US1177802A - Trammel-wheel. - Google Patents

Description

Patented Apr. 4, 1916.

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TRAMMEL-WHEEL.

APPLICATION FILED AUG-10,1911.

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Patented Apr. 4,1916. 7 2 s'nsnsqnsn 2 UNITE STATES PATENT came WILLIAM A. IPRICE, 0F CINCINNATI, OHIO.

TRAMMEL-WHEEL.

Application filed Angust 10, 1911. Serial No. 643,452.

To all whom it may concern:

Be it known that I, WVILLIAM A. PRICE, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and'useful Improvements in Trammel-IVheels, of which the following is a specification.

This invention relates to improvements in trammel wheels for the conversion of rotary into rectilinear motion with the ratio of two reciprocations of the piston or plunger to every revolution of the trammel wheel.

More specifically my invention embraces in combination with the base of the wheel, a circumferentially extending series of adjustable plates, segmental in shape, forming between contiguous plates the grooveways for the sliding blocks carried by the connecting rod, and adapted to relative radial adjustment to compensatefor the frictional abrasion of the sliding blocks.

With these and other objects in view my invention consists in the construction, combination and arrangement of parts clearly shown in the drawings, and then more particularly pointed out in the appended claim.

In the drawings Figure 1 is a side elevation of my device showing the segmental plates clamped down in position. Fig. 2 is a top plan view thereof, Fig. 3 is a side elevation of the trammel wheel embodying my invention one member being removed to disclose the mortises in the base of the wheel, Fig. -1 is a sectional view of the trammel wheel on the line AA of Fig. 3, Fig. 5 is a sectional view of a segmental plate on the line CC of Fig. 3, Fig. 6 is a detail elevational view of a segmental plate, and Fig. 7 is a sectional view taken on line BB of Fig. 6.

In the drawings wherein similar reference characters designate similar parts in the respective views, 1 is a suitable frame or standard upon which is mounted the trammel wheel 6 at one end having guided connections 2 at the opposite end thereof. The axle 3 of the trammel wheel is mounted in the side frame 1 at one end and fixed thereon is a crank wheel or disk 1 carrying a handle 5, while the trammel wheel 6 is carried at its opposite end. The trammel wheel consists of the usual grooveways 6 for the sliding blocks 18 carried by a connecting rod 7, the latter being pivoted at 8 to the cross bar 9 carrying the sliding or Specification of Letters Patent.

Patented Apr. 4, 1916.

reciprocating rod 9 suitably guided by the members 10.

The trammel wheel 6 comprises twosections 11 and 12 clamped together to rotate v in common, 11 is the base block and at suitable intervals about its circumference it is formed with inwardly and radially extendmg pairs of mortises for corresponding pairs of tenons 1 1-, formed upon each segmental plate, and between each groove way 11 of a pa1r a n upstanding screwthreaded bolt 16 1S positloned. Each segmental plate 12 normally overlies the block 11 and is formed with a rectangular apex and an arcuate margin coinciding with a given portion of the circumference of the block, and the various plates are so disposed upon the block that their rectangular apeXes are in alinement each to each to form the grooveways 6". In order to adjust these plates radially to compensate for the wearing away or abrasion of the sliding blocks. each segmental plate is formed with an opening 13 having a lower reduced end 13 forming vertical slots through which, normally the screwthreaded bolts 16 project to substantially the upper end of the slot. At each side of the reduced opening 13 at the under side of the plate 12 tenons 14 are formed in lesser lengths than the grooveways 11 in the block 11 in which they fit. It will be clear from this arrangement and because the outer wall end of the openings 15 will bear against the bolt or stud 16 when the plate is innormal position, that the plate will be free to move inwardly, guided by the grooveways 14 and the opening 15 to the extent of their outermost limits. The plates having been set in the desired position in the grooveways they are suitably clamped down by satisfactory means such as jam or wing nuts composed of the wings 17 and nut 1.7 the latter effectively bearing edgewise against the margin of the opening 18 it being the office of the enlarged opening 13 to provide clearance for manipulating the nut. It will be understood that the sliding blocks 18 and the grooveways 6 will preferably taper from large at the top of the block to small at the opposite end to restrain the displacement of said blocks.

I claim and desire to secure by Letters Patent In a device of the kind described in combination a plurality of trammel gear sections, one of said sections being a disk, each of the other sections being shaped similarly but being less than a quadrant, a series of radially arranged grooves formed upon said disk, said grooves arranged in pairs at intervals of a quarter of the circumference of said disk, each of said second-named seetions being formed with a pair of ribs disposed parallel to and on either side of its bisector, said ribs being arranged in said grooves whereby to cause the inner edges of said ribbed sections to provide intersecting diametrical tracks, dies slidable in each track, an actuating member pivotally con-Q In testimony whereof I aflix my signature V in presence of two Witnesses.

Witnesses:

LoUIs H. DITMERING, OSCAR BAGKERL A WILLIAM A. PRICE; 7:

Copies of this patent may be obtained for five cents each, by addressing the Commissioner at 'Patente,

Washington, D. 0. i a

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