US1159551A - Speed-indicator. - Google Patents

Description

H. G. THUESEN.

SPEED INDICATOR.

APPLICATION FILED MAR. 21. 1914. 1,159,551. Patented Nov. 9, 1915.

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Q UH 200 an H. e. THUESEN. SPEED INDICATOR.

APPLICATION FILED MAR. 21. I914- Patented Nov. 9, 1915 2 SHEETS-SHEET 2.

\l lllr Suva 14301 GHQ new wirneooeo HOLGER G. THUESEN, OF CEDAR FALLS, IOWA.

SPEED-INDICATOR.

Specification of Letters Patent.

Patented Nov. 9, 1915.

Application filed March 21, 1914. Serial No. 826,354.

To all whom it may concern Be it known that I, HQLGER G. THmisEN, a citizen of the United States, residing at Cedar Falls, in the county of Black Hawk and State of Iowa, have invented certain new and useful Improvements in Speed-Indicators, of which thefollowing is a specification.

Tire object of tlfis invention is to provide a speed indicator in such associated relation with a stop Watch or clock means that the operator can apply the indicator to the shaft or other revolving body and accurately time the operation of the speed indicator so as to correctly ascertain the number of revolugions per minute of the" revolving shaft or ody. I

In the most preferred embodiment of my invention, I provide a speed indicator with a casing in which a stop watch or like clockwork means may be held, and I operatively connect the stop stem of the clock or Watch means with the speed indicator so that when the stem is actuated, the speed indicator will be released to be driven by the revolving body to which it has been applied, release of the stop stem serving to arrest the indicator in order to permit of taking a reading.

Uther features and objects of my invention will be more fully described in connection with the accompanying drawings and will be more particularly pointed out and ascertained in and by the appended claims.

In the drawings :Figure 1 is a view in side elevation illustrating one form of my invention. Fig. 2 is a vertical sectional view thereof. Fig. dis a sectional view on line 33 of Fig. 2, with the operative connection between the stop stem and the speed indicator, omitted. Fig. 4: is a sectional view similar to Fig. 3, illustrating the operative connection between the stop stem and speed indicator. Fig. 5 is a detail view of a friction member embodied in my invention.

Like characters of reference designate similar parts throughout the different figures of the drawings.

'As illustrated, l designates a casing which is shaped to be held in the hand in the manner in which a pistol is held, a clock or watch containing portion 2 being adapted to be held abreast of the palm of the hand, and a speedometer containing portion 3 being adapted to project upwardly between the body of the hand and the thumb, in a manher which will be ciear by reference to Fig. 1.

First, referring to the construction of the speed indicator, 4 designates an indicating splndle having a suitably shaped and if desired, rubber tipped end 5 for engagement W1th the shaft or other revolving body for which a speed indication is desired. The spindle fl is provided with a reduced end 6 which is ournaled in a suitable bearing formed in the casing 1, as will be seen by reference to Fig. 2. The casin 1 is also provlded with a bearing 7 in which a bushing 8 1s disposed. The spindle 4 is provided with an annular groove 9 into which the reduced end of a screw 10 projects, the screw being inserted through the bearing 7 and the bushing 8, as illustrated in Fig. 2. A guard 11 may have one end secured by the screw 10 and may be anchored to the casing l at its other end by'a screw 12. The spindle 4 is provided with a worm 13 which meshes with a. worm wheel 14. The worm wheel liis loosely mounted upon a primary indicator shaft 15 which is provided W1th a shoulder 16. I have provided means for frictionally holding the Worm wheel in engagement with the shoulder 16 so as to drive the shaft 15, and as shown, I provide a spring cup 17 which engages the worm wheel H, as will be seen by reference to F g.3. The spring cup 17 seats on a trans- IIllSSlOD. indicator gear wheel 18 which is fixedly mounted upon the shaft 15 and which is provided with a hub 19 extendinginto an opening in the casing 1, as will be seen by reference to Fig. 3. The shaft 15 is journaled in the hub 19 and a screw 20, turned into the shaft 15, and overlapping the hub 19 and engaging the casing 1, forms an abutment for the hub 19 so that the cup spring 17 will lock wheel 14 frictionally, to the shaft 15 to frictionally transmit rotation thereto.

