US1235551A - Test-indicator. - Google Patents

Description

A. G. CASH. TEST mo'lcAToR.'

APPLICATION FILED DEC. 23. |916.

o I 1,3 9 [8 2 I I I m 3l .lltm Y di# may 4 2 V l `Patented Aug. 7, 1917.

2 SHEETS-SHEET I.

A. G. CASH..

TEST INDICATOR.

APPLICATION FILED DEC. 23. |916.

1,235,551 I Patented Aug'. 7,1917.

2 SHEETS-SHEET 2.

ALFRED G'. CASH, 0F ROCHESTER, YORK.

TEST-INDICATOR.

Specification of Letters Patent.

Patented Aug'. 7, 1917.

application inea December as, 191e. serial No. 138,624.

To all whom t may concern.'

Be'it known that I, ALFRED G. CASH, a citizen of the United States, andI resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in- Test-Indicators, of which the following is a specification.

The present invention relates to test indicators for indicating to a workman the amount to be removed from a work piece in4 order to obtain a desired surface, an object of this invention being to provide a construction in which the contact element-may be moved in either direction to producea movement of the indicating finger in one direction from its normal position without necessitating any adjustment of the internal parts of the instrument. f

To this and other ends, the invention consists of certain parts and combinations of parts all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the drawings Figure 1 is a view of one embodiment of the invention with the cover plate removed' and the indicating nger lying in a certain normal position;

Fig. 2 is a view similar to Fig. 1, showing the indicating finger moved to its eXtreme adjusted position by pressure on the contact finger in the direction of the arrow;

Fig. 3 is a view siLnilar to Fig. 2, showing the indicating ling| r adjusted to extreme position by pressure on the contact element in the opposite direction;

"Fig 4 is a longitudinal sectionall view through the instrument;

Fig. 5 is a transverse sectional view on the line 5 5, Fig. 4;

Fig. 6 is a front view of another embodiment partially broken away to show the interior; v

' Fig. 7 is a partial longitudinal sectional iew through the instrument shown in Fig.78 is a view similar to Fig. 1 of 4still another embodiment of the invention; `and l Fig. 9 is a detail'view showing a still further embodiment of the invention.-

Referring first to the embodiment -shown in Figs. 1 to 5, there is employed a vbase plate 1 whichgradually widens from one end to the other and .is supported in any suitable manner, as by a stud 2. This base plate has side flanges 3 which support a cover 4 held in place by screws 5. At one end of the base plate 1, a scale 6 is arranged, the cover being shorter than the base plate so as to expose the scale and the indicating finger or pointer 7 which operates over the scale, this indicating" finger or pointer being in the form of an arm extending from a pivoted part 8 which turns aboutan axis 9.

At the opposite end of the base 1, a contact element 10 projects, said 'element being preferably pivoted to .turn on a stud 11 and adjustably connected to apivotedl part 12. The connection in this instance is in the form of a bifurcation in the contact element, having its arms connected by a sleeve 13 which is surrounded by the plvoted part 12 and a friction washer 14, this adjustment permitting the contact element to be shifted -laterally in either direction, with reference to the pivoted part 12, by exerting a certain pressure on the contact element. Under or- `dinary conditions, the pivoted lpart 12 and the contact element are held in frictional engagement, so that the pivoted part 12 partakes of the movement ofthe contact element 10.

The connection between its pivoted parts 8 and 12 is such that the movement ofthe pivoted part 12 in either direction causes the pivoted part 8 to turn in one and the same direction from a certain normal position where it is held, by the spring 15 in a manner to be hereinafter described. In this embodiment, the part 8 is provided with two lateral projectlons 16 and 17 arranged on opposite sides of the pivot 9, the projection 16 being a slightly greater distance fromthe pivot 9 than is the projection 17', and said. projection also being so located that one face of one of the projections 16 is in alin'ement with the central line throughA or the longitudinal `axis of the pointer finger, while the opposite face of the projection 17 -is in alinement with said central line of action, said faces roviding `two points of engagement.

' The plvoted part 12 has one end bent or deflected at 18 on one side of its pivot 11 so that said end lies between the projections 16 and 17, and provides two points or surfaces 19 and 20 at different distances from the pivot 11, for coperating, respectively, with the points of engagement' or projections 16 and 17. The'spring 15 before mentioned is preferably in the form of an arm anchored at 21 and having its free end bearing against'thc projection 17, so that the indicating finger` or pointer 7 is normally held in a certain position at one end of the scale 6. j

It will be apparent that pressure in the-direction of the arrow in Fig. 2 will cause the point of engagement 19 to bear upon the projection 16 and swing the pointer or indicating finger 7 to the right against the action of the spring 15, while pressure on the contact element 10 inl the direction of the arrow, Fig. 3, will cause the point of engagement 20 to bear against the projection 17 and swing the indicating finger in the same direction as it is swung by the engagement between the point 19 and the projection 16.

In the use of the device the zero point of the scaleindicates that the work is correct. In this position of thel pointer the contact finger is engaged with the work and the spring is under tension. If too much material has been removed from the work at any point, the pointer will shiftin one direction, whereas, when more material is required to be removed from any point, the pointer will shift inthe other direction.

