US856717A - Timing device. - Google Patents

Description

No. 856,717. PATENTED JUNE 11, 1907. H. H. MOINTIRE.

TIMING DEVICE.

APPLIOA'LION FILED JULY 6, 1905.

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UNITED STATES PATENT 1N DIANA.

Specification of Letters Patent.

Patented June 11, 1907,

Application filed July 6,1905. Serial No. 268.534.

To all whom, it may concern:

Be it known that I, HERVEY H. MoINrmE, a citizen of the United States, residing at South Bend, in the county of St. Joseph and State of Indiana, have invented new and useful Improvements in Timing Devices, of which the following is a specification.

This invention relates to a timing device and while more es ecially adapted for use in connection with pdiotographic printing machines, it is applicable to other machines in which an accurate timing of an operation is to be-made.

The object of the present invention is to provide a timing devicethat will be accurate, positive and eflicient in its operation and which consists of the construction and operative aggrou ment of parts all as will be more fully esoribed, hereinafter illustrated in the accompanying drawings and finally pointed out in the appended claims.

In the drawings-Figure 1 is a front elevation of the device showing in dotted lines one of the positions of the parts. Fig. 2 is a view partly in section and partly in side elevation, the section being taken at the longitudinal center of the parts.

Making renewed reference to the drawings, 1 designates a suitable motor such as an ordinary clock mechanism. An arbor 2 of this clock mechanism is equivalent to the arbor on which the minute hand of a clock is mounted but instead of the ordinary minutehand, a circuit closer 3 is frictionally set upon the arbor 2 so that the latter may rotate while the former remains stationary though the circuit closer will be carried by the arbor when not obstructed by an object. This circuit closer is provided at its pivot point with a suitable binding post 4 to whichis connected a conductor 5 which constitutes one side of an electric circuit.

The face 6 of the motor is provided with a dial 7 shown in the drawings as being divided into fifty units of time and beneath this dial is pivoted an indicator 8, the pivot pin 9 of which is connected to an electric conductor 10 forming the other side of the electric circuit. Projecting from the face 6 is a pin 11 arranged in the path of the circuit closer 3 and acting as a stop for the same in its movement in one direction. Projecting from the pointer 8 is a pin 12 which serves as a stop and contact for the end of the circuit closer 3 when the latter is moved in the other direction. Another pin 13 projects from the face 6 and serves as a stop for the re-setting device 14-. The re-setting device consists of a lever 15 pivoted to the front of the case, as at 16, and having an extension 17 adapted to engage with the stop 13 as shown in dotted lines in Fig. 1. This lever also has an arm 18 projecting toward the extension or lower end 19 of the circuit closer and terminating at its end in a forward extension 20 which, when the lever 15 is pushed forward to the position shown in full lines in Fig. 1. contacts with the extension 19 of the circuit closer and forces the upper end thereof into engagement with the stop .11. Then when the indicator or pointer 8 is set to any position on the scale to predetermine the period of exposure for a picture or for any other operation, the lever 15 may be ushed back to the position shown in dotted lines to release the arm 18 from the extension of the circuit closer and permit the latter to be carried by the a'rbor 2 of the motor, and when its upper end engages with the contact pin 12 on the indicator 8, its movement will be arrested and the electric circuit will be completed. it is preferred to have an electric bell or other annunciator interposed in the circuit so that the same will bring auricular notice of the contact when the circuit is completed,

22 indicates a stop pin for the upper end of the lever 15 and 23 indicates a knob handle for manipulating the resetting device.

Let it be premised that it will take the circuit closer fifty seconds to move from the position shown in full lines in Fig. 1 to the posi tion shown in dotted lines, it will be obvious that if the indicator 8 is set at twenty-five on the dial, the contact pin 12 will be brought to a position nearer to and intermediate the end of the circuit closer and the position it assumes when the pointer is set at 50, and in such position the circuit closes 3 will only have tomove onehalf the distance to complete the circuit and twenty-five seconds will elapse during its movement. If the indicator is set at 1 the contact pin 12 will, of course, always be in engagement with the circuit closer, as shown in dotted lines in Fig, 1.

From this explanation, it is thought that the operation and manipulation of the timing device will be apparent to those skilled in the art to which the invention relates.

Having thus described the invention, what is claimed is:

1. A timing device embodying a motor, a

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circuit closer mounted upon thefface of the motor and operated by the latter, an indicater pivoted upon the face of the motor adjacent one end of the circuit closer, the indicator having a stop near its inner end for cooperation With the circuit closure, and a scale upon the face of the motor over which the indicator moves.

2. A timing device comprising a motor, a circuit closer operated by the motor, an indicator having a stop in the path of the circuit closer, a scale over which the indicator moves, and a lever having an arm projecting into the path of the circuit closure and ad apted to disengage the latter from the indicator.

3. A timing device comprising a motor, a circuit closer operated by the motor, an indicator having a stop in the path of the circuit closer, a fixed stop upon the motor for engagement by the circuit closer at one limit of its movement, and means for resetting the circuit closure.

4. A timing device comprising a motor, a circuit closer operated by the motor, a scale, an indicator movable over the scale, and having a stop arranged in the path of the circuit closer, an electric conductor connected with the indicator, an electric conductor connected with the circuit closer, and a lever having an arm projecting in. the path of the cicuit closer and adapted to disengage the latter from the indicator.

5. A timing device comprising a motor having a rotary driven arbor, a circuit closer frictionally mounted upon the arbor, means to hold the circuit closer against rotation, an

indicator having a stop in the path of the circuit closer and forming one terminal of an electric circuit, means for moving the indicator to change the position of the stop, and a scale over which the indicator moves.

6. A timing device comprising a motor, a circuit closer operated by the motor, a pivoted indicator having a stop in the path of the circuit closure, a lined stop upon the motor for engagement by the circuit closure at one limit of its movement, and a lever having an arm for engagement with the circuit closure to hold the latter in. engagement with one of said stops.

7. A timing device comprising a motor, a pivoted circuit closer, an indicator pivoted. at one end adjacent one end of the circuit closer, a stop carried by the indicator for. cooperation with the circuit closer, and an other stop cooperating with the circuit closer to limit the latter at one limit of its movement.

8. A timing device comprising a motor, a pivoted circuit closer, an indicator pivoted. at one end adjacent one end of the circuit closer, a stop carried by the indicator for cooperation with the circuit closer, and. another stop cooperating with the circuit closer to limit the latter at one limit of its movement, and a resetting device.

In testimony whereof I al'IiX my signature, in presence of two subscribing witnesses.

HERVEY Ill. MolNllltE.

itnesses:

GEORGE Omscn, G. M. COLE.

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