US2530690A - Teeth setting machine - Google Patents

Description

Nov. 21, 1950 B. N. ENGLE ET AL TEETH SETTING MACHINE Original Filed July 5, 1945 f a w m m 7 w 5 a 2 M) 5 v 4 n in z 4' H 0 m 1 MW 19/75 JOH/Y t9. 6/7614 Patented Nov. 21, 1950 TEETH SETTING MACHINE Burr N. Engle and John B. Engle, Los Angeles, Calif.

Original application July 5, 1945, Serial No. 603,288, now Patent No. 2,441,403, dated May 11, 1948. Divided and this application March 23, 1948, Serial No. 16,516

3 Claims.

This application is a division of application Serial Number 603,288, filed July 5, 1945, which matured as Patent No. 2,441,403, dated May 11, 1948, entit ed Teeth Setter for Saws.

This invention relates to means and ways of setting saw teeth automatically without the necessity of making any adjustment after the machine is once set for operation upon a particular spaced set of teeth.

The means include a hammer element for bending every other tooth to one side of the blade and which is actuated by energy controlled by the saw teeth that have been set, thus, eliminating much auxiliar equipment which obviously would increase the cost of such a machine. The energy for working the setter may also be controlled by the teeth of the saw which have not been set.

One of the principal objects of this invention is to present a new and novel saw teeth setting machine that is simple and sturdy in construction, easy and simple to operate, and which is economical to make and manufacture.

Another object is to provide an automatic teeth setting machine in which the operator need only run the blade of the saw along a pair of guides in order to fully set the teeth, the teeth being set at a rapid pace and done in a perfect manner.

Other objects, advantages and features of this invention will appear from th accompanying drawings, the subjoined detailed description, the preamble of these specifications, and th appended claims.

Applicants are now about to illustrate and describe one of the forms of their invention in order to teach one how to make and use the same, but it is to be understood that the drawings and description thereof are not to limit the invention in any sense whatsoever except as limited by the expressions in the claims,

In the drawings:

Figure 1 is a plan view of the invention with parts thereof broken away,

Figure 2 is a cross sectional view of Fig. 1 with portions broken away.

The device comprises a machine having a heavy metal base I with an extended arm 2 for supporting a solenoid 3 over the site where the tooth setting is accomplished. The solenoid is wound as one coil with four taps therefrom, the coil taps each having an insulated conductor wire extending therefrom, for instance, like the ones indicated by the reference characters 4, 5, 6 and I, and the ends of which connect with their respective switch contact points 8, 9, l and I I shown 2 on the distributor switch body I2. end of the solenoid winding is connected by the wire IS with the low side of a power supply switch I4. The switch I4 is preferably a single pole toggle switch connected to a source of suitable electric current by the two wire cord l5. One wire of the cord connects with the switch l4 and the other wire of the cord, the neutral wire, is connected to the base and thus grounded as shown at 62.

A spring-like pointer arm or bar 5| is pivoted to the base at 52 and the pivot pin is insulated from the bar 5| or/and the base I so that the pointer will not make electrical connection or contact with anything except certain bent teeth of the saw indicated at 53 and also of course the Wires connected thereto. This arm 5| is connected to an insulated electrical conductor 54 which leads to the pivot connection 55 of the distributor switch l2; this pivot pin being insulated from the base and the contacts thereon and supporting the switch arm 56, as shown.

At the upper end of the pointer arm 5|, but located and scribed upon the base of the machine, there is an are 51 having a number of spaced divisional lines 58 numbered 4 to 8 and which represent the point measurements of the teeth in the various saws. The pointer is now shown as alined with the divisional line 4 which indicates that the saw 53 is a four point saw, that is, four teeth to the inch. As shown in Fig. 2, the distal end of the pointer has an under pin 59 fixed thereto which is positioned so that it may engage any one of the holes 60 in the base and thus prevent the arm 5| from moving when once set.

At the lower end of the pointer arm 5| there is a flexible electrical contact brush 6| which is positioned for making contact with any one of the teeth of the saw which happens to be bent downwardly. This type of control is workable when one tooth of the saw is bent into position by the hammer 33 to conform with the anvil 39 and thus make good electrical contact with the brush 5|. Obviously, the teeth couldbe bent upwardly and the brush positioned to make contact with such teeth.

By the above arrangement, the plunger blow is regulated by the settings upon the contacts 8-I and the plunger energized every time the brush 6| makes contact with a previously bent tooth as the saw is grounded onto the frame or base. Adjustable saw guides 38 are provided upon the base so that the saw teeth can be guided beneath the plunger in proper position.

A push button switch I4 is provided upon the The other base and one side thereof is connected to an insulated conductor l4" that is connected with the wire 54 or the pointer arm 5| and the other side connected with or grounded to the base I. The purpose of this push button is for independent operation of the plunger when the arm 5| is not in use, that is, by merely pressing the button switch I4, the plunger 33 is operated for setting teeth.

The following is claimed:

1. In a teeth setting device for saws, the device including a base with a top surface adapted to receive the blade of a saw, spaced apart saw guides on the base, an anvil intermediate the guides and alined relative thereto, a solenoid supported by the base and positioned over the anvil, a plunger in the solenoid, the plunger being alined with the anvil and adapted to strike it, a bar pivoted to the base, the bar having a contact brush at one. end thereof which is adapted to make contact with bent teeth of the saw, means supplying electrical current to the solenoid with 4 said bar in series therewith so that the solenoid is energized onl when the brush of the bar makes contact with a tooth of the saw to be set.

2. The device recited in claim 1 wherein the end opposite the brush of the bar has an insulated under pin and the base at this end of the bar has a scale with a plurality of stop holes which represent different tooth spacings of saws.

3. The device recited in claim 1 wherein the bar is elongated and pivoted to the base but insulated therefrom, the brush consisting of a thin metal strip.

BURR N. ENGLE. JOHN B. ENGLE.

REFERENCES CITED UNITED STATES PATENTS Name Date Engle et a1 May 11, 1948 Number

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