odontograph

American  

[oh-don-tuh-graf, -grahf] / oʊˈdɒn təˌgræf, -ˌgrɑf /

noun

1. an instrument for laying out the forms of gear teeth or ratchets.

---

Other Word Forms

• odontographic adjective
• odontography noun

Etymology

Origin of odontograph

First recorded in 1855–60; odonto- + -graph

Example Sentences

An instrument much employed in the best practice to find the radius which will strike an arc of a circle approximating the true epicycloidal curve, and for finding at the same time the location of the centre wherefrom that curve should be struck, is found in the Willis’ odontograph.

From Project Gutenberg

Then for the flanks place the slant edge of the odontograph coincident and parallel with e, and let its corners coincide with the pitch circle as shown.

From Project Gutenberg

In the table headed centres for the flanks of the teeth, look down the column of 3 inch pitch, and opposite to the 30 in the column of numbers of teeth, will be found the number 49, which indicates that the centre from which to draw an arc for the flank is at 49 on the graduated edge of the odontograph, as denoted in the cut by r.

From Project Gutenberg

For the face curve set the slant edge of the odontograph coincident with the radial line l, and in the table of centres for the faces of teeth, look down the column of 3-inch pitch, and opposite to 30 in the number of teeth column will be found the number 21, indicating that at 21 on the graduated edge of the odontograph, is the location of the centre wherefrom to strike the curve d for the face of the tooth, this location being denoted in the cut at r.

From Project Gutenberg

An improved form of template odontograph, designed by Professor Robinson of the Illinois School of Industry, is shown in Fig.

From Project Gutenberg