thus be seen that in order that the circuit of the electrically operated apparatus may be completed the door 1 must first be completely closed and the switch 10 must then be set into its on position which can only be effected from within the room or enclosure after the door 1 has been fully closed.
In the mechanism illustrated in Figures 3 and 4 the construction of the retaining device 8 is somewhat different from that above described, the rod 9 being adapted to slide within a cylindrical casing let, the inner end of this rod being connected by means of a transverse pin or bolt 15 to a plunger 16 adapted to slide within a cylindrical extension 17 of the casing 14. containing the controlling spring 8.
The plunger 16 is adapted to be operated by the final closing movement of the door 1 so as to cause the 'rod 9 to be withdrawn from the knob 11 of the switch 10 against the action of the spring 8. In other respects the operation of the mechanism shown in Figures 8 and 4 is identical with that above described. 1 I
It Will be observed that in the constructions illustrated in Figures 1 to 4 inclusive the setting of the switch 10 to its ofi position is eifected by the action of the controlling spring 8 when the door 1 is opened and it is therefore essential that the strength of the spring 8 should be sufiicient for this purpose.
In the modified constructionillustrated in off position when the door is open-ed is arranged to be eifected under certain conditions positively by means of the door 1 itself, the knob 11 of the switch 10 being provided with an extension 18 adaptedto be engaged by a striker plate 19 of rubber or other suitable materialattached to the in ner face of the door at the edge thereof as shown.
Itwill be seen that when the door 1 is in its closed position indicated in full lines in Figure 5, the rod 9 is maintained in its retracted positionand the switch 10 can therefore be set to its on position.
During the opening movement of the door 1 and when the inner face of the door attains the position indicated in dotted lines at 1,the striker plate 19 engages with the extension 18 of theswitch 10 and the continned movement. of the door thus set the witch 10 to its off position unless this has already been previously effected by the action of the rod 9 and its co-operating spring 8 as would normally be the case. Under these conditions, the extension 18 occupies the position shown in dotted lines in the figure from which it will be seen that during the reclosing movement of the door the latter does not engage with the projection 18 the switch 10 being thus left in its off position from which it may be set to its on position as soon as the door 1 is fully closed and thereby causes the withdrawal of the rod 9 as above described.
The arrangen'ient illustrated in Figure 5 may obviously be modified in such a manner that the door 1 or a striker element carried thereby will engage with the extension 18 on the switch 1O prior to the engagement oi the end of the rod 9 with the knob 11 in which case it will be seen that the switch is always positively moved to its oft position by the door itself.
The invention may evidently also be applied with advantage to switches for controlling electric lighting circuits so as to prevent, for instance, an electric lamp from being left alight when a room is unoccupied.
In this case the switch automatically controlled by the opening and closing of the door of the room may be supplemented by a pilot switch and a pilot lamp so arranged that the pilot switch which is closed either manually or automatically when the door is opened causes the pilot lamp to be illuminated. This lamp which may conveniently be located adjacent to the main switch being arranged to be automatically extinguished when the main switch is manually closed to render the lamp or lamps of the room operative.
It will be understood that in the case of there being more than one door or gate to the enclosure containing the electrically operated apparatus to be controlled, an additionalsw'itch will be provided at each such door or gate, so that the circuit of the electrically operated apparatus will be automatically opened in the event of any of the doors or gates being opened.
The construction of the mechanism for operating the switch in the manner above described may evidently be varied in many respects without exceeding the scope of the invention.
Having now described my invention, what I claim as new and desire to secure by Letters Patent, is
1. The combination with a manually operable member for operating an electric switch, of a movable barrier, a rod movable to engage and shift said member to oil position, a. spring tending to move said rod and thereby said member to off position,
and an element associated with said rod and operated by the movement of said barrier to its closed position for moving said rod out of engagement with said member.
2. The combination with a manually operable member for operating an electric switch, of a movable barrier, a casing, a sleeve slidably mounted in said casing, a rod secured to said sleeve and movable to engage and shift said member to off position, a spring tending to move said sleeve and rod to off posit-ion, and an element movable with said rod and positioned to be engaged by said movable barrier for shitting said sleeve and rod out of engagement with said member upon movement of said barrier to closed position.
3. A movable barrier, an electric switch operating arm having an off and an on position, a longitudinally movable rod dis posed to engage said arm, a spring tending to shift said rod and thereby said arm to its oil? position, and an element carried by said rod and operable by said movable barrier upon movement to its closed position for moving said rod out of engagement with said arm to permit manual movement of said arm to its on position.
4. The combination with a movable bar rier, of an electric switch operating arm, a casing, a sleeve mounted in said casing, a rod carried by said sleeve and adapted to engage said arm, a spring mounted in said casing and engaging said sleeve, a member movable with said sleeve and having a portion engageable by said barrier, the move ment of the barrier to its closed position operating said member to shift said sleeve and rod against the pressure of said spring to a position permitting the free manual operation of said switch arm.
In witness whereof I have hereunto set my hand.
JOHN WVILLS CLOUD.
US657554A 1923-05-10 1923-08-15 Controlling device for electric circuits Expired - Lifetime US1564207A (en)

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Application Number Priority Date Filing Date Title
US657554A US1564207A (en) 1923-05-10 1923-08-15 Controlling device for electric circuits

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Application Number Priority Date Filing Date Title
GB1257923A GB217724A (en) 1923-05-10 1923-05-10 Improvements relating to electric switches
US657554A US1564207A (en) 1923-05-10 1923-08-15 Controlling device for electric circuits

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522063A (en) * 1947-06-16 1950-09-12 Pompeo M Santullo Cover operated switch
US2524215A (en) * 1946-07-15 1950-10-03 John H Wegehoft Low-voltage attachment switch
US3238308A (en) * 1959-09-04 1966-03-01 Philips Corp Arrangement in magnetic recorders having a trick switch
US3499132A (en) * 1967-05-23 1970-03-03 Farron Lowe Stevens Switch actuator
US3689718A (en) * 1971-03-31 1972-09-05 Westinghouse Electric Corp Automatic line switch lock-out
US5896783A (en) * 1995-11-24 1999-04-27 K. A. Schmersal Gmbh & Co. Safety switch device
US6175690B1 (en) 1999-11-10 2001-01-16 Concord Camera Corp. Flash camera with extendable arm for disabling the flash unit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2524215A (en) * 1946-07-15 1950-10-03 John H Wegehoft Low-voltage attachment switch
US2522063A (en) * 1947-06-16 1950-09-12 Pompeo M Santullo Cover operated switch
US3238308A (en) * 1959-09-04 1966-03-01 Philips Corp Arrangement in magnetic recorders having a trick switch
US3499132A (en) * 1967-05-23 1970-03-03 Farron Lowe Stevens Switch actuator
US3689718A (en) * 1971-03-31 1972-09-05 Westinghouse Electric Corp Automatic line switch lock-out
US5896783A (en) * 1995-11-24 1999-04-27 K. A. Schmersal Gmbh & Co. Safety switch device
US6175690B1 (en) 1999-11-10 2001-01-16 Concord Camera Corp. Flash camera with extendable arm for disabling the flash unit

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