The casing 1 which is suitably term the primary dial, and the shaft 15 is provided with an indicating hand 22 which is movable abreast of the dial 21 and which I will term the primary indicating hand. A secondary dial 23 is mounted on the casing 1 and a secondary shaft 24: is also mounted in the casing and carries a secondary indicating hand 25, movable over the dial 23. On the shaft 24, I mount a wheel 26, provided with spaced teeth 27 The transmission wheel 18, is provided with a single tooth 28 adapted to mesh with the teeth 27 is provided with a dial 21,

graduated and which 1 will and the arrangement may be at any ratio desired.

It Will be seen that the spring cup 17, coacts with the shaft 16 to frictionally drive the same, by driving thrust imparted by the worm 13 to the worm wheel 14:.

I fix upon the shaft 15, a stop wheel, which is shown in the form of a ratchet wheel 29. The stop Watch shown is provided with a, stop stem head 30 which projects into the space Surrounded by the guard 11 and the casing 1. A lever 31 is pivotally mounted in the casing 1, as indicated at 32, and one end of the lever is provided with a tooth 33 for engagement with the teeth of the stop ratchet 29. The other end of the lever 31 is adapted for engagement with the head 30 of the stop stem of the Watch. The Watch is shown provided with minute and hour hands 34: and 35, respectively, and also a stop hand 36.

If the gearing ratio of the speed indicator is one to one-hundred, and if'it is desired to take a speed indication for a time duration of one minute, the operator will grasp the device in the manner in which a pistol would be grasped and the end 5 will be applied to the rotative body. Pressure will not, initially, be imposed on the lower end of stop lever 31 by the finger, and rotation of the spindle 4 which instantly takes place upon application of the end 5, to the shaft, will simply revolve wheel 14 about the shaft 15, the latter being held against rotation by the ratchet tooth 33, of lever 31. By pressure of the forefinger on lower end of lever 31, the latter will be rocked to disengage tooth 33 and depress the stop stem of the watch by engagement with the head 30. By this means, the indicator is simultaneously released for action at the moment of actuation of the stop clock means. After the duration of time is indicated on the face of the clockor watch, then pressure on the lever 31 is released thereby locking the indicator instantly to insure an accurate speed indication.

I11 order to enable the casing to receive a standard size stop watch, I may make the casing 1 with a removable portion 37, to facilitate insertion and removal ofthe watch.

It is believed that the advantages and utility of my invention will be clearly understood from the foregoing description and while I have herein shown and described one specific form of my invention, I do not wish to belimited thereto except for such limitations as the claims may import.

I claim 1. In a time speed indicator, a casing, a stop watch mounted therein having a controlling stem, a speed indicator means mounted in said casing in proximity to said Watch, and a manually operable ratchet-engaging member arranged to normally hold said speed indicator means against movement and to be manually moved to a position to release said means and to exert operative action upon said stop watch.

2. In a time speed indicator, a casing, a stop watch mounted within said casing in operative position, a speed indicator means mounted in the casing in proximity to said stop watch, a ratchet wheel carried by said speed indicator means, and manually operable means arranged to normally engage with said ratchet wheel and hold the parts I 3. In a time speed indicator, a structure including a stop watch mounted in an operative relation, a speed indicator embodying a spindle adapted to be applied to a rotating body and an indicator dial and hand arranged at a point that the spindle projects from the structure and the indicating dial is in proximity to the dial of said watch, ratchet means formed as a part of said indicator means, and a manually operable ratchet engaging member arranged to normally hold said speed indicator means against movement and be manually moved to a position to release said means and to exert operative action upon said stop watch to thus permit simultaneous 'movement thereof as the spindle is brought into turning relation with a moving part.

In testimony whereof I afiix my signature in presence of two Witnesses.

HOLGER G. THUESEN.

Witnesses W. N. HOSTROP, J. J. THUESEN.-

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