US1103916A - Electric make-and-break device. - Google Patents

Description

G. B. LAWRENCE. ELECTRIC MAKE-AND BRBAK DEVICE.

APPLICATION FILED SBPT.25,1912.

Patented July 14 1914.

2 SHEETS SHEET 1;

G E. LAWRENCE.

ELECTRIC MAKE-AMJ-BILEAK DEVICE.

APFLIOA'lION FILED SEPT.25,1912. 1,103,913 Patented July 14,19z4

and the lnpmentary and positive1nnke-andbreak of another contact by similar revolurecording "tion.

GEORGE E. LAXVRENCFE, OF PBILADELPI'HA, PENNSYLVANIA, ASSIGNOR TO HYDRO MANUFACTURING COM?ANY, TION OF PENNSYLVANIA.

03: PHILADELPHIA, PENNSYLVANIA, A CORPORA- ELECTR-IC MAKE-AND-BREAK DEVICE.

Application filed To all whom. it may concern:

Be it known that I, Grouse E. Lnwnnnon, a citizen of the United States, residing atlliihrdclphim in the county of Philadelphia and State or Peuns 'lvania, have invented certain new and useful Improvements in Electric Make-and-llruik Devices, of which the following is a specification.

My invention relates to those devices \\'hich have for their object the make-andbrcak of an electric circuit.

Specifically my invent-ion provides for the momentary and positive inake-and-break of one electric contact. by continuous or irregularly interrupted revolution in one direction tion in thc-op ;)osite direction, by which various results may be attained, such for 1nstance, as the operation of an automatic water-level recording device at a distance, it

may be of several miles, from the point at which the water-levels are taken.

By my invention a rotating body or wheel which may turn or run in either direction with an intermittent or continuous movement [8 caused to close circuits for short inthese circuits may be employed for dnpli; catingat a distance, the movements of the wheel .or body.

I. will describe my invention in connect on with a water-level recordinginstrument, although it will be understood that. I donot -1n any way limit my invention to that use. My. invention will'be' clearly understood from the following description and the a'c-' portions of a front elevation showing normal position of electric contact trips, and Fig. 5, 1s a diagrannnatgtfvle r of. awater level 9, is a contact wheel attached to the shaft 7.

10, is a set screw by which the s rocket wheel isheld from rotation on the s aft.

51166151281101} of Letters Patent.

ajwparatns cmbodving my invcn- The shaft 7 is czirried by brackets -11,'

mounted on a base 12, of non-conducting materiz-nl, one of said brackets carrying also the binding post 13 which isinclectric eon- ,i'iection'with the contact wheel 9.

14 and 14 are metal supports projecting from the base 12 on either side-of the contact wheel. Piroted on these supports are trip levers 15, 15 which have pivoted at their inner, shorter ends, trips or dogs'lti and 16 of non-conducting materinll The outer, longer arms of the trip levers 15 and 15- nornially rest upon stops 17 and 17, so that the trip levers lie iirpractical alinement n either side of the center of the contact wheel. The dogs or trips 16, 16 have outwardly projecting tails which are nor-- mally held against stops 18, 18 by springs 19, 19, as' shown iii-Figs. 1 and 4E. The inner ends of the trips 1 6, 16 project toward each other and lie in the path of pins 20 which project from the faces of the rim of the contact wheel. The outer periphery of the contact wheel has cut away port-ions, leaving raised contacts or teeth 21 located angularly midway between the pins 20. Contact springs 22, .ZQfi carried by the tr o tervals of time and again break them, thus avoiding waste at electrical energy, and

they just escape making. contact with the ra ed contactsill when the trip lovers are lying at rest on stops 17, 17. Howc\'er,

when one of the trip levers is turned on its pivot, from the position of 15, in Fig. 4, to-

that in Fig. 1, the are described by the end of the Contact spring allows it to, wipe one of the raised contacts 21, will be .described, thereby making temporary electrical contact between binding-post 13 and binding posts 2 or 23*, on the supports 1st, 14.

-As' shown in Fig. 1, the chain 24 acting on the sprocket wheel turns the contact wheel 9 in, for example. the direction of the arrow, and one of the pins 30 operating on the trip 16 has turnwl lt'Yvr 1.5 as shown. In its movement so far, the. contactspring 22 has turned tha g1 "(hr above .menlioncd are. but no contact was made as th contact wheel at'the instant rcseo.ted a cut away portion to thecontactspring. A slight further turn. of the contact wheel beyond that shown in Fig. 1 will allow the trip 16 to pass the pin 30, the long arm of the trip lever being of Patented July 1 1914. d September 25, 19x2. Serial No. 722,228.

rest on stop 17 and in this return motion'of the trip lever, the contact spring returning throughlth'e above mentioned arc, finds a -raised contact 21 presented to it and momentarily closes electric connection between binding posts 13 and 23. In the meanwhile a pin,20 on the opposite side of the contact wheel, has operated on trip 16?. In this 'ne't on is made.

case,'however, the trip is=merely turned'on its'pivot until'it is freed from the pin 20,

when spring 19", returns it to its normal position against stop 18 and no electric conp In the reverse rotation of the cpntact wheel exactly similar ,action' takes place, only in this case trip lever is turned and contact spring 22" closes the electric connection between binding posts 13 and 23", trip 16 meanwhile turning on its own pivot.

a In the use to which this device may be put'as exemplified in Fig. 5, it is'mou'nted on the stationary frame. work a, arranged above the water, whose level it is desired to record. One of the reaches of the chain 24 carries a float b, resting. on. the surface of the water. An open ended pipe 0 protects chain and float-from surging and outside influences, [Theother reach of the chain 24 carries. a counterweightd and is similarly protected-by a pipe e.

f,'is a convenient form of chronograph, consisting of a paper carrying cylinder 9 rotated by clockwork and a recording pencil 12, carried on a worm i which is'rotated by a ratchet wheel 9'.

k, m, are solenoids. carrying pawls which operate on either side of the ratchet wheel 7'.

The chronograph may be located in the .ofiice orlin any similarly .convenient place which'may be at a distance of several miles from the point where the water level is beingmeasured, and the solenoids k,'m, may be connected electrically with the binding 'posts on mymake-and break device .in the following manner: 1 and 'o'are relaVs hav ing one of the ends of their coils connected by conductors or wires p and g, with the binding posts 23, 23. Awire or co uctor 'r-,-leads from the binding post 13, through a batteryor source .9 to the opposite ends of lug the contact wheel 9 in one direction or the other, and making a temporary circuit through wires 7) and 1', or wires g and r. Tl'llS electric pulsati n or c-ircuitof short duration is relayed on to either solenoid I: or m, which acts to rotate the ratchet wheel 7', and either raise or lower the position of the recording pencil h. As the level of the water continues to rise or fall, successive contacts are made on one side or other of the contact wheel, and electric pulsations carry the action to the chronograph, and move the pencil up or down. The step by step mdtion of the contact wheel is in this way to act atvariations of one-half inch in the level of the water,'or less if desired. The

speed of passage of the contact spring 22-or.

22, inits contact are depends upon the weight of'the long arm of its trip lever,

exactly duplicated in the distant ratchet wheel of the chronograph, and may be made which may be made just sufficient to give the desired length of contact of the spring with the raised contacts 21.

- Having now fully described my invention, what I claim is:

1. An electric make-and-break device comprising the combination of a wheel revoluble in two directions and having on its rim contact teeth spaced apart, a pair of pivotal levers having contacts clear-mg said teeth when the levers are in normal position, and complemental projections on the wheel and movable dogs on the levers whereby upon rotation of the wheel one of said levers is turned and released to make momentary wiping contact and the other lever remains at rest in its normal position, substantially as described.

2. An electric make-and-break device comprising the combination of a revoluble .wheel having on its rim contact teeth spaced apart, a pivotal lever tending to return to normal position andprovided with acontact clearing said'teeth when the lever; is in normal position, and means operated by the revolu tion of the wheel and adapted to turn said lever with its contact between and clear of said teeth, and then to release said lever and permit it in returning to normal position to wipe its contact over and'past a tooth.

'3. An electric makeand-break device comprising a toothed contact wheel rotatable in two directions, a vibratory contact normally out of range of the wheel and provide with means for causing it to wipe a tenth of the wheel, and means inoperative when the wheel turns in one direction and operative when the wheel turns in the other direction to shift the contact and release it and permit it to automatically Wipe a tooth, substantially as described.

GEO. E. LAWRENGE.

Witnesses:

A. B. STOUGHTON, CLIFFORD K. CASSEL.

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