US1607657A

US1607657A - Pump construction

Info

Publication number: US1607657A
Application number: US711262A
Authority: US
Inventors: Thomas C Whitehead
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-05-05
Filing date: 1924-05-05
Publication date: 1926-11-23
Anticipated expiration: 1943-11-23

Description

Nov. 23 1926. 1,607,657

T. c. WHITEHEAD PUMP CONSTRUCTION Filed May 5. 1924 my mew W I mrwm,

l mented Nov. 23 llfdde THOMAS C. 'ViTHITEHEAl), F BETBQIT Application filed Itllay 5,

1% tion is to provide a simple and efiicient device that is adapted to be operated automatically -tor controlling the compression within the cylinder of a pump.

Another object is to provide a strong and ti durable device that can be manufactured at a very low cost.

"With the above and other objects in view the invention consists in certain novel teatnres of construction, combination and ar 20 rangements of parts as will be more fully described and particularly pointed out in the appended claims.

in the accompanying diaw1n,

Figure 1 is a central longitudinal seitions al view throu h a June) and relief device embodying my invention;

Figure 2 is a top plan view or? the device.

Referring" now to the drawing in which lilre characters of reference designate corresponding parts through the several views, the numeral 1 designates a cylinder, preterably of a refrigerating pump having inlet and

outlet passages

2 and 3 respectively 35 thegaseous refrigerating medium which is ada ted to be compressed within the cylinder means of a piston 4. This piston. may be reciprocated within the cylinder by any suitable means such as a pitman 5 and is preferably provided with a longitudinally extending passage 6 which communicates with a transversely extending 7. Thus, when the piston is operated a partial vacuum will be formed in the cylinder upon the suction stroke until the inlet passage 2 is uncovered, whereupon the refrigerating gas will be admitted to the cylinder. @n the reverse stroke of the piston the gas will be compressed until the transverse passage '2 in the piston registers with the outlet passage in the cylinder at the completion of the movement whereupon the compressed gas will be discharged through the outlet passage 3.

ln order that the compression in the cylinder may be relieved to facilitate the start- 19%. Serial lilo. M13655.

ing if the pump, ll preferably provide a small vent 8 1n the head 9 of the cylinder.

For controlling the opening and closing of this vent, there is a needle valve 10 having a tapered lower end 11 adapted to seat upon the upper edges of the vent 8. This valve extends upwardly through a flanged tubular guide 12 mounted on the cylinder head 9 and is preferably operated automatically by means of a thermostat 13. [is shown, the thermostat is in the form of an expansible chamber or bellows it that is preferably disposed within a tubular casing 15 which has a flange 16 at the lower end thereof surroundingthe flange 17 of the guide 12 on the cylinder head The closed lower end 18 ot the chamber is secured to the valve 10, While the upper end it} of the chamber preferably abuts the top 20 ot the casing l5 and is pro vided with a tubular projection 21 that extends upwardly through an opening 22 in the casing top 20 Suitable nuts 23 are preferably threaded upon the projection 21 to hold the npner end 19 of the chamber firmly against t is casing" top Qt) while a suitable plug is preferably used to close the 25 the projection 93L desired, a predeteri dned quantity of ethyl bromide may be introduced the chamber l l through the passage 25 in the projection 21 to facilitate the en ansion and contraction or the chamber it, w iile a suitable coil spring 26 is preferably disposed between the lower end 18 ot the chamber and the flange 17 ot the guide and cooperates with the chamber when contracted to hold the valve 10 unseat ed. In order that the gas escaping through the vent may pass into the casing 15 and thenout through the port 27 in one Wall thereof, the guide 12 is preferably provided at its lower end with an outwardly flared portion 28 that connects into the flange l7 and is provided with a plurality of small openings 29 in communication with the vent 8a 1 ll ln use, when the pump is not operating and is cold the chamben l l will be contracteol, hence the valve 10 will be unseated and the compression in the cylinder will be relieved so that it will be comparatively ill) easy to start the pump: However, after the pump is started the chamber 1% will become heated through operation of the piston with in the cylinder and, as a result, Will seat the valve upon the upper edges of the vent 8 in. the cylinder head and will retain the engine and the like.

valve in seated position during the normal operation of the pump. Thus, it will be readily apparent that the compression in the cylinder will be controlled automatically by a very simple and ractical device which may be readily applie to the cylinder heads of any suitable pump, internal combustion Moreover, the relief device is composed of relatively few parts which may be easily and quickly assembled, hence, the cost of manufacture is reduced to a minimum.

While it is believed that from the foregoing description, the nature and advantages ot' the invention will be readily apparent, ll desire to have it understood that I do not limit myself toi what is herein shown and described, and that such changes may be resorted to when desired as fall within the scope of What is claimed.

What I claim as my invention is:

1. The combination with a cylinder having a vent for relieving compression, of means for controlling the opening and closing of said vent, said means including a valve engageable with the vent, a guide for the valve secured to the cylinder, and a thermostat for operating the valve.

2. The combination with a cylinder having a vent for relieving compression, of

moms? means for controlling the opening and closing of said vent, said means including a valve engagcable with the vent, a easing into which said vent opens, and a thermostat within the casing for operating the valve.

3. The combination with a cylinder having a vent for relieving compression, oi means for controlling the opening and closing of said vent, said means including a valve engageable with the vent, a casing enclosing the valve, a thermostat within the casing connected to the valve for operating the same, said thermostat having a tubular projection extending through the casing,

and means for securing the extension to the casing.

4. The combination with a cylinder hav ing a vent for relieving compression, of means for controlling the opening and closing of said vent, said means including a needle valve engageable with the vent, a tubular guide for the valve secured to the cylinder and having an opening communicating with the vent, a casing over the valve and guide and having an opening therein, and a thermostat within the casing for operating the valve, said thermostat being secured to said casing and to said valve.

In testimony whereof I afiix my si nature.

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