US2397300A - Work carrier - Google Patents

Description

March 26, 1946. D. TILTON 2,397,399

WORK CARRIER Filed March 17, 1944 3, Sheets-Sheet l IBY/%-WM.'

ATTORNEY S'Sheets-Sheet 2 INVENTOR. flay/q 771/817" ATTOI-ZNEY March 26, 3946. D. TILTON WORK CARRIER Filed March 17, 1944 March 26, 1946. Y TELTON Z,3@7,3@0

WORK CARRIER Filed March 17, 1944 5 Sheets-Sheet s BY%VVMM ATTORNMEY Patented Mar. 26, 1946 worn: CARRIER Danley Tilton, Los Angeles, Calif., assignor to Robert H. Clark, Los Angeles, Calif.

Application March 17, 1944-, Serial No.- 526,983

7 Claims.

This invention has to do with a work carrier in the nature of an adjustable work supporting table and it is a genera1 object of the invention to provide such a device involving various adjustment and which operates to eifectively and firmly support an object to be worked upon.

There are numerous situations in which it is desired to mount or support an object such as a unit to be worked upon so that that object is held firmly in a certain position. For example, quartz crystals such as are used in variou apparatus, must be cut from mother quartz and in order to do so the mother quartz is held While the cutting Operation is performed and it is highly important that the mother quartz be held very accurately at exactly the proper angle. The invention is particularly useful in carrying out operations such as crystal cutting. However, it possesses features and characteristics making it desirable and useful generally in a wide variety of situations and, therefore, it is to be understood that although the device described may be referred to as a support for carrying various sizes and shapes of mother quartz formations, or the like, the invention is not to be understood as thereby limited to any specific use.

It is a general object of the present invention to provide a deviceor unit of apparatus such as I have referred to which operates to firmly and securely carry an object to be worked upon. The device of the present invention involves numerous features of adjustment and construction by which the part are related for relative movement and yet are free of play that would otherwise result in errors as the device is used.

Another object of my invention is to provide a device of the general character referred to involving a series of adjustments whereby it is possible' to accurately or delicately adjust an object held by the device to precisely the angle or position desired.

A further object or the present invention is to provide a device of the general character referred to in which the part are shielded-or protected against grit or abrasives that may be present during operation, with the result that the mechanism maintains its accuracy over a long period of time.

The various objects and features of my invention will be fully understood from the following detailed description of a typical preferred form and application of the invention, throughout which description reference is made to the accompanying drawings, in which:

Fig.1 is a perspective of the mechanism-oi the present invention. Fig. 2 is adetailed transverse sectional view of the mechanism being a view taken substantially as indicated by line 2-2 on Fig. 1, certain of the parts being shown in elevation. Fig. 3 is a detailed transverse sectional 5 view taken substantially as indicated by line 33 on Fig. l. The device of the present invention involves, generally, a base to, a carriage I I mounted on the base for horizontal movement in a direction transverse of the base, a cros-shead l2 mounted on the carriage for horizontal movement in a direction transverse of the carriage, a vertical spindi l3 projectingupwardly from the crosshead, a body I4 rotatably supported on the spindle, a

porting the plate l5'on the body M, means ll for adjusting the plate l5 relative to the body l4, means IQ for operating the carriage'relative to the base [0, means ls for operating the crosshead relative to the carriage, and means 20 for releasably setting the body' against rotation on the spindle and various other features of arrangement and construction, all of which will appear from the following description.

The base I0 i designed to be placed on or secured to a foundation or stationary part of a mechanism such as a cutting or grinding mechanism, and to that end has a mounting flange 2! having a fiat bottom 22. The base l0 serves primarily as a support for the carriage H and serves to support the carriage so that it is movable or adjustable horizontally.

In the form of the invention illustrated the base 10 has a horizontally disposed guideway 22 which is on the upper side of the base or faces upwardly to guide and support the carriage II. In practice the base It may be formed or fabricated in any suitable manner. However, it is most convenient to make it a casting, as such construction is rigid and lends itself to the formation of a guideway that will effectively support the carriage.

The carriage H rests on and is, supported by i the guideway 22 of the base Ill. In the particular construction illustrated the guideway 22 of the base includes a pair of spaced rails the outer sides of which are undercut and the carriage H rests on the top of the rails and has depending parts 25 which engage in the undercuts so that the carriage is effectively retained on thebase. To compensate for wear and to maintain the proper fit between the carriage and the base I provide a bearing shoe 26 on one of the depending parts 25 65 to bear on the outer side of one or the rails ot work upporting plate l5, means It pivotally upat its upper 'side, which guideway includes a pair of rails similar to those provided on the base to support the carriage. The guideway 28 of the carrier extends horizontally and is disposed so that it is at right angles to the guideway 22 of the base.

