US1920688A

US1920688A - Electric controlled timing device

Info

Publication number: US1920688A
Application number: US302106A
Authority: US
Inventors: Harrison H Fogwell; Charles H Judd
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-08-25
Filing date: 1928-08-25
Publication date: 1933-08-01
Anticipated expiration: 1950-08-01

Description

Aug. 1, 1933.

H. H. FOGWELL ET AL ELECTRIC CONTROLLED TIHING DEVICE Filed Aug. 25, 1928 2 Sheets-Sheet 1 z IO@)0.

.IN VEN TORS Harmen/v H, Foswx-LL CHR ruf: H. Juan BY W4 Ml! ATTORNEY.

Aug. 1, 1933. H. H. FoGwELL Er Al. 1,920,588

ELECTRIC CONTROLLED TIMING DEVICE Filed Aug. 25, 1928 2 Sheets-Sheet 2 ill IN VEN TORS. Hann/:olv H. Foawn.:` Cif/uu: H Juan Il (C )4l-46 A TTORNEY. l

`Patented Aug. 1, 1933 PATENT OFFICE ELECTRIC CONTROLLED TIMING DEVICE HarrisonV H. Fogwell and Charles Il. Judd, Los Angeles, Calif.

Application August 25,

8 Claims.

This invention relates to a timing device as applied to the circuit of an electric motor, by means or" which the motor may be cut in and out of operation intermittently and without supervision.

- The objects of the invention are; rst, to provide a simple and effective timing mechanism for an electric circuit; second, to so combine the elements that the movements of the timing mechanism shall, control the circuit of the electric motor of a pump; third, to provide a means whereby the operations or" the motor shall be intermittent and variable as to time intervals; and fourth, to eliminate' all personal supervision.

Heretofore, `oil well operators have experienced diiculties in the operation of their pumps, in that many Wells do not have sufcient flow to allow of continuous pumping, but must be pumped dry, then allowed to rell and then pumped again. It was found that if the pump were operated intermittently at one hour intervals, Yor for an hour and then restedfor two hours, or for whatever periods of operation and rest the particular well in question might demand, the production of the Well Was materially increased. Because such intermittent control involved considerable attention and reliancefon the unreliable human element, the automatic `control herein disclosed was adopted.

Though'the invention relates primarily to the 30 operation of pumps for Wells, it is to be understood that the principle may be used in many `other relations, and-it is intended that the claims herein made shallnot be limited to said primary purpose any further than their specic language renders such limitation necessary.

-The invention is illustrated in the accompanying drawings, in which,

Fig. 1 is a front elevation of the entire mechanism, the cover or" the cabinet being removed; 40 Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1; Fig. 3 is a sectional view taken on line 3-3 of Fig. 1; Fig. 4 is a sectional View oi the timing mechanism taken generally on line 4-4 of Fig. 1; Fig. 5 is a diagrammatic view of the electric circuits employed, and Fig. 6 is a fragmentary view of a modiiication of parts oi' the timing mechanism.

Referring rst to Fig. 5, M indicates an electric motor. purposes, its primary use is for driving a pump for an oil well W. The motor is in what may be termed the main circuit, the conductors of which are lshown at a and b. This is usually a high voltage circuit. It is opened and closed automatically at predetrmined time' intervals by a switch While this motor may be used for other,

1928. Serial No. 302,106

which is operated by a timing mechanism in an auxiliary controlling circuit, the leads' of which are shown at c and d. This auxiliary circuit is preferably of a relatively low voltage.

In Fig. 1 Vof the drawings, A is a suitable casing enclosing the operating parts of the device, and 1 is the usual electric switch of the low voltage, auxiliary circuit, c and d. When the switch is turned on, it throws a current through Vthe fuse 2 and the wire 3 to the terminal 4 of the clock mechanism, which is indicated generally at 5. From the terminal 4, the current passes through the arbor 6 andthe hour hand 7, on which are two wiping contacts 8 and 9 which pass, in their orbits, over concentric rows of apertures 10 and 1l in the dial 12 of the clock, which dial is made of suitable insulating material.

Within the

apertures

10 and 11, and countersunk below the face or the dial, are metallic inserts forming contacts points land 14, respectively which connect at their lower ends with metallic rings 15 and i6, said rings being set within the lower or inner side of the dial 12, whereby they are insulated from the clock mechanism and from each other. The hand contacts 8 and 9, which are of spring material, bear upon the dial face except when they reach their respective apertures 10 and 1l when they Asnap into position to engage with their respective dial contact points.

Thus, when the hand contact' snaps `into any of the apertures l0 containing a dial contact point 13, an electrical connection is established to the ring 15, and the current passes from said ring, Vthrough a wire 17, to a leaf spring contact 18. Similarly, when the hand contact 9 snaps into any one of its apertures 11, it establishes connection,'through its respective dial contact point 14, with the ring 16 and, through a conductor 19, to another leaf spring contact 20.

As will be noted from Figs. 1 and 5, the

apertures

10 and 11 in the dial are in staggered arrangement so that the hand contacts f8 and 9 reach them at different times and in alternation. At no time will both hand contacts close with their dial Contact points 13 and 14 simultaneously. The apertures will be spaced about the dial so as to give the desired time intervalsV to 4the closures of the circuit through the

leaf spring Contact

18 and 20. As shown in Fig. 1, the time interval is one-half hour. Exactly on the hour, the contacts 9 ,and 14 close; then at the halfhour, the contacts 8 and 13 close. As indicated in Fig. 5, the apertures 10 and `11 may `be closely spaced so as to provide for short time intervals. The dial contact points 13 andi14 are preferably m l m mmww.,

is Pl u mfsid les adx m forming themqsyf 5. in the manner describd. it:V will be t 5 md hun the said les is members coq. oi'theswith in the main circumgid s being operaid @91.06 Ehe mim m' Y whnftlie said armature is attracted ,I K the said "armature carrigr in either les 38 ieg moves pn'e spring no xxtagtIavvazspzirox'n tjag- IML w. m m m m m mi M mmm nu www d holdingjhe said switch pchgoteiec a switch mated by the cloud positions.

e w mm mm www clock Plum rnsement in s ail with. the mk their sto-arranged the l i 'mlbe mmf si www wm, mmm

m m m 15s mmmxtpsibietoremoveme the orreadjustthem spring contact to engage with its cooperating contact point.

2. In an electric system, the combination of a main circuit, a switch in said circuit, an auxiliary circuit, a pair of electromagnets in parallel arrangement in said auxiliary circuit, an armature for one of said electromagnets, a pivoted carrier for said armature, a pivoted leg yieldingly connected with said carrier and rocked with the latter as lthe armature is moved, a pair of spring contacts in the circuits leading to said electromagnets, said spring contacts being on opposite sides of the said leg so as to be operated by the latter in opposite directions as the said leg is rocked, resilient switch members yieldingly connected with the armature carrier and forming the movable parts of the switch in the main circuit, said members being operated to close the main circuit when the said armature is attracted, means for temporarily holding the switch members under stress in their closed positions, and means under control of the other electromagnet for releasing the said switch members and breaking the main circuit, the said leg and the cooperating spring contacts being so arranged that, upon the movement of the said armature carrier in either direction the leg moves one spring contact away from its cooperating contact point and permits the other spring contact uto engage with its cooperating contact point.

3. An electric system comprising a main circuit of high voltage having normally open contacts therein, an auxiliary circuit of low voltage having branches in parallel arrangement, an electro-magnet in one of the branches of said auxiliary circuit, an armature for said electromagnet, a frame, connections between the armature and said frame, means operable by said frame when the electro-magnet is energized for closing the contacts in the main circuit, a latch for holding the said means in closed position, a second electro-magnet in another branch of the auxiliary circuit for releasing the latch to break the main circuit, and means under control of the said frame for causing the said electro-magnets to be energized in alternation.

4. An electric system comprising a main circuit of high voltage having normally open contacts therein, an auxiliary circuit having branches in parallel arrangement, an electro-magnet in one of the branches of said auxiliary circuit, a pivoted armature for said electro-magnet, a frame pivoted coaxially with the said armature, connections between said armature and frame through which the latter is moved in one direction by the armature, means carried by said frame for closing the contacts in the main circuit when the magnet is energized, a latch for holding the frame in position for maintaining the contacts closed, a second electro-magnet in another branch of the auxiliary circuit for unlatching the said frame and permitting the closing means thereon to open the said contacts, and means under control of the Ysaid frame for switching the current in the auxiliary circuit from one electro-magnet to the other in alternation.

5. An electric system comprising a main circuit of high'voltagev having normally .open conltacts therein, a switch for controlling said circuit, an auxiliary circuit of low voltage having branches in parallel arrangement, an electromagnet in one of the branches of said auxiliary circuit, a pivoted armature for said electro-magnet, a pivoted frame, said frame carrying the said switch whereby when the said electro-magnet is energized the switch is closed, resilient connections between the said frame and amature, a latch for holding the switch in its closed position with the said resilient connections under stress, a second electro-magnet in another branch of the auxiliary circuit for unlatching the switch to cause the latter to break the main circuit, and

eans under control of the said pivoted frame for causing the said electro-magnets to be energized in alternation.

6. An electric system comprising a main circuit or high voltage, a switch for controlling said circuit, an auxiliary circuit of low voltage having branches in parallel arrangement, an electromagnet in one of the branches of said auxiliary circuit, a pivoted armature for said electro-magnet, a frame pivoted coaxially with the said armature, said frame carrying the said switch whereby when the said electro-magnet is energized the switch is closed, resilient connections between the said frame and armature, a latch for holding the armature in its closed position with the said resilient connections under stress, a second electro-magnet in another branch of they auxiliary circuit for unlatching the armature to cause the switch to break the main circuit, and means under control of the said pivoted frame for causing the said electro-magnets to be energized in alternation.

7. An electric system comprising a main circuit of high voltage having normally open contacts therein, an auxiliary circuit of low voltage havingbranches in parallel arrangement, an electromagnet in one of the branches of said auxiliary circuit, a pivoted armature for said electro-magnet, a frame connected with and movable with said armature when the electro-magnet is energized, electrically connected spring contacts carried by said frame and adapted Yto close against and connect the contacts of the main circuit when the electro-magnet is energized and the said frame is moved, a latch for holding the armature and the spring contacts in their closed positions, a second electro-magnet in another branch of the auxiliary circuit for unlatching the armature and for causing the spring contacts to break the main circuit, and means under control of the said frame for causing the said electro-magnets to be energized in alternation.

8. An electric system comprising a main circuit of high voltage having spaced contacts therein, an auxiliary circuit of low voltage having branches in parallel arrangement, an electromagnet in one of the branches of said auxiliary circuit, a pivoted armature for said electromagnet, a frame pivoted coaxially with said armature, resilient connections between the frame and armature, electrically connected spring contacts carried by said frame and adapted to close against and connect the spaced contacts of the main circuit when the electro-magnet is energized and the said frame is moved, a latch for holding the armature and the spring contacts in their moved position with the said resilient connections under stress, a second electro-magnet in another branch of the auxiliary circuit for unlatching the armature and for causing the spring contacts to break the main circuit, and means under control of the said frame for causing the said electro-magnets to be energized in alternation.

HARRISON H. FOGWELL. CHARLES H. JUDD.