US2293968A - Cam operated electrical switch - Google Patents

Description

Aug? 1942- o. 1.. CHANDLER arm. 2,293,963

CAI OPERATED ELECTRICAL SWITCH Filed May 5, 1941 3 Sheets-Sheet l G-2 1942. n. 1.. CHANDLER ETAL CAM OPERATED ELECTRICAL SWITCH Filed May 5, 1941 3 Sheets-Sheet 2 19 25, 2- o. g. CHANDLER ETAL 2,293,968

CAJI'OPERATED ELECTRICAL SWITCH Filed May 5, 1941 3 Sheets-Sheet 3 Ei z ' window pane has definite limits of travel.

Patented Aug. 25, 1942 CAM OPERATED ELECTRICAL SWITCH Daniel L. Chandler and Frank H. Walker, Salem and George W. Ewing, Peabody,

Mass., assignors to Aresee Company Inc., Salem, Mass., a corporation of -Massachusetts Application May 5, 1941, Serial No. 391,887

3 Claims.

Our present invention relates to electrical switches and more particularly to solenoid actuated electrical switches in which the solenoid is used for the purpose of closing the electrical circuit to the switch which is electrically connected to a reversible electrical motor used for the purpose of operating sliding window panes in automobile doors and the like in which the In addition thereto, our improved switch incorporates a cam member actuated from outside sources, such as the window pane, which prevents the solenoid from opening the motor circuit under certain conditions and also opens the motor circuit by breaking the control of the solenoids at other instances even though the solenoids are electrically energized.

The principal object of our invention is to provide animproved electrical switch for electrically operated automobile windows and the like of the sliding type;

Another object is to provide an improved electrical switch for automobile door windows and the like incorporating therein a solenoid for the purpose of closing the switch which controls the electrical motor in combination with a cam member which definitely breaks the magnetic control of the solenoids which holds the said motor switch closed;

Still another object is to provide an improved solenoid actuated electrical switch and solenoid control cam in which the said cam, under certain conditions, will prevent the solenoids from opening the electrical circuit to the motor even though the said solenoid may be electrically energized, and

Other objects and novel features comprising the construction and operating of our improved switch will be apparent as the description of the same progresses.

In the drawings illustrating the preferred embodiment of our invention,

Fig. l is an inside elevation of an automobile door, portions of the inner panel being broken away for convenience, and showing the electrical solenoid cam controlled switch as applied to one type of electrically operated automobile door window;

Fig. 2 is a front end elevation of the switch and connecting members, portions of the connection members and the switch being broken away;

Fig. 3 is another front end elevation of the switch shown in Fig. 1, portions of the connecting members being broken away, and showing the cam member in an opposite position to that shown in Fig. 1;

Fig. 4 is still another front end elevation of the switch with portions of the switch and connecting member broken away, and showing the position of the cam when in a neutral position. In this position the solenoids are free to actuate the motor switch circuit at any time the solenoids are energized;

Fig. 5 is a wiring diagram of the circuits used both to the solenoids and the motor portion of the switch;

Fig. 6 is a side elevation of the switch, as viewed from the inside of the door, a portion of the mounting frame being broken away, and a fragment of the door frame being shown;

Fig. 7 is a cross-section taken on the line l! of Fig. 6 and showing a rear end elevation;

Fig. 8 is a fragmentary back side elevation of the switch, portions of the mounting frame and connecting member being broken away for convenience, and

Fig. 9 is a detail plan view of the throw member of the switch which is controlled by the solenoids and the cam member the unit being removed from the rest of the switch block for clearer illustration.

The various switch elements disclosed in Figs. 1 to 9 inclusive comprise a double pole double throw switch together with the control cam and other connecting elements.

The double pole double throw switch is designed for the purpose of reversing the electrical motor used in the electrically operated window shown in Fig. 1, and for other electrically operated windows in which the window pane acts together with other equipment to open the electrical circuit of a control switch.

Referring more in detail to the drawings, [0 illustrates a conventiona automobile door having a frame H, window opening l2, outside panel l3 and inside panel 14. In the automobile door illustrated, the window pane I5 slides up and down in the guide way 16. The lower edge of the glass window pane i5 is provided with a channel member ll from which is suspended a driving mechanism comprising a reversible motor l8 which is directly connected through its armature with the drive shaft I9 and worms 20. The worms 20 are engaged with the worm gears 2| journalled in the suspended housings 22. On the outside of the housings 22 are located pinion gears 23 which are integral with the gears 2|. Meshin with the pinion gears 23 are racks 24 fixed to the inside of the inner panel l4 and slidably mounted in slideway portions 22a which are attached to the hous ngs 22.

On the door frame II is mounted the double pole double throw switch, generally indicated by the numeral 25. The slide way portion 22a adjacent the switch 25 is provided with an extension member 26 through which passes a rod member 21, the .upper end of which is slidably engaged through the bracket member 28 secured to the panel I4. On the rod 21 are secured stop members 29 and 30.

It will be apparent that when the window pane |5 rises to its full limit the stop member 29 will be engaged by the top surface of the slide way portion 26 at which point the rod 21 will have "moved up a short distance in the bracket 28 thereby swinging the cam 3| on the pivot 32 thereby placing the cam 3| in the approximate position shown in Fig. 3. When the window pane I5 is lowered the cam 3| becomes neutralized, as shown in Fig. 4. In the full lowest position, as illustrated in Fig. 2, the window pane is down, as shown in Fig. 1.-

Fig. 1, as previously stated, illustrates one form of connection between the sliding sash of the door l and the cam 3| of the switch 25. If desired, the stop members 29 and 30 may be operated from a simple bracket, such as 28, fixed to the side of the channel member H, or any other arrangement to suit the conditions, as the case may be.

The switch I0 comprises a frame 33 which is attached to the door frame I In the particular frame 33, a portion 34 is split downwardly from the forward end of the frame adjacent 0n the other side of the frame 33 another portion '35 is split upwardly to form a lower right-angle bracket member. Between the free ends of the bracket members 34 and 35 is fixed an insulated switch block member -36.

Attached to the under side of the upper portion of the frame 33, by means of the screw 31 is a solenoid 33. Attached to the under side of the frame 33 is another solenoid 39 held to the frame 33 by means of the screw 49. The two solenoids 33 and 39 have a common vertical axis. The upper bracket 34 and lower bracket 35 is recessed on the inner edges adjacent the solenoids to allow the free ends of the solenoids to clear the brackets.

The switch block 36 is recessed on each side to receive the bent over portions 4| and 42 comprising throw members 43 and 44 which form the points which engage other members of the switch assembly when the solenoids are energized.

and held together on their free ends by means of the insulated member 45 through the central portion of which projects on either side the metal post 46 which is attracted to the cores of the switch assembly when the solenoids are energized. Also attached to the insulated member 45 is the cam control pin 41 which projects out through the vertically elongated slot 48 in the forward end of the frame 33, as. shown in Figs. 2, 3 and 4.

Fixed in the upper portion of the switch block 36 are the switch levers 49 and 59 to which the contact points and 52 are respectively attached and against which the points 43 and 44 are drawn when the solenoid 38 is energized with the cam 3| in the position shown in Fig. 4. In a similar manner switch levers 53 and 54 to which the points 55 and 56 are respectively attached are adapted to engage the points 43 and the cam 3| to form an upper right-angle bracket.

The throw members 4| and 42 are spaced apart 44 respectively when the throw member is drawn against the solenoid 33.

The cam 3| is pivoted at 32 to the forward end of the frame 33 and is maintained in the neutral position shown in Fig. 4 by means of the equalizing springs 51. The cam 3| is provided at its upper portion on the side adjacent the outer door panel with a lever arm 53 through which is pivoted the rod 2'| The cam is provided with an internal track having high points 59 and 63.

When the cam is in the position shown in Fig. 4, the pin 4'! which is attached to the insulated member 45 attached to the throw levers 4| and 42 is free to move up or down. as the case may be thereby allowing the contact member 43 and 44 to engage the points 49 and 50 or the points 53 and 54 depending upon which ever one of the solenoids are energized. In one position,

the window pane I5 moves upwardly and in the other position, the window pane moves downwardly.

If it be assumed that the window pane is moving upwardly, the points 43 and 44 will be engaged with the points 55 and 56 and the solenoid 39 will be energized. When the member 26 engages the stop member 29 the rod 21 will lift thereby swinging the cam 3|, from the neutral position shown in Fig. 4 to the position shown in Fig. 3. The high point 60 of the cam 3| will now engage the'pin 4'| lifting it to the central position shown in Figs. 6 and 8 thereby opening v the electrical circuit to the motor l8.

If it be assumed that the window pane I5 is engaged with the points 5| and 52 and the solenoid 38 will be energized. When the member 26 engages the stop member 30 the rod 21 will be depressed forcing the cam 3| down from the neutral position shown in Fig-4 to the position shown in Fig. 2 at which point the high point 59 of the cam pulls the pin 41 down breaking the connection between the points 43 and 44 and the points 5| and 52 thereby opening the electrical circuit to the motor |8.

It will be noted that when the window pane reaches its limit of travel in either direction the pin 41 will have opened the switch circuit, as viewed in Figs. 6 and 8. The switch 25 is controlled from push buttons 6| and 62 on the inner door panel l4. By pressing the button 6| the window sash |5 rises but when the window reaches the top the cam 3| opens the circuit regardless of whether or not the operator has released the button 6|.

We are aware that members similar to 26 have been associated with the window pane for the purpose of directly engagingspring levers of electrical switches in order to open an electrical circuit and stop the motor drive to the window sash. Our present invention is an improvement over such mechanisms in that when the window sash reaches its full limit of travel the switch is opened and maintained in its normal open position without any strain being maintained on the switch elements once the finger button 6| is-released.

In other similar devices the switch is left in an stop the window pane exactly in the right spot- 1 and at the same time prevent the window pane from making a crash stop in its slide ways which is very undesirable for obvious reasons.

Finger push buttons similar to SI and 52 may be arranged on the automobile panel in addition to the door buttons if desired so that the driver may operate any window in the vehicle this being a simple matter of wiring circuit.

When the window pane starts to move downwardly, the rod 21 is allowed to drop back and the cam 3| is returned to the neutral position shown in Fig. 4 due to the action of the equalizing springs 51 in which position the pin 41 is free to move up or down depending on which solenoid is energized. In such position the window pane may be moved up or down from any mid-way position between its upper and lower limits but when the upper or lower limit is reached the electrical circuit in this direction is opened and locked so that no current can be admitted to the motor l8 except in a reverse direction which requires the operation of the other door panel but- In Fig. we have indicated a wiring diagram of the electrical circuits used. At M we have indicated the reversible motor [8, F, F indicates the field coils of the motor M, and A indicates the armature of the motor which is grounded to the battery B. The various contact points of the switch are given like numbers, as in the various figures illustrating the switch as is the case with the other elements shown,

Referring to the wiring diagram in Fig. 5, if the switch S which is grounded is contacted with button 6i the throw member 45 drops down against the solenoid 39 which is now energized from the battery B. Electrical current now flows from the battery B through the points 44 to 55 to B2 and thence through the motor field coils to points 56 and 43 and thence through the motorarmature A to the ground side of the battery B. when the switch S is connected with the button 62 the solenoid 38 is energized throwing the points 43 and 44 against the points 52 and ii respectively reversing the flow of current through the field coils of the motor M thereby reversing same.

Having thus described our invention what we claim as new is:

1. In an electrical switch mechanism having a magnetically operated throw lever normally pivoted midway between opposed solenoids, the said lever being provided with contact portions, the said solenoids and pivoted throw lever being mounted in a supporting frame member, an extension portion located on said pivoted throw lever extending through an elongated slot located in one side of said frame, a cam member having an internal track pivoted on one side of said frame, the said cam track having a low central portion with high track portions located on each side of the low central portion, said extension portion connected to said pivoted th'row member extending out through said frame slot and said cam track, means connected with said pivoted cam member for swinging said cam on said frame for the purpose of disengaging said contacts on said pivoted throw lever with either of said solenoids when said cam is pivoted to the right and left-hand side of the said frame.

2. In an electrical switch mechanism having a. magnetically operated -throw lever normally pivoted midway between opposed solenoids, the said lever being provided with contact portions, the said solenoids and pivoted throw lever being mounted in a supporting frame member, the said throw member having a pin extension portion extending out through an elongated slot located in said frame, a cam member pivoted on one side of said frame and having a cam slot located therethrough, said pin extension portion of said throw member projecting out through said cam slot, the said cam slot having a central low portion with high portions located at each side, means for swinging said cam on said frame and engaging said pin extension portion and forcing said pivoted throw lever contact portions out of contact with either of said solenoids.

3. In an electrical switch mechanism having opposed solenoids and an interposed pivoted throw lever provided with contact portions attractible to said solenoids when said solenoids are electrically energized, the said throw member and solenoids being mounted in a frame having a slotted opening in one side and an extension member connecting with said throw member projecting through said slot, an internal cam member pivoted on the outside of said frame and having an internal cam slot located therein and over said extension member, said cam slot having a low central portion and high portion located on each side of said low portion, means for swinging said cam member and forcing said extension member and throw lever contact portions out of contact with either of said solenoids.

DANIEL L. CHANDLER. FRANK H. WALKER. GEORGE w. EWING.

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