The cross head I2 rests on and is slidably car-L --indicated in Fig. 3. i

ried by the guideway 28 of the carriage and is secured to the carriage by engaging the undercut rails and it has an adjustable shoe 29 fol taking up wear and for maintaining proper fit between the crosshead and carriage.

The vertical spindle I3 projects upwardly from g the crosshead and is preferably located so that its axis intersects that of the guideway. The spindle is provided to serve as'an effective support for the body I4 and is preferably made short'or limited as to its verticaldimension but as large as practical in diameter. This keeps the vertical height of the mechanism down'and yet provides an effective stable bearing for the body I4.

The body I4, together with the plate I5, the mounting means l3 and the adjusting means I1, forms a head supported by the structure thus far described. The body "I4 has a depending collar 30 finished to slidably receive the spindle I3. A flange 3| projects radially from the upper end cf the collar 30 and overhangs the mechanism thus far described and serves to carry an indicating scale '32 and has a part to be gripped for the pur-- pose of rotating the head for general adjustment. The upper section 33 of the body I4 is secured to the upper side of the flange 3| and serves to carry various parts as will be hereinafter described. In the preferred construction the flange 3| of the body is in the form of a round plate arranged concentric with the axis of the spindle arranged immediately above the top or upper section 33 of the body; The plate I is preferably provided with a fiat suitably finished top face '35 to which work may be applied. I have shown the plate I5 as a plain flat plate, whereas it will be understood that the plate can be provided with holes or work holding devices, as cirrotated adjacent one edge of the plate 35' and'the axis of the connection is horizontally disposed, as is shown throughout the drawings. The means I 1 for adjusting the plate I5 is preferably located at the opposite edge of the plate I5 and may, as I have shown in the drawings, include an adjusting screw 39 threaded through a lug 43 on the plate I5;to project downwardly so its lower end bears on a. bead 4| provided on the upper section 33. The screw 39- as shown in the drawingsis a'thumb screwlhaving an operating head 42 and is adapted to be set in the desired adjustedposition by a lock nut 43. i

In accordance with the preferred form of the invention means is provided for indicating the angular position of the plate I5 about the pivotal 1 means I6. This may include a scale 45 carriedby onelof'the parts, say for'instanca'the body; to

cooperate with an indicator 43 carried by the other part. 1 I

It is also preferred to provide means for maintaining the plate I5 tight relative to the body I4 5 to eliminate vibration or movement. In the form of the invention illustrated I provide a tension spring 41 acting under tension between the plate I5 and the top section 33 of the body to normally urge or swing the plate I5 downwardly and thereby hold the adjusting screw 39 tight on the pad 4|. It will be understood, of course, that there may be a spring 41 at each side of the table as is ---The means I3 provided by the present invention for operating the carriage relative to the base preferably a screw means. best shown in Fig. 2 of the drawings, includes an adjusting screw 50 rotatably supported by a bearing part 5| of the base I0 and threaded through a lug 52 depending from the carriage between the rails of the guideway 22 of the base. A collar 53 a is provided on the outer end of the screw adjacent the bearing 5| and carries a scale 54 to cooperate with a reference mark 55 on the bearing 5I- to 5 indicate the rotative position of the screw. An operating handle 56 is provided outward of the collar 53 so that the screw can be conveniently rotated.

The means I9 provided for operating the cross-f screw beyond the bearing 58 and has graduations 6| cooperating with a reference mark onthe bearing 53 to indicate-the rotative position of the screw. A suitable operating handle 62 is provided immediately beyond the collar 60.

The means 20 provided for releasably setting the head againstrotationincludes, generally, an arm 10 projecting laterally from the crosshead and fixed to the crosshead so that it can be considered a stationary arm, an arm 1| projecting from the body I4 and connected to the body through a clamp device, and a suitable mechanism connecting the outer end portions of the arms 10 and H as will be hereinafter described The arm 10 projects horizontally and laterally from the crosshead to a point somewhat beyond the outer end of the arm 1| and both arms project outwardly beyond the rim or perimeter of the flange 3|. The arm 1| is carriedby the body I4 but is releasably connected thereto so that the body is freeto rotate relative to the arm. In the construction illustrated the arm 1| projects from a split ring 13 which is rotatably supported in a channel 14 in the exterior of the collar 30. The clamp device 12 occurs at the point where the ring 13' is split and it includes lugs on the-ring and a'clamp screw 14 cooperating with the lugs 65 so that the screw can be rotated to clamp the ring tight on'the collar 33 or to releasethe ring from the collar allowing the body I4 to turn freely 7 relative to the arm 1|. The screw 14 projects beyond the outer edge of the flange 3| where it is provided with an-operating handle 15 maki-ngit convenient to operate. v j 7 The mechanism provided by the present invention for connecting'the arms '10 and 1I is de-,

a signed to normally hold the armsagainst move- J ment but, i operable to provideavery fine-or This means, as is The screw is delicate adjustment between the arms when it is desired to accurately adjust the rotative position of the body.

In accordance with the broader principles of the present invention various means may be provided for connecting the arms I and H. However, in the preferred construction this means includes a case 80 slidably supported on the outer end portion of the arm 10 to be shiftable radially relative to the arm. A tension spring 8| is connected between the arms 10 and the case 80 as will be seen in Fig. 2 so that it normally urges the case inwardly toward the center of the mechanism. A vertical spindle 82 is carried by the case to extend through the case and to project above it to carry a disc 83 which acts as a shield for the mechanism. The disc is preferably formed of transparent material. An indicating dial 84 is carried by the spindle 82 at the top of the case 88 to be visible through the disc 83. The dial 84 has graduations 81 which cooperate with a reference mark 86 on the case to show the rotative position of the spindle.

A pinion 85 is fixed on the spindle 82 within the case 88 and meshes with a gear 88 carried on a spindle 89 mounted in the case. The spindle 88 also carries a pinion 90 which meshes with a gear segment 9| fixed on the outer end of the arm H and formed concentric with the spindle I3. Through this mechanism the arms 10 and H are normally secured together against relative movement. However, a very fine or accurate adjustment of the arm 1| relative to the arm 10 can be obtained by rotating the disc 83. It will be apparent that the gear train just described forms a very effective and delicate adjusting means. It will also be apparent that the spring 8| normally serves to hold the gear train tight, keeping lost motion out of the mechanism. In practice I provide a reference mark 85 on the arm 1| to cooperate with the graduations 32 on the flange 3| in order to show the rotative position of the head.

From the foregoing description it is believed that the general action or mode of operation of the mechanism will be fully understood. It will be apparent that the directions of adjustment between the base and the carriage and the carriage and the crosshead, being horizontally disposed and being at right angles to each other, enable the means and 19 to be operated to adjust the crosshead in any desired horizontal direction. The desired general rotative position of the work can be gained by releasing the screw 14" and moving the head including the body M and plate l through engagement of the flange 3|. For fine or delicate rotative adjustment the disc 83 is employed while the screw 14* is set. To tilt or tip the work about a horizontal axis the screw I1 is operated to move the plate l5 about the pivotal mounting l 6.

Having described only a typical preferred form and application of my invention I do not wish to be limited or restricted to the specific details herein set forth, but wish to reserve to myself any variations or modifications that may appear to those skilled in the art or fall within the scope of the following claims.

Having described my invention, I claim:

1. In combination a work carrying head, a mounting supporting the head for rotationabout a vertical axis, an arm projecting from the mounting, a second arm, means releasably con- ,necting the second arm to the head, and means connecting the arms together.

2. In combination a work carrying head, a mounting supporting the head for rotation about a vertical axis, an arm projecting from the mounting, a second arm, a screw operated clamp releasably connecting the second arm to the head, and means connecting the arms to ether.

3. In combination a work carrying head, a mounting supporting the head for rotation about a vertical axis, an arm projecting from the mounting, a second arm, means releasably connecting the second arm to the head, and means connecting the arms together including a gear train.

4. In combination a work carrying head, a mounting supporting the head for rotation about a vertical axis, an arm projecting from the mounting, a second arm, means releasably connecting the second arm to the head, and means connecting the arms together including a gear segment on one arm, a gear carried by the other arm and meshing with the segment, and operating means for the gear.

5. In combination a work carrying head, a mounting supporting the head for rotation about a vertical axis, an arm projecting from the mounting, a second arm, means releasably connecting the second arm to the head, and means connecting the arms together including a gear segment on one arm, a gear carried by the other arm and meshing with the segment, and operating means for the gear including an indicating dial.

6. In combination a work carrying head, a mounting supporting the head for rotation about a vertical axis, an arm projecting from the mounting, a second arm, means releasably connecting the second arm to the head, and means connecting the arms together including a, gear segment on one arm, a case shiftably carried by the other arm, a manually operable gear carried by the case meshing with the segment, and a spring normally yieldingly. urging the case so the gear is kept in tight engagement with the segment.

7. In combination a work carrying head, a mounting supporting the head for rotation about a vertical axis, an arm projecting from the mounting, a second arm,'means releasably connecting the second arm to the head, and means

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