US1349831A

US1349831A - Testing apparatus

Info

Publication number: US1349831A
Authority: US
Publication date: 1920-08-17
Anticipated expiration: 1937-08-17

Description

w.w. GRAMER. TESTING APPARfiTU S.

. APPLICATION FILED MAR. 8, I915.

Patented Aug. 17, 1920.

avwentoz I W 14 Gramei' general WALTER WESLIE GRAMER, 0F MARINETTE, WISCONSIN.

TESTING APPARATUS.

Specification of Letters Patent.

Patented Aug. 17, 1920.

Application filed March 8, 1919. Serial No. 281,567.

To all whom it may concern:

Be it known that I, WALTER W. GRAMER,

a citizen of the United States residing at Marinette, in the county of Marinette and State of Wisconsin, have invented certain new and useful Improvements in Testing Apparatus, .of which the following is a specification, reference being had to the ac companying drawings.

This invention relates to certain improvements in testing apparatus, and has relation more particularly to a device of this general character especially designed and adapted for use in connection with the ignition system of an internal combustion engine, and it is an object of the invention to provide a novel andimproved apparatus of this general character whereby it may be readily determined which of thefplugs may be faulty or dead and which also operates to determine trouble in the coil.

Another object of the invention is to provide a novel and improved apparatus of this character comprising normally closed circuit breakers interposed in the wires leading from the coil to the plugs and each of which circuit breakers is operable independently of the other,'together with spaced terminals forming a spark gap coacting with each of the circuit breakers, whereby the same may be placed in electrical connection with the coil when the circuit to a plug broken.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved testing apparatus, whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, 51$;Vl11 be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that myinvention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:

Figure l is a view in front elevation of a testing apparatus constructed in accordance with an embodiment of m invention.

Fig. 2 is a view in rear elevationof the device as herein embodied, with a portion broken away. i

Fig. 3 is a sectional view taken substan' tially on the line 33 of Fig. 1, and

Fig. 4 is a fragmentary longitudinal view taken substantially on the line l-4 of Fig. 3'.

As disclosed in the accompanying drawings, H denotes a housing havingi'disposed through a side wall 1 thereof a plurality of binding posts P adapted for electrical connection through the medium of the conductors or wires on with a coil box (not shown) preferably of the type employed in connection with the ignition system of the Ford automobile. Also disposed through this wall 1 is a second seriesof binding posts P adapted for electrical connection through the medium of the conductors or wires Z) with the spark plugs (not shown) of the motor proper. Arranged within the housing H is a shelf 2 having secured thereto the base members 3 in electrical connection with the posts P through the medium of the conductors or wires 0 and the securing members A for said base members 3.

Pivotallyengaged and in electrical connection with each of the base members 3 is a switch S. This switch comprises a pair of spring jawswhich normally engage the opposite faces of the flattened exten sion 5 of a post P extending within the housing H, so that direct electrical connection is normally maintained between the coil and a spark plug.

Extendingv between the jaws of each of the switches S is an end portion of a plug A having rectilinear movement through the second side wall 6 of'the housing H. The portion of the plu A arranged between the spring jaws of the switch is pivotally engaged therewith, as indicated at :7, so that upon imparting endwise movement to the plug A, the switch S will be engaged with or disengaged from an extension 5 of post P. When the post is inwardly disposed, the switch S is in engagement with an extension To facilitate the desired manipulation of the plug A, the outer endportion tlicreof is provided with a button 8 or the li (e.

The outer face of the side wall 6, below each of the plugs A, is provided with a recess or pocket 9 in which extends a pair of spaced

terminals

10 and 10 forming a spark gap. The terminal 10 extends within the housing H, as indicated at 11, so that when a plug A is moved outwardly or withdrawn, the coacting switch will have electrical engagement therewith.

All of the terminals 10 are connected in series and with a post P depending from the bottom of the housing H. The post P is 7 adapted to be suitably grounded through the medium of a comluctor or wi re d.

The extensions 5 of the post P and the portions 11 of the terminals 10 constitute contact members and, as hereinbetore stated, the switches S are normally in engagement with the extensions or contacts 5.

In the event of engine trouble, upon pulling out a plug A to cause the coacting switch to engage a contact 11, the plug connected with the concomitant post P will be cut out and a spark will be created between the

terminals

10 and 10 under control of such switch. it the spark thus created is thin and streamy, it will indicate that the trouble is in the distributer or coils or the conductor or wire a leading therefrom. If the spark should be good and when the plug A is pushed inwardly to engage the contact 5, and the coacting cylinder of the motor does not fire, the trouble is with the spark plug or the valves are not closing. 7

By pulling out three plugs A, resulting in the motor running on one cylinder, a thorough test is made of that cylinder while the sparks of the remaining cylinders may be determined. Each cylinder may, in turn, be tested in this manner.

From the foregoing description, it is thought to be obvious that a testing apparatus constructed in accordance with my invention is particularly well adapted tornse by reason of the convenience and facility with which it may be assembled and operated and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and tor this reason I do not wish to be understood as limiting myself to the precise arrangement and lfornniition of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

1 claim:

1. fix spark testing apparatus including a housing provided with an opening in one of its walls, a pair of spaced terminals extending within said opening and. torming a spark gap, one oi said terminals being grounded and ti 5 second of said terminals evtcnding within the housing to provide contact, a pair of contacts carried by the second wall ot the housing, adapted. to be interposed in a line leading from a coil to a plug, a movable contact member supported within the housing and in electrical connection with one of the last named contacts, said movable contact, when in one position, engaging the second of the last named contacts, and when in a second position contacting with the first named contact, and a member engaged with the movable contact and extending exteriorly ol the housing for imparting movement to the movable contact member.

A. spark testing apparatus including a housing provided with an opening in one of its walls, a pair of spaced terminals extending within said opening and forming a spark gap, one of said terminals being grounded and the second of said terminals extending within the housing to provide contact, a pair of contacts carried by the second all of the housing, adapted to be interposed in a line leading from a coil to a plug, a movable contact member supported within the housing and in electrical connection with one of the last named contacts, said movable contact, when in one position, engaging the second of the last named contacts, and when in a second position contacting with the first named contact, and a member engaged with the movable contact and extending exteriorly of the housing for imparting movement to the movable contact member, said member being pivot-ally engaged with the movable contact member and supported for substantially rectilinear movement.

3. A spark testing apparatus including a housing provided with an opening in one of its walls, a pair of spaced terminals extending within said opening and forming a spark gap, one of said terminals being grounded and the second of said terminals extending within the housing to provide contact, a pair of contacts carried by the second wall, of the housing, adapted to be interposed in a line leading from a coil to a plug, a movable contact member supported within the housing and in electrical connection with one of. the last named contacts, said movable contact, when in one position, engaging the second of the last named contacts, and when in a second position contacting with the first named contact, and a member engaged with the movable contact and extending exteriorly of the housing for imparting movement to the movable contact member, said movable contact member coniprising a pair of spring jaws having similar ends pivotally engaged within the housing, the contacts with which said spring jaws coact being received between said jaws.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

VALTER VVESLIE GRAMER Witnesses:

LAWRENCE BUNDY, MIKE SETUNSKY.