US1078058A - Timing device. - Google Patents

Description

G. R. MOORE.

TIMING DEVICE.

APPLICATION FILED NOV. 27, 1912.

1,07 ,05 Patented N0v.11,1913.

WITNESSES: INVENTOR.

g 8W ATTORN Y.

COLUMBIA PLANOGRAPH CO, WASHINGTON, u. c.

CHARLES R. MOORE, OF LA FAYETTE, INDIANA.

TIMING DEVICE.

Specification of Letters Patent.

Patented Nov. 11, 1913.

Application filed November 27, 1912. Serial No. 733,817.

To all whom it may concern:

Be it known that 1, CHARLES R. Moonn, citizen of the United States, residing at La Fayette, in the county of Tippecanoe and State of Indiana, have invented a certain new and useful Improvement in T iming Devices, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention has for its direct object the formation of an improved timing device or clock though features are included which are not to be limited to their use in connection with timing devices. When the invention is embodied in a timing device it is employed as a motion maintaining apparatus to maintain the oscillation of a timing pendulum and the invention when thus embodied may be generally described as including an oscillating pendulum, a magnet for pulling the same toward the vertical, a second magnet differential with respect to the first and means for bringing the two magnets in magnetic opposition when the pendulum is at vertical to permit it to continue its swing in the direction in which it was initially drawn by the first magnet, such operations desirably accompanying the movement of the pendulum in each of its directions. In the preferred embodiment of the invention one of the differentially related magnets is preferably in the form of a permanent horseshoe magnet and the other of these magnets is desirably an electromagnet in which case the permanent magnet is preferably swingingly mounted so that in addition to magnetically attracting an armature carried by the pendulum it will also be turned as a consequence of such attraction when the pendulum approximates the vertical thereupon to operate a switch for closing the circuit of the electro-magnet sufficiently to counteract the tractive effect of the permanent magnet upon the pendulum armature to permit the pendulum to swing in the direction in which it was previously pulled by. the permanent magnet beyond the Vertical to the other limit of its stroke, this magnet circuit being opened when the pendulum is swung sufficiently beyond the vertical so that the permanent magnet may again pull upon the armature provided upon the pendulum to reverse the pendulum motion. I

I will explain my invention more fully by reference to the accompanying drawing showing the preferred embodiment thereof as employed in connection with a timing device and in which drawing Figure 1 is a side elevation of the apparatus, a portion of the pendulum being broken away; Fig. 2 is a side view of the structure shown in Fig. 1; Fig. 3 is a sectional elevation of a part of the structure shown in Fig. 1 taken on a plane which includes the axes of electro-magnetic coils; and Fig. 4 is a diagrammatic view illustrating a circuit which may be employed.

Like parts are indicated by similar charactors of reference throughout the different figures.

The pendulum 1 is swingingly mounted at its upper end in any usual or preferred way and carries at its lower end a pendulum bob 2, it being understood that the pendulum is in driving relation with either a timing electrical contact or a gear train in actuating relation with any suitable timing indicating device such, for example, as clock hands. The pendulum bobs are usually made of non-magnetic metal and in such event a soft iron armature 3 is carried by the pendulum and in effect forms a part of the pendulum and its bob. A magnet (desirably a horizontally disposed permanent magnet) 4 is pivotally mounted at 5 upon one side of the vertical line that includes the point or axis about which the pendulum oscillates, the poles of this magnet intercepting such vertical line. The polar ends of the magnet 4 preferably have magnetic attraction for the armature 3 through the intermediation of upright soft iron polar extensions 6 each evenly distributed upon both sides of the vertical line including the axis of oscillation of the pendulum, whereby tl e pendulum armature 3 is attracted by the permanent magnet with equal force in both directions of swinging movement of the armature. The relationship of the pendulum armature and permanent magnet is such that the permanent magnet will not move upon its pivot 5 until the pendulum has sufficiently approached its vertical posi tion or that position where the attraction of the permanent magnet for the armature is to be sufficiently decreased to permit the pendulum properly to continue its movement. l l hen the pendulum has thus suf ficiently neared its vertical position in either of its directions of movement the permanent magnet 4 is swung u wardly upon its pivot 5 to bring the switch contact 7 carried by the magnet into en agement with a contact 8. The contacts 7 and 8 constitute the terminals of circuit which includes the battery or other suitable source of current 9 and a winding subdivided into two coils 10, each coil surrounding a soft iron polar extension 6 and being illustrated as moving with the permanent magnet but which characteristic may obviously be modified. When this circuit is closed the magnet 10 serves suliiciently to demagnetize the polar extensions 6 suthciently to reduce the magnetic attraction between these polar extensions and the armature to permit the pendulum to continue in movement. It counterweight 11 is so selected or adjusted that the permanent magnet may remain elevated during a ncc essary portion of the movement of tl e pendulum properly to permit the continuation of the pendulum movement beyond the vertical, a result which is accomplished by so adjusting the dir'lerential relation of the magnets i and 10 that the polar extensions 6 are not entirely demagnetized to permit the polar extensions 6 to keep part of their hold upon the armai'zure 3 until the pendulum has swung sulliciently beyond the vortical whereupon the magnet ill resume its horizontal position, being ii. i. ed in its return movement by a stop 19 When the magnet has resumed its horizontal position the circuit for the electro-magnet 10 is open at 78 so that the magnet t may in pull upon the armature 8 to rd the progress of the pendulum towarc the limit of its stroire, it this action be desired, and cause its return movement. A secondary clock 13 may be included in the circuit of magnet 10.

he magnet i is shown as being made of hard steel that has leen subjected to the magnetizing influence a coil so as to be permanently magnetized without the continuing presence of a magnetiz ig coil. 1 do not wish to be limited, however, to a magnet formed of hard steel thus permanently magnetized and which lacks a constantly energized ccil for imparting magnetization permanently to the magnet. it therefore use the term permanent magnet in the broad sense of a permanently or constantly magnetized bar or body irrespective of the method employed for imparting the permanent ma gn eti .1: ation.

ll hile l: have ierein shown and particularly described the preferred embodiment of my invention 1 do not wish to be limited to the precise details of construction shown as changes may readily be made without de parting from the spirit of my invention, but

Having thus described my invention I claim new and desire to secure by Letters Patent the following l. A motion maintaining apparatus includin a pendulum; an armature carried by the pendulum; a swingingly mounted permanent magnet provided with a soft iron polar extension or extensions that cooperate with the ar nature to pull the pendulum; an electro-m agnet winding in partial demagnet izing relation with said polar extension or extensions; and an energizing circuit including the electro-magnet winding and a switch which is operated by the permanent magnet to close the circuit when the permanent magnet is moved at its portion where the electro-magnet winding is provided, upon the suiliciently close approach of the armature toward the permanent magnet sufficie tly to reduce the pull of the permanent iet upon the pendulum armature during a limited portion of the pendulum motion whereby the pendulum may continue in the direction in which it is pulled by the permanent magnet.

2. A motion maintaining apparatus including a pendulum; an armature carried by the pendulum; a swingingly mounted pernmnent magnet cooperating with the ar nature to pull the pendulum; an electro magnet winding in diitliercntial relation with the permanent magnet; and an energizing circuit including the electrounagnet winding and a switch which operated by the permanent magnet to close the circuit when the permanent magnet is moved at its portion where the electro-magnet winding is provided, upon the sufficiently close approach oi the armature toward the permanent magnet sul'liciently to reduce the pull of the i'ermanent magnet upon the pendulum armature during a limited portion of the pendulum motion whereby the pendulum may continue in the direction in which it is pulled by the permanent magnet.

3. A motion maintaining apparatus including a pendulum; an armature carried by the pendulum; two differentially related magnets, one cooperating with the armature to pull the pendulum and the other, which is an electro-magnot, serving to counteract the ell'ect the first to reduce the pull upon the armature during a limited portion of the pendulum motion, the magnet that pulls the armature being movably mounted; and an energizing circuit for the electro-magnet which includes a switch which is closed by the movably mounted magnet when moved upon the suiiiciently close approach of the armature thereto.

l. A motion maintaining apparatus ineluding a pendulum; an armature carried for the electro-magnet which includes a switch which is closed by the pendulum pulling magnet in cooperation with the pendulum when it has approached the pulling magnet sufiiciently close.

5. A motion maintaining apparatus including a pendulum; an armature carried by the pendulum; two diflerentially related magnets, one cooperating with the armature to pull the pendulum and the other, which is an electro-magnet, serving to counteract the eifect of the first to reduce the pull upon the armature during a limited portion of the pendulum motion; and an energizing circuit for the electro-magnet which includes a switch governed by the pendulum and closed thereby when it has sufliciently approached the pendulum pulling magnet.

6. A motion maintaining apparatus including a pendulum; an armature carried by the pendulum; two differentially related magnets, one cooperating with the armature to pull the pendulum and the other serving to counteract the effect of the first to reduce the pull upon the armature during a limited portion of the pendulum motion; and means governed by the pendulum for bringing the counteracting magnet into service when the pendulum has sufliciently approached the pendulum pulling magnet.

7. A motion maintaining apparatus including an armature; a magnet for and in moving relation to the armature for effecting operation of the motor; a second magnet, which is an electro-magnet, in differential relation to the first; and an energizing circuit for the electro-magnet including a switch governed by the first magnet and its armature and closed when the first magnet and its armature have been brought into sufliciently close proximity.

8. A motion maintaining apparatus including an armature; a magnet for and in moving relation to the armature; a second magnet, which is an electro-magnet, in differential relation to the first; and an energizing circuit for the electro-magnet including a switch which is closed by the motion maintaining apparatus when the first magnet and its armature have been brought into sufiiciently close proximity.

9. A motion maintaining apparatus including an armature; a magnet for and in moving relation to the armature; a second magnet in differential relation to the first; and means governed by the motion maintaining apparatus for bringing the second magnet into action when the first magnet and its armature have been brought into sufiiciently close proximity.

10. A motion maintaining apparatus including an armature; a permanent magnet for and in moving relation to the armature; a second magnet, which is an electro-mag net, in differential relation to the first; and an energizing circuit for the electro-magnet including a switch governed by the first magnet and its armature and closed when the first magnet and its armature have been brought into sufliciently close proximity.

11. A motion maintaining apparatus including an armature; a permanent magnet for and in moving relation to the armature; a second magnet, which is an electro-magnet, in differential relation to the first; and an energizing circuit for the electro-magnet including a switch which is closed by the motion maintaining apparatus when the first magnet and its armature have been brought into sufiiciently close proximity.

12. A motion maintaining apparatus including an armature; a permanent magnet for and in moving relation to the armature; a second magnet in differential relation to the first; and means governed by the motion maintaining apparatus for bringing the second magnet into action when the first magnet and its armature have been brought into sufficiently close proximity.

In witness whereof, I hereunto subscribe my name this 25 day of Nov. A. D. 1912.

CHAS. R. MOORE.

Witnesses:

lV. F. MILLER, B. D. MoCoNNELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G.

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