In the embodiment shown in Figs. 6 and 7, the parts are the same except that the indicating pointer 7 l is mounted upon a spindle 22 which is journaled in the base 12l and carries a pinion 23, which, in turn, is engaged byA a segmental gear 24 extending from the pivoted part 8. The scale 6a, instead of being formed upon the base 1, is arranged upon a disk supported at its edges in spaced relation to the base la, said pointer and disk being covered by a crystal 25 held in place `by a ring 26. This embodiment provides for a greater movement in the indicating finger and thus gives a wider range of reading.

In the embodiment shown in Fig. 8, the parts are the same as in Fig. 1', except that the pivoted part 12 has two fingers 19a and 20a at one side of its pivot, one of said fin-J,

gers coperating with the projection 16, andl the other offsaid fingers coperating lwith the projection 17 on the pivoted part 8. The operation of this device is the same as those shown in Figs. 1 to 7.

Instead of providing two projections o n the pivoted part 8, as shown in Figs. 1 to 8, two projections 19b and 19c may be' provided on the pivoted part 12, and the pivoted part 8 may extend between theseprojections and be provided with two points of engagement directions, the indicating finger is moved from a certain normal positioun against the action of a spring, preferably by providing direction.

two pivotedparts in the connection, each of said parts having two points of engagementv -other pair coperating when the. contact is moved in the opposite direction.

lVhat I claim as my. invention and desire .to secure by Letters Patent is 1. In an instrument of the class described, a contact element,` an indicating finger, a spring for maintaining the finger in a certain position, and connecting means between the contact element and the indicating finger having provision for moving the finger away from the certain position in one and the same direction on a movement of the Contact element in either of two opposite directions.

2. In an instrument of the class described, a contact element, an indicating finger, a spring for maintaining the finger in a certain position, and connecting means between the Contact element and the finger embodying two parts, one having two points of engagement either of which when engaged moves the finger in one and the same direction from the certain position, and the other being arranged to engage one of said points when the contact element is moved in one direction yand the other of said points when the contact element is moved in the other 3. In an instrument of the class described, a contact element, an indicating finger, a spring for maintaining the finger in a certain position, and connecting means between the contact element and the indicating finger embodying two parts each provided with two points of engagement, one of said points of' engagement on one part coperating with a' corresponding point on `the other part when the contact element'is moved.in one direction to move the nger awa-y from the certain position, and the other two points of engagement coperating when the contact element is moved in the opposite direction to move the finger away from the certain position in the direction inwhich dit was moved by the coperation of the first mentioned points of engagement.

4. In an instrument of the class described, a contact element, an indicating finger, a spring for maintaining said finger at acertain position, and connecting means between the contact element and the indicating finger comprising two pivoted parts, one of which has two projections thereon lying on opposite sides of thepivot of the part by which it isfcarried, andthe other of which carries two points for coperating with; said projections, one point with one side of one of said projections, and the other point with the opposite side of the' other projection.

5. In an instrument of the class described,

a contact element,an indicating finger, a

spring for maintainingsaid finger at a certain position, and connecting means between the contact element and the indicating finger comprising two pivoted parts, one of said parts having two points of engagement on opposite sides of its pivot, one of said points of engagement being situated a greater distance `from the pivot`than the other, and the other of said parts having two points of engagement situated on one and the same side of the pivot of said part, one being arranged further froml the pivot than the other and coperating with that point on the other part which is situated. a greater distance than the pivot of said other part, the coperation being such that when the contact member is moved inv one direction, one pair of coperating points shifts the indicating finger away from its normal position, and when the element is moved in the opposite direction, the other p air of coperating points shifts the indicating finger in the same direction away from normal position.

6. In an instrument of the class described, a contact element, an indicating finger, a

` spring for maintaining the finger in a certain position, and connecting means between the contact element andthe indicating finger 4comprising two pivoted parts, one of whlch is provided with two projections, and the other of which has a portion extending between the projections and is provided with two points of engagement for coperating with said projections, one of said pivoted parts having its pivot located between the points of engagement thereof, and the other of said pivoted parts having its pivot located to one side of the points of engagement thereof.

7 In an instrument of the class described,

a contact element, an indicating linger, a'

spring for maintaining the finger in a-certain position, and connecting means between the contact element and the indicating finger embodying two pivoted parts, one of which is provided with two projections on opposite sides of the pivot thereof, and the other of which is provided with two points of engagement located at different distances from the pivot of said parts, one of said points coperatingwith one side of one projection, and the othervof said points copverating with the opposite side ofthe other.

projection;

8. In an instrument of the class described, i

a contact element, an indicating finger, a spring for maintaining the finger in a certain position, and connecting means between the contact element and thev indicating finger embodying two pivoted parts, one ofwhlch has two projections extending therefrom on opposite sides of the pvot, and the other of which has a curved portion to one side of its pivot, extending between the projections to coperate with one face of one projection and the opposite face of the other projection.

ALFRED CASH